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		<issn>0916-8370</issn>
		<citationkey>RaoGiarEspiFran:2008:CoSuWi</citationkey>
		<title>Comparison of surface wind stress characteristics over the tropical Atlantic (10 degrees N-40 degrees S) in fields derived from the UWM/COADS, NCEP/NCAR and QuikSCAT datasets</title>
		<year>2008</year>
		<secondarydate>20060125</secondarydate>
		<month>AUG.</month>
		<secondarytype>PRE PI</secondarytype>
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		<size>853 KiB</size>
		<author>Rao, Vadlamudi Brahmananda,</author>
		<author>Giarolla, Emanuel,</author>
		<author>Espirito Santo, Clovis Monteiro do,</author>
		<author>Franchito, Sergio Henrique,</author>
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		<group>DMA-CPT-INPE-MCT-BR</group>
		<group>DMD-CPT-INPE-MCT-BR</group>
		<affiliation>Instituto Nacional de Pesquisas Espaciais (INPE/CPTEC)</affiliation>
		<affiliation>Instituto Nacional de Pesquisas Espaciais (INPE/CPTEC)</affiliation>
		<affiliation>Instituto Nacional de Pesquisas Espaciais (INPE/CPTEC)</affiliation>
		<affiliation>Instituto Nacional de Pesquisas Espaciais (INPE/CPTEC)</affiliation>
		<e-mailaddress>atus@cptec.inpe.br</e-mailaddress>
		<journal>Journal of Oceanography</journal>
		<volume>64</volume>
		<number>4</number>
		<pages>551-560</pages>
		<progress>ePrint update</progress>
		<transferableflag>1</transferableflag>
		<contenttype>External Contribution</contenttype>
		<keywords>wind stress,,ocean modeling, intertropical convergence zone, UWM/COADS, NCEP/NCAR reanalysis, QuikSCAT dataset, climatology.</keywords>
		<abstract>A comparison of monthly wind stress derived from winds of NCEP/NCAR (National Centers for Environmental Prediction/National Center for Atmospheric Research) reanalysis and UWM/COADS (The University of Wisconsin -Milwaukee/Comprehensive Ocean-Atmosphere Data Set) dataset (1950-1993), and of NCEP/NCAR reanalysis and satellite-based QuikSCAT dataset (2000-2006), is made over the South Atlantic (10 degrees N-40 degrees S). On a mean seasonal scale, the comparison shows that these three wind stress datasets have qualitatively similar patterns. Quantitatively, in general, from about the equator to 20 degrees S in the mid-Atlantic the wind stress values are stronger in NCEP/NCAR data than those in UWM/COADS data. On the other hand, in the Intertropical Convergence Zone (ITCZ) area the wind stress values in NCEP/NCAR data are slightly weaker than those in UWM/COADS data. In the South Atlantic, between 20 degrees S-40 degrees S, the QuikSCAT dataset presents complex circulation structures which are not present in NCEP/NCAR and UWM/COADS data. The wind stress is used in a numerical ocean model to simulate ocean currents, which are compared to a drifting-buoy observed climatology. The modeled South Equatorial Current agrees better with observations between March-May and June-August. Between December-February, the South Equatorial Current from UWM/COADS and QuikSCAT experiments is stronger and more developed than that from NCEP/NCAR experiment. The Brazil Current, in turn, is better represented in the QuikSCAT experiment. Comparison of the annual migration of ITCZ at 20 degrees and 30 degrees W in UWM/COADS and NCEP/NCAR data sources show that the southernmost position of ITCZ at 30 degrees W in February, March and April coincides with the rainy season in NE Brazil, while the northernmost position of ITCZ at 20 degrees W in August coincides with the maximum rainfall of Northwest Africa.</abstract>
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		<language>en</language>
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