Acta Photonica Sinica, Volume. 49, Issue 3, 0301002(2020)
Analysis of Total Columns of Greenhouse Gas Based on Direct Observation and Comparison with Satellite Data in Hefei
Observation of the total columns of H2O, CO2, CH4, and CO in Hefei is presented based on ground-based Fourier transform infrared spectrometer (EM27/SUN). The results show that, the XH2O and XCO2 vary greatly during the measurement period while the XCH4 and XCO vary slightly. The range of H2O and CO2 are 1 353.17~5 289.43 ppm and 409.22~415.05 ppm, at the same time, the standard deviation of XCH4 and XCO are in the order of 10-2. The average values of XH2O, XCO2, XCH4 and XCO are 2 109.10 ppm, 411.59 ppm, 1.87 ppm and 0.13 ppm respectively. The measured XCO2 and XCH4 are compared with the WACCM model and GOSAT satellite data, respectively. The comparison results show that the XCO2 and XCH4 calculated by WACCM model are relatively stable, with only slight changes near the average value. The GOSAT observations are slightly lower than those of EM27/SUN observations, with the relative deviations of XCO2 and XCH4 are 0.45% and 0.34%, respectively. The time series of the total column of XCO2 and XCH4 from 2010 to 2018 are analyzed by the GOSAT satellite data. It is found that the value of XCO2 increases from 390.83 ppm to 410.30 ppm, with a relative growth rate of 4.9%; the value of XCH4 increases from 1.802 ppm to 1.869 ppm, with a relative growth rate of 3.7%. The results may provide the theoretical basis for tracking the sources and sinks of greenhouse gases in Hefei and its surrounding areas.
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Dan-dan LIU, Yin-bo HUANG, Zhen-song CAO, Xing-ji LU, Yu-song SUN, Qian-si TU. Analysis of Total Columns of Greenhouse Gas Based on Direct Observation and Comparison with Satellite Data in Hefei[J]. Acta Photonica Sinica, 2020, 49(3): 0301002
Category: Atmospheric and Oceanic Optics
Received: Oct. 23, 2019
Accepted: Dec. 12, 2019
Published Online: Apr. 24, 2020
The Author Email: CAO Zhen-song (zscao@aiofm.ac.cn)