气候变化领域集成服务门户(CCPortal): Temporal characteristics of carbon dioxide and ozone over a rural-cropland area in the Yangtze River Delta of eastern China

CCPortal

DOI	10.1016/j.scitotenv.2020.143750
	Temporal characteristics of carbon dioxide and ozone over a rural-cropland area in the Yangtze River Delta of eastern China
	Duan Z.; Yang Y.; Wang L.; Liu C.; Fan S.; Chen C.; Tong Y.; Lin X.; Gao Z.
发表日期	2021
ISSN	489697
卷号	757
英文摘要	In this study, rural atmospheric carbon dioxide (CO2) and ozone (O3) were measured from January 2015 to December 2018 to investigate characteristics of greenhouse gases in eastern China. Results showed that the annual average CO2 (O3) concentration in 2018 decreased by 2% (increased by 19%) when compared with that in 2015. CO2 concentrations exhibited monthly variability, peaking in February (443.7 ppm) and reaching their lowest levels in July (363.0 ppm); whereas, monthly O3 showed a bimodal pattern with peaks in June (51.3 ppb) and September (34.5 ppb). Regarding the diurnal variation, the maximum CO2 (O3) concentration occurred at nighttime (in the daytime) and a minimum CO2 (O3) in the daytime (at nighttime). As demonstrated by correlation analysis, CO2 and O3 variations were partly modulated by NOx and PM2.5. Furthermore, CO2 showed significant positive correlations with relative humidity in winter, while O3 showed strong positive correlations with temperature in spring. CO2 was accumulated from local sources under calm conditions (< 2 m s−1) and derived from remote sources at high wind speeds (> 4 m s−1), while O3 concentrations were peaking at medium wind speeds of 2–4 m s−1. CO2 was found to derive from long-distance (short-distance transport) transport in spring (the other three seasons), whereas O3 is mainly from long-distance (short-distance) transport in winter (the other three seasons). This work sheds light on the temporal characteristics of CO2 and O3, which has important implications for implementing practices to mitigate source emissions over cropland areas. © 2020 Elsevier B.V.
英文关键词	CO2; Meteorological conditions; Rural-cropland area; Temporal variations; Tropospheric O3
scopus关键词	Atmospheric chemistry; Atmospheric humidity; Greenhouse gases; Ozone; Rural areas; Wind; Atmospheric carbon dioxide; Calm conditions; CO2 concentration; Correlation analysis; Diurnal variation; Positive correlations; Temporal characteristics; Yangtze river delta; Carbon dioxide; carbon dioxide; nitrogen oxide; ozone; agricultural land; atmospheric chemistry; carbon dioxide; greenhouse gas; meteorology; ozone; rural area; temporal variation; troposphere; air temperature; Article; bioaccumulation; China; concentration (parameter); controlled study; cropland; greenhouse gas; humidity; particulate matter; precipitation; priority journal; rural area; seasonal variation; temperature; temporal analysis; trend study; vegetation; China; Yangtze Delta
来源期刊	Science of the Total Environment
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/177237
作者单位	Climate and Weather Disasters Collaborative Innovation Center, School of Atmospheric Physics, School of Atmospheric Physics, Nanjing University of Information Science and Technology, Nanjing, 210044, China; State Key Laboratory of Atmospheric Boundary Layer Physics and Atmospheric Chemistry, Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing, 100029, China; School of Remote Sensing and Geomatics Engineering, Nanjing University of Information Science and Technology, Nanjing, 210044, China; Shanghai Typhoon Institute, CMA, Shanghai, 200030, China; Shouxian Meteorological Bureau of Anhui Province, Shouxian, 23220, China
推荐引用方式 GB/T 7714	Duan Z.,Yang Y.,Wang L.,et al. Temporal characteristics of carbon dioxide and ozone over a rural-cropland area in the Yangtze River Delta of eastern China[J],2021,757.
APA	Duan Z..,Yang Y..,Wang L..,Liu C..,Fan S..,...&Gao Z..(2021).Temporal characteristics of carbon dioxide and ozone over a rural-cropland area in the Yangtze River Delta of eastern China.Science of the Total Environment,757.
MLA	Duan Z.,et al."Temporal characteristics of carbon dioxide and ozone over a rural-cropland area in the Yangtze River Delta of eastern China".Science of the Total Environment 757(2021).