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首页> 外文期刊>Geoscience and Remote Sensing Letters, IEEE >An Aerosol-Dipole Event Over the Tropical Indian Ocean During 2006
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An Aerosol-Dipole Event Over the Tropical Indian Ocean During 2006

机译:2006年热带印度洋上空的偶极气溶胶事件

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摘要

Using aerosol optical depth (AOD at 550 nm) from the moderate-resolution imaging spectroradiometer, surface winds, outgoing long-wave radiation from National Centers for Environmental Prediction/National Center for Atmospheric Research reanalysis, and rainfall from Tropical Rainfall Measuring Mission data sets, we report a dipolelike variability in the aerosol concentration over the region (40°E-130° E; 10° S-10°;N) during September, October, and November 2006. Positive AOD anomalies (+ 0.4 to + 0.6) (relative to the 2000-2008 climatological average) along the equatorial East Indian Ocean and Indonesia and negative AOD anomalies (-0.2 to -0.4) over the western, northwestern, and central Indian Ocean characterize an aerosol-dipolelike variability. This east-west variability of the aerosol loading along the Indian Ocean is linked to the anomalously weak easterlies associated with the 2006 Indian Ocean Dipole event. The weaker easterlies lead to the hovering of the aerosol plume over Indonesia/Sumatra coast (98° E), enhancing the positive anomalies of AODs, while excessive rainfall over the central Arabian Sea caused the negative AOD anomalies.
机译:使用来自中分辨率成像光谱仪的气溶胶光学深度(550 nm的AOD),表面风,国家环境预测中心/国家大气研究中心的再分析长波辐射以及热带降雨测量任务数据集的降雨,我们报告了该地区的气溶胶浓度(40°,120°E-130°,10°,S-10°,10°)的偶极样变化。 °; N)在2006年9月,10月和11月期间。赤道东印度洋和印度尼西亚的AOD异常正值(+ 0.4至+ 0.6)(相对于2000-2008年的气候平均值)和AOD异常负值(-0.2至-印度洋西部,西北部和中部的0.4)的特征是气溶胶-偶极子样的变化。沿印度洋的气溶胶负荷的这种东西向变化与2006年印度洋偶极子事件相关的异常弱东风有关。较弱的东风导致印度尼西亚/苏门答腊海岸(98°E)上的气溶胶羽盘旋,增强了AOD的正异常,而阿拉伯中部中部的降雨过多则导致了AOD的负异常。

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