Global distribution and seasonal dependence of satellite-based whitecap fraction

被引：28
作者：
Salisbury, Dominic J. [1 ]
Anguelova, Magdalena D. [2 ]
Brooks, Ian M. [1 ]
机构：
[1] Univ Leeds, Inst Climate & Atmospher Sci, Leeds, W Yorkshire, England
[2] Naval Res Lab, Remote Sensing Div, Washington, DC USA
来源：
GEOPHYSICAL RESEARCH LETTERS | 2014年 / 41卷 / 05期
关键词：
whitecap; sea spray; whitecap fraction; wave breaking; air-sea flux; GAS TRANSFER VELOCITIES; OCEANIC WHITECAPS; AEROSOL PRODUCTION; SURFACE; RETRIEVALS; COVERAGE; FOAM; PARAMETERIZATION; REFLECTANCE; VARIABILITY;
D O I：
10.1002/2014GL059246
中图分类号：
P [天文学、地球科学];
学科分类号：
07 ;
摘要：
We present the first study of global seasonal distributions of whitecap fraction, W, obtained from satellite-based radiometric observations. Satellite-based W incorporates variability from forcings other than wind speed and can capture differences in W in initial and late lifetime stages. The satellite-based Wis more uniform latitudinally than predictions from a widely used wind speed-dependent parameterization, W(U-10), formulated from in situ observations, being on average higher than the W(U-10) predictions at low latitudes and lower at middle and high latitudes. This difference provides an explanation for the consistent geographical biases in sea spray aerosol concentration found in a number of large-scale models. Satellite estimates of W would benefit air-sea interaction and remote sensing applications that use parameterizations in terms of W such as sea spray flux, gas transfer, and surface winds. Key Points <list list-type="bulleted"> <list-item id="grl51407-li-0001">Seasonal dependence of global satellite-based whitecap fraction is presented <list-item id="grl51407-li-0002">Results are compared to parameterized estimates and differences quantified <list-item id="grl51407-li-0003">Implications of results for modeling air-sea processes are discussed
引用
收藏
页码：1616 / 1623
页数：8
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