Relationships between mineral dust and cloud properties in the West African Sahel

被引：20

作者：

Klueser, L. ^{[1
,2
]}

Holzer-Popp, T. ^{[1
]}

机构：

[1] German Aerosp Ctr DLR, German Remote Sensing Datactr DFD, Wessling, Germany

[2] Univ Augsburg, Inst Phys, D-8900 Augsburg, Germany

来源：

ATMOSPHERIC CHEMISTRY AND PHYSICS | 2010年 / 10卷 / 14期

关键词：

TROPOSPHERIC AEROSOLS; PRECIPITATION; CLIMATE; IMPROVEMENTS; RETRIEVAL; NUCLEI; SEVIRI; IMPACT; AVHRR;

D O I：

10.5194/acp-10-6901-2010

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

Aerosol cloud interactions are known to be of great importance to many parts of the climate system. Five years of observations from three different satellites (Aqua, ENVISAT and Meteosat Second Generation) are used to statistically analyse the relationship of mineral dust aerosol, separated from other aerosol species, with monsoon season cloud state in the West African Sahel domain. Additionally, observations of the Tropical Rainfall Measuring Mission are used for discrimination of dry and wet seasons. The aerosol-cloud-interactions are analysed separately by season and air mass in order to minimise spurious correlations with meteorological conditions. The detailed analysis uncovers different counteracting relationships of the mineral dust aerosol with the cloud state, which is also evident from an analysis of the spatial distribution patterns of cloud properties changes with dust activity. The aerosol-cloud relationships found from the analysis of this multiple year dataset are mainly consistent with the hypothesis of a suppression of convective activity, but also indications of lifetime enhancement and thus increased cloud cover and convective intensity are found in some subsets.

引用

页码：6901 / 6915

页数：15

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