DOI: 10.3724/SP.J.1085.2013.00147

Advances in Polar Science 2013/24:3 PP.147-152

Evaluation of reanalysis and satellite-based sea surface winds using in situ measurements from Chinese Antarctic Expeditions

Sea surface winds from reanalysis(NCEP-2 and ERA-40 datasets)and satellite-based products(QuikSCAT and NCDC blended sea winds)are evaluated using in situ ship measurements from the Chinese National Antarctic Research Expeditions(CHINAREs)from 1989 through 2006,with emphasis on the Southern Ocean(south of 45°S).Compared with ship observations,the reanalysis winds have a positive mean bias(0.32 m·s-1for NCEP-2 and 0.13 m·s-1for ERA-40),and this bias is more pronounced in the Southern Ocean(0.57 m·s-1and 0.45 m·s-1,respectively).However,mean biases are negative in the tropics and subtropics.The satellite-based winds also show positive mean biases,larger than those of the reanalysis data.All four wind products overestimate ship wind speed for weak winds(<4 m·s-1)but underestimate for strong winds(>10 m·s-1).Differences between the reanalysis and satellite winds are examined to identify regions with large discrepancies.

Key words:Sea surface winds,NCEP-2,ERA-40,QuikSCAT,NCDC blended sea winds,Southern Ocean

ReleaseDate:2015-04-16 13:27:13

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