Search This Blog

Monday, November 28, 2022

Rock climbing

From Wikipedia, the free encyclopedia
 
A rock climber ascending a rope
 
A rock climber approaches a roof while leading a multi-pitch, traditional route in Custer State Park, United States.

Rock climbing is a sport in which participants climb up, across, or down natural rock formations or artificial rock walls. The goal is to reach the summit of a formation or the endpoint of a usually pre-defined route without falling. Rock climbing is a physically and mentally demanding sport, one that often tests a climber's strength, endurance, agility and balance along with mental control. Knowledge of proper climbing techniques and the use of specialized climbing equipment is crucial for the safe completion of routes.

Because of the wide range and variety of rock formations around the world, rock climbing has been separated into several different styles and sub-disciplines, such as scrambling, bouldering, sport climbing, and trad (traditional) climbing another activity involving the scaling of hills and similar formations, differentiated by the rock climber's sustained use of hands to support their body weight as well as to provide balance.

Rock climbing competitions have the objectives of either completing the route in the least amount of attempts or attaining the farthest point on an increasingly difficult route. Indoor rock climbing is typically split into three disciplines: bouldering, lead climbing, and top roping.

History

Climbing in Germany, circa 1965.

Paintings dating from 200 BC show Chinese men rock climbing. In early America, the cliff-dwelling Anasazi in the 12th century are thought to have been excellent climbers. Early European climbers used rock climbing techniques as a skill required to reach the summit in their mountaineering exploits. In the 1880s, European rock climbing became an independent pursuit outside of mountain climbing.

Although rock climbing was an important component of Victorian mountaineering in the Alps, it is generally thought that the sport of rock climbing began in the last quarter of the nineteenth century in various parts of Europe. Rock climbing evolved gradually from an alpine necessity to a distinct athletic activity. From the middle of the 19th century, the founder of the Alpine Club, John Ball, researched and made known the Dolomites. He was followed there by many other climbers such as Paul Grohmann, Edward R. Whitwell, Michael Innerkofler, Angelo Dibona and Tita Piaz with many first ascents.

Just before the First World War, there was a so-called "Mauerhakenstreit" (German: the Great Piton Debate of 1911) in Central Europe regarding the use of aids in climbing and mountaineering. Paul Preuss and Hans Dülfer were the main actors in these discussions, which have essentially continued to this day. Preuss propagated a pure climbing style. Angelo Dibona, on the other hand, was an advocate of security and was not fundamentally averse to pitons. When Luis Trenker asked how many pitons he had hit in total in life, Dibona replied: "Fifteen, six of them on the Laliderer north face, three on the Ödstein, two on the Croz dell 'Altissimo, one on the Einser and the rest on other difficult climbs."

Aid climbing, climbing using equipment that acts as artificial handhold or footholds, became popular during the period 1920–1960, leading to ascents in the Alps and in Yosemite Valley that were considered impossible without such means. However, climbing techniques, equipment and ethical considerations have evolved steadily. Today, free climbing, climbing using holds made entirely of natural rock while using gear solely for protection and not for upward movement, is the most popular form of the sport. Free climbing has since been divided into several sub-styles of climbing dependent on belay configuration.

Over time, grading systems have also been created in order to compare more accurately the relative difficulties of the rock climbs.

On August 3, 2016, the International Olympic Committee (IOC) formally announced that sport climbing would be a medal sport in the 2020 Summer Olympics. The event debut was postponed to 2021, due to COVID-19.

Style

In How to Rock Climb, John Long writes that for moderately skilled climbers simply getting to the top of a route is not enough- how one gets to the top matters. Within free climbing, there are several distinctions given to ascents:

  • On-sighting a route requires that the climber ascend cleanly (without any falls or rest with the assistance of artificial equipment) on their first attempt without any foreknowledge.
  • Flashing also requires a clean ascent on the first try, though the climber has previous information about the route (often called beta). This may include talking about the with other climbers about the route or observing others climb the route.
  • Redpointing means to make a successful free ascent of the route after having previously tried it. This may include multiple days or even years of "working" the route to learn the specific sequence required.
  • Pinkpointing means to make a successful free ascent of the route after having previously tried it, with protection (or "pro") such as quickdraws or trad equipment pre-placed on the route.

Style is mostly up to each individual climber and even among climbers the verbiage and definitions can differ. Climbers can be more dynamic (using greater force) or static (controlled movements) in their climbing style.

Style is the "weighted" method of how the activity is performed; left is 'better':

how the route from A to B was established:

  • from below / from above
  • alone / team
  • continuous / besieged
  • naturally protected / mix / bolted

how did I climb the route from A to B:

  • free / on aid
  • alone / team
  • on sight / without fall / with fall / with rest
  • protected on lead / preprotected

It is the style that describes your premise for your climbing. When you recognize a style, performance can be judged in relation to it. Since style is "weighted" in the range from "good" to "bad" (from left to right in the list), one can compare ascents of the same route. Good style is to keep the number of input factors (trials, time, equipment) low to leave the result uncertain, and the degree of adventure high. Since style is not the climb itself, you can climb the same route and improve your style over time. Tommy Caldwell and Kevin Jørgensen created their own style before starting the final push up Dawn Wall; they called it "Team Free", and were their yardstick for success.

Ethics

Ethics are values of a more general nature that are linked to the activity 

  • acting in accord with "sportsmanship"
  • acting in accord with nature preservation, sustainable, and LNT practices
  • acting in accord with local culture and history

In sportsmanship, being a "good sport" is the highest honor; be honest, show respect for the opponent and the challenge - and not least take both success and adversity with dignified calm. Go for the ball and not the man.

Ethics to consider when establishing new routes is locally rooted. In Elbsandstein, bolts are OK if placed from below, by hand, not by cracks and not too close. At Gritstone, only natural protection applies. On granite in California, bolts are OK to link cracks together, but only placed from below. In the Alps, several styles live in parallel: long and beautiful routes with a style like in California (M Piola and the Remy brothers), but also new routes with bolts close to cracks and old routes being retrobolted. The number of bolted routes has become so large that the UIAA is worried that the opportunity for naturally protected climbing will diminish. The UIAA uses both style and ethics in its argument, but the goal is to protect some areas that may be the arena for what they call "adventure climbing".

Types of climbing

Most of the climbing done in modern times is considered free climbing—climbing using one's own physical strength, with equipment used solely as protection and not as support—as opposed to aid climbing, the gear-dependent form of climbing that was dominant in the sport's earlier days. Free climbing is typically divided into several styles that differ from one another depending on the choice of equipment used and the configurations of their belay, rope and anchor systems.

As routes get higher off the ground, the increased risk of life-threatening injuries necessitates additional safety measures. A variety of specialized climbing techniques and climbing equipment exists to provide that safety. Climbers will usually work in pairs and utilize a system of ropes and anchors designed to catch falls. Ropes and anchors can be configured in different ways to suit many styles of climbing, and roped climbing are thus divided into further sub-types that vary based on how their belay systems are set up. Generally speaking, beginners will start with top roping and/or easy bouldering and work their way up to lead climbing and beyond.

Due to the length of time and extended endurance required, and because accidents are most likely to happen on the descent, rock climbers do not usually climb back down the route, or "downclimb," especially on the larger multiple pitch class III–IV, or multi-day grade IV–VI climbs.

Aid

Still the most popular method of climbing big walls, aid climbers make progress up a wall by repeatedly placing and weighting gear that is used directly to aid ascent and enhance safety. This form of climbing is typically used when ascent is too technically difficult or impossible for free climbing.

Man sport climbing under overhang

Free

The most commonly used method to ascend climbs refers to climbs where the climber's own physical strength and skill are relied upon to accomplish the climb. Free climbing may rely on top rope belay systems, or on lead climbing to establish protection and the belay stations. Anchors, ropes and protection are used to back up the climber and are passive as opposed to active ascending aids. Sub-types of free climbing are trad climbing and sport climbing. Free climbing is generally done as "clean lead" meaning no pitons or pins are used as protection.

Bouldering

Climbing on short, low routes without the use of the safety rope that is typical of most other styles. Protection, if used at all, typically consists of a cushioned bouldering pad below the route and a spotter, a person who watches from below and directs the fall of the climber away from hazardous areas. Bouldering may be an arena for intense and relatively safe competition, resulting in exceptionally high difficulty standards.

Solo

Solo climbing, or soloing, is a style of climbing in which the climber climbs alone, without the assistance of a belay.

Deep-water solo (DWS)

Deep-water soloing (or psicobloc) is similar to free soloing in that the climber is unprotected and without a rope, but should the climber fall, it is into deep water instead of onto the ground.

Free solo

Free soloing, referred to as "soloing" in the UK, is single-person climbing without the use of any rope or protection system. If a fall occurs and the climber is not over water (as in the case of deep water soloing), the climber is likely to be killed or seriously injured. Though technically similar to bouldering, free solo climbing typically refers to routes that are far taller and/or far more lethal than bouldering. The term "highball" is used to refer to climbing on the boundary between free soloing and bouldering, where what is usually climbed as a boulder problem may be high enough for a fall to cause serious injury (20 ft. and higher) and hence could also be considered to be a free solo.

Roped solo

Solo climbing with a rope secured at the beginning of the climb allowing a climber to self-belay as they advance. Once the pitch is completed the soloist must descend the rope to retrieve their gear, and then reclimb the pitch. This form of climbing can be conducted free or as a form of aid climbing.

Lead

Leader belays the second on Illusion Dweller in Joshua Tree National Park, United States.

Lead climbing is a climbing technique where the lead climber ascends with the rope passing through intermittent anchors that are below them, rather than through a top anchor, as in top-rope climb. A partner belays from below the lead climber, by feeding out enough rope to allow upward progression without undue slack. As the leader progresses they use a runner and carabiners to clip the rope into intermediate points of protection such as active cams, or passive protection such as nuts; this limits the length of a potential fall. The leader also may clip into pre-placed bolts. Indoor gyms might have short runners pre-attached to fixed anchor points in the wall.

Unlike top-rope climbing, where the climber is always supported by an anchor located above the climber, lead climbing often involves scenarios where the climber will be attached to a point under him or her. In these cases, if the climber were to fall, the distance fallen would be much greater than that of top-rope and this is one of the main reasons lead climbing can be dangerous. The fall factor is the ratio of the height a climber falls and the length of rope available to absorb the fall. The higher the fall factor, the more force placed on the climber as the ropes decelerate them. The maximum fall factor is 2. It is often advised that climbers who are interested in lead climbing should learn from experienced climbers and participate in training sessions before lead climbing on their own.

Multi-pitch

The climbing rope is of a fixed length; the climber can only climb the length of the rope. Routes longer than the rope length are broken up into several segments called pitches; this is known as multi-pitch climbing. At the top of a pitch, the first climber to ascend (also known as the leader), sets up an anchor and then belays the second climber (also known as the follower) up to the anchor; as the second climber follows the route taken by the leader, the second climber removes ("cleans") the carabiners and anchors placed along the way in order to use them again on the next pitch. While "cleaning" the route, the follower attaches the carabiners and anchors to his or her harness belt loops. Once both climbers are at the top anchor, the leader begins climbing the next pitch, and so on, until the top of the route is reached.

In either case, upon completion of a route, climbers can walk back down if an alternate descent path exists, or rappel (abseil) down with the rope.

Sport

The act of climbing single- or multi-pitch routes, protected by permanently-fixed bolts and anchors drilled into the rock, using a rope and the aid of a belayer. Unlike traditional rock climbing, sport climbing involves the use of protection (bolts) placed with power drills or on rappel or permanent anchors which are attached to the rock walls. This is separate from bolted trad climbing.

Traditional

Traditional or trad climbing involves rock climbing routes in which protection against falls is placed by the climber while ascending. In the unusual event bolts are used, these are placed on lead (usually with a manual drill). More commonly removable gear called cams, hexes, and nuts are placed in constrictions or cracks in the rock to protect against falls (in place of bolts) but not to aid the ascent directly. Due to the difficulty of placing bolts on lead, bolts tend to be placed farther apart than on many sport climbs. Once bolted on lead, if repeat ascensions can repeat the route using only the previously placed bolts for protection, the route would then be considered a sport climb, and repeat ascents would be considered to be done in the sport climbing rather than trad climbing style. Routes which are protected by a mixture of preplaced bolts and traditional climbing protection (cams/nuts/hexes) are commonly referred to as "mixed" routes, as in a mix of trad and sport climbing. Historically, pitons (a kind of deformable nail) were placed in constrictions in the rock instead of hexes, nuts and cams. These are difficult to remove and often destructive, resulting in a number of unremovable "fixed" pitons on many older traditionally protected routes. These are frequently used in a similar fashion to bolts, although they are not as trustworthy and by convention are not considered when evaluating if a route is a trad climb, sport climb or mixed climb the way bolts might be.

Top rope

Top roping Balthazar (12), in the Morialta Conservation Park near Adelaide, South Australia. Top roping is the most accessible style of climbing for beginners.

Commonly known as top roping, top rope climbing is climbing in which a climber is belayed from the ground or the base of the route. A belay system resembling a pulley in which an anchor has been created at the top of a climb, through which the rope runs through from the belayer on the ground, to the climber on the ground (position before starting the climb). The rope is "taken-in," to clear up the slack as the climber moves upwards, so in the event of a fall, the climber falls the shortest distance possible. The length of a fall is normally no more than a meter, but can vary depending on the length of the route (the longer the rope, the more stretch the rope will undergo when weighted) and the weight of the climber compared to that of the belayer, among other things.

Top Roping

Belaying a climber from the top of a route, bringing them up to walk off or continue on to next pitch. A similarly safe system of climbing a route as top-roping, except the belayer has set the anchors at the top of the climb (normally after leading a route, in which case the climber is "seconding") to belay the climber either indirectly (belayer is part of the system and can be vulnerable when exposed to unexpected directions of pull and loading of the rope) or directly (belayer is not part of the system and belaying is done directly from the anchors using either an Italian / Munter Hitch or adapted use of a belay device), up the route from the top. If bolts have been clipped or traditional gear placements have been made, it is the job of the climber to collect and clean the route.

Via ferrata

A method of fairly easily ascending a route, heavily dependent on permanent protection rather than using natural rock features to proceed.

Climber with climbing gear attached at his harness

Techniques

Different types of rock require different techniques to successfully climb.

Crack

In crack climbing, the climber ascends a rock crack using specific techniques such as jamming, stemming, and laying back. Cracks can vary in size from smaller than the width of a finger to larger than human body size. Climbers may protect their hands from sharp-edged rock with tape.

Face

Face climbing is a type of climbing where climbers use features and irregularities in the rock such as finger pockets and edges to ascend a vertical rock face.

Slab

Slab climbing, also known as friction climbing, is classified by the slope of the rock. A slope for slab climbing is less than ninety degrees, and prioritizes footwork. It is also known as friction climbing, and although this might sound easy, slab is considered one of the more challenging types of climbing. Popular techniques for slab are smearing, maintaining a center of gravity, and high steps. Two of the most renowned locations for slab climbing are Joshua Tree and Yosemite, but the Looking Glass mountain and Moab are also great options. The hardest slab route ever climbed is Cryptography located in Saint Loup, Switzerland, and ascended by Alessandro Zeni.

Simul

Short for "simultaneous", simul climbing is when two climbers move at the same time. The pseudo-lead climber places gear that the pseudo-follower collects. When the leader runs low on gear they construct a belay station where the follower can join them to exchange gear. The stronger climber is often the pseudo-follower since a fall by the follower would pull the leader from below towards the last piece of gear—a potentially devastating fall for the leader. In contrast, a fall from the leader would pull the follower from above, resulting in a less serious fall. Most speed ascents involve some form of simul climbing but may also include sections of standard free climbing and the use of placed gear for advancement (i.e. partial aid or pulling on gear).

Grading systems

Climbing communities in many countries and regions have developed their own rating systems for routes. Ratings, or grades, record and communicate consensus appraisals of difficulty. Systems of ratings are inherently subjective in nature, and variation of difficulty can be seen between two climbs of the same grade. Hence, there may be occasional disagreements arising from physiological or stylistic differences among climbers. The practice of rating a climb below its actual difficulty is known as sandbagging.

The most commonly used rating systems in the United States are the Yosemite Decimal System and the Hueco V-scale bouldering grade. The current ranges for climbing routes are 5.0 for easy beginner routes to 5.15 being world class and V0–V16, respectively. As the limit of human climbing ability has not yet been reached, neither grading system has a definite endpoint and they are thus subject to revision.

Climbing grades simplified. There are many other grades but these are the most used.

The ratings take into account multiple factors affecting a route, such as the slope of the ascent, the quantity and quality of available handholds, the distance between holds, ease of placing protection and whether advanced technical maneuvers are required. Typically the rating for the hardest move on the wall will be the rating for the whole climb. While the height of a route is generally not considered a factor, a long series of sustained hard moves will often merit a higher grade than a single move of the same technical difficulty. For example, a climb with multiple 5.11 moves with no rests may thus be rated a 5.12.

Terminology

As climbing routes or problems increase in difficulty, climbers learn to develop skills that help them complete the climbs clean. There are several techniques for hands and feet as well as terms for motions that combine the two. For indoor gyms, route setters visualize and create routes for climbers, placing different kinds of holds in specific parts of the wall at particular angles because they intend climbers to use certain techniques.

Types of holds

Jug: A large open hold. Typically in the shape of a V.

Sloper: A negative smooth hold, typically in the shape of a ball or half moon.

Pockets: A hold that has a hole in it with just enough room for one or two fingers to fit inside of it.

Woman using a negative sloper as main hold

Horn: A protruding hold that is typically smooth like a sloper. These are held by wrapping your arm, or entire palm around the hold. The more surface area you have on this hold the better.

Pinch: A pinch can either be used vertically or horizontally. With a pinch hold, the muscles between the index finger and thumb are used.

Crimp/Crimper: A crimp hold allows climbers to use their fingertips to grab edges; the fingers arch.

Arête: A sharp corner or vertical edge

Volume: Volumes are wood or fiberglass structures that are supported by the climbing wall. They are generally giant, prism-like features that are introduced to change the dynamics of the wall. In Europe large climbing holds can be considered volumes, while in the US, the actual surface volume of the wall is changed by a volume.

Climber using an edge to pull herself up

Environments

An indoor climbing wall

Indoor

Indoor climbing occurs in buildings on artificial rock structures. This permits for climbing in all types of weather and at all times of the day. Climbers climb indoors to improve their skills and techniques, as well as for general exercise or fun. Indoor climbing gyms typically provide rope setups and ensure that new climbers know safe techniques.

While indoor climbing is meant to be graded the same as outdoor climbing, it can sometimes be inaccurate. For example, a small gym might rate a route as a 5.10d, whereas a larger gym might have chosen to grade the route a 5.10a. Nonetheless, indoor gyms are a convenient and climate-controlled space to train for the outdoor world.

Outdoor

Outdoors, climbs usually take place on sunny days when the holds are dry and provide the best grip, but climbers can also attempt to climb at night or in adverse weather conditions if they have the proper training and equipment. However, night climbing or climbing in adverse weather conditions will increase the difficulty and danger on any climbing route.

Equipment

Most climbers choose to wear specialized rubber climbing shoes which are often of a smaller size than their normal street shoes in order to improve sensitivity towards foot placements and use the tightness to their advantage. Climbing chalk (MgCO3) is commonly used as a drying agent to minimize sweating of the hands. Most other equipment is of a protective nature. Rock climbing is inherently dangerous, so to minimize the potential consequences resulting from a fall, climbers use protection. The most basic protective equipment is a climbing rope. Climbing pioneers would attach the rope to themselves; in the event of a fall, the rope would usually cause injury to the climber in the hope that it prevented death. With advances in technology came the development of specialized harnesses, carabiners which are used for clipping into belay and rappel anchors and connecting gear, and belay devices which are used to catch a falling climber, hold or lower a climber and for rappelling. Eventually, the placement of bolts with the use of quickdraws led to the rise of sport climbing. Traditional climbers developed the spring-loaded camming device, which allowed a wider variety of climbing styles to be adequately protected compared to chocks and hexes. Traditionally pitons were used however in most areas protection which damages the rock is discouraged. Most climbers choose to wear a specialized climbing helmet to protect them from falling rocks or equipment or head injuries from crashing into rocks.

Injuries

Injuries in rock climbing are mainly sports injuries that occur due to falls or overuse. Injuries due to falls are relatively uncommon; the vast majority of injuries result from overuse, most often occurring in the fingers, elbows, and shoulders. Such injuries are often no worse than torn calluses, cuts, burns and bruises. There are a number of skincare products specifically for climbers available in the market. However, overuse symptoms, if ignored, may lead to permanent damage especially to tendons, tendon sheaths, ligaments, and capsules. Taping of fingers and elbows to prevent injuries is common practice and there are various techniques for taping.

Photo topos

Topo image of cliff Toix Est in the Costa Blanca region of Spain, by climber Chris Craggs from a Rockfax guidebook

Illustrated photo-topos are widely used in rock climbing. Many of them are found in climbing and mountaineering guidebooks such as those published by Rockfax, or the British Mountaineering Council. Full-colour photo-topo diagrams have replaced the previous generation of text based guidebooks, which were illustrated with hand-drawn diagrams. The use of drones has helped improve the quality of images of many of the cliffs.

Site access

Cultural considerations

Some areas that are popular for climbing, for example in the United States and Australia, are also sacred places for indigenous peoples. Many such indigenous people would prefer that climbers not climb these sacred places and have made this information well known to climbers. A well-known example is the rock formation that Americans have named Devils Tower National Monument. Native American cultural concerns also led to complete climbing closures at Cave Rock at Lake Tahoe, Monument Valley, Shiprock and Canyon de Chelly.

Climbing activities can sometimes encroach on rock art sites created by various Native American cultures and early European explorers and settlers. The potential threat to these resources has led to climbing restrictions and closures in places like Hueco Tanks, Texas, and portions of City of Rocks National Reserve, Idaho.

In Australia, the monolith Uluru (Ayers Rock) is sacred to local indigenous communities and climbing is banned on anything but the established ascent route (and even then climbing is discouraged, and soon to be discontinued). Elsewhere in Australia, many formerly popular climbing routes in areas such as the Grampians and Arapiles have been closed due to indigenous cultural concerns.

Indigenous peoples are not the only cultures that object to climbing on certain rock formations. Professional climber Dean Potter kicked off a major controversy when he ignored long-accepted convention to scale Delicate Arch in 2006, resulting in strict new climbing regulation in Arches National Park.

Private property

Many significant rock outcrops exist on private land. Some people within the rock climbing community have been guilty of trespassing in many cases, often after land ownership transfers and previous access permission is withdrawn. In the U.S. the climbing community responded to access closures by forming the Access Fund. This is an "advocacy organization that keeps U.S. climbing areas open and conserves the climbing environment. Five core programs support the mission on national and local levels: public policy, stewardship and conservation (including grants), grassroots activism, climber education and land acquisition." In the U.K. the British Mountaineering Council represents climbers and their interest of public access to crags, cliffs and boulders. In Europe there are different rules in different countries regarding the rights of landowners and climbers.

Environmental impact

Although many climbers adhere to "minimal impact" and "leave no trace" practices, rock climbing is sometimes damaging to the environment. Common environmental damages include: soil erosion, breaking rock features, chalk accumulation, litter, abandoned bolts and ropes, human excrement, introduction of foreign plants through seeds on shoes and clothing, as well as damage to native plant species (especially those growing in cracks and on ledges as these are often intentionally removed during new route development through a process commonly referred to as cleaning).

Clean climbing is a style of rock climbing which seeks to minimize some of the aesthetically damaging side effects of some techniques used in trad climbing and more often, aid climbing by avoiding using equipment such as pitons, which damage rock.

Climbing can also interfere with raptor nesting since the two activities often take place on the same precipitous cliffs. Many climbing area land managers institute nesting season closures of cliffs known to be used by protected birds of prey like eagles, falcons and osprey.

Many non-climbers also object to the appearance of climbing chalk marks, anchors, bolts and slings on visible cliffs. Since these features are small, visual impacts can be mitigated through the selection of neutral, rock-matching colors for bolt hangers, webbing and chalk. The use of certain types of climbing gear is banned altogether at some crags due to the risk of damage to the rock face. In such cases, climbers use knotted slings and ropes for climbing protection.

Blowtorching is another climbing-induced impact that affects the rocks themselves. Blowtorching is when a climber uses a blowtorch to dry holds on a wet route. This mainly happens in areas that tend to have wet climbing conditions. Blowtorching is not only detrimental to the rock itself and can have permanent damage but it also leaves a very large burn mark that most non-climbers would object to the appearance of.

Vandalism

The most significant form of vandalism directly attributable to rock climbers is the alteration of the climbing surface to render it more climber-friendly.

With the advent of hard, bolted sport climbing in the 1980s, many routes were "chipped" and "glued" to provide additional features, allowing them to be climbed at the standard of the day. This attitude quickly changed as the safer sport climbing technique allowed climbers to push hard without much risk, causing the formerly more-or-less fixed grades to steadily rise. Altering routes began to be seen as limiting and pointless.

Unlike traditional climbing which generally uses protection only as a backup in case of falls, some forms of climbing—like sport climbing, canyoneering or, especially, aid climbing—rely heavily on artificial protection to advance, either by frequent falls or by directly pulling on the gear. Often these types of climbing involve multiple drilled holes in which to place temporary bolts and rivets, but in recent years an emphasis on clean techniques has grown.

Today, the charge of vandalism in climbing is more often a disagreement about the appropriateness of drilling and placing permanent bolts and other anchors. Although new fixed anchors are rarely placed by climbers, their dependency on the existing fixed anchors results in the difference between life and death. But the existing anchors remain on the climbing structure for long periods of time, changing the dynamic of the structure itself. Due to the permanent impact of the fixed anchors in wilderness areas, it was prohibited by the Wilderness Act. However, in 1990, there was a movement by the Forest Service and the Task Group to change the regulations such that fixed anchors would be allowed but still regulated in wilderness areas. These improvements led to protection for both the climbers and the Wilderness Act. Typically in the USA, the first ascensionists decide where to place protection on a new route and later climbers are supposed to live with these choices. This can cause friction and retro-bolting when the route is perceived to be dangerous to climbers who actually lead at the grade of the climb, since the first ascensionists often lead at a higher grade and therefore do not require as much protection. Failing to properly design a new route at its grade is considered arrogant and very poor form. Even in strongholds of rock-climbing tradition like Yosemite National Park, many routes are being gradually upgraded to safer standards of protection.

Mont Blanc

From Wikipedia, the free encyclopedia

Mont-Blanc from Planpraz station.jpg
Summit of Mont Blanc and the Bosses ridge
Highest point
Elevation4,807.81 m (15,773.7 ft)
Prominence4696 m ↓ by Lake Kubenskoye
Ranked 11th
Parent peakMount Everest[note 1]
Isolation2,812 km → Kukurtlu Dome [de]
ListingCountry high point
Ultra
Seven Summits
Coordinates45°50′0″N 6°52′2″ECoordinates: 45°50′0″N 6°52′2″E
Geography
Mont Blanc is located in Alps
LocationAosta Valley, Italy
Auvergne-Rhône-Alpes, France
CountriesFrance and Italy
Parent rangeGraian Alps
Climbing
First ascent8 August 1786 by

Mont Blanc (French: Mont Blanc [mɔ̃ blɑ̃]; Italian: Monte Bianco [ˈmonte ˈbjaŋko], both meaning "white mountain") is the highest mountain in the Alps and Western Europe, rising 4,807.81 m (15,774 ft) above sea level. It is the second-most prominent mountain in Europe, after Mount Elbrus, and it is the eleventh most prominent mountain summit in the world.

It gives its name to the Mont Blanc massif which straddles parts of France, Italy and Switzerland. Mont Blanc's summit lies on the watershed line between the valleys of Ferret and Veny in Italy, and the valleys of Montjoie, and Arve in France. Ownership of the summit area has long been a subject of dispute between France and Italy.

The Mont Blanc massif is popular for outdoor activities like hiking, climbing, trail running and winter sports like skiing, and snowboarding. The most popular climbing route to the summit of Mont Blanc is the Goûter Route, which typically takes two days.

The three towns and their communes which surround Mont Blanc are Courmayeur in Aosta Valley, Italy; and Saint-Gervais-les-Bains and Chamonix in Haute-Savoie, France. The latter town was the site of the first Winter Olympics. A cable car ascends and crosses the mountain range from Courmayeur to Chamonix, through the Col du Géant. The 11.6 km (7+14-mile) Mont Blanc Tunnel, constructed between 1957 and 1965, runs beneath the mountain and is a major transalpine transport route.

Geology

Mont Blanc and adjacent mountains in the massif are predominately formed from a large intrusion of granite (termed a batholith) which was forced up through a basement layer of gneiss and mica schists during the Variscan mountain-forming event of the late Palaeozoic period. The summit of Mont Blanc is located at the point of contact of these two rock types. To the south west, the granite contact is of a more intrusive nature, whereas to the north east it changes to being more tectonic. The granites are mostly very-coarse grained, ranging in type from microgranites to porphyroid granites. The massif is tilted in a north-westerly direction and was cut by near-vertical recurrent faults lying in a north–south direction during the Variscan orogeny. Further faulting with shear zones subsequently occurred during the later Alpine orogeny. Repeated tectonic phases have caused breakup of the rock in multiple directions and in overlapping planes. Finally, past and current glaciation caused significant sculpting of the landscape into its present-day form.

The first systematic account of the minerals of the Mont Blanc area was published in 1873 by Venance Payot. His list, entitled "Statistique minéralogique des environs du Mt-Blanc", catalogued 90 mineral types although it also included those present only as very small components of rocks. If these are excluded, it is known today that at least 68 separate mineral species occur across the wider range of the Mont Blanc massif.

Climate

Located on the watershed between the Rhône and the Po, the massif of Mont Blanc is also situated between the two different climatic regions of the northern and western Alps, and that of the southern Alps. Climatic conditions on the Mer de Glace are similar to those found on the northern side of the Swiss Alps.

The climate is cold and temperate (Köppen climate classification Cfb), and is greatly influenced by altitude. Being the highest part of the Alps, Mont Blanc and surrounding mountains can create their own weather patterns. Temperatures drop as the mountains gain in height, and the summit of Mont Blanc is a permanent ice cap, with temperatures around −20 °C (−4 °F). The summit is also prone to strong winds and sudden weather changes. Because of its great overall height, a considerable proportion is permanently glaciated or snow-covered and is exposed to extremely cold conditions.

There is, however, significant variation in precipitation with altitude. For example, the village of Chamonix below Mont Blanc is at an elevation of approximately 1,030 metres (3,380 ft) and receives around 1,020 mm (40 in) of annual precipitation, whilst the Col du Midi, which is at 3,500 metres (11,500 ft) above sea level, receives significantly more, totalling 3,100 mm (122 in). However, at an even higher altitude (near to the summit of Mont Blanc) precipitation is considerably less, with only around 1,100 mm (43 in) recorded, despite the latter measurements being taken at a height of 4,300 metres (14,100 ft).

History

Mont Blanc as seen from Valdigne in Aosta Valley, Italy.

Since 1760 Swiss naturalist Horace-Bénédict de Saussure began to go to Chamonix to observe Mont Blanc. He tried with the Courmayeur mountain guide Jean-Laurent Jordaney, a native of Pré-Saint-Didier, who accompanied De Saussure since 1774 on the Miage Glacier and on Mont Crammont.

The first recorded ascent of Mont Blanc (at the time neither within Italy nor France) was on 8 August 1786 by Jacques Balmat and the doctor Michel Paccard. This climb, initiated by Horace-Bénédict de Saussure, who gave a reward for the successful ascent, traditionally marks the start of modern mountaineering. The first woman to reach the summit was Marie Paradis in 1808.

Mont Blanc from the TMB

Ownership of the summit

At the scale of the Mont Blanc massif, the border between Italy and France passes along most of the main Alpine watershed, from the Aiguille des Glaciers to Mont Dolent, where it reaches the border with Switzerland. However, its precise location near the summits of Mont Blanc and nearby Dôme du Goûter has been disputed since the 18th century. Italian officials claim the border follows the watershed, splitting both summits between Italy and France, while French officials claim the border avoids the two summits, placing both of them entirely with France. The size of these two (distinct) disputed areas is approximately 65 ha on Mont Blanc and 10 ha on Dôme du Goûter.

Since the French Revolution, the issue of the ownership of the summit has been debated. From 1416 to 1792, the entire mountain was within the Duchy of Savoy. In 1723, the Duke of Savoy, Victor Amadeus II, acquired the Kingdom of Sardinia. The resulting state of Sardinia was to become preeminent in the Italian unification. In September 1792, the French Revolutionary Army of the Alps under Anne-Pierre de Montesquiou-Fézensac seized Savoy without much resistance and created a department of the Mont Blanc. In a treaty of 15 May 1796, Victor Amadeus III of Sardinia was forced to cede Savoy and Nice to France. In article 4 of this treaty, it says: "The border between the Sardinian kingdom and the departments of the French Republic will be established on a line determined by the most advanced points on the Piedmont side, of the summits, peaks of mountains and other locations subsequently mentioned, as well as the intermediary peaks, knowing: starting from the point where the borders of Faucigny, the Duchy of Aoust and the Valais, to the extremity of the glaciers or Monts-Maudits: first the peaks or plateaus of the Alps, to the rising edge of the Col-Mayor". This act further states that the border should be visible from the town of Chamonix and Courmayeur. However, neither is the peak of the Mont Blanc visible from Courmayeur nor is the peak of the Mont Blanc de Courmayeur visible from Chamonix because part of the mountains lower down obscure them.

After the Napoleonic Wars, the Congress of Vienna restored the King of Sardinia in Savoy, Nice, and Piedmont, his traditional territories, overruling the 1796 Treaty of Paris. Forty-five years later, after the Second Italian War of Independence, it was replaced by a new legal act. This act was signed in Turin on 24 March 1860 by Napoleon III and Victor Emmanuel II of Savoy, and deals with the annexation of Savoy (following the French neutrality for the plebiscites held in Tuscany, Modena, Parma and Romagna to join the Kingdom of Sardinia, against the Pope's will). A demarcation agreement, signed on 7 March 1861, defined the new border. With the formation of Italy, for the first time Mont Blanc was located on the border of France and Italy, along the old border on the watershed between the department of Savoy and that of Piedmont formerly belonging to the Kingdom of Savoy.

The 1860 act and attached maps are still legally valid for both the French and Italian governments. In the second half of the nineteenth century, on surveys carried out by a cartographer of the French army, Captain JJ Mieulet, a topographic map was published in France, which incorporated the summit into French territory, making the state border deviate from the watershed line, and giving rise to the differences with the maps published in Italy in the same period.

Modern Swiss mapping, published by the Federal Office of Topography, plots a region of disputed territory (statut de territoire contesté) around the summits of both Mont Blanc and the Dôme du Goûter. One of its interpretations of the French-Italian border places both summits straddling a line running directly along the geographic ridgeline (watershed) between France and Italy, thus sharing their summits equally between both states. However, a second interpretation places both summits, as well as that of Mont Blanc de Courmayeur (although much less clearly in the latter case), solely within France.

NATO maps take data from the Italian national mapping agency, the Istituto Geografico Militare, which is based upon past treaties in force.

As of 2021, the border dispute between the two countries is ongoing.

1832 Map of the Kingdom of Sardinia showing an administrative border passing through the summit of Mont Blanc. This was the same map annexed to the 1860 treaty to determine the current border between France and Italy.
Captain Mieulet map of 1865 placing the international border south of the watershed
A Sardinian Atlas map of 1869 showing the international border on the watershed.
1:50'000 Swiss National Map, with both disputed areas marked
1:50'000 Swiss National Map, with both disputed areas marked

Vallot

The original Vallot refuge (now rebuilt) near Mont Blanc summit, at an altitude of 4,362 m

The first professional scientific investigations on the summit were conducted by the botanistmeteorologist Joseph Vallot at the end of the 19th century. He wanted to stay near the top of the summit to undertake detailed research, so he built his permanent cabin.

Janssen observatory

In 1890, Pierre Janssen, an astronomer and the director of the Meudon astrophysical observatory, considered the construction of an observatory at the summit of Mont Blanc. Gustave Eiffel agreed to take on the project, provided he could build on a rock foundation, if found at a depth of less than 12 m (39 ft) below the ice. In 1891, the Swiss surveyor Imfeld dug two 23-metre-long (75 ft) horizontal tunnels 12 metres (39 ft) below the ice summit but found nothing solid. Consequently, the Eiffel project was abandoned.

Despite this, the observatory was built in 1893. During the cold wave of January 1893, a temperature of −43 °C (−45 °F) was recorded on Mont Blanc, being the lowest ever recorded there.

Levers attached to the ice supported the observatory. This worked to some extent until 1906 when the building started leaning heavily. The movement of the levers corrected the lean slightly, but three years later (two years after Janssen's death), a crevasse started opening under the observatory. It was abandoned. Eventually the building fell, and only the tower could be saved in extremis.

Air crashes

The mountain was the scene of two fatal air crashes; Air India Flight 245 in 1950 and Air India Flight 101 in 1966. Both planes were approaching Geneva Airport and the pilots miscalculated their descent; 48 and 117 people, respectively, died. The latter passengers included nuclear scientist Homi J. Bhabha, known as the "father" of India's nuclear programme.

Tunnel

Entrance of the Mont Blanc Tunnel in Italy.

In 1946, a drilling project was initiated to carve a tunnel through the mountain. The Mont Blanc tunnel would connect Chamonix, France, and Courmayeur, Italy, and become one of the major transalpine transport routes between the two countries. In 1965, the tunnel opened to vehicle traffic with a length of 11,611 metres (7.215 mi).

1999 disaster

In 1999, a transport truck caught fire in the tunnel beneath the mountain. In total 39 people were killed when the fire raged out of control. The tunnel was renovated in the aftermath to increase driver safety. Renovations include computerised detection equipment, extra security bays, a parallel escape shaft, and a fire station in the middle of the tunnel. The escape shafts also have clean air flowing through them via vents. Any people in the security bays now have live video contact to communicate with the control centre. A remote site for cargo safety inspection was created on each side: Aosta in Italy and Passy-Le Fayet in France. Here all trucks are inspected before entering the tunnel. These remote sites are also used as staging areas to control commercial traffic during peak hours. The renovated tunnel reopened three years after the disaster.

Elevation

Mont Blanc summit

The summit of Mont Blanc is a thick, perennial ice-and-snow dome whose thickness varies. No exact and permanent summit elevation can therefore be determined, though accurate measurements have been made on specific dates. For a long time, its official elevation was 4,807 m (15,771 ft). In 2002, the IGN and expert surveyors, with the aid of GPS technology, measured it to be 4,807.40 m (15,772 ft 4 in).

View from the Glacier des Bossons, May 2021

After the 2003 heatwave in Europe, a team of scientists remeasured the height on 6 and 7 September. The team was made up of the glaciologist Luc Moreau, two surveyors from the GPS Company, three people from the IGN, seven expert surveyors, four mountain guides from Chamonix and Saint-Gervais and four students from various institutes in France. This team noted that the elevation was 4,808.45 m (15,775 ft 9 in), and the peak was 75 cm (30 in) away from where it had been in 2002.

After these results were published, more than 500 points were measured to assess the effects of climate change and the fluctuations in the height of the mountain at different points. Since then, the elevation of the mountain has been measured every two years.

The summit was measured again in 2005, and the results were published on 16 December 2005. The height was found to be 4,808.75 m (15,776 ft 9 in), 30 cm (12 in) more than the previous recorded height. The rock summit was found to be at 4,792 m (15,722 ft), some 40 m (130 ft) west of the ice-covered summit.

In 2007, the summit was measured at 4,807.9 m (15,774 ft) and in 2009 at 4,807.45 m (15,772 ft). In 2013, the summit was measured at 4,810.02 m (15,781 ft) and in 2015 at 4,808.73 m (15,777 ft). From the summit of Mont Blanc on a clear day, the Jura, the Vosges, the Black Forest and the Massif Central mountain ranges can be seen, as well as the principal summits of the Alps.

Mont Blanc seen from the Rébuffat platform on Aiguille du Midi
 
View from Vallee Blanche of Glacier du Géant and Dent du Géant, looking down Glacier du Tacul towards the Mer de Glace, with Aiguille du Moine, les Drus and Aiguille Verte in centre-left

Climbing routes

Mont Blanc 3D

Several classic climbing routes lead to the summit of Mont Blanc:

  • The most popular route is the Goûter Route, also known as the Voie Des Cristalliers or the Voie Royale. Starting from Saint-Gervais-les-Bains, the Tramway du Mont-Blanc (TMB) is taken to get to the Gare du Nid d'Aigle. The ascent begins in the direction of the Refuge de Tête Rousse, crossing the Grand Couloir or Goûter Corridor, considered dangerous because of frequent rockfalls, leading to the Goûter Hut for night shelter. The next day the route leads to the Dôme du Goûter, past the emergency Vallot cabin and L'arrête des Bosses.
  • La Voie des 3 Monts is also known as La Traversée. Starting from Chamonix, the Téléphérique de l'Aiguille du Midi is taken towards the Col du Midi. The Cosmiques Hut is used to spend the night. The next day the ascent continues over Mont Blanc du Tacul and Mont Maudit.
  • The historic itinerary via the Grands Mulets Hut, or old normal route on the French side, which is most frequently traversed in winter by ski, or in summer to descend to Chamonix.
  • The normal Italian itinerary is also known as La route des Aiguilles Grises. After crossing the Miage Glacier, climbers spend the night at the Gonella refuge. The next day, one proceeds through the Col des Aiguilles Grises and the Dôme du Goûter, concluding at L'arête des Bosses (Bosses ridge).
  • The Miage – Bionnassay – Mont Blanc crossing is usually done in three days, and has been described as a truly magical expedition of ice and snow arêtes at great altitude.[36]: 199  The route begins from Contamines-Montjoie, with the night spent in the Conscrits Hut. The following day, the Dômes de Miages is crossed and the night is spent at the Durier cabin. The third day proceeds over l'Aiguille de Bionnassay and the Dôme du Goûter, finally reaching the summit of Mont Blanc via the Bosses ridge.
Aerial view of Mont Blanc from 9,000 meters above sea level, picture taken by Thomas Vautrin.
Aerial view of Mont Blanc from 9,000 meters above sea level.

Nowadays the summit is ascended by an average of 20,000 mountaineer tourists each year. It could be considered a technically easy, yet arduous ascent for someone well-trained and acclimatised to the altitude. From l'Aiguille du Midi (where the cable car stops), Mont Blanc seems quite close, being 1,000 m (3,300 ft) higher. But while the peak seems deceptively close, the La Voie des 3 Monts route (known to be more technical and challenging than other more commonly used routes) requires more ascent over two other 4,000 metres (13,000 ft) mountains, Mont Blanc du Tacul and Mont Maudit, before the final section of the climb is reached and the last 1,000 metres (3,300 ft) push to the summit is undertaken.

Each year climbing deaths occur on Mont Blanc, and on the busiest weekends, normally around August, the local rescue service performs an average of 12 missions, mostly directed to aid people in trouble on one of the normal routes of the mountain. Some routes require knowledge of high-altitude mountaineering, a guide (or at least an experienced mountaineer), and all require proper equipment. All routes are long and arduous, involving delicate passages and the hazard of rockfall or avalanche. Climbers may also suffer altitude sickness, occasionally life-threatening, particularly if they are not properly acclimatised.

Fatalities

A 1994 estimate suggests there had been 6,000 to 8,000 alpinist fatalities in total, more than on any other mountain. These numbers exclude the fatalities of Air India Flight 245 and Air India Flight 101, two planes that crashed into Mont Blanc. Despite unsubstantiated claims recurring in media that "some estimates put the fatality rate at an average of 100 hikers a year", actual reported annual numbers at least since the 1990s are between 10 and 20: in 2017, fourteen people died out of 20,000 summit attempts and two remained missing; with 15 in 2018 as of August.

A French study on the especially risky "Goûter couloir, on the normal route on Mont Blanc" and necessary rescue operations found that, between 1990 and 2011, there were 74 deaths "between the Tête Rousse refuge (3,187 m) and the Goûter refuge (3,830 m)". There were 17 more in 2012–15, none in 2016, and 11 in 2017.

Refuges

  • Refuge Vallot, 4362 m
  • Bivouac Giuseppe Lampugnani, 3860 m
  • Bivouac Marco Crippa, 3840 m
  • Refuge Goûter, 3817 m
  • Bivouac Corrado Alberico – Luigi Borgna, 3684 m
  • Refuge Cosmiques, 3613 m
  • Refuge Tête Rousse, 3167 m
  • Refuge Francesco Gonella, 3071 m
  • Refuge Grands Mulets, 3050 m

Impacts of climate change

Recent temperature rises and heatwaves, such as those of the summers of 2015 and 2018, have had significant impacts on many climbing routes across the Alps, including those on Mont Blanc. For example, in 2015, the Grand Mulets route, previously popular in the 20th century, was blocked by virtually impenetrable crevasse fields, and the Gouter Hut was closed by municipal decree for some days because of a very high rockfall danger, with some stranded climbers evacuated by helicopter.

In 2016 a crevasse opened at high altitude, also indicating previously unobserved glacial movements. The new crevasse forms an obstacle to be scaled by climbing parties on the final part of the itinerary to the top shared by the popular Goûter Route and the Grand Mulets Route.

Exploits and incidents

Aerial view of the south-eastern side of Mont Blanc, taken on a commercial flight
  • 1786: The first ascent, by Michel-Gabriel Paccard and Jacques Balmat; see Exploration of the High Alps.
  • 1787: The fourth ascent, by Englishman Mark Beaufoy, with at least six guides and a servant.
  • July 1808: The first ascent by a woman, Maria Paradis, with Balmat as her guide.
  • July 1838: The second ascent by a woman, Henriette d'Angeville.
  • 1890: Giovanni Bonin, Luigi Grasselli and Fr. Achille Ratti (later Pope Pius XI) discovered the normal Italian route (West Face Direct) on descent.
  • 1950: Air India Flight 245 crashes into Mont Blanc.
  • 1966: Air India Flight 101 crashes into Mont Blanc.
  • 1960: The airplane pilot Henri Giraud landed on the summit, which is only 30 m (98 ft) long.
  • 1990: The Swiss Pierre-André Gobet, leaving from Chamonix, completed the ascent and descent in 5 hours, 10 minutes and 14 seconds.
  • 30 May 2003: Stéphane Brosse and Pierre Gignoux tried to beat the record by ski-walking. They went up in 4 hours and 7 minutes and came back down in 1 hour and 8 minutes. In total, they did the ascent and descent in 5 hours and 15 minutes.
  • 13 August 2003: Seven French paraglider pilots landed on the summit. They reached a peak altitude of 5,200 m (17,100 ft), thanks to the hot weather conditions, which provided strong hot air currents. Five had left from Planpraz, one from Rochebrune at Megève and the last one from Samoëns.
  • 8 June 2007: Danish artist Marco Evaristti draped the peak of Mont Blanc with red fabric, along with a 20-foot (6.1 m) pole with a flag reading "Pink State". He had been arrested and detained earlier on 6 June for attempting to paint a pass leading up to the summit red. He aimed to raise awareness of environmental degradation.
  • 13 September 2007: A group of 20 people set up a hot tub at the summit.
  • 19 August 2012: Fifty paraglider pilots landed on the summit, beating the previous record of seven top landing pilots, set in 2003. This included the second ever tandem landing on the summit.
  • 11 July 2013: Kilian Jornet beat the fastest overall time for ascent and descent with 4 hours 57 minutes and 40 seconds.
  • 21 June 2018: Emelie Forsberg set a women's fastest known time up and down from Chamonix with 7 hours 53 minutes and 12 seconds, improving her previous record of 8 hours 10 minutes from 2013.

Incidents involving children

In July 2014, an American entrepreneur and traveller Patrick Sweeney attempted to break the record with his nine-year-old son and 11-year-old daughter. They were caught in an avalanche, escaped death and decided not to pursue their attempt.

In August 2014, an unknown Austrian climber with his 5-year-old son were intercepted by mountain gendarmes at 3,200 metres (10,500 ft) and forced to turn back.

On 5 August 2017, 9-year-old Hungarian twins and their mother were rescued from 3,800 metres (12,500 ft) by helicopter while their father and family friend continued their summit attempt.

Cultural references

Cinema and television

  • La Terre, son visage, is a documentary by Jean-Luc Prévost and published by Édition Société national de télévision française, released in 1984. It is part of the Haroun Tazieff raconte sa terre, vol. 1 series. In it he talks about the west–east crossing of Mont Blanc.
  • The film Malabar Princess.
  • The television-film Premier de cordée.
  • Storm over Mont Blanc (Stürme über dem Mont Blanc, 1930) with Leni Riefenstahl and directed by Arnold Fanck
  • La Roue (The Wheel, 1923) is a 273-minute film by Abel Gance depicting rail operations, workers, and families in south-eastern France, including the Mont Blanc area.

Literature

Protection

The Mont Blanc massif is being put forward as a potential World Heritage Site because of its uniqueness and its cultural importance, considered the birthplace and symbol of modern mountaineering. It would require the three governments of Italy, France and Switzerland to request UNESCO for it to be listed.

Mont Blanc is one of the most visited tourist destinations in the world, and for this reason, some view it as threatened. Pro-Mont Blanc (an international collective of associations for the protection of Mont Blanc) published in 2002 the book Le versant noir du mont Blanc (The black hillside of Mont Blanc), which exposes current and future problems in conserving the site.

In 2007, Europe's two highest toilets (at a height of 4,260 metres, 13,976 feet) were taken by helicopter to the top of Mont Blanc. They are also serviced by helicopter. They will serve 30,000 skiers and hikers annually, helping to alleviate the discharge of urine and faeces that spreads down the mountain face with the spring thaw, and turns it into 'Mont Marron'.

Global warming has begun to melt glaciers and cause avalanches on Mont Blanc, creating more dangerous climbing conditions.

Panorama

Panorama of Mont Blanc
360° panorama from Mont Blanc
 
Spherical panorama from Mont Blanc
(view as a 360° interactive panorama)
 

Entropy (information theory)

From Wikipedia, the free encyclopedia https://en.wikipedia.org/wiki/Entropy_(information_theory) In info...