Understanding temporary reduction in atmospheric pollution and its impacts on coastal aquatic system during COVID-19 lockdown: a case study of South Asia

doi:10.1080/19475705.2021.1885503

	Understanding temporary reduction in atmospheric pollution and its impacts on coastal aquatic system during COVID-19 lockdown: a case study of South Asia
	Shafeeque, Muhammad 1,2,3; Arshad, Arfan 1,3,4; Elbeltagi, Ahmed 5,6; Sarwar, Abid 3; Pham, Quoc Bao 7,8; Khan, Shahbaz Nasir 9; Dilawar, Adil 1,10; Al-Ansari, Nadhir 11
刊名	GEOMATICS NATURAL HAZARDS & RISK
	2021
卷号	12 期号:1 页码:560-580
关键词	COVID-19 lockdown human mobility NO2 emission aerosol optical depth chlorophyll-a land runoff
ISSN号	1947-5705
DOI	10.1080/19475705.2021.1885503
通讯作者	Pham, Quoc Bao(phambaoquoc@duytan.edu.vn)
英文摘要	The strict lockdown measures not only contributed to curbing the spread of COVID-19 infection, but also improved the environmental conditions worldwide. The main goal of the current study was to investigate the co-benefits of COVID-19 lockdown on the atmosphere and aquatic ecological system under restricted anthropogenic activities in South Asia. The remote sensing data (a) NO2 emissions from the Ozone Monitoring Instrument (OMI), (b) Aerosol Optical Depth (AOD) from the Moderate Resolution Imaging Spectroradiometer (MODIS), and (c) chlorophyll (Chl-a) and turbidity data from MODIS-Aqua Level-3 during Jan-Oct (2020) were analyzed to assess the changes in air and water pollution compared to the last five years (2015-2019). The interactions between the air and water pollution were also investigated using overland runoff and precipitation in 2019 and 2020 at a monthly scale to investigate the anomalous events, which could affect the N loading to coastal regions. The results revealed a considerable drop in the air and water pollution (30-40% reduction in NO2 emissions, 45% in AOD, 50% decline in coastal Chl-a concentration, and 29% decline in turbidity) over South Asia. The rate of reduction in NO2 emissions was found the highest for Lahore (32%), New Delhi (31%), Ahmadabad (29%), Karachi (26%), Hyderabad (24%), and Chennai (17%) during the strict lockdown period from Apr-Jun, 2020. A positive correlation between AOD and NO2 emissions (0.23-0.50) implies that a decrease in AOD is attributed to a reduction in NO2. It was observed that during strict lockdown, the turbidity has decreased by 29%, 11%, 16%, and 17% along the coastal regions of Karachi, Mumbai, Calcutta, and Dhaka, respectively, while a 5-6% increase in turbidity was seen over the Madras during the same period. The findings stress the importance of reduced N emissions due to halted fossil fuel consumption and their relationships with the reduced air and water pollution. It is concluded that the atmospheric and hydrospheric environment can be improved by implementing smart restrictions on fossil fuel consumption with a minimum effect on socioeconomics in the region. Smart constraints on fossil fuel usage are recommended to control air and water pollution even after the social and economic activities resume business-as-usual scenario.
WOS研究方向	Geology ; Meteorology & Atmospheric Sciences ; Water Resources
语种	英语
出版者	TAYLOR & FRANCIS LTD
WOS记录号	WOS:000619641500001
内容类型	期刊论文
源URL	[http://ir.igsnrr.ac.cn/handle/311030/160691]
专题	中国科学院地理科学与资源研究所
通讯作者	Pham, Quoc Bao
作者单位	1.Univ Chinese Acad Sci, Beijing, Peoples R China 2.Chinese Acad Sci, Key Lab Ecosyst Network Observat & Modelling, Inst Geog Sci & Nat Resources Res, Beijing, Peoples R China 3.Univ Agr Faisalabad, Dept Irrigat & Drainage, Fac Agr Engn, Faisalabad, Pakistan 4.Chinese Acad Sci, Aerosp Informat Res Inst, Key Lab Digital Earth Sci, Beijing, Peoples R China 5.Mansoura Univ, Agr Engn Dept, Fac Agr, Mansoura, Egypt 6.Zhejiang Univ, Coll Environm & Resource Sci, Hangzhou, Peoples R China 7.Duy Tan Univ, Inst Res & Dev, Danang, Vietnam 8.Duy Tan Univ, Fac Environm & Chem Engn, Danang, Vietnam 9.Univ Agr Faisalabad, Dept Struct & Environm Engn, Fac Agr Engn, Faisalabad, Pakistan 10.Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, LREIS, Beijing, Peoples R China
推荐引用方式 GB/T 7714	Shafeeque, Muhammad,Arshad, Arfan,Elbeltagi, Ahmed,et al. Understanding temporary reduction in atmospheric pollution and its impacts on coastal aquatic system during COVID-19 lockdown: a case study of South Asia[J]. GEOMATICS NATURAL HAZARDS & RISK,2021,12(1):560-580.
APA	Shafeeque, Muhammad.,Arshad, Arfan.,Elbeltagi, Ahmed.,Sarwar, Abid.,Pham, Quoc Bao.,...&Al-Ansari, Nadhir.(2021).Understanding temporary reduction in atmospheric pollution and its impacts on coastal aquatic system during COVID-19 lockdown: a case study of South Asia.GEOMATICS NATURAL HAZARDS & RISK,12(1),560-580.
MLA	Shafeeque, Muhammad,et al."Understanding temporary reduction in atmospheric pollution and its impacts on coastal aquatic system during COVID-19 lockdown: a case study of South Asia".GEOMATICS NATURAL HAZARDS & RISK 12.1(2021):560-580.