The studies related to aerosol and cloud properties are rare over the South Eastern African continent despite their significant influence on the regional climate. The present work is aimed at analyzing the spatiotemporal correlations between aerosol and cloud properties during 2008–2017 derived from the Moderate Resolution Imaging Spectroradiometer (MODIS) over the Republic of Malawi, Southeast Africa. The annual mean aerosol optical depth at 550 nm (AOD₅₅₀) was found high (>0.23) around the Lake Malawi and its environments, and in the southern parts of the study domain, characterized by dense population and increased anthropogenic activities. Whereas, low AOD centers were noticed over the high-altitude locations of central Malawi. The seasonal mean AOD₅₅₀ was found high during September-October-November (SON) (0.32) and June-July-August (JJA) (0.24) December-January-February (DJF) (0.2), and lowest in March-April-May (MAM) (0.16). The Ångström exponent (AE_412-470) sensitive to fine-mode particles was found high (>1.2) in most of the regions during the study period. The trend analysis from the linear regression technique found a general increase in AOD, except during SON was characterized by decreasing AOD. Besides, we investigated on understanding the relationship between AOD and cloud microphysical properties over the domain. The AOD₅₅₀ exhibited a negative correlation with cloud fraction (CF) and the cloud effective radius (CER). However, it showed a positive correlation with cloud top temperature (CTT) in areas of high AOD. Finally, the results from the backward trajectory analysis revealed that aerosols over Malawi were associated with long-range transport from the Arabian Deserts, Madagascar Island, Central Africa, and the Indian Ocean, along with locally produced aerosols during different seasons. The findings may be useful to better understand the sources and climatic effects of atmospheric aerosols in southeast Africa.

尽管与气溶胶和云特性有关的研究对地区气候有重大影响，但在东南非洲大陆上却很少。本工作旨在分析2008-2017年间来自南非马拉维共和国中分辨率成像光谱仪（MODIS）的气溶胶和云特性之间的时空相关性。在马拉维湖及其周围地区和研究区域的南部发现年平均气溶胶光学深度在550 nm（AOD ₅₅₀），较高（> 0.23），其特征是人口稠密，人为活动增多。鉴于在马拉维中部的高海拔地区发现了AOD较低的中心。季节性平均汇率AOD ₅₅₀在9月-10月-11月（SON）（0.32）和6月-7月-8月（JJA）（0.24），12月-1月-2月（DJF）（0.2）中发现最高，在3月-4月-5月（MAM）中最低（0.16）。在研究期间的大多数地区，对精细模式颗粒敏感的Ångström指数（AE _412-470）被发现较高（> 1.2）。线性回归技术的趋势分析发现，除SON期间AOD的降低外，AOD普遍增加。此外，我们进行了研究，以了解AOD和整个域云微物理特性之间的关系。AOD ₅₅₀与云分数（CF）和云有效半径（CER）呈负相关。但是，在高AOD区域，它与云顶温度（CTT）呈正相关。最后，向后轨迹分析的结果表明，马拉维上空的气溶胶与阿拉伯沙漠，马达加斯加岛，中非和印度洋的远程运输以及不同季节的本地气溶胶有关。这些发现可能有助于更好地了解非洲东南部大气气溶胶的来源和气候影响。