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Relationship Between Wind Speed and Aerosol Optical Thickness over Remote Ocean

HAIYAN HUANG(1), Don Grainger(2) and Gareth Thomas(2)

(1) University of Oxford, Clarendon Laboratory, Oxford OX1 3PU, OXFORD, United Kingdom
(2) University of Oxford, Clarendon Laboratory, Oxford OX1 3PU, OXFORD, United Kingdom

Abstract

Remote ocean regions are defined by the combination of aerosol optical thickness(AOT) from satellite observation and wind direction from ECMWF. According to our definition, many oceanic regions can not be taken as remote ocean regions due to long range transportation of aerosols from continents. The effect of wind speed on AOT over remote ocean regions is also investigated. Highly correlated linear relationships are found in remote ocean regions with a wind speed range of 4-20m/s. The enhancement of AOT at high wind speed is explained as the increase of sea salt aerosol production.