Temporal and spatial analysis of global GOSAT XCO2 variations characteristics

Qian Wang; Liping Lei; Da Liu; Min Liu; Xiuchun Qin; Baoming Sun

doi:10.1117/12.2204827

6 August 2015 Temporal and spatial analysis of global GOSAT XCO₂ variations characteristics

Qian Wang, Liping Lei, Da Liu, Min Liu, Xiuchun Qin, Baoming Sun

Proceedings Volume 9669, Remote Sensing of the Environment: 19th National Symposium on Remote Sensing of China; 96690T (2015) https://doi.org/10.1117/12.2204827
Event: Remote Sensing of the Environment: 19th National Symposium on Remote Sensing of China, 2014, Xian City, China

Abstract

CO₂ is one of the most important greenhouse gases due to its selective absorption of long wave radiation from the Earth’s surface. In this paper, we use the column average dry air mole fraction of CO₂ (XCO₂) data from the Japanese GOSAT satellite to conduct a comprehensive and systematic analysis of temporal and spatial distribution of XCO₂. This includes: (1) analysis of seasonal change characteristics of XCO₂ data; and (2) comparative analysis of the northern and southern hemispheres carbon dioxide concentration at different latitudes. The results show that (1) from 2010 to 2013, atmospheric XCO₂ significantly increased each year. The southern hemisphere's annual averages of XCO₂ from 2010 to 2012 were 385.2 ppm, 387.3 ppm, and 389.1 ppm, while the average annual values for the northern hemisphere from 2010 to 2012 were 387.8 ppm, 390.0 ppm, and 391.7 ppm. The annual XCO₂ in northern and southern hemispheres exhibited growth rates of 1-2 ppm per year. (2) The results show seasonal change trends: winter months displayed higher XCO₂. Regarding the global spatial distribution of XCO₂, the results show that the total XCO₂ in the northern hemisphere is higher than that in the southern hemisphere. (3) The growth of global XCO₂ in 2011 and 2012 was 1.9 ppm/yr and 2.1 ppm/yr. These values are in accordance with the growth rates of 1.9 ppm/yr and 2.2 ppm/yr reported in the World Meteorological Organization's greenhouse gas bulletin.

Citation Download Citation

Qian Wang, Liping Lei, Da Liu, Min Liu, Xiuchun Qin, and Baoming Sun "Temporal and spatial analysis of global GOSAT XCO₂ variations characteristics", Proc. SPIE 9669, Remote Sensing of the Environment: 19th National Symposium on Remote Sensing of China, 96690T (6 August 2015); https://doi.org/10.1117/12.2204827

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