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DOI	10.1016/j.atmosres.2020.104950
	Inter-comparison of multi-satellites and Aeronet AOD over Indian Region
	Mangla R.; J I.; Chakra S.S.
发表日期	2020
ISSN	0169-8095
卷号	240
英文摘要	Aerosols affect global as well as regional climate by interacting with solar radiations and by altering the cloud properties. Due to the scarcity of ground observations over entire India, especially over Indo-Gangetic Plains (IGP), satellite-based measurements provide better spatial and temporal coverage for the evaluation of aerosol optical properties. This study presents the inter-comparison of multiple satellites (MISR, MODIS, and OMI) and ground-based aerosol optical depth (AOD) for the 2010–2017 (8 years) period over IGP (Gandhi College, Jaipur, and Kanpur) region. Satellite observations are spatially and temporally collocated by an average of 50 × 50 km square box and ±30 minutes, respectively. Results indicate a higher correlation with MODIS (R2 = 0.7 at Gandhi College) followed by MISR and OMI AOD. Irrespective of few observations (219) at Jaipur, MISR shows the highest percentage (58%) of data points within the error envelope because of multiple angle viewing and spectral capability gives the accurate information in high reflecting desert areas. MISR and OMI have a systematic negative bias trend for higher AOD at all test sites, while MODIS has a negative bias over the Jaipur region only. The temporal analysis reveals the higher concentration of fine mode aerosols captured by MISR and MODIS in December month over Gandhi College and Kanpur region, whereas Jaipur is over-loading with coarser aerosols during April to June month from the Thar Desert and Middle East dust storms. Seasonal distribution over the IGP region indicates higher AOD in summer owing to dust storms. Inter-comparison shows that MODIS has higher seasonal AOD as compared to MISR. The spatial correlation between MODIS and MISR is high during the summer and winter seasons. The OMI sensor performance over the IGP region has not been found to match with existing patterns. These findings are useful in the context of selecting the most reliable satellite AOD products for future studies. © 2020 Elsevier B.V.
英文关键词	Aeronet; AOD; MISR; MODIS; OMI; Seasonal; Spatial correlation
语种	英语
scopus关键词	Aerosols; Dust; Optical properties; Satellites; Storms; AERONET; MISR; MODIS; Seasonal; Spatial correlations; Radiometers; AERONET; aerosol; correlation; MISR; MODIS; optical depth; seasonal variation; Gangetic Plain; India; Jaipur; Rajasthan
来源期刊	Atmospheric Research
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/141932
作者单位	Department of Civil Engineering, Indian Institute of Technology, Bombay, India; Interdisciplinary Center for Climate Studies, Indian Institute of Technology Bombay, India
推荐引用方式 GB/T 7714	Mangla R.,J I.,Chakra S.S.. Inter-comparison of multi-satellites and Aeronet AOD over Indian Region[J],2020,240.
APA	Mangla R.,J I.,&Chakra S.S..(2020).Inter-comparison of multi-satellites and Aeronet AOD over Indian Region.Atmospheric Research,240.
MLA	Mangla R.,et al."Inter-comparison of multi-satellites and Aeronet AOD over Indian Region".Atmospheric Research 240(2020).