气候变化领域集成服务门户(CCPortal): Spatial and temporal variations of CO2 mole fractions observed at Beijing, Xianghe, and Xinglong in North China

CCPortal

DOI	10.5194/acp-21-11741-2021
	Spatial and temporal variations of CO2 mole fractions observed at Beijing, Xianghe, and Xinglong in North China
	Yang Y.; Zhou M.; Wang T.; Yao B.; Han P.; Ji D.; Zhou W.; Sun Y.; Wang G.; Wang P.
发表日期	2021
ISSN	1680-7316
起始页码	11741
结束页码	11757
卷号	21 期号:15
英文摘要	Atmospheric CO2 mole fractions are observed at Beijing (BJ), Xianghe (XH), and Xinglong (XL) in North China using Picarro G2301 cavity ring-down spectroscopy instruments. The measurement system is described comprehensively for the first time. The geographical distances among these three sites are within 200g km, but they have very different surrounding environments: BJ is inside the megacity; XH is in the suburban area; XL is in the countryside on a mountain. The mean and standard deviation of CO2 mole fractions at BJ, XH, and XL between October 2018 and September 2019 are 448.4±12.8, 436.0±9.2, and 420.6±8.2g ppm, respectively. The seasonal variations of CO2 at these three sites are similar, with a maximum in winter and a minimum in summer, which is dominated by the terrestrial ecosystem. However, the seasonal variations of CO2 at BJ and XH are more affected by human activities as compared to XL. Using CO2 at XL as the background, CO2 enhancements are observed simultaneously at BJ and XH. The diurnal variations of CO2 are driven by the boundary layer height, photosynthesis, and human activities at BJ, XH, and XL. We also compare the CO2 measurements at BJ, XH, and XL with five urban sites in the USA, and it is found that the CO2 mean concentration at BJ is the largest. Moreover, we address the impact of the wind on the CO2 mole fractions at BJ and XL. This study provides an insight into the spatial and temporal variations of CO2 mole fractions in North China. © Author(s) 2021.
语种	英语
scopus关键词	air quality; atmospheric pollution; carbon dioxide; carbon emission; concentration (composition); seasonal variation; winter; Beijing [China]; China; Hebei; Xianghe; Xinglong
来源期刊	ATMOSPHERIC CHEMISTRY AND PHYSICS
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/246676
作者单位	Shanghai Ecological Forecasting and Remote Sensing Center, Shanghai, China; CNRC and LAGEO, Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing, China; Royal Belgian Institute for Space Aeronomy, Brussels, Belgium; LAPC, Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing, China; LASG, Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing, China; MOC, China Meteorological Administration, Beijing, China; CEPS, University of Chinese Academy of Sciences, Beijing, China
推荐引用方式 GB/T 7714	Yang Y.,Zhou M.,Wang T.,et al. Spatial and temporal variations of CO2 mole fractions observed at Beijing, Xianghe, and Xinglong in North China[J],2021,21(15).
APA	Yang Y..,Zhou M..,Wang T..,Yao B..,Han P..,...&Wang P..(2021).Spatial and temporal variations of CO2 mole fractions observed at Beijing, Xianghe, and Xinglong in North China.ATMOSPHERIC CHEMISTRY AND PHYSICS,21(15).
MLA	Yang Y.,et al."Spatial and temporal variations of CO2 mole fractions observed at Beijing, Xianghe, and Xinglong in North China".ATMOSPHERIC CHEMISTRY AND PHYSICS 21.15(2021).