气候变化领域集成服务门户(CCPortal): Temporal patterns of remote-sensed tropospheric carbon dioxide and methane over an urban site in Malawi; Southeast Africa: Implications for climate effects

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DOI	10.1016/j.apr.2021.02.005
	Temporal patterns of remote-sensed tropospheric carbon dioxide and methane over an urban site in Malawi; Southeast Africa: Implications for climate effects
	Nyasulu M.; Haque M.M.; Kumar K.R.; Banda N.; Ayugi B.; Uddin M.J.
发表日期	2021
ISSN	13091042
起始页码	125
结束页码	135
卷号	12 期号:3
英文摘要	Carbon dioxide (CO2) and Methane (CH4) are considered the most crucial climate forcing greenhouse gases due to their significant impacts on climate systems. The present study is aimed at analyzing the long-term (2004–2016) concentration patterns of CO2 and CH4 over Malawi located in Southeast Africa using the observations from Atmospheric Infrared Sounding (AIRS). The study found an annual increase concentration of CO2 and CH4, with a rate of 7.08% and 1.66%, respectively; whereas, the respective concentration levels of CO2 and CH4 in 2016 were noted as >400 ppm and >750 ppb, which is comparable to that reported by IPCC (2014) over the globe. The monthly and seasonal analyses revealed that high patterns are associated with biomass burning season, changes in vegetation cover, and long-range transport. The two trace gases were seasonally correlated with carbon-containing compounds produced from incomplete combustion and biomass burning. The trace gases and pollutants are emitted from the burning of crop residues during the harvesting season, besides, open burning of forests and vehicular emissions. The present study also detected a seasonal increase in CO2 and CH4 concentrations during JJA and SON seasons. The temperature (T °C) exhibited profound correlation with CO2 (r = 0.75, p < 0.01) and CH4 (r = 0.80, p < 0.01) during the pollution peak season of SON. Moreover, CO2 and CH4 showed significant positive correlation with cloud top temperature (r = 0.56, p < 0.05 and r = 0.74, p < 0.01, respectively) and negative correlation with cloud fraction (r = −0.55, p < 0.05 and r = −0.69, p < 0.01, respectively) during SON, imply extensive climatic effect by the trace gases during high pollution season. The backward air mass trajectories divulge a contribution of distant produced pollutants from neighboring Mozambique, Madagascar Islands, and the South American continent. The major sinks of tropospheric CO2 and CH4 observed from the present study are precipitation and vegetation. © 2021 Turkish National Committee for Air Pollution Research and Control
英文关键词	Biomass burning; Carbon dioxide; Climatology; HYSPLIT; Malawi; Methane
来源期刊	Atmospheric Pollution Research
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/177228
作者单位	Yale-NUIST Center on Atmospheric Environment, International Joint Laboratory on Climate and Environment Change (ILCEC), Nanjing University of Information Science & Technology, Nanjing, 210044, China; School of Applied Meteorology, Nanjing University of Information Science and Technology, Nanjing, 210044, China; Jiangsu Key Laboratory of Atmospheric Environment and Pollution Control, Jiangsu Collaborative Innovation Center of Atmospheric Environment and Equipment Technology, School of Environmental Science and Engineering, Nanjing University of Information Science & Technology, Nanjing, 210044, China; Department of Climate Change and Meteorological Services (DCCMS)Malawi, Blantyre, P.O. Box 1808, Malawi; Department of Physics, Koneru Lakshmaiah Education Foundation (KLEF), Vaddeswaram, Guntur, Andhra Pradesh 522 502, India; Key Laboratory of Meteorological Disaster, Ministry of Education (KLME)/Joint International Research Laboratory of Climate and Environment Change (ILCEC)/Collaborative Innovation Cente...
推荐引用方式 GB/T 7714	Nyasulu M.,Haque M.M.,Kumar K.R.,et al. Temporal patterns of remote-sensed tropospheric carbon dioxide and methane over an urban site in Malawi; Southeast Africa: Implications for climate effects[J],2021,12(3).
APA	Nyasulu M.,Haque M.M.,Kumar K.R.,Banda N.,Ayugi B.,&Uddin M.J..(2021).Temporal patterns of remote-sensed tropospheric carbon dioxide and methane over an urban site in Malawi; Southeast Africa: Implications for climate effects.Atmospheric Pollution Research,12(3).
MLA	Nyasulu M.,et al."Temporal patterns of remote-sensed tropospheric carbon dioxide and methane over an urban site in Malawi; Southeast Africa: Implications for climate effects".Atmospheric Pollution Research 12.3(2021).