Satellite climatology of African dust transport in the Mediterranean atmosphere
Satellite climatology of African dust transport in the Mediterranean atmosphere
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DOI：
10.1029/98jd00171
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发表时间：
1998-06
影响因子：
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通讯作者：
C. Moulin;C. Lambert;U. Dayan;V. Masson;M. Ramonet;P. Bousquet;M. Legrand;Y. Balkanski;W. Guelle;B. Marticorena;G. Bergametti;F. Dulac
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文献类型：
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作者：
C. Moulin;C. Lambert;U. Dayan;V. Masson;M. Ramonet;P. Bousquet;M. Legrand;Y. Balkanski;W. Guelle;B. Marticorena;G. Bergametti;F. Dulac
1983年6月至1994年12月期间，利用国际卫星云气候学项目（ISCCP-B2）气象卫星可见光（维斯）通道图像档案，对地中海大气中非洲尘埃浓度进行了每日分析。气象卫星红外图像ISCCP-B2档案还被用于确定北纬30度以北大陆上空尘埃移动的频率。尽管一个大的日变化，气候结果显示了一个明确的季节性循环，在旱季最大：灰尘输送开始在东部盆地在春季和夏季在西部盆地蔓延。这些模式被证明是有关的北非和地中海的降雨量的气旋。事实上，沙尘在非洲大陆上移动的频率和沙尘在海洋上爆发的频率与影响北非的低气压的气候密切相关。对流似乎是一个重要的因素，解释了季节性的东西移动的运输位置和南北梯度的尘埃浓度在地中海。
A daily analysis of African dust concentrations in the Mediterranean atmosphere has been made between June 1983 and December 1994 using the International Satellite Cloud Climatology Project (ISCCP-B2) archive of Meteosat visible (VIS) channel images. The ISCCP-B2 archive of Meteosat infrared (IR) images has also been used to determine the frequencies of dust mobilization over the continent, north of 30°N. Despite a large daily variability, climatological results show a clear seasonal cycle with a maximum during the dry season: dust transport begins over the eastern basin in spring and spreads over the western basin in summer. These patterns are shown to be related to both cyclogenesis over North Africa and rainfall over the Mediterranean Sea. Indeed, the frequency of dust mobilization over the continent and of dust outbreaks over the sea are strongly related to the climatology of depressions affecting North Africa. Precipitations appear to be an important factor explaining both the seasonal east-west shift in transport location and the south-north gradients of dust concentrations over the Mediterranean.