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| Titel |
In situ measurement of atmospheric CO2 at the four WMO/GAW stations in China |
| VerfasserIn |
S. X. Fang, L. X. Zhou, P. P. Tans, P. Ciais, M. Steinbacher, L. Xu, T. Luan |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
1680-7316
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| Digitales Dokument |
URL |
| Erschienen |
In: Atmospheric Chemistry and Physics ; 14, no. 5 ; Nr. 14, no. 5 (2014-03-12), S.2541-2554 |
| Datensatznummer |
250118476
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| Publikation (Nr.) |
 copernicus.org/acp-14-2541-2014.pdf |
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| Zusammenfassung |
| Atmospheric carbon dioxide (CO2) mole fractions were continuously
measured from January 2009 to December 2011 at four atmospheric
observatories in China using cavity ring-down spectroscopy instruments. The
stations are Lin'an (LAN), Longfengshan (LFS), Shangdianzi (SDZ), and
Waliguan (WLG), which are regional (LAN, LFS, SDZ) or global (WLG)
measurement stations of the World Meteorological Organization's Global
Atmosphere Watch program (WMO/GAW). LAN is located near the megacity of
Shanghai, in China's economically most developed region. LFS is in a forest
and rice production area, close to the city of Harbin in northeastern China.
SDZ is located 150 km northeast of Beijing. WLG, hosting the longest record
of measured CO2 mole fractions in China, is a high-altitude site in
northwestern China recording background CO2 concentration. The CO2
growth rates are 3.7 ± 1.2 ppm yr−1 for LAN, 2.7 ± 0.8 ppm yr−1
for LFS, 3.5 ± 1.6 ppm yr−1 for SDZ, and 2.2 ± 0.8 ppm yr−1
(1σ) for WLG during the period of 2009 to 2011.
The highest annual mean CO2 mole fraction of 404.2 ± 3.9 ppm was
observed at LAN in 2011. A comprehensive analysis of CO2 variations,
their diurnal and seasonal cycles as well as the analysis of the influence
of local sources on the CO2 mole fractions allows a characterization of
the sampling sites and of the key processes driving the CO2 mole
fractions. These data form a basis to improve our understanding of
atmospheric CO2 variations in China and the underlying fluxes using
atmospheric inversion models. |
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