AbstractHigh-accuracy and continuous ship-based cavity ring-down spectroscopy was used to simultaneously measure the mixing ratios of the carbon dioxide and methane in the China sea-shelf boundary layer firstly, from 22 March to 2 April, 2013. The mixing ratios of CO2 and CH4 ranged from 397.40 μmol•mol−1 to 432.40 μmol•mol−1 and from 1812.8 nmol•mol−1 to 2068.7 nmol•mol−1, respectively. Measurement data showed latitudinal distributions, with a slight fluctuation between 35.52°N and 22.00°N, but a sharp decline from 22.00°N to 20.50°N. This distribution was not only the result of air mass transport from the Asian continent and Pacific Ocean induced by winter monsoon and trade winds, but also by air-sea exchange and atmospheric chemical processes. Moreover, mixing ratios of CO2 and CH4 showed temporal and spatial correlation, which was possibly due to the effects of multi-sources air mass and their mixed status.
Journal of Atmospheric and Oceanic Technology – American Meteorological Society
Published: Sep 1, 2017
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