Originally Posted by Ocean Girl
Ok, since this is the weather
section. What factors ( short term, no climate change stuff please) allowed this typhoon to get so massive?
Some stuff here...
Haiyan got so strong because "it has everything working for it," McNoldy said. First, it formed in the open ocean, and thus no land mass prevented it from forming a symmetrical circular pattern, which helps a cyclone form and gather steam, he said.
Second, ocean temperatures are incredibly warm, topping out at 86 degrees Fahrenheit (30 degrees Celsius). Just as important, the warm water
also extends deep into the ocean, meaning that upwelling caused by the winds will not churn up cold water
, which dampens cyclone power, McNoldy said. Tropical cyclones are basically giant heat engines, powered by the transfer of heat from the ocean to the upper atmosphere.
Third, there is very little wind
shear in the area at this time, McNoldy said. Wind
shear, a difference in wind speed or direction with increasing altitude, tears developing hurricanes apart, and prevents them from strengthening. Wind shear caused by westerly winds is the main reason why the Atlantic hurricane
season featured few strong storms, and got off to a late start, weather
But not really possible to ignore completely climate change , the oceans are getting warmer, the Pacific not just on the surface either.