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Monday, July 3, 2023

Religious syncretism

From Wikipedia, the free encyclopedia
https://en.wikipedia.org/wiki/Religious_syncretism

Religious syncretism is the blending of religious belief systems into a new system, or the incorporation of other beliefs into a religious tradition.

This can occur for many reasons, where religious traditions exist in proximity to each other, or when a culture is conquered and the conquerors bring their religious beliefs with them, but do not succeed in eradicating older beliefs and practices.

Many religions have syncretic elements, but adherents often frown upon the application of the label, especially those who belong to "revealed" religions, such as Abrahamic religions, or any system with an exclusivist approach, seeing syncretism as corrupting the original religion. Non-exclusivist systems of belief on the other hand feel freer to incorporate other traditions into their own.

Ancient history

Classical Athens was exclusive in matters of religion. Some sources assert that the Decree of Diopeithes made the introduction of and belief in foreign gods a criminal offence, and allowed only Greeks to worship in Athenian temples and festivals as foreigners were considered impure. Other sources dispute the existence of the decree.

Syncretism functioned as a feature of Hellenistic Ancient Greek religion, although only outside of Greece. Overall, Hellenistic culture in the age that followed Alexander the Great itself showed syncretist features, essentially blending of Mesopotamian, Persian, Anatolian, Egyptian (and eventually EtruscanRoman) elements within a Hellenic formula. The Egyptian god Amun developed as the Hellenized Zeus Ammon after Alexander the Great went into the desert to seek out his oracle at Siwa.

The Romans, identifying themselves as common heirs to a very similar civilization, identified Greek deities with similar figures in the Etruscan-Roman tradition, though usually without copying cult practices. (For details, see Interpretatio graeca.) Syncretic gods of the Hellenistic period also found wide favor in Rome: for example, Serapis, Isis and Mithras. Cybele as worshipped in Rome essentially represented a syncretic East Mediterranean goddess. The Romans imported the Greek god Dionysus into Rome, where he merged with the Latin mead god Liber, and converted the Anatolian Sabazios into the Roman Sabazius.

The degree of correspondence varied: Jupiter makes perhaps a better match for Zeus than the rural huntress Diana does for the feared Artemis. Ares does not quite match Mars. The Romans physically imported the Anatolian goddess Cybele into Rome from her Anatolian cult-center Pessinos in the form of her original aniconic archaic stone idol; they identified her as Magna Mater and gave her a matronly, iconic image developed in Hellenistic Pergamum.

Likewise, when the Romans encountered Celts and Germanic peoples, they mingled these peoples' gods with their own, creating Sulis Minerva, Apollo Sucellos (Apollo the Good Smiter) and Mars Thingsus (Mars of the war-assembly), among many others. In the Germania, the Roman historian Tacitus speaks of Germanic worshippers of Hercules and Mercury; most modern scholars tentatively identify Hercules as Thor and Mercury as Odin.

Romans were familiar with the concept of syncretism because from their earliest times they had experienced it with, among others, the Greeks. The Romans incorporated the originally Greek Apollo and Hercules into their religion. They did not look at the religious aspects that they adopted from other cultures to be different or less meaningful from religious aspects that were Roman in origin. The early Roman acceptance of other cultures religions into their own made it easy for them to integrate the newly encountered religions they found as a result of their expansion.

Early Christianity

Gnosticism is identified as an early form of syncretism that challenged the beliefs of early Christians.[citation needed] Gnostic dualism posited that only spiritual or invisible things were good, and that material or visible things were evil. Orthodox (mainstream) Christians have always insisted that matter is essentially good, since, as they believe, God created all things, both spiritual and material, and said that it was "very good". Simon Magus has been identified as one of the early proponents of Gnosticism.

In the first few centuries after the death of Jesus, there were various competing "Jesus movements". The Roman emperors used syncretism to help unite the expanding empire. Social conversion to Christianity happened all over Europe. It became even more effective when missionaries concurred with established cultural traditions and interlaced them into a fundamentally Christian synthesis. Sometimes old pagan gods—or at least their aspects and roles—were transferred to Christian saints, such as when Demetrius of Thessaloniki inherited the role of patron of agriculture from Demeter and the Eleusinian Mysteries after the latter's demise in the 4th century.

Syncretism is distinguished from assimilation, the latter of which refers to the Church's ability to "incorporate into herself all that is true, good, and beautiful in the world." This idea was present in the early Church; the Second Apology of Justin Martyr states: "Whatever things were rightly said among all men, are the property of us Christians". The Church has assimilated many (though not all) of the ideas of Plato and Aristotle. Augustine of Hippo is remembered for assimilating the ideas of Plato, while Thomas Aquinas is known for doing so with the ideas of Aristotle. In his essay on the development of Christian doctrine, John Henry Newman clarified the idea of assimilation.

Early Judaism

In Moses and Monotheism, Sigmund Freud made a case for Judaism arising out of the pre-existing monotheism that was briefly imposed upon Egypt during the rule of Akhenaten. The Code of Hammurabi is also cited as a likely starting point for the Jewish Ten Commandments. Some scholars hold that Judaism refined its concept of monotheism and adopted features such as its eschatology, angelology and demonology through contacts with Zoroastrianism. However, this is highly disputed among scholars.

In spite of the Jewish halakhic prohibitions on polytheism, idolatry, and associated practices (Avodah Zarah), several combinations of Judaism with other religions have sprung up: Messianic Judaism, Jewish Buddhism, Nazarenism and Judeo-Paganism. Several Jewish Messiah claimants (such as Jacob Frank) and the Sabbateans came to mix Kabbalistic Judaism with Christianity and Islam.

Post-classical history

Islam and West Asian religions

The Islamic mystical tradition known as Sufism appears somewhat syncretic in nature in its origins, but it is rejected by many other modern scholars. A better explanation is that,

"Oneness of being does not mean that the created universe is God, for God's Being is necessary while the universe's being is merely possible, that is, subject to non-being, beginning, and ending, and it is impossible that one of these two orders of being could in any sense be the other; but rather, the created universe's act of being is derived from and subsumed by the divine act of creation, from which it has no ontic independence and hence is only through the being of its Creator, the one true being. So Wahdat-al-Wujud or Oneness of Being entails that nothing exists except Allah, His attributes, His actions, and His rulings, while created being, as manifest to us, cannot be identified with His entity or attributes but only with His actions and rulings: the world, as it were, is pure act, while Allah is pure Being. In short [Wahdat-al-Wujud] is not pantheism, because the world is not Allah. Spinoza's definition in the Ethica of God as "simple substance" (pantheism properly speaking), has nothing to do with the experience of those who possess ma'rifa [gnosis]. Rather, the world's existence is through Allah, in Arabic bi Llah, the point under the Arabic letter ba' being both a point of ontic connection and a point of demarcation...The matter is between Lord (Rabb), and slave who is through Lord ('abd bi Rabb)".

Mainstream Tasawwuf does not present itself as a separate set of beliefs from the mainstream Sunni tradition; well-established traditions like Naqshbandi, Qadiri, Shadhili, and most others have always been part and parcel of normative Islamic life. No doubt some groups in the name of Sufism, just like in any religion, do espouse theologically unorthodox positions.

During Sufi presence in Bengal, Muslim–Hindu syncretism was a general trend, and Nabibangsha by Syed Sultan is an example of it. The book tells the lineage of the prophets of Islam. Apart from Adam, Noah, Abraham, Moses, and Jesus Christ, the poet also describes Indian deities such as Brahma, Vishnu, Rama and Krishna.

The Barghawata kingdom of Morocco followed a syncretic religion inspired by Islam (perhaps influenced by Judaism) with elements of Sunni, Shi'ite and Kharijite Islam, mixed with astrological and heathen traditions. Supposedly, they had their own Qur'an in the Berber language comprising 80 suras under the leadership of the second ruler of the dynasty Salih ibn Tarif who had taken part in the Maysara uprising. He proclaimed himself a prophet. He also claimed to be the final Mahdi of Islamic tradition, and that Isa (Jesus) would be his companion and pray behind him.

The Druzes integrated elements of Ismaili Islam with Gnosticism and Platonism. The Druze faith also incorporates some elements of Christianity. Satpanth is considered a syncretism of Ismaili Islam and Hinduism.

South and East Asian religions

Buddhism has syncretized with many traditional beliefs in East Asian societies as it was seen as compatible with local religions. Notable syncretization of Buddhism with local beliefs includes the Three Teachings, or Triple Religion, that harmonizes Mahayana Buddhism with Confucian philosophy and elements of Taoism, and Shinbutsu-shūgō, which is a syncretism of Shinto and Buddhism. The religious beliefs, practices, and identities of East Asians (who comprise the majority of the world's Buddhists by any measure) often blend Buddhism with other traditions including Confucianism, the Chinese folk religion, Taoism, Shinto, Korean shamanism, Vietnamese folk religion. Before and during World War II, a Nichiren Shōshū priest named Jimon Ogasawara proposed the blending of Nichiren Buddhism with Shinto.

Hinduism, Buddhism, Jainism and Zoroastrianism in ancient India have made many adaptations over the millennia, assimilating elements of various religious traditions. One example of this is the Yoga Vasistha.

Akram Vigyan Movement established by Dada Bhagwan is considered to be a Jain-Vaishnava Hindu syncretistic movement.

The Mughal emperor Akbar, who wanted to consolidate the diverse religious communities in his empire, propounded Din-i-Ilahi, a syncretic religion intended to merge the best elements of the religions of his empire, Allopanishad is the example there. Satpanth is considered a syncretism of Ismaili Islam and Hinduism.

Meivazhi is a syncretic monotheistic minority religion based in Tamil Nadu, India. Its focus is spiritual enlightenment and the conquering of death, through the teachings. Mevaizhi preaches the Oneness of essence message of all the previous major scriptures – particularly Hinduism, Buddhism, Islam, Judaism and Christianity – allowing membership regardless of creed. Meivazhi's disciples are thousands of people belonging once to 69 different castes of different religions being united as one family of Meivazhi Religion.

In China, most of the population follows syncretist religions combining Mahayana Buddhism, Taoism and elements of Confucianism. Out of all Chinese believers, approximately 85.7% adhere to Chinese traditional religion, as many profess to be both Mahayana Buddhist and Taoist at the same time. Many of the pagodas in China are dedicated to both Buddhist and Taoist deities.

Likewise, in Southeast Asia, the local variants of Buddhism have been adapted to accommodate folk beliefs, such as the veneration of nats in Myanmar and phi in Thailand. Tibetan Buddhism is also syncretic in adopting practices from the earlier Bön religion.

The traditional Mun faith of the Lepcha people predates their seventh century conversion to Lamaistic Buddhism. Since that time, the Lepcha have practiced it together with Buddhism. Since the arrival of Christian missionaries in the nineteenth century, Mun traditions have been followed alongside that faith as well. The traditional religion permits the incorporation of Buddha and Jesus Christ as deities, depending on household beliefs.

Modern history

Christianity

One can contrast Christian syncretism with contextualization or inculturation, the practice of making Christianity relevant to a culture: Contextualisation does not address the doctrine but affects a change in the styles or expression of worship. Although Christians often took their European music and building styles into churches in other parts of the world, in a contextualization approach, they would build churches, sing songs, and pray in a local ethnic style. Some Jesuit missionaries adapted local systems and images to teach Christianity, as did the Portuguese in China, the practice of which was opposed by the Dominicans, leading to the Chinese rites controversy.

Protestant Reformation

Syncretism did not play a role when Christianity split into eastern and western rites during the Great Schism. It became involved, however, with the rifts of the Protestant Reformation, with Desiderius Erasmus's readings of Plutarch. Even earlier, syncretism was a fundamental aspect of the efforts of Neoplatonists such as Marsilio Ficino to reform the teachings of the Roman Catholic Church. In 1615, David Pareus of Heidelberg urged Christians to a "pious syncretism" in opposing the Antichrist, but few 17th-century Protestants discussed the compromises that might effect a reconciliation with the Catholic Church: Johann Hülsemann, Johann Georg Dorsche, and Abraham Calovius (1612–85) opposed the Lutheran Georg Calisen "Calixtus" (1586–1656) of the University of Helmstedt for his "syncretism". (See: Syncretistic controversy.)

New World

Santa Muerte statues alongside other items of Mexican veneration (Jesus, Mary) on sale at a shop on Broadway in downtown Los Angeles.

Catholicism in Central and South America has been integrated with a number of elements derived from indigenous and slave cultures in those areas (see the Caribbean and modern sections); while many African Initiated Churches demonstrate an integration of Protestant and traditional African beliefs. The Catholic Church allows some symbols and traditions to be carried over from older belief systems, so long as they are remade to conform (rather than conflict) with a Christian worldview; syncretism of other religions with the Catholic faith, such as Voudun or Santería, is expressly condemned by the Roman Catholic Church. The image of Our Lady of Guadalupe and the subsequent devotion to her are seen as assimilating some elements of native Mexican culture into Christianity. Santa Muerte, a female deity of death, has also emerged as the combination of the indigenous goddess Mictecacihuatl and the Lady of Guadalupe. As of 2012, Santa Muerte is worshipped by approximately 5% of the Mexican population, and also has a following in the United States and parts of Central America.

Some Andean areas, such as in Peru, have a strong influence of Inca-originated Quechua culture into Catholicism. This often results in Catholic holy days and festivities featuring Quechua dances or figures, such as the Assumption of Mary celebration in Chinchaypujio, or the fertility celebrations for Pachamama in the mostly Catholic Callalli.

The Lutheran Church–Missouri Synod experienced controversy for disciplining pastors for unionism and syncretism when they participated in multi-faith services in response to the 9/11 attacks and to the shootings at Newtown, Connecticut, on the grounds that joint worship with other Christian denominations or other religious faiths implied that differences between religions are not important.

In the Latter Day Saint movement, doctrine from previous dispensations as recorded in the LDS canon are considered official, though it is accepted that ancient teachings can be warped, misunderstood, or lost as a result of apostasy. While it does not officially recognize doctrine from other religions, it is believed that truth in other sources can be identified via personal revelation.

The Lacandon people of Central America acknowledge Äkyantho', the god of foreigners. He has a son named Hesuklistos (Jesus Christ) who is supposed to be the god of the foreigners. They recognize that Hesuklistos is a god but do not feel he is worthy of worship as he is a minor god.

East Asia

Catholicism in South Korea has been syncretized with traditional Mahayana Buddhist and Confucian customs that form an integral part of traditional Korean culture. As a result, South Korean Catholics continue to practice a modified form of ancestral rites and observe many Buddhist and Confucian customs and philosophies. In Asia the revolutionary movements of Taiping (19th-century China) and God's Army (Karen in the 1990s) blended Christianity with traditional beliefs.

Mongolia

Khotons follow a syncretic form of Islam that incorporates Buddhist and traditional elements (like Tengrism).

Spain

Church of Saint Eulalia in Palma de Mallorca, centers of Xueta religious ritual life.

Xueta Christianity is a syncretic religion on the island of Majorca, Spain followed by the Xueta people, who are supposedly descendants of persecuted Jews who were converts to Christianity. Traditionally, The church of Saint Eulalia and the church of Montesión (Mount Zion) in Palma de Mallorca have been used by the families of Jewish converts (Xuetas), and both are the centers of Xueta religious ritual life. The Palma's Mont Zion Church was once the main synagogue of Palma de Mallorca. Is estimated that there are roughly 20,000 Chuetas living on the island of Majorca today, and they practiced strict endogamy by marrying only within their own group.

Italy

In Italy, especially within the Mezzogiorno, there is a syncretic Folk Catholic tradition known as Benedicaria. The origins of Benedicaria are not well known however, it could have potentially risen from the mixture between the forms of Roman Catholicism practiced by the common people and ancient Italian folk practices. Despite it being separated from mainstream Catholicism, followers still consider themselves to be devout Catholics.

Hinduism and Islam

Punjab

Census reports taken in Punjab Province during the colonial era (British India) noted and documented various practices highlighting religious syncretism among Punjabi Muslims, Punjabi Hindus, and Meo Muslims.

"In other parts of the Province, too, traces of Hindu festivals are noticeable among the Muhammadans. In the western Punjab, Baisakhi, the new year's day of the Hindus, is celebrated as an agricultural festival, by all Muhammadans, by racing bullocks yoked to the well gear, with the beat of tom-toms, and large crowds gather to witness the show, The race is called Baisakhi and is a favourite pastime in the well-irrigated tracts. Then the processions of Tazias, in Muharram, with the accompaniment of tom-toms, fencing parties and bands playing on flutes and other musical instruments (which is disapproved by the orthodox Muhammadans) and the establishment of Sabils (shelters where water and sharbat are served out) are clearly influenced by similar practices at Hindu festivals, while the illuminations on occasions like the Chiraghan fair of Shalamar (Lahore) are no doubt practices answering to the holiday-making instinct of the converted Hindus."

"Besides actual conversion, Islam has had a considerable influence on the Hindu religion. The sects of reformers based on a revolt from the orthodoxy of Varnashrama Dharma were obviously the outcome of the knowledge that a different religion could produce equally pious and right thinking men. Laxity in social restrictions also appeared simultaneously in various degrees and certain customs were assimilated to those of the Muhammadans. On the other hand the miraculous powers of Muhammadan saints were enough to attract the saint worshiping Hindus, to allegiance, if not to a total change of faith... The Shamsis are believers in Shah Shamas Tabrez of Multan, and follow the Imam, for the time being, of the Ismailia sect of Shias... they belong mostly to the Sunar caste and their connection with the sect is kept a secret, like Freemasonry. They pass as ordinary Hindus, but their devotion to the Imam is very strong."

"The Meos (Muhammadans) of the eastern Punjab still participate in the observance of the Holi and Diwali festivals. On the latter occasion they paint the horns, hoofs, etc.,of their bullocks and join in the general rejoicings".

— Excerpts from the Census of India (Punjab Province), 1911 AD

Bengal

Similar to that of Punjab, census reports conducted in British India highlighted syncretic practices among Bengali Hindus and Muslims.

"That both were originally of the same race seems sufficiently clear, not only from comparisons to physical characteristics, but from the similarity of their language, manners and customs. The Bengali Musalman is still in many respects a Hindu. Caste distinction, one of the main objects of which would seem to be to prescribe the limits of the jus connubii, are to a certain extent as prevalent and as fully recognised among the Mohammedans of Bengal,as among Hindus. As Buchanan pointed out sixty years ago, they not unfrequently meet at the same shrine, both invoking the same object of worship though perhaps under different names. Instead of commending a letter "In the name of God" (which is the orthodox fashion), the Bengali Musalman will superscribe the name of some Hindu deity. He speaks the same language, and uses precisely the same nomenclature and the same expressions of thought as his Hindu neighbor. Their very names are identical, the prefix of Shaikh alone distinguishing the convert to Islam."

— Excerpts from "The Census of Bengal", 1874 AD, Page 87

In the Sundarbans (spread across Indian state of West Bengal and Bangladesh), it is noted that Bonbibi, a guardian spirit of the forests is venerated by Hindus and Muslim residents alike. In most of the shrines of Banbibi in the Sundarbans, Banbibi is most commonly worshipped along with her brother Shah Jangali and Dakkhin Rai.

Bauls are a group of mynstric minstrels who put emphasis on their mystical elements with the tradition of music. Baul tradition is essentially an amalgamation of Vaishnavism and Sufism. Baul has had a considerable effect on Bengali culture. Baul traditions are included in the list of Masterpieces of the Oral and Intangible Heritage of Humanity.

Baháʼí Faith

The Baháʼís follow Bahá'u'lláh, a prophet whom they consider a successor to Muhammad, Jesus, Moses, Buddha, Zoroaster, Krishna and Abraham. This acceptance of other religious founders has encouraged some to regard the Baháʼí religion as a syncretic faith. However, Baháʼís and the Baháʼí literature explicitly reject this view. Baháʼís consider Bahá'u'lláh's revelation an independent, though related, revelation from God. Its relationship to previous dispensations is seen as analogous to the relationship of Christianity to Judaism. They regard beliefs held in common as evidence of truth, progressively revealed by God throughout human history, and culminating in (at present) the Baháʼí revelation. Baháʼís have their own sacred scripture, interpretations, laws and practices that, for Baháʼís, supersede those of other faiths.

Caribbean and Afro-American

Vodou altar celebrating Papa Guédé in Boston, Massachusetts, featuring offerings to Rada spirits, the Petwo family, and the Gede. In the center is a golden monstrance.

The process of syncretism in the Caribbean region often forms a part of cultural creolization. (The technical term "Creole" may apply to anyone born and raised in the region, regardless of race.) The shared histories of the Caribbean islands include long periods of European Imperialism (mainly by Spain, France, and Great Britain) and the importation of African slaves (primarily from Central and Western Africa). The influences of each of the above interacted in varying degrees on the islands, producing the fabric of society that exists today in the Caribbean.

The Rastafari movement, founded in Jamaica, syncretizes vigorously, mixing elements from the Bible, Marcus Garvey's Pan-Africanism movement, a text from the European grimoire tradition, the Sixth and Seventh Books of Moses, Hinduism, and Caribbean culture.

Another highly syncretic religion of the area, vodou, combines elements of Western African, native Caribbean, and Christian (especially Roman Catholic) beliefs.

Recently developed religious systems that exhibit marked syncretism include the African diasporic religions Candomblé, Vodou and Santería, which analogize various Yorùbá and other African deities to the Roman Catholic saints. Some sects of Candomblé have also incorporated Native American deities, and Umbanda combined African deities with Kardecist spiritualism.

Hoodoo is a similarly derived form of folk magic practiced by some African American communities in the Southern United States. Other traditions of syncretic folk religion in North America include Louisiana Voodoo as well as Pennsylvania Dutch Pow-wow, in which practitioners invoke power through the Christian God.

Other

Omnism is the belief in all religions with their gods.

Many historical Native American religious movements have incorporated Christian European influence, like the Native American Church, that teaches a combination of traditional Native American beliefs and Christianity, with sacramental use of the entheogen peyote. Further examples in North America are the Ghost Dance, and the religion of Handsome Lake.

Santo Daime is a syncretic religion founded in Brazil that incorporates elements of several religious or spiritual traditions including Folk Catholicism, Kardecist Spiritism, African animism and indigenous South American shamanism, including vegetalismo.

Unitarian Universalism also provides an example of a modern syncretic religion. It traces its roots to Universalist and Unitarian Christian congregations. However, modern Unitarian Universalism freely incorporates elements from other religious and non-religious traditions, so that it no longer identifies as "Christian."

The Theosophical Society professes to go beyond being a syncretic movement that combines deities into an elaborate Spiritual Hierarchy, and assembles evidence that points to an underlying (or occult) reality of Being that is universal and interconnected, common to all spirit-matter dualities. It is maintained that this is the source of religious belief, each religion simply casting that one reality through the prism of that particular time and in a way that is meaningful to their circumstances.

Universal Sufism seeks the unity of all people and religions. Universal Sufis strive to "realize and spread the knowledge of Unity, the religion of Love, and Wisdom, so that the biases and prejudices of faiths and beliefs may, of themselves, fall away, the human heart overflow with love, and all hatred caused by distinctions and differences be rooted out."

Cao Dai Temple: On top is Buddha, on his right Lao Tzu, on his left Confucius. Under Buddha is Li Bai. On Li Bai's right is the female Boddhisattva Guanyin, on his left is the red-faced warrior Guan Gong. Below Li Bai is Jesus, and below Jesus is Jiang Ziya.

In Vietnam, Caodaism blends elements of Buddhism, Catholicism and Taoism.

Several Japanese new religions, such as Konkokyo and Seicho-No-Ie, are syncretistic.

The Nigerian religion Chrislam combines Christian and Islamic doctrines.

In West-Central Africa, modern Bwiti incorporates animism, ancestor worship, ritual use of iboga, and Christianity into a syncretistic belief system.

Thelema is a mixture of many different schools of belief and practice, including Hermeticism, Eastern Mysticism, Yoga, 19th century libertarian philosophies (i.e. Nietzsche), occultism, and the Kabbalah, as well as ancient Egyptian and Greek religion.

Examples of strongly syncretist Romantic and modern movements with some religious elements include mysticism, occultism, Theosophical Society, modern astrology, Neopaganism, and the New Age movement.

In Réunion, the Malbars practice at same time Hinduism and Christianity. but separately, not mixed (this is called "dual religious practice" in French "double pratique religieuse") but it's not considered as syncretism

The Unification Church, founded by religious leader Sun Myung Moon in South Korea in 1954. Its teachings are based on the Bible, but include new interpretations not found in mainstream Judaism and Christianity and incorporates East Asian traditions.

Water cycle

From Wikipedia, the free encyclopedia
 
Diagram depicting the global water cycle.

The water cycle, also known as the hydrologic cycle or the hydrological cycle, is a biogeochemical cycle that describes the continuous movement of water on, above and below the surface of the Earth. The mass of water on Earth remains fairly constant over time but the partitioning of the water into the major reservoirs of ice, fresh water, saline water (salt water) and atmospheric water is variable depending on a wide range of climatic variables. The water moves from one reservoir to another, such as from river to ocean, or from the ocean to the atmosphere, by the physical processes of evaporation, transpiration, condensation, precipitation, infiltration, surface runoff, and subsurface flow. In doing so, the water goes through different forms: liquid, solid (ice) and vapor. The ocean plays a key role in the water cycle as it is the source of 86% of global evaporation.

The water cycle involves the exchange of energy, which leads to temperature changes. When water evaporates, it takes up energy from its surroundings and cools the environment. When it condenses, it releases energy and warms the environment. These heat exchanges influence climate.

The evaporative phase of the cycle purifies water which then replenishes the land with freshwater. The flow of liquid water and ice transports minerals across the globe. It is also involved in reshaping the geological features of the Earth, through processes including erosion and sedimentation. The water cycle is also essential for the maintenance of most life and ecosystems on the planet.

Description

Diagram of the water cycle

Overall process

The water cycle is powered from the energy emitted by the sun. This energy heats water in the ocean and seas. Water evaporates as water vapor into the air. Some ice and snow sublimates directly into water vapor. Evapotranspiration is water transpired from plants and evaporated from the soil. The water molecule H
2
O
has smaller molecular mass than the major components of the atmosphere, nitrogen (N
2
) and oxygen (O
2
) and hence is less dense. Due to the significant difference in density, buoyancy drives humid air higher. As altitude increases, air pressure decreases and the temperature drops (see Gas laws). The lower temperature causes water vapor to condense into tiny liquid water droplets which are heavier than the air, and which fall unless supported by an updraft. A huge concentration of these droplets over a large area in the atmosphere become visible as cloud, while condensation near ground level is referred to as fog.

Atmospheric circulation moves water vapor around the globe; cloud particles collide, grow, and fall out of the upper atmospheric layers as precipitation. Some precipitation falls as snow, hail, or sleet, and can accumulate in ice caps and glaciers, which can store frozen water for thousands of years. Most water falls as rain back into the ocean or onto land, where the water flows over the ground as surface runoff. A portion of this runoff enters rivers, with streamflow moving water towards the oceans. Runoff and water emerging from the ground (groundwater) may be stored as freshwater in lakes. Not all runoff flows into rivers; much of it soaks into the ground as infiltration. Some water infiltrates deep into the ground and replenishes aquifers, which can store freshwater for long periods of time. Some infiltration stays close to the land surface and can seep back into surface-water bodies (and the ocean) as groundwater discharge or be taken up by plants and transferred back to the atmosphere as water vapor by transpiration. Some groundwater finds openings in the land surface and emerges as freshwater springs. In river valleys and floodplains, there is often continuous water exchange between surface water and ground water in the hyporheic zone. Over time, the water returns to the ocean, to continue the water cycle.

The ocean plays a key role in the water cycle. The ocean holds "97% of the total water on the planet; 78% of global precipitation occurs over the ocean, and it is the source of 86% of global evaporation".

Processes leading to movements and phase changes in water

Important physical processes within the water cycle include the following (in alphabetical order):

  • Advection: The movement of water through the atmosphere. Without advection, water that evaporated over the oceans could not precipitate over land. Atmospheric rivers that move large volumes of water vapor over long distances are an example of advection.
  • Condensation: The transformation of water vapor to liquid water droplets in the air, creating clouds and fog.
  • Evaporation: The transformation of water from liquid to gas phases as it moves from the ground or bodies of water into the overlying atmosphere. The source of energy for evaporation is primarily solar radiation. Evaporation often implicitly includes transpiration from plants, though together they are specifically referred to as evapotranspiration. Total annual evapotranspiration amounts to approximately 505,000 km3 (121,000 cu mi) of water, 434,000 km3 (104,000 cu mi) of which evaporates from the oceans. 86% of global evaporation occurs over the ocean.
  • Infiltration: The flow of water from the ground surface into the ground. Once infiltrated, the water becomes soil moisture or groundwater. A recent global study using water stable isotopes, however, shows that not all soil moisture is equally available for groundwater recharge or for plant transpiration.
  • Percolation: Water flows vertically through the soil and rocks under the influence of gravity.
  • Precipitation: Condensed water vapor that falls to the Earth's surface. Most precipitation occurs as rain, but also includes snow, hail, fog drip, graupel, and sleet. Approximately 505,000 km3 (121,000 cu mi) of water falls as precipitation each year, 398,000 km3 (95,000 cu mi) of it over the oceans. The rain on land contains 107,000 km3 (26,000 cu mi) of water per year and a snowing only 1,000 km3 (240 cu mi). 78% of global precipitation occurs over the ocean.
  • Runoff: The variety of ways by which water moves across the land. This includes both surface runoff and channel runoff. As it flows, the water may seep into the ground, evaporate into the air, become stored in lakes or reservoirs, or be extracted for agricultural or other human uses.
  • Subsurface flow: The flow of water underground, in the vadose zone and aquifers. Subsurface water may return to the surface (e.g. as a spring or by being pumped) or eventually seep into the oceans. Water returns to the land surface at lower elevation than where it infiltrated, under the force of gravity or gravity induced pressures. Groundwater tends to move slowly and is replenished slowly, so it can remain in aquifers for thousands of years.
  • Transpiration: The release of water vapor from plants and soil into the air.

Residence times

Average reservoir residence times
Reservoir Average residence time
Antarctica 20,000 years
Oceans 3,200 years
Glaciers 20 to 100 years
Seasonal snow cover 2 to 6 months
Soil moisture 1 to 2 months
Groundwater: shallow 100 to 200 years
Groundwater: deep 10,000 years
Lakes (see lake retention time) 50 to 100 years
Rivers 2 to 6 months
Atmosphere 9 days

The residence time of a reservoir within the hydrologic cycle is the average time a water molecule will spend in that reservoir (see adjacent table). It is a measure of the average age of the water in that reservoir.

Groundwater can spend over 10,000 years beneath Earth's surface before leaving. Particularly old groundwater is called fossil water. Water stored in the soil remains there very briefly, because it is spread thinly across the Earth, and is readily lost by evaporation, transpiration, stream flow, or groundwater recharge. After evaporating, the residence time in the atmosphere is about 9 days before condensing and falling to the Earth as precipitation.

The major ice sheets – Antarctica and Greenland – store ice for very long periods. Ice from Antarctica has been reliably dated to 800,000 years before present, though the average residence time is shorter.

In hydrology, residence times can be estimated in two ways. The more common method relies on the principle of conservation of mass (water balance) and assumes the amount of water in a given reservoir is roughly constant. With this method, residence times are estimated by dividing the volume of the reservoir by the rate by which water either enters or exits the reservoir. Conceptually, this is equivalent to timing how long it would take the reservoir to become filled from empty if no water were to leave (or how long it would take the reservoir to empty from full if no water were to enter).

An alternative method to estimate residence times, which is gaining in popularity for dating groundwater, is the use of isotopic techniques. This is done in the subfield of isotope hydrology.

Water in storage

Water cycle showing human influences and major pools (storages) and fluxes.

The water cycle describes the processes that drive the movement of water throughout the hydrosphere. However, much more water is "in storage" (or in "pools") for long periods of time than is actually moving through the cycle. The storehouses for the vast majority of all water on Earth are the oceans. It is estimated that of the 1,386,000,000 km3 of the world's water supply, about 1,338,000,000 km3 is stored in oceans, or about 97%. It is also estimated that the oceans supply about 90% of the evaporated water that goes into the water cycle. The Earth's ice caps, glaciers, and permanent snowpack stores another 24,064,000 km3 accounting for only 1.7% of the planet's total water volume. However, this quantity of water is 68.7% of all freshwater on the planet.

Changes caused by humans

Extreme weather (heavy rains, droughts, heat waves) is one consequence of a changing water cycle due to global warming. These events will be progressively more common as the Earth warms more and more.
 
Predicted changes in average soil moisture for a scenario of 2°C global warming. This can disrupt agriculture and ecosystems. A reduction in soil moisture by one standard deviation means that average soil moisture will approximately match the ninth driest year between 1850 and 1900 at that location.

Water cycle intensification due to climate change

Since the middle of the 20th century, human-caused climate change has resulted in observable changes in the global water cycle. The IPCC Sixth Assessment Report in 2021 predicted that these changes will continue to grow significantly at the global and regional level. These findings are a continuation of scientific consensus expressed in the IPCC Fifth Assessment Report from 2007 and other special reports by the Intergovernmental Panel on Climate Change which had already stated that the water cycle will continue to intensify throughout the 21st century.

The effects of climate change on the water cycle are profound and have been described as an intensification or a strengthening of the water cycle (also called hydrologic cycle). This effect has been observed since at least 1980. One example is the intensification of heavy precipitation events. This has important negative effects on the availability of freshwater resources, as well as other water reservoirs such as oceans, ice sheets, atmosphere and land surface. The water cycle is essential to life on Earth and plays a large role in the global climate and the ocean circulation. The warming of our planet is expected to cause changes in the water cycle for various reasons. For example, warmer atmosphere can contain more water vapor which has effects on evaporation and rainfall. Oceans play a large role as well, since they absorb 93% of heat. The increase in ocean heat content since 1971 has a big effect on the ocean as well as the water cycle.

The underlying cause of the intensifying water cycle is the increased amount of greenhouse gases, which lead to a warmer atmosphere through the greenhouse effect. Physics dictates that saturation vapor pressure increases by 7% when temperature rises by 1 °C (as described in the Clausius-Clapeyron equation).

The strength of the water cycle and its changes over time are of considerable interest, especially as the climate changes. The essence of the overall hydrological cycle is the evaporation of moisture in one place and the precipitation in other places. In particular, evaporation exceeds precipitation over the oceans, which allows moisture to be transported by the atmosphere from the oceans onto land where precipitation exceeds evapotranspiration, and the runoff flows into streams and rivers and discharges into the ocean, completing the cycle. The water cycle is a key part of Earth's energy cycle through the evaporative cooling at the surface which provides latent heat to the atmosphere, as atmospheric systems play a primary role in moving heat upward.

Changes due to other human activities

Relationship between impervious surfaces and surface runoff

Human activities, other than those that lead to global warming from greenhouse gas emissions, can also alter the water cycle. The IPCC Sixth Assessment Report stated that there is "abundant evidence that changes in land use and land cover alter the water cycle globally, regionally and locally, by changing precipitation, evaporation, flooding, groundwater, and the availability of freshwater for a variety of uses".

Examples for such land use changes are converting fields to urban areas or clearing forests. Such changes can affect the ability of soils to soak up surface water. Deforestation has local as well as regional effects. For example it reduces soil moisture, evaporation and rainfall at the local level. Furthermore, deforestation causes regional temperature changes that can affect rainfall patterns.

Aquifer drawdown or overdrafting and the pumping of fossil water increase the total amount of water in the hydrosphere. This is because the water that was originally in the ground has now become available for evaporation as it is now in contact with the atmosphere.

Related processes

Biogeochemical cycling

While the water cycle is itself a biogeochemical cycle, flow of water over and beneath the Earth is a key component of the cycling of other biogeochemicals. Runoff is responsible for almost all of the transport of eroded sediment and phosphorus from land to waterbodies. The salinity of the oceans is derived from erosion and transport of dissolved salts from the land. Cultural eutrophication of lakes is primarily due to phosphorus, applied in excess to agricultural fields in fertilizers, and then transported overland and down rivers. Both runoff and groundwater flow play significant roles in transporting nitrogen from the land to waterbodies. The dead zone at the outlet of the Mississippi River is a consequence of nitrates from fertilizer being carried off agricultural fields and funnelled down the river system to the Gulf of Mexico. Runoff also plays a part in the carbon cycle, again through the transport of eroded rock and soil.

Slow loss over geologic time

The hydrodynamic wind within the upper portion of a planet's atmosphere allows light chemical elements such as Hydrogen to move up to the exobase, the lower limit of the exosphere, where the gases can then reach escape velocity, entering outer space without impacting other particles of gas. This type of gas loss from a planet into space is known as planetary wind. Planets with hot lower atmospheres could result in humid upper atmospheres that accelerate the loss of hydrogen.

Historical interpretations

Floating land mass

In ancient times, it was widely thought that the land mass floated on a body of water, and that most of the water in rivers has its origin under the earth. Examples of this belief can be found in the works of Homer (circa 800 BCE).

Hebrew Bible

In the ancient Near East, Hebrew scholars observed that even though the rivers ran into the sea, the sea never became full. Some scholars conclude that the water cycle was described completely during this time in this passage: "The wind goeth toward the south, and turneth about unto the north; it whirleth about continually, and the wind returneth again according to its circuits. All the rivers run into the sea, yet the sea is not full; unto the place from whence the rivers come, thither they return again" (Ecclesiastes 1:6-7). Scholars are not in agreement as to the date of Ecclesiastes, though most scholars point to a date during the time of King Solomon, son of David and Bathsheba, "three thousand years ago, there is some agreement that the time period is 962–922 BCE. Furthermore, it was also observed that when the clouds were full, they emptied rain on the earth (Ecclesiastes 11:3). In addition, during 793–740 BCE a Hebrew prophet, Amos, stated that water comes from the sea and is poured out on the earth (Amos 5:8).

In the Biblical Book of Job, dated between 7th and 2nd centuries BCE, there is a description of precipitation in the hydrologic cycle, "For he maketh small the drops of water: they pour down rain according to the vapour thereof; which the clouds do drop and distil upon man abundantly" (Job 36:27-28).

Understanding of precipitation and percolation

In the Adityahridayam (a devotional hymn to the Sun God) of Ramayana, a Hindu epic dated to the 4th century BCE, it is mentioned in the 22nd verse that the Sun heats up water and sends it down as rain. By roughly 500 BCE, Greek scholars were speculating that much of the water in rivers can be attributed to rain. The origin of rain was also known by then. These scholars maintained the belief, however, that water rising up through the earth contributed a great deal to rivers. Examples of this thinking included Anaximander (570 BCE) (who also speculated about the evolution of land animals from fish) and Xenophanes of Colophon (530 BCE). Chinese scholars such as Chi Ni Tzu (320 BCE) and Lu Shih Ch'un Ch'iu (239 BCE) had similar thoughts.

The idea that the water cycle is a closed cycle can be found in the works of Anaxagoras of Clazomenae (460 BCE) and Diogenes of Apollonia (460 BCE). Both Plato (390 BCE) and Aristotle (350 BCE) speculated about percolation as part of the water cycle. Aristotle correctly hypothesized that the sun played a role in the Earth's hydraulic cycle in his book Meteorology, writing "By it [the sun's] agency the finest and sweetest water is everyday carried up and is dissolved into vapor and rises to the upper regions, where it is condensed again by the cold and so returns to the earth.", and believed that clouds were composed of cooled and condensed water vapor.

Up to the time of the Renaissance, it was wrongly assumed that precipitation alone was insufficient to feed rivers, for a complete water cycle, and that underground water pushing upwards from the oceans were the main contributors to river water. Bartholomew of England held this view (1240 CE), as did Leonardo da Vinci (1500 CE) and Athanasius Kircher (1644 CE).

Discovery of the correct theory

The first published thinker to assert that rainfall alone was sufficient for the maintenance of rivers was Bernard Palissy (1580 CE), who is often credited as the discoverer of the modern theory of the water cycle. Palissy's theories were not tested scientifically until 1674, in a study commonly attributed to Pierre Perrault. Even then, these beliefs were not accepted in mainstream science until the early nineteenth century.

Introduction to entropy

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