气候变化领域集成服务门户(CCPortal): A long-term analysis of atmospheric black carbon MERRA-2 concentration over China during 1980

CCPortal

DOI	10.1016/j.atmosenv.2021.118662
	A long-term analysis of atmospheric black carbon MERRA-2 concentration over China during 1980–2019
	Cao S.; Zhang S.; Gao C.; Yan Y.; Bao J.; Su L.; Liu M.; Peng N.; Liu M.
发表日期	2021
ISSN	1352-2310
卷号	264
英文摘要	Black carbon (BC), an important component of atmospheric aerosols, has a great influence on regional and global radiation balance, climate and human health due to its small particle size, large specific surface area and radiation forcing. The long-term variation of atmospheric BC over China during 1980–2019 was investigated through MERRA-2 reanalysis data. MERRA-2 BC generally presented a good correlation (average R = 0.61) with 852 monthly samples from ground-based observations at 64 stations around China. In recent 40 years, the annual-averaged atmospheric BC concentration derived from MERRA-2 reanalysis data was 1.10 ± 0.22 μg/m3, with an average annual growth rate of 1.52%. The monthly BC concentrations showed a "U"-shaped trend. Based on the Mann-Kendall trend analysis, the BC concentration can be roughly divided into three stages: (1) the “low value” stage with slow growth rate (1.68%) (1980–1999, 0.91 ± 0.10 μg/m3), (2) the fluctuating “median value” stage with high growth rate (4.44%) (2000–2007, 1.28 ± 0.13 μg/m3), and (3) the “high value” stage with slow downtrend (−0.87%) (2008–2019, 1.32 ± 0.06 μg/m3). Peak times and multi-year average growth rates of BC concentration and emission were not synchronized. The spatial distribution, dividing by the Hu Line, a line dividing the population density and urbanization of China, formed three BC high-value areas in Sichuan Basin, Northern Henan area and Beijing-Tianjin-Hebei (BTH). The altitude where the concentration of BC increased fastest at an average annual growth rate of 3.47% during 1980–2019 was between 0 and 500 m. The growth rate of BC concentration was close to zero as the altitude increased. During the past 40 years, significant overall uptrends were detected in MERRA-2 BC concentration with Mann-Kendall trend analysis at pixel scale, especially during 1980–1999 and 2000–2007. This increasing trend was more obvious in the eastern Hu Line. Whereas, a downward trend was appeared in the plains and basins of southeast China during 2008–2019. © 2021 Elsevier Ltd
关键词	BC concentration China Mann-Kendall trend analysis MERRA-2
语种	英语
scopus关键词	Atmospheric aerosols; Atmospheric radiation; Carbon; Particle size analysis; Population statistics; Average annual growth rates; Black carbon; Black carbon concentration; Carbon concentrations; China; Mann-kendall trend analyse; Mann-Kendall trends; MERRA-2; Reanalysis; Trend analysis; Particle size; black carbon; aerosol; black carbon; carbon emission; concentration (composition); growth rate; population density; radiative forcing; surface area; trend analysis; urbanization; altitude; Article; atmosphere; China; concentration (parameter); controlled study; growth rate; particle size; radiation; surface area; urbanization; China; Hebei; Sichuan Basin
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/248241
作者单位	Shanghai Key Lab for Urban Ecological Processes and Eco-restoration, School of Ecological and Environmental Sciences, East China Normal University, Shanghai, 200241, China; Zhejiang Tiantong Forest Ecosystem National Observation and Research Station, School of Ecological and Environmental Sciences, East China Normal University, Shanghai, 200241, China; Institute of Eco-Chongming, Shanghai, 200062, China
推荐引用方式 GB/T 7714	Cao S.,Zhang S.,Gao C.,等. A long-term analysis of atmospheric black carbon MERRA-2 concentration over China during 1980–2019[J],2021,264.
APA	Cao S..,Zhang S..,Gao C..,Yan Y..,Bao J..,...&Liu M..(2021).A long-term analysis of atmospheric black carbon MERRA-2 concentration over China during 1980–2019.ATMOSPHERIC ENVIRONMENT,264.
MLA	Cao S.,et al."A long-term analysis of atmospheric black carbon MERRA-2 concentration over China during 1980–2019".ATMOSPHERIC ENVIRONMENT 264(2021).