Query: Climate change is because of El Niño.

Relevant passages:
El Niño <=SEP=> El Niño -LSB- ɛl_ˈniːnjoʊ -RSB- ( -LSB- el ˈniɲo -RSB- ) is the warm phase of the El Niño Southern Oscillation ( commonly called 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 off the Pacific coast of South America . El Niño Southern Oscillation refers to the cycle of warm and cold temperatures , as measured by 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 . The cool phase of ENSO is called `` La Niña '' with SST in the eastern Pacific below average and air pressures high in the eastern and low in western Pacific . The ENSO cycle , both El Niño and La Niña , cause global changes of both temperatures and rainfall .   Developing countries that are dependent upon agriculture and fishing , particularly those bordering the Pacific Ocean , are usually most affected . In American Spanish , the capitalized term `` El Niño '' refers to `` the little boy '' , so named because the pool of warm water in the Pacific near South America is often at its warmest around Christmas . The original name , `` El Niño de Navidad '' , traces its origin centuries back to Peruvian fisherman , who named the weather phenomenon in reference to the newborn Christ . `` La Niña '' , chosen as the ` opposite ' of El Niño , literally translates to `` the little girl '' .

Humboldt Current <=SEP=> The Humboldt Current System ( HCS ) , also called the Peru Current , is a major Eastern Boundary Upwelling Ecosystem that flows north along the western coast of South America . It is an eastern boundary current flowing in the direction of the equator , and extend 500-1 ,000 kilometers offshore . The Humboldt Current is named after the Prussian naturalist Alexander von Humboldt . In 1846 , von Humboldt reported measurements of the cold-water current in his book Cosmos .   The current extends from the southern Chile ( ~ 45 'S ) to northern Peru ( ~ 4 'S ) where cold , upwelled waters intersect warm tropical waters to form the Equatorial Front . Sea surface temperatures off the coast of Peru , around 5 'S , reach temperatures as low as 16 ' C . This is highly uncharacteristic of tropical waters , as most other regions have temperatures measuring above 25 ' C. Upwelling brings nutrients to the surface , which support phytoplankton and ultimately increase biological productivity .   Upwelling within the current is not uniform across the entire system . Three notable upwelling subsystems are produced by this current : i ) seasonal upwelling in Chile , ii ) upwelling `` shadow '' that is less productive , but still large in northern Chile and Southern Peru , and iii ) year-round upwelling in Peru .   The Humboldt Current is considered a Class I , highly productive ( > 300 gC/m2-yr ) , ecosystem . It is the most productive eastern boundary current system . It accounts for roughly 18-20 % of the total worldwide marine fish catch . The species are mostly pelagic : sardines , anchovies and jack mackerel . The system 's high productivity supports other important fishery resources as well as marine mammals ( eared seals and cetaceans ) and seabirds . The cold , nutrient-rich water brought to the surface by upwelling drives the system 's extraordinary productivity.Periodically , the upwelling that drives the system 's productivity is disrupted by the El Niño-Southern Oscillation ( ENSO ) event . When this occurs , fish abundance and distribution are significantly affected , often leading to stock crashes and cascading social and economic impacts . These events have led to sequential changes , where sardines and anchovies have replaced each other periodically as the dominant species in the ecosystem . These species changes can have negative consequences for the fishing industry and the economies of the countries that fish the system .   The Humboldt has a considerable cooling influence on the climate of Chile , Peru and Ecuador . It is also largely responsible for the aridity of Atacama Desert in northern Chile and coastal areas of Peru and also of the aridity of southern Ecuador . Marine air is cooled by the current and thus is not conducive to generating precipitation ( although clouds and fog are produced ) .

La Niña <=SEP=> La Niña ( -LSB- lɑːˈniːnjə -RSB- , -LSB- la ˈniɲa -RSB- ) is a coupled ocean-atmosphere phenomenon that is the counterpart of El Niño as part of the broader El Niño -- Southern Oscillation climate pattern . The name La Niña originates from Spanish , meaning `` the little girl '' , analogous to El Niño meaning `` the little boy '' . It has also in the past been called anti-El Niño , and El Viejo ( meaning `` the old man '' ) . During a period of La Niña , the sea surface temperature across the equatorial Eastern Central Pacific Ocean will be lower than normal by 3 to 5 ° C . In the United States , an appearance of La Niña persists for at least five months . It has extensive effects on the weather in North America , even affecting the Atlantic Hurricane Season .