Daily and Seasonal Variation of Aerosol Optical Depth and Angstrom Exponent over Ethiopia using MODIS Data

被引:4
|
作者
Eshet, Asmarech [1 ]
Raju, U. Jaya Prakash [1 ]
机构
[1] Bahir Dar Univ, Coll Sci, Dept Phys, POB 79, Bahir Dar, Ethiopia
来源
POLLUTION | 2022年 / 8卷 / 01期
关键词
MODIS; Aerosol optical depth; Angstrom exponent; CHINA; AREA;
D O I
10.22059/POLL.2021.316010.971
中图分类号
X [环境科学、安全科学];
学科分类号
08 ; 0830 ;
摘要
Aerosols are tiny particles (liquid or solid) suspended in the atmosphere. They play a significant role in climate dynamics directly or indirectly. Aerosol Optical Depth (AOD) and Angstrom Exponent (AE) are significant parameters to study the concentration and size or type of aerosol over an area, respectively. In this article, we utilized three years of AOD and AE parameters derived from moderate resolution imaging spectroradiometer (MODIS) satellite during the period January, 2013 to December, 2015 over Ethiopia. In order to study the spatiotemporal pattern of aerosols, we choose three areas (Debretabour, Gojjam and Addis Ababa) over Ethiopian highlands, which are representative of non-industrial, agricultural and industrial areas respectively. Further we compare continental aerosols with marine aerosols from Djibouti. Our results clearly depicts the aerosol distribution over Ethiopia is highly variable spatially and temporally. The results indicates that the urban and biomass aerosols are dominate over Addis Ababa, and Gojjam respectively, whereas dust and biomass aerosols are present over Debretabour, while Djibouti is loaded by sea spray aerosols. The seasonal variability of AOD is found to be maximum during the kiremt (summer) and minimum during bega (winter) over all areas (continental and marine).
引用
收藏
页码:315 / 329
页数:15
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