At the time of El Nino, the trade winds are weaker at the equator over the Pacific ocean why? please explain those who knows exact answer......
That's thing is ok Sir but Sir i want to know about trade wind, trade wind are weaker at the time of El Nino that's why western pacific warm water start moving towards eastern pacific so what is the region behind trade winds are weaker at the time of El Nino?
Sir you are telling me about trade wind but i am asking why trade wind are weaker at the time of El Nino in Pacific Ocean please understand my question.
Thanks for this good information but El Nino phenomena happened in the average period length of five years but trade wind weaker and stronger happen periodically in a year and according to you El Nino phenomena should happen once in a year because trade wind weaker at least once in a year so how trade wind genesis El Nino phenomena??
that's a good information Sir but still i didn't get answer of my question....Sir please read my question carefully and also read comments on this question
Dear Sir no matter people give bad or good comment the thing is we learned something from discussion..
Ravi - Short answer is that the equatorial trade winds are responding to the change in sea surface temperature gradient along the equator. Longer answer: During an El Nino event, the pattern of equatorial sea surface temperatures change. Normally they are cold near South America and warm near Indonesia. During an El Nino, when the warm water moves eastward towards South America (along the thermocline, and reducing the equatorial upwelling), they weaken that gradient, and sometimes event reverse it. As that E-W SST gradient gets weaker, the trade winds get weaker. The intervening atmospheric variable is the sea level pressure.
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