1. El Nino Worksheet Pdf
2. 2019 El Nino
3. El Nino Wikipedia
4. El Nino Forming 2018

Surface observations and subsurface ocean assimilation datasets are examined to contrast two distinct types of El Nino-Southern Oscillation (ENSO) in the tropical Pacific: an eastern-Pacific (EP. El Nino is the powerful climate change that occurs about every two to seven years. Water near the equator warms up to a higher temperature, which causes the air above it to warm up too. This warmer air and water moves east. El Nino can cause wild weather on the west coast.

• El Nino is the powerful climate change that occurs about every two to seven years. Water near the equator warms up to a higher temperature, which causes the air above it to warm up too. This warmer air and water moves east. El Nino can cause wild weather on the west coast.
• El Nino and Indian monsoon are inversely related. The most prominent droughts in India – six of them – since 1871 have been El Nino droughts, including the recent ones in 2002 and 2009; However, not all El Nino years led to a drought in India. For instance, 1997/98 was a strong El Nino year but there was no drought (Because of IOD).
• El Nino is the situation wherein people experience drought and sometimes flooding. To protect themselves, people must have abundant supply of potable water and source of food.

El Niño (/ɛlˈniːn.joʊ/; Spanish: [el ˈniɲo]) is the warm phase of the El Niño–Southern Oscillation (ENSO) and is associated with a band of warm ocean water that develops in the central and east-central equatorial Pacific (between approximately the International Date Line and 120°W), including the area off the Pacific coast of South America. The ENSO is the cycle of warm and cold sea surface temperature (SST) of the tropical central and eastern Pacific Ocean. El Niño is accompanied by high air pressure in the western Pacific and low air pressure in the eastern Pacific. El Niño phases are known to occur close to four years, however, records demonstrate that the cycles have lasted between two and seven years. During the development of El Niño, rainfall develops between September–November.^[1] The cool phase of ENSO is La Niña, with SSTs in the eastern Pacific below average, and air pressure high in the eastern Pacific and low in the western Pacific. The ENSO cycle, including both El Niño and La Niña, causes global changes in temperature and rainfall.^[2][3]

Developing countries that depend on their own agriculture and fishing, particularly those bordering the Pacific Ocean, are usually most affected. In American Spanish, the capitalized term El Niño means 'the boy'. In this phase of the Oscillation, the pool of warm water in the Pacific near South America is often at its warmest about Christmas.^[4] The original name of the phase, El Niño de Navidad, arose centuries ago, when Peruvian fishermen named the weather phenomenon after the newborn Christ.^[5][6]La Niña, chosen as the 'opposite' of El Niño, is American Spanish for 'the girl'.

• 5Effects on the global climate
• 6Regional impacts
• 7Effects on humanity

Concept[edit]

Originally, the term El Niño applied to an annual weak warm ocean current that ran southwards along the coast of Peru and Ecuador at about Christmas time.^[7] However, over time the term has evolved and now refers to the warm and negative phase of the El Niño–Southern Oscillation and is the warming of the ocean surface or above-average sea surface temperatures in either the central and eastern tropical Pacific Ocean.^[8][9] This warming causes a shift in the atmospheric circulation with rainfall becoming reduced over Indonesia and Australia, while rainfall and tropical cyclone formation increases over the tropical Pacific Ocean.^[10] The low-level surface trade winds, which normally blow from east to west along the equator, either weaken or start blowing from the other direction.^[9]

Historically, El Niño events are thought to have been occurring for thousands of years.^[11] For example, it is thought that El Niño affected the Moche in modern-day Peru, who sacrificed humans in order to try to prevent the rains. Scientists have also found the chemical signatures of warmer sea surface temperatures and increased rainfall caused by El Niño in coral specimens that are around 13,000 years old.^[12] In around 1525 when Francisco Pizarro made landfall on Peru, he noted rainfall occurring in the deserts which subsequently became the first written record of the impacts of El Niño.^[12] Modern day research and reanalysis techniques have managed to find at least 26 El Niño events since 1900, with the 1982–83, 1997–98 and 2014–16 events among the strongest on record.^[13][14][15]

Currently, each country has a different threshold for what constitutes an El Niño event, which is tailored to their specific interests.^[16] For example, the Australian Bureau of Meteorology looks at the trade winds, SOI, weather models and sea surface temperatures in the Nino 3 and 3.4 regions, before declaring an El Niño.^[17] The United States Climate Prediction Center (CPC) and the International Research Institute for Climate and Society (IRI) looks at the sea surface temperatures in the Niño 3.4 region, the tropical Pacific atmosphere and forecasts that NOAA's Oceanic Niño Index will equal or exceed +.5 °C (0.90 °F) for several seasons in a row.^[18] However, the Japan Meteorological Agency declares that an El Niño event has started when the average five month sea surface temperature deviation for the NINO.3 region, is over 0.5 °C (0.90 °F) warmer for six consecutive months or longer.^[19] The Peruvian government declares that a coastal El Niño is under way if the sea surface temperatures in the Niño 1 and 2 regions equal or exceed +.4 °C (0.72 °F) for at least three months.

There is no consensus on if climate change will have any influence on the occurrence, strength or duration of El Niño events, as research supports El Niño events becoming stronger, longer, shorter and weaker.^[20][21]

Occurrences[edit]

A timeline of all the El Niño episodes between 1900 and 2019.^[13][14]

El Niño events are thought to have been occurring for thousands of years.^[11] For example, it is thought that El Niño affected the Moche in modern-day Peru, who sacrificed humans in order to try to prevent the rains.^[22]

It is thought that there have been at least 30 El Niño events since 1900, with the 1982–83, 1997–98 and 2014–16 events among the strongest on record.^[13][14] Since 2000, El Niño events have been observed in 2002–03, 2004–05, 2006–07, 2009–10, 2014–16,^[13] and 2018–19.^[23][24]

Major ENSO events were recorded in the years 1790–93, 1828, 1876–78, 1891, 1925–26, 1972–73, 1982–83, 1997–98, and 2014–16.^[25][26][27]

Typically, this anomaly happens at irregular intervals of two to seven years, and lasts nine months to two years.^[28] The average period length is five years. When this warming occurs for seven to nine months, it is classified as El Niño 'conditions'; when its duration is longer, it is classified as an El Niño 'episode'.^[29]

There is no consensus on whether climate change will have any influence on the occurrence, strength or duration of El Niño events, as research supports El Niño events becoming stronger, longer, shorter and weaker.^[20][21]

During strong El Niño episodes, a secondary peak in sea surface temperature across the far eastern equatorial Pacific Ocean sometimes follows the initial peak.^[30]

Cultural history and prehistoric information[edit]

ENSO conditions have occurred at two- to seven-year intervals for at least the past 300 years, but most of them have been weak. Evidence is also strong for El Niño events during the early Holocene epoch 10,000 years ago.^[31]

El Niño may have led to the demise of the Moche and other pre-Columbian Peruvian cultures.^[32] A recent study suggests a strong El-Niño effect between 1789 and 1793 caused poor crop yields in Europe, which in turn helped touch off the French Revolution.^[33] The extreme weather produced by El Niño in 1876–77 gave rise to the most deadly famines of the 19th century.^[34] The 1876 famine alone in northern China killed up to 13 million people.^[35]

An early recorded mention of the term 'El Niño' to refer to climate occurred in 1892, when Captain Camilo Carrillo told the geographical society congress in Lima that Peruvian sailors named the warm south-flowing current 'El Niño' because it was most noticeable around Christmas.^[36] The phenomenon had long been of interest because of its effects on the guano industry and other enterprises that depend on biological productivity of the sea. It is recorded that as early as 1822, cartographer Joseph Lartigue, of the French frigate La Clorinde under Baron Mackau, noted the 'counter-current' and its usefulness for traveling southward along the Peruvian coast.^[37][38][39]

Charles Todd, in 1888, suggested droughts in India and Australia tended to occur at the same time;^[40]Norman Lockyer noted the same in 1904.^[41] An El Niño connection with flooding was reported in 1894 by Víctor Eguiguren [es] (1852–1919) and in 1895 by Federico Alfonso Pezet (1859–1929).^[42][38][43] In 1924, Gilbert Walker (for whom the Walker circulation is named) coined the term 'Southern Oscillation'.^[44] He and others (including Norwegian-American meteorologist Jacob Bjerknes) are generally credited with identifying the El Niño effect.^[45]

The major 1982–83 El Niño led to an upsurge of interest from the scientific community. The period 1991–95 was unusual in that El Niños have rarely occurred in such rapid succession.^[46] An especially intense El Niño event in 1998 caused an estimated 16% of the world's reef systems to die. The event temporarily warmed air temperature by 1.5 °C, compared to the usual increase of 0.25 °C associated with El Niño events.^[47] Since then, mass coral bleaching has become common worldwide, with all regions having suffered 'severe bleaching'.^[48]

Diversity[edit]

It is thought that there are several different types of El Niño events, with the canonical eastern Pacific and the Modoki central Pacific types being the two that receive the most attention.^[49][50][51] These different types of El Niño events are classified by where the tropical Pacific sea surface temperature (SST) anomalies are the largest.^[51] For example, the strongest sea surface temperature anomalies associated with the canonical eastern Pacific event are located off the coast of South America.^[51] The strongest anomalies associated with the Modoki central Pacific event are located near the International Date Line.^[51] However, during the duration of a single event, the area with the greatest sea surface temperature anomalies can change.^[51]

The traditional Niño, also called Eastern Pacific (EP) El Niño,^[52] involves temperature anomalies in the Eastern Pacific. However, in the last two decades, nontraditional El Niños were observed, in which the usual place of the temperature anomaly (Niño 1 and 2) is not affected, but an anomaly arises in the central Pacific (Niño 3.4).^[53] The phenomenon is called Central Pacific (CP) El Niño,^[52] 'dateline' El Niño (because the anomaly arises near the International Date Line), or El Niño 'Modoki' (Modoki is Japanese for 'similar, but different').^{[54][55][56][57]}

The effects of the CP El Niño are different from those of the traditional EP El Niño—e.g., the recently discovered El Niño leads to more hurricanes more frequently making landfall in the Atlantic.^[58]

There is also a scientific debate on the very existence of this 'new' ENSO. Indeed, a number of studies dispute the reality of this statistical distinction or its increasing occurrence, or both, either arguing the reliable record is too short to detect such a distinction,^[59][60] finding no distinction or trend using other statistical approaches,^{[61][62][63][64][65]} or that other types should be distinguished, such as standard and extreme ENSO.^[66][67]

The first recorded El Niño that originated in the central Pacific and moved toward the east was in 1986.^[68] Recent Central Pacific El Niños happened in 1986–87, 1991–92, 1994–95, 2002–03, 2004–05 and 2009–10.^[69] Furthermore, there were 'Modoki' events in 1957–59,^[70] 1963–64, 1965–66, 1968–70, 1977–78 and 1979–80.^[71][72] Some sources say that the El Niños of 2006-07 and 2014-16 were also Central Pacific El Niños.^[73][74]

Effects on the global climate[edit]

El Nino affects the global climate and disrupts normal weather patterns, which as a result can lead to intense storms in some places and droughts in others.^[75][76]

Tropical cyclones[edit]

Most tropical cyclones form on the side of the subtropical ridge closer to the equator, then move poleward past the ridge axis before recurving into the main belt of the Westerlies.^[77] Areas west of Japan and Korea tend to experience much fewer September–November tropical cyclone impacts during El Niño and neutral years. During El Niño years, the break in the subtropical ridge tends to lie near 130°E, which would favor the Japanese archipelago.^[78]

Within the Atlantic Ocean vertical wind shear is increased, which inhibits tropical cyclone genesis and intensification, by causing the westerly winds in the atmosphere to be stronger.^[79] The atmosphere over the Atlantic Ocean can also be drier and more stable during El Niño events, which can also inhibit tropical cyclone genesis and intensification.^[79] Within the Eastern Pacific basin: El Niño events contribute to decreased easterly vertical wind shear and favours above-normal hurricane activity.^[80] However, the impacts of the ENSO state in this region can vary and are strongly influenced by background climate patterns.^[80] The Western Pacific basin experiences a change in the location of where tropical cyclones form during El Niño events, with tropical cyclone formation shifting eastward, without a major change in how many develop each year.^[79] As a result of this change, Micronesia is more likely to be affected by tropical cyclones, while China has a decreased risk of being affected by tropical cyclones.^[78] A change in the location of where tropical cyclones form also occurs within the Southern Pacific Ocean between 135°E and 120°W, with tropical cyclones more likely to occur within the Southern Pacific basin than the Australian region.^[10][79] As a result of this change tropical cyclones are 50% less likely to make landfall on Queensland, while the risk of a tropical cyclone is elevated for island nations like Niue, French Polynesia, Tonga, Tuvalu, and the Cook Islands.^[10][81][82]

Remote influence on tropical Atlantic Ocean[edit]

A study of climate records has shown that El Niño events in the equatorial Pacific are generally associated with a warm tropical North Atlantic in the following spring and summer.^[83] About half of El Niño events persist sufficiently into the spring months for the Western Hemisphere Warm Pool to become unusually large in summer.^[84] Occasionally, El Niño's effect on the Atlantic Walker circulation over South America strengthens the easterly trade winds in the western equatorial Atlantic region. As a result, an unusual cooling may occur in the eastern equatorial Atlantic in spring and summer following El Niño peaks in winter.^[85] Cases of El Niño-type events in both oceans simultaneously have been linked to severe famines related to the extended failure of monsoon rains.^[25]

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Regional impacts[edit]

Observations of El Niño events since 1950, show that impacts associated with El Niño events depend on what season it is.^[86] However, while certain events and impacts are expected to occur during events, it is not certain or guaranteed that they will occur.^[86] The impacts that generally do occur during most El Niño events include below-average rainfall over Indonesia and northern South America, while above average rainfall occurs in southeastern South America, eastern equatorial Africa, and the southern United States.^[86]

Africa[edit]

In Africa, East Africa—including Kenya, Tanzania, and the White Nile basin—experiences, in the long rains from March to May, wetter-than-normal conditions. Conditions are also drier than normal from December to February in south-central Africa, mainly in Zambia, Zimbabwe, Mozambique, and Botswana.

Antarctica[edit]

Many ENSO linkages exist in the high southern latitudes around Antarctica.^[87] Specifically, El Niño conditions result in high-pressure anomalies over the Amundsen and Bellingshausen Seas, causing reduced sea ice and increased poleward heat fluxes in these sectors, as well as the Ross Sea. The Weddell Sea, conversely, tends to become colder with more sea ice during El Niño. The exact opposite heating and atmospheric pressure anomalies occur during La Niña.^[88] This pattern of variability is known as the Antarctic dipole mode, although the Antarctic response to ENSO forcing is not ubiquitous.^[88]

Asia[edit]

As warm water spreads from the west Pacific and the Indian Ocean to the east Pacific, it takes the rain with it, causing extensive drought in the western Pacific and rainfall in the normally dry eastern Pacific. Singapore experienced the driest February in 2014 since records began in 1869, with only 6.3 mm of rain falling in the month and temperatures hitting as high as 35 °C on 26 February. The years 1968 and 2005 had the next driest Februaries, when 8.4 mm of rain fell. ^[89]

Australia and the Southern Pacific[edit]

During El Niño events, the shift in rainfall away from the Western Pacific may mean that rainfall across Australia is reduced.^[10] Over the southern part of the continent, warmer than average temperatures can be recorded as weather systems are more mobile and fewer blocking areas of high pressure occur.^[10] The onset of the Indo-Australian Monsoon in tropical Australia is delayed by two to six weeks, which as a consequence means that rainfall is reduced over the northern tropics.^[10] The risk of a significant bushfire season in south-eastern Australia is higher following an El Niño event, especially when it is combined with a positive Indian Ocean Dipole event.^[10] During an El Niño event, New Zealand tends to experience stronger or more frequent westerly winds during their summer, which leads to an elevated risk of drier than normal conditions along the east coast.^[90] There is more rain than usual though on New Zealand's West Coast, because of the barrier effect of the North Island mountain ranges and the Southern Alps.^[90]

Fiji generally experiences drier than normal conditions during an El Niño, which can lead to drought becoming established over the Islands.^[91] However, the main impacts on the island nation is felt about a year after the event becomes established.^[91] Within the Samoan Islands, below average rainfall and higher than normal temperatures are recorded during El Niño events, which can lead to droughts and forest fires on the islands.^[92] Other impacts include a decrease in the sea level, possibility of coral bleaching in the marine environment and an increased risk of a tropical cyclone affecting Samoa.^[92]

Europe[edit]

El Niño's effects on Europe are controversial, complex and difficult to analyse, as it is one of several factors that influence the weather over the continent and other factors can overwhelm the signal.^[93][94]

North America[edit]

El Nino Worksheet Pdf

Over North America, the main temperature and precipitation impacts of El Niño, generally occur in the six months between October and March.^[95][96] In particular the majority of Canada generally has milder than normal winters and springs, with the exception of eastern Canada where no significant impacts occur.^[97] Within the United States, the impacts generally observed during the six-month period include; wetter-than-average conditions along the Gulf Coast between Texas and Florida, while drier conditions are observed in Hawaii, the Ohio Valley, Pacific Northwest and the Rocky Mountains.^[95] Over California and the southwestern United States, there is a weak relationship between El Nino and above-average precipitation, as it strongly depends on the strength of the El Niño event and other factors.^[95]

The synoptic condition for the Tehuano wind, or 'Tehuantepecer', is associated with a high-pressure area forming in Sierra Madre of Mexico in the wake of an advancing cold front, which causes winds to accelerate through the Isthmus of Tehuantepec. Tehuantepecers primarily occur during the cold season months for the region in the wake of cold fronts, between October and February, with a summer maximum in July caused by the westward extension of the Azores High. Wind magnitude is greater during El Niño years than during La Niña years, due to the more frequent cold frontal incursions during El Niño winters.^[98] Its effects can last from a few hours to six days.^[99] Some El Niño events were recorded in the isotope signals of plants, and that had helped centifics to study his impact.^[100]

South America[edit]

Because El Niño's warm pool feeds thunderstorms above, it creates increased rainfall across the east-central and eastern Pacific Ocean, including several portions of the South American west coast. The effects of El Niño in South America are direct and stronger than in North America. An El Niño is associated with warm and very wet weather months in April–October along the coasts of northern Peru and Ecuador, causing major flooding whenever the event is strong or extreme.^[101] The effects during the months of February, March, and April may become critical along the west coast of South America, El Niño reduces the upwelling of cold, nutrient-rich water that sustains large fish populations, which in turn sustain abundant sea birds, whose droppings support the fertilizer industry. The reduction in upwelling leads to fish kills off the shore of Peru.^[102]

The local fishing industry along the affected coastline can suffer during long-lasting El Niño events. The world's largest fishery collapsed due to overfishing during the 1972 El Niño Peruvian anchoveta reduction. During the 1982–83 event, jack mackerel and anchoveta populations were reduced, scallops increased in warmer water, but hake followed cooler water down the continental slope, while shrimp and sardines moved southward, so some catches decreased while others increased.^[103]Horse mackerel have increased in the region during warm events. Shifting locations and types of fish due to changing conditions provide challenges for fishing industries. Peruvian sardines have moved during El Niño events to Chilean areas. Other conditions provide further complications, such as the government of Chile in 1991 creating restrictions on the fishing areas for self-employed fishermen and industrial fleets.^{[citation needed]}

The ENSO variability may contribute to the great success of small, fast-growing species along the Peruvian coast, as periods of low population removes predators in the area. Similar effects benefit migratory birds that travel each spring from predator-rich tropical areas to distant winter-stressed nesting areas.^{[citation needed]}

2019 El Nino

Southern Brazil and northern Argentina also experience wetter than normal conditions, but mainly during the spring and early summer. Central Chile receives a mild winter with large rainfall, and the Peruvian-Bolivian Altiplano is sometimes exposed to unusual winter snowfall events. Drier and hotter weather occurs in parts of the Amazon River Basin, Colombia, and Central America.^{[citation needed]}

Effects on humanity[edit]

Economic effect[edit]

When El Niño conditions last for many months, extensive ocean warming and the reduction in easterly trade winds limits upwelling of cold nutrient-rich deep water, and its economic effect on local fishing for an international market can be serious.^[102]

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More generally, El Niño can affect commodity prices and the macroeconomy of different countries. It can constrain the supply of rain-driven agricultural commodities; reduce agricultural output, construction, and services activities; create food-price and generalised inflation; and may trigger social unrest in commodity-dependent poor countries that primarily rely on imported food.^[104] A University of Cambridge Working Paper shows that while Australia, Chile, Indonesia, India, Japan, New Zealand and South Africa face a short-lived fall in economic activity in response to an El Niño shock, other countries may actually benefit from an El Niño weather shock (either directly or indirectly through positive spillovers from major trading partners), for instance, Argentina, Canada, Mexico and the United States. Furthermore, most countries experience short-run inflationary pressures following an El Niño shock, while global energy and non-fuel commodity prices increase.^[105] The IMF estimates a significant El Niño can boost the GDP of the United States by about 0.5% (due largely to lower heating bills) and reduce the GDP of Indonesia by about 1.0%.^[106]

Health and social effects[edit]

Extreme weather conditions related to the El Niño cycle correlate with changes in the incidence of epidemic diseases. For example, the El Niño cycle is associated with increased risks of some of the diseases transmitted by mosquitoes, such as malaria, dengue fever, and Rift Valley fever^[107]. Cycles of malaria in India, Venezuela, Brazil, and Colombia have now been linked to El Niño. Outbreaks of another mosquito-transmitted disease, Australian encephalitis (Murray Valley encephalitis—MVE), occur in temperate south-east Australia after heavy rainfall and flooding, which are associated with La Niña events. A severe outbreak of Rift Valley fever occurred after extreme rainfall in north-eastern Kenya and southern Somalia during the 1997–98 El Niño.^[108]

ENSO conditions have also been related to Kawasaki disease incidence in Japan and the west coast of the United States,^[109] via the linkage to tropospheric winds across the north Pacific Ocean.^[110]

ENSO may be linked to civil conflicts. Scientists at The Earth Institute of Columbia University, having analyzed data from 1950 to 2004, suggest ENSO may have had a role in 21% of all civil conflicts since 1950, with the risk of annual civil conflict doubling from 3% to 6% in countries affected by ENSO during El Niño years relative to La Niña years.^[111][112]

References[edit]

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Further reading[edit]

• Caviedes, César N. (2001). El Niño in History: Storming Through the Ages. Gainesville: University Press of Florida. ISBN978-0-8130-2099-0.
• Fagan, Brian M. (1999). Floods, Famines, and Emperors: El Niño and the Fate of Civilizations. New York: Basic Books. ISBN978-0-7126-6478-3.
• Glantz, Michael H. (2001). Currents of change. Cambridge: Cambridge University Press. ISBN978-0-521-78672-0.
• Philander, S. George (1990). El Niño, La Niña and the Southern Oscillation. San Diego: Academic Press. ISBN978-0-12-553235-8.
• Kuenzer, C.; Zhao, D.; Scipal, K.; Sabel, D.; Naeimi, V.; Bartalis, Z.; Hasenauer, S.; Mehl, H.; Dech, S.; Waganer, W. (2009). 'El Niño southern oscillation influences represented in ERS scatterometer-derived soil moisture data'. Applied Geography. 29 (4): 463–477. doi:10.1016/j.apgeog.2009.04.004.
• Li, J.; Xie, S.-P.; Cook, E.R.; Morales, M.; Christie, D.; Johnson, N.; Chen, F.; d’Arrigo, R.; Fowler, A.; Gou, X.; Fang, K. (2013). 'El Niño modulations over the past seven centuries'(PDF). Nature Climate Change. 3 (9): 822–826. Bibcode:2013NatCC..3.822L. doi:10.1038/nclimate1936.

External links[edit]

• Latest El Niño/La Niña Watch Data from NASA JPL's Ocean Surface Topography Mission
• El Niño and La Niña from the 1999 International Red Cross World Disasters Report by Eric J. Lyman.
• El Niño Theme Page A comprehensive resource
• Current Operational SST Anomaly Charts - OSPO - NOAA OSPO^{[permanent dead link]}

El Nino Wikipedia

El Niño is a weather phenomena which tends to occur in tropicalwaters of the Pacific Ocean. It affects the region across thePacific from New Guinea to South America. During an El Niño season,which occurs on average every 2-7 years, a shift in ocean currentsand winds brings warm water in a westerly direction, displacing theusual cold water that comes up from the ocean depths. As well asaffecting marine life, the El Niño has an effect on weatherpatterns. Under normal conditions, in the tropics warm oceans tendto be accompanied by heavy rains, resulting in heavy rains in thewarm west Pacific while the cooler east Pacific receives far lessrainfall. This is reversed during an El Niño, when the oceantemperature gradient from one side of the Pacific to the otherweakens. Warmer than usual ocean temperatures cause droughts in thewest, while the unusually warm eastern waters bring heavy rains andfloods to the Pacific coast of South America, which is usually muchdrier. It's all a matter of interactions between the oceans and theatmosphere. Changes in sea surface temperatures causes a shift inair pressure which, in turn, can result in climatic anomalies, suchas severe droughts, flooding and even cyclones. One of the effectsis that the normal circulation patterns over the Pacific aredisrupted, and moisture-bearing trade winds weaken, whilst drierwesterlies increase.

Can El Nino could be a possible solution to California's drought or be the cause of the drought?

El Niño brings increased precipitation to California, which will at least ease the drought.

Which is expected to happen during el nino?

The pressure gradient decreases. drought conditions in Australia

What do people do to protect themselves when el nino is about to occur?

El Nino is the situation wherein people experience drought and sometimes flooding. To protect themselves, people must have abundant supply of potable water and source of food.

Does El Nino cause more Atlantic Hurricanes?

No. El Nino increases wind shear over the Atlantic, which leads to fewer hurricanes.

El Nino Forming 2018

What is synonym of el nino?

The opposite may be like a drought or similar a summer monsoon that causes rain and a winter monsoon which causes drought so there are some differences and similarity's

What happens to rainfall in Australia and off the coast of Peru during an El nino?

Along the coast of Peru, El Nino generally brings wet weather during December-February and above-normal temperatures throughout the year (as long as the El Nino exists). In Australia, El Nino means dry, and drought is not uncommon during these episodes, particularly in northern and eastern areas. El Nino has less effect on the southwestern quarter of the continent. In addition, El Nino summers (December-February) tend to be hotter than normal in Tasmania and nearby southeastern…

How does El Nino affect the ecosystem?

El Nino can be the cause of fish and other marine life leaving their home due to the lack of water in the affected area. El Nino also causes dramatic temperature fluctuations in the water.

Does el nino cause precipitation?

The occurrance of an El Nino event causes flash flooding and storms in areas such as Sout America, however in Australia, it is known to be the cause of droughts and dry seasons.

What are two changes in weather patterns caused by el nino that can cause disasters?

Floods, mudslides, drought, and also some changes in upwelling. I know that's four but it gives more of a variety.. :) hope I helped!

How does el nino affect ecosystem?

El nino is the warm ocean current. It affects the ocean ecosystem by changing the climate of those regions through which it passes. Change in its direction causes heavy rains at some places and drought at other places.

How are earthquakes and el nino alike?

they are alike because of the bad weather expieriences they can cause just the same as earthquakes can cause to the envoirment.(cause cracks in ground) El Nino causes many weather conditions such as almost the same as earthquakes

List three disasters that may occur when El Nino changes the weather patterns?

floods,mudslides,and drought and also changes in upwelling.