Global analysis of aerosol properties above clouds
Global analysis of aerosol properties above clouds
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DOI：
10.1002/2013gl057482
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发表时间：
2013-11
影响因子：
5.2
通讯作者：
F. Waquet;F. Peers;F. Ducos;P. Goloub;S. Platnick;J. Riedi;D. Tanré;F. Thieuleux
中科院分区：
文献类型：
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作者：
F. Waquet;F. Peers;F. Ducos;P. Goloub;S. Platnick;J. Riedi;D. Tanré;F. Thieuleux
利用2008年被动卫星资料，分析了云上气溶胶（AAC）的季节和空间变化特征。在全球范围内，大量的气溶胶在液态水云上方传输。对于处于精细模式的颗粒（即，半径小于0.3 µm），包括晴空和AAC，反演使全球平均气溶胶光学厚度增加了25（±6）%。起源于人为AAC的两个主要区域是热带东南大西洋，生物质燃烧气溶胶，以及北太平洋，主要是污染物。春季期间，在北极上空也发现了人造AAC。矿物尘埃颗粒在所谓的“尘埃带”区域（5-40° N）的云层上方被检测到。AAC可能会引起变暖效应，并使云属性的反演产生偏差。这项研究将有助于更好地量化气溶胶对云和气候的影响。
The seasonal and spatial variability of Aerosol Above Cloud (AAC) properties are derived from passive satellite data for the year 2008. A significant amount of aerosols are transported above liquid water clouds on the global scale. For particles in the fine mode (i.e., radius smaller than 0.3 µm), including both clear‐sky and AAC, retrievals increase the global mean aerosol optical thickness by 25(±6)%. The two main regions of originated anthropogenic AAC are the tropical Southeast Atlantic, for biomass‐burning aerosols, and the North Pacific, mainly for pollutants. Man‐made AAC are also detected over the Arctic during the spring. Mineral dust particles are detected above clouds within the so‐called “dust belt” region (5–40° N). AAC may cause a warming effect and bias the retrieval of the cloud properties. This study will then help to better quantify the impacts of aerosols on clouds and climate.