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Large-scale circulation departures related to wet episodes in north-east BrazilLarge scale circulation features are presented as related to wet spells over northeast Brazil (Nordeste) during the rainy season (March and April) of 1979. The rainy season is divided into dry and wet periods; the FGGE and geostationary satellite data was averaged; and mean and departure fields of basic variables and cloudiness were studied. Analysis of seasonal mean circulation features show: lowest sea level easterlies beneath upper level westerlies; weak meridional winds; high relative humidity over the Amazon basin and relatively dry conditions over the South Atlantic Ocean. A fluctuation was found in the large scale circulation features on time scales of a few weeks or so over Nordeste and the South Atlantic sector. Even the subtropical High SLPs have large departures during wet episodes, implying a short period oscillation in the Southern Hemisphere Hadley circulation.
Document ID
19870063383
Document Type
Reprint (Version printed in journal)
External Source(s)
Authors
Sikdar, Dhirendra N. (Wisconsin Univ. Milwaukee, WI, United States)
Elsner, James B. (Wisconsin, University Milwaukee, United States)
Date Acquired
August 13, 2013
Publication Date
April 1, 1987
Publication Information
Publication: Royal Meteorological Society, Quarterly Journal
Volume: 113
ISSN: 0035-9009
Subject Category
METEOROLOGY AND CLIMATOLOGY
Funding Number(s)
CONTRACT_GRANT: NAG5-384
Distribution Limits
Public
Copyright
Other