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Geoscientific Instrumentation, Methods and Data Systems An interactive open-access journal of the European Geosciences Union
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Discussion papers
https://doi.org/10.5194/gi-2018-43
© Author(s) 2018. This work is distributed under
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/gi-2018-43
© Author(s) 2018. This work is distributed under
the Creative Commons Attribution 4.0 License.

Research article 03 Dec 2018

Research article | 03 Dec 2018

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This discussion paper is a preprint. It is a manuscript under review for the journal Geoscientific Instrumentation, Methods and Data Systems (GI).

Continuous observation of Stable Isotopes of Water Vapor in Atmosphere Using High-Resolution FTIR

Chang-Gong Shan1,2, Wei Wang2, Cheng Liu2,3,4, You-Wen Sun2, Yuan Tian2, and Isamu Morino5 Chang-Gong Shan et al.
  • 1School of Environment science and Optoelectronic Technology, University of Science and Technology of China, Hefei, 230000, China
  • 2Key Laboratory of Environmental Optics and Technology, Anhui Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Hefei, 230031, China
  • 3University of Science and Technology of China, Hefei, 230000, China
  • 4Center for Excellence in Urban Atmospheric Environment, Institute of Urban Environment, Chinese Academy of Sciences, Xiamen, 361021, China
  • 5Satellite Observation Center, National Institute for Environmental Studies, Tsukuba, 305-8506, Japan

Abstract. Observations of stable isotopes of water vapor provide important information for water cycle. The volume mixing ratios (VMR) of H2O (XH2O) and HDO (XHDO) have been retrieved based on a high-resolution ground-based Fourier transform infrared spectroscopy (FTIR) at Hefei site, and the isotopic composition δD was calculated. Time series of XH2O were compared with the Greenhouse gases Observing Satellite (GOSAT) data, showing a good agreement. The daily averaged δD ranges from −17.02‰ to −282.3‰ between September 2015 and September 2016. Also, the relationships of meteorological parameters with stable isotopologue were analyzed. δD values showed an obvious positive correlation with temperature and ln(XH2O) and a weak correlation with relative humidity. Further, 51.35% of airmass at Hefei site comes from the southeast of China, and the main potential sources of δD are in the east of China over the observation period based on the back trajectories model. Furthermore, the δD values of evapotranspiration were calculated based on Keeling plot. Observations of the stable isotopes of water vapor by high-resolution ground-based FTIR provide information on study of the variation of the atmospheric water vapor at Hefei site.

Chang-Gong Shan et al.
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Observations of the stable isotopes of water vapor by high-resolution ground-based Fourier transform infrared spectroscopy (FTIR) provide information on study of the variation of the atmospheric water vapor at Hefei site. In this paper, the percentage of atmospheric H2O(XH2O) and HDO (XHDO) have been retrieved based on a high-resolution ground-based FTIR at Hefei site, and also calculated the stable isotopes of water composition δD. The time series of XH2O were compared with the Greenhouse gase.
Observations of the stable isotopes of water vapor by high-resolution ground-based Fourier...
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