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Effect of wind speed on aerosol optical depth over remote oceans, based on data from the Maritime Aerosol Network

机译:基于海洋气溶胶网络的数据,风速对偏远海洋气溶胶光学深度的影响

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摘要

The Maritime Aerosol Network (MAN) has been collectingdata over the oceans since November 2006. The MAN archive provides avaluable resource for aerosol studies in maritime environments. In thecurrent paper we investigate correlations between ship-borne aerosol opticaldepth (AOD) and near-surface wind speed, either measured (onboard or fromsatellite) or modeled (NCEP). According to our analysis, wind speedinfluences columnar aerosol optical depth, although the slope of the linearregression between AOD and wind speed is not steep (~0.004–0.005),even for strong winds over 10 m s. The relationships show significantscatter (correlation coefficients typically in the range 0.3–0.5); themajority of this scatter can be explained by the uncertainty on the inputdata. The various wind speed sources considered yield similar patterns.Results are in good agreement with the majority of previously publishedrelationships between surface wind speed and ship-based or satellite-basedAOD measurements. The basic relationships are similar for all the wind speedsources considered; however, the gradient of the relationship varies byaround a factor of two depending on the wind data used.
机译:自2006年11月以来,海上气溶胶网络(MAN)一直在收集海洋数据。MAN档案为海上环境中的气溶胶研究提供了宝贵的资源。在当前的论文中,我们研究了船载气溶胶光学深度(AOD)与近地表风速之间的相关性,无论是测量的(机载的还是来自卫星的)或模型化的(NCEP)。根据我们的分析,尽管AOD和风速之间的线性回归斜率并不陡峭(〜0.004-0.005),即使对于10 m s以上的强风,风速也会影响柱状气溶胶光学深度。这些关系显示出很大的分散性(相关系数通常在0.3-0.5的范围内);分散的大部分可以通过输入数据的不确定性来解释。所考虑的各种风速源产生相似的模式。结果与先前公布的大多数地面风速与基于船载或基于卫星的AOD测量之间的关系非常吻合。对于所有考虑的风速源,基本关系都是相似的。但是,根据所使用的风力数据,关系的坡度变化大约两倍。

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