气候变化领域集成服务门户(CCPortal): Characteristic dissimilarities during high aerosol loading days between western and eastern Indo-Gangetic Plain

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DOI	10.1016/j.atmosenv.2021.118837
	Characteristic dissimilarities during high aerosol loading days between western and eastern Indo-Gangetic Plain
	Shukla K.K.; Sarangi C.; Attada R.; Kumar P.
发表日期	2022
ISSN	1352-2310
卷号	269
英文摘要	This study investigates the long-term (2003–2019) variations of high aerosol loading days and their radiative impacts over the western Indo-Gangetic Plain (IGP) and eastern IGP during pre-monsoon season (March-April-May-June). The Aerosol Optical Depth (AOD) climatology from MODIS (Terra and Aqua) and MERRA-2 reanalysis shows high aerosol burden across the IGP region during the pre-monsoon season. The high aerosol loading days are identified based on a standardized AOD anomaly approach, from MODIS and MERRA-2. The frequency of high aerosol loading days over the western IGP is roughly twice that of the total number of high aerosol loading days over the eastern IGP. The area-averaged percentage differences in AOD between high aerosol loading days and normal days over western IGP is always higher, about 6–8%, than eastern IGP from Terra, Aqua and MERRA-2. The natural (mainly dust) and anthropogenic aerosols (particularly sulfate, black carbon and organic carbon) are majorly contributed to total AOD over western IGP and eastern IGP. Furthermore, the MERRA-2 and ERA5 composite surface and 850 hPa wind anomalies show that strong westerly winds dominate, transporting dust aerosols from arid regions to the western IGP. On the other hand, weak prevailing winds and background pre-monsoonal cyclonic circulations over eastern IGP favor the accumulation of regionally emitted aerosols. During high aerosol loading days, the decrease in ventilation coefficient indicates the high aerosol burden (less dispersion) over both the regions, leading to the deterioration of air quality. The enhanced aerosol loading induced potential atmospheric radiative forcing (19.78 Wm-2 over western IGP and 20.77 Wm-2 over eastern IGP) during high aerosol loading days compared to normal days (11.12 Wm-2 and 12.9 Wm-2). © 2021 Elsevier Ltd
关键词	Aerosol optical depth Atmospheric radiative forcing Indo-gangetic plain Polluted days
语种	英语
scopus关键词	Air quality; Atmospheric aerosols; Atmospheric radiation; Atmospheric thermodynamics; Deterioration; Dust; Loading; Optical properties; Radiometers; Sulfur compounds; Wind; Aerosol loading; Aerosol optical depths; Atmospheric radiative forcing; Dust aerosols; Indo-Gangetic Plains; Monsoon season; Polluted day; Pre-monsoon; Radiative forcings; Radiative impacts; Organic carbon; black carbon; organic carbon; sulfate; aerosol; aerosol property; black carbon; climatology; MODIS; optical depth; radiative forcing; ventilation; westerly; aerosol; air conditioning; air monitoring; air quality; air temperature; airflow; Article; atmospheric dispersion; atmospheric transport; data analysis; dust; frequency; geoaccumulation index; geographic mapping; heating; India; industrial area; monsoon climate; optical depth; pollution transport; precipitation; radiative forcing; rainy season; retention time; seasonal variation; soil erosion; soil moisture; soil temperature; spatial analysis; surface property; wind power; wind speed; Gangetic Plain
来源期刊	ATMOSPHERIC ENVIRONMENT
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/248127
作者单位	Department of Earth and Environmental Sciences, Indian Institute of Science Education and Research MohaliPunjab, India; Department of Civil Engineering, Indian Institute of Technology Madras, Chennai, Tamil Nadu, India; Atmospheric Sciences Division, Space Applications Center, ISRO, Gujrat, Ahmedabad, India
推荐引用方式 GB/T 7714	Shukla K.K.,Sarangi C.,Attada R.,et al. Characteristic dissimilarities during high aerosol loading days between western and eastern Indo-Gangetic Plain[J],2022,269.
APA	Shukla K.K.,Sarangi C.,Attada R.,&Kumar P..(2022).Characteristic dissimilarities during high aerosol loading days between western and eastern Indo-Gangetic Plain.ATMOSPHERIC ENVIRONMENT,269.
MLA	Shukla K.K.,et al."Characteristic dissimilarities during high aerosol loading days between western and eastern Indo-Gangetic Plain".ATMOSPHERIC ENVIRONMENT 269(2022).