Satellite-based assessment of top of atmosphere anthropogenic aerosol radiative forcing over cloud-free oceans

被引：52

作者：

Christopher, Sundar A.

Zhang, Jianglong

Kaufman, Yoram J.

Remer, Lorraine A.

机构：

[1] Univ Alabama, Dept Atmospher Sci, Huntsville, AL 35806 USA

[2] NASA, Goddard Space Flight Ctr, Atmospheres Lab, Greenbelt, MD 20771 USA

来源：

GEOPHYSICAL RESEARCH LETTERS | 2006年 / 33卷 / 15期

关键词：

D O I：

10.1029/2005GL025535

中图分类号：

P [天文学、地球科学];

学科分类号：

07 ;

摘要：

Most assessments of the direct climate forcing (DCF) of anthropogenic aerosols are from numerical simulations. However, recent advances in remote sensing techniques allow the separation of fine mode aerosols ( anthropogenic aerosol is mostly fine aerosol) from coarse mode aerosols ( largely marine and dust, which are mostly natural) from satellite data such as the Moderate Resolution Imaging SpectroRadiometer ( MODIS). Here, by combining MODIS narrowband measurements with broadband radiative flux data sets from the Clouds and the Earth's Radiant Energy System (CERES), we provide a measurement-based assessment of the global direct climate forcing ( DCF) of anthropogenic aerosols at the top of atmosphere (TOA) only for cloud free oceans. The mean TOA DCF of anthropogenic aerosols over cloud-free oceans [60N - 60S] is - 1.4 +/- 0.9 Wm(-2), which is in excellent agreement ( mean value of - 1.4 Wm(-2)) with a recent observational study by Kaufman et al. [ 2005].

引用

页数：4

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