Normally, the trade winds and strong equatorial currents flow toward the west and the Peruvian current causes upwelling of cold water along the coast of west South America. During El Nino however, the pressure changes causing trade winds to diminish and warm water to move eastward instead of westward along the equator.
Normal conditions versus El Nino conditions Normally, the trade winds and strong equatorial currents flow toward the west and the Peruvian current causes upwelling of cold water along the coast of west South America.
During El Nino what happens to the Walker Circulation: It weakens/ reverse causing the ocean surface to be warmer than average because less or no upwelling occurs in the eastern Pacific. During La Nina what happens to the Walker Circulation:
During El Nino however, the pressure changes causing trade winds to diminish and warm water to move eastward instead of westward along the equator. This causes the traditionally cold waters along the coast of west South America to become warmer. Does convection move with the warm water during El Nino? Yes! What does El Nino involve? a.
So, we could conclude that from the given examples, the one that is not true of an El Niño– Southern Oscillation (ENSO) event is : It causes increased upwelling on the coast of South America.
Severe drought and associated food insecurity, flooding, rains, and temperature rises due to El Niño are causing a wide range of health problems, including disease outbreaks, malnutrition, heat stress and respiratory diseases.
Weaker winds means the ocean gets warmer and this process happens interchangeably and consecutively thus making the El Niño bigger and bigger. In other words, El Niño is caused by the weakening of the trade winds which results in pushing of warm surface water to the west and less cold water to the east.
During an El Niño event, sea surface temperatures over the central and eastern Pacific become warmer than normal. The normal easterly trade winds weaken and sometimes, the winds will switch and blow from the west to the east!
The correct answer is Option 2. It is a climate pattern that describes the unusual warming of surface waters in the eastern tropical Pacific Ocean. It is the warm phase of a larger phenomenon called the El Nino-Southern Oscillation (ENSO).
Although El Niño's strongest impacts are felt around the equatorial Pacific, they can affect weather around the world by influencing high and low pressure systems, winds and precipitation. And as the warmer ocean waters release excess energy (heat) into the atmosphere, global temperatures rise.
EL Nino means christian name called baby christ. (i) The presence of the EL-Nino leads to an increase in sea-surface temperatures. (ii) It weakens the trade winds in the regions and causes heavy rainfall, floods or droughts in different regions of the world.
Fewer hurricanes and other tropical cyclones in the north Atlantic. Milder winters in southern Canada and the northern continental United States. Replenishment of water supplies in the southwestern U.S. Less disease in some areas due to drier weather (like malaria in southeastern Africa)
(i) The presence of the EL-Nino leads to an increase in sea-surface temperatures. (ii) It weakens the trade winds in the regions and causes heavy rainfall, floods or droughts in different regions of the world.
El Niño impacts weather systems around the globe, triggering predictable disruptions in temperature, rainfall and winds. La Niña is the opposite – a cooling phase of ENSO that tends to have global climate impacts opposite to those of El Niño.