globalchange  > 气候减缓与适应
DOI: 10.1002/2017JD027409
Scopus记录号: 2-s2.0-85041717620
论文题名:
Characteristics of CO2 Concentration and Flux in the Beijing Urban Area
作者: Cheng X.L.; Liu X.M.; Liu Y.J.; Hu F.
刊名: Journal of Geophysical Research: Atmospheres
ISSN: 2169897X
出版年: 2018
卷: 123, 期:3
起始页码: 1785
结束页码: 1801
语种: 英语
英文关键词: atmospheric boundary layer ; CO2 concentration ; CO2 flux ; turbulence ; urban area ; wavelet transform
英文摘要: Since February 2012, CO2, H2O, and wind data at 10 Hz have been measured by the open-path eddy covariance systems at 8, 16, 47, 80, 140, 200, and 280 m above ground level on the 325 m Beijing meteorological tower. Analysis of the data from 2013 to 2016 indicates that the annual averaged CO2 concentration increased and the local and regional CO2 emission decreased with the sequestration of background CO2 concentration. The maximum values occurred during winter, and the minimum values occurred during summer. During spring, summer, and autumn, there was a constant CO2 flux layer from 47 m to 140 m. However, during winter, CO2 flux increased with height, and the maximum appeared at approximately 140 m and then decreased with height. Above 47 m, the CO2 fluxes were represented as the net efflux, and below 16 m, the fluxes were near zero or a net uptake. At all observed heights, the diurnal variation in the CO2 concentration displayed a clear cycle with a peak corresponding to the morning transportation rush hour. The local wavelet power spectra of the CO2 concentration, CO2 flux, and other meteorological elements identified significant cross-wavelet powers near the 24 h and 365 day bands for the CO2 concentration and flux with temperature, wind speed, friction velocity, and turbulent kinetic energy. ©2018. American Geophysical Union. All Rights Reserved.
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/114459
Appears in Collections:气候减缓与适应

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作者单位: State Key Laboratory of Atmospheric Boundary Layer Physics and Atmospheric Chemistry, Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing, China; College of Earth Sciences, University of Chinese Academy of Sciences, Beijing, China; Key Laboratory of Cloud Precipitation Physics and Severe Storms, Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing, China; Institute of Urban Meteorology, China Meteorological Administration, Beijing, China

Recommended Citation:
Cheng X.L.,Liu X.M.,Liu Y.J.,et al. Characteristics of CO2 Concentration and Flux in the Beijing Urban Area[J]. Journal of Geophysical Research: Atmospheres,2018-01-01,123(3)
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