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1 ESTER - LATMOS LATMOS - Laboratoire Atmosphères, Milieux, Observations Spatiales 2 CNRM-GAME - Groupe d-étude de l-atmosphère météorologique 3 IPSL - Institut Pierre-Simon-Laplace 4 LOCEAN - Laboratoire d-Océanographie et du Climat : Expérimentations et Approches Numériques 5 LEGOS - Laboratoire d-études en Géophysique et océanographie spatiales 6 INSU-SPU - Institut National des Sciences de l-Univers 7 RSMAS - Rosenstiel School of Marine and Atmospheric Science 8 LICB - Laboratoire Interdisciplinaire Carnot de Bourgogne 9 LATMOS - Laboratoire Atmosphères, Milieux, Observations Spatiales 10 CETP - Centre d-étude des environnements terrestre et planétaires 11 FEMTO-ST - Franche-Comté Électronique Mécanique, Thermique et Optique - Sciences et Technologies 12 DTI - Division technique INSU-SDU

Abstract : Turbulent fluxes at the air‐sea interface were estimated in the framework of the African Monsoon Multidisciplinary Analysis AMMA international program. A specific flux measurement mast was designed so as to minimize aerodynamic flow distortion and vibrations. The mast was installed on the research vessel Atalante that cruised in the Gulf of Guinea during the onset of the African monsoon, in June-July 2006. Turbulent fluxes were calculated with an eddy covariance method and with a spectral method. Calculation of eddy correlation fluxes required a correction of flow distortion at turbulent scales, which was performed with a new statistical technique. Application of the spectral flux calculation method revealed that an imbalance term was required, in agreement with results from earlier experiments, and indicated that the value of the Kolmogorov constant 0.55 should not be modified. Bulk exchange coefficients calculated are in good agreement with earlier parameterizations in medium wind conditions.





Autor: Denis Bourras - Alain Weill - Guy Caniaux - Laurence Eymard - Bernard Bourlès - S. Letourneur - D. Legain - Erica Key - Françoi

Fuente: https://hal.archives-ouvertes.fr/



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