Wednesday, October 29, 2014

Global and Local Winds in Brazil

Location and Global Wind

Brazil's geographic location has it in both the Northern and Southern Hemispheres, stretching from just over 30S to about 5N and roughly 35W to 73W.  The behemoth thus has the pleasure of entertaining Hadley Cells in both the North and Southern hemisphere, but mostly south.  Easterly trade winds associated with a subtropical high blow from the southeast providing a fairly moderate climate for much of the country.   The southern portion of the country has the good fortune of being on the boarder between the Hadley and Ferrel Cells.  Westerly winds originating in higher southern latitudes cool the region and occasionally bring dusting's of snow to higher elevations.  With the equator crossing through the heart of the Amazon region to the north, low pressure doldrums persist bringing incredibly stable temperatures year round. 

Global Wind and Weather & Map

Local Winds

The mountainous region is located along the east coast beginning in the south and stretches northeastward up the coast. Of the five wind types, mountain and valley winds Foehn or Chinook wind, Katabatic winds, Santa Ana winds, the dry central southern region does experience Foehn winds. 
There are at least two local types of wind in Brazil.  The Abrolhos is a squall wind that happens during winter near 18S and typically happens when an Antarctic cold front reaches warm southeast trades that have aquired a boatload of moisture over the Brazilian current, which flows southwest begging around 10S.  The second type is a Minuano that occurs much further South.  These take place when very High Pressure is to the North and cold polar fronts from the southwest of the continent meet warm stationary humid air.


1 comment:

  1. Brazil's forecast temperature is a lot hotter than Japan's forecast. Plus Japan's precipitation percentage is pretty high right now compare to Brazil. Brazil has a High pressure close by and no fronts. Japan had High and Low pressure all around Japan. Plus had cold, warm, and occluded fronts all around Japan.

    ReplyDelete