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Why Do Trade Winds Weaken Or Cease: Unraveling Natures Wind Mysteries

El Niño | Oceanic & Climatic Impacts, Causes & Effects | Britannica

Why Do Trade Winds Weaken Or Cease: Unraveling Natures Wind Mysteries

What Causes The Trade Winds And Why Were They So Important?

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Are Trade Winds Strong Or Weak?

The strength of trade winds is influenced by the phase of the Arctic Oscillation (AO), a climate pattern that affects weather conditions in various regions. When the AO is in its warm phase, trade winds tend to be stronger in tropical areas. Conversely, during the cold phase of the AO, trade winds become weaker. When trade winds are weaker, they bring increased rainfall to landmasses within the tropics, such as Central America. This relationship between the Arctic Oscillation and trade wind strength plays a significant role in shaping weather patterns in tropical regions, impacting precipitation and climate conditions.

When Trade Winds Weaken And Possibly Reverse?

During an El Niño or ENSO (El Niño-Southern Oscillation) event, a notable phenomenon occurs where the trade winds, prevailing easterly winds in the tropics, experience a significant weakening and sometimes even reverse their direction. In the case of a robust El Niño event, this alteration in wind patterns can lead to a complete reversal of the trade winds. Consequently, this shift in the wind pattern has a profound impact on oceanic processes. It markedly diminishes or halts the usual westward movement of surface water, thereby reducing the intensity of cold water upwelling along the eastern Pacific coast (as illustrated in Figure 2).

What Happens When Trade Winds Strengthen?

In the field of climate research, a growing body of evidence suggests that when trade winds strengthen, a particular climate phenomenon occurs. This phenomenon involves the intensification of trade winds causing a greater amount of heat to be pushed downward into the ocean. As a result of this process, there is a temporary deceleration in the upward trend of surface temperatures. This finding is significant for understanding how trade wind patterns can influence short-term variations in global climate. (Publication date: February 10, 2014)

Collect 26 Why do trade winds weaken or cease

El Niño | Oceanic & Climatic Impacts, Causes & Effects | Britannica
El Niño | Oceanic & Climatic Impacts, Causes & Effects | Britannica

Categories: Update 69 Why Do Trade Winds Weaken Or Cease

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What causes the trade winds and why were they so important?
What causes the trade winds and why were they so important?

The strengthening and weakening of the trade winds is a function of changes in the pressure gradient of the atmosphere over the tropical Pacific. Ironically, the warming of the sea surface works to decrease the atmospheric pressure above it by transfering more heat to the atmosphere and making it more buoyant.When the phase of the Arctic oscillation (AO) is warm, trade winds are stronger within the tropics. The cold phase of the AO leads to weaker trade winds. When the trade winds are weaker, more extensive areas of rain fall upon landmasses within the tropics, such as Central America.During an El Niño / ENSO event, the trade winds weaken and during a strong El Niño may reverse direction. This change in the wind field pattern greatly reduces or stops the westward transport of water and thus the degree of cold water up-welling over the eastern Pacific (Figure 2).

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