Variations in satellite-derived carbon dioxide over different regions of China from 2003 to 2011
Variations in satellite-derived carbon dioxide over different regions of China from 2003 to 2011
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DOI：
10.1016/j.atmosenv.2016.11.032
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发表时间：
2017-02
影响因子：
5
通讯作者：
Yuyue Xu;C. Ke;W. Zhan;W. Zhan;Haidong Li;L. Yao
中科院分区：
文献类型：
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作者：
Yuyue Xu;C. Ke;W. Zhan;W. Zhan;Haidong Li;L. Yao
CO_2摩尔分数(XCO_2)在全球或全国范围内的变化已被广泛研究，但由于经济发展阶段和气候差异的巨大差异，中国内部的区域差异尚不清楚。本文分析了2003年至2011年中国及其6个地理区域XCO2的月变化和年变化。使用了大气红外测深仪(AIRS)数据，该数据主要在对流层中层敏感。2003年至2011年，XCO2的年平均浓度从375.7升至392.5升至392.5升至3.5ppm，与2003年至2008年(升2.09亿ppm/年)相近。然而，针对中国的不同地区，有两项新的发现。首先，中国北部的XCO_2增长率及其季节变幅高于中国南部。2003-2011年，XCO2在东北、北部和西北部的增长率分别为2.18、2.17和2.13亿ppm/年，而在东南部、中部和西南部的增长率分别为2.03、2.05和2.09ppm/年。东北和北部地区的CO2季节波动大于其他地区。2003年-2011年中国不同区域对流层中层月平均XCO2最高值出现在4~5月，最低值出现在中国南部9月和中国北部1月。这些结果为了解中国体内XCO2的区域差异提供了有价值的见解。
Variations of CO2mole fraction (XCO2) on a global or country-wide scale have been widely examined, while the regional differences within China remain unclear because of the huge differences in the stage of economic development and climatic diversities. In this study, the variations of monthly and yearly XCO2from 2003 to 2011 are analyzed for the entire China and its six geographical regions. Atmospheric Infrared Sounder (AIRS) data, which are mainly sensitive in the mid-troposphere, were used. During 2003–2011, the mean annual XCO2increased from 375.7 ± 3.3 to 392.5 ± 3.5 ppm, at a rate of +2.10 ppm/year, which is similar to the previous rate during 2003–2008 (+2.09 ppm/year). However, there are two new findings for different regions of China. First, the XCO2growth rate and its seasonal amplitude were higher in Northern China than in Southern China. The growth rates of XCO2over North-East, North, and North-West during 2003–2011 are 2.18, 2.17, and 2.13 ppm/year, respectively, while they are 2.03, 2.05, and 2.09 ppm/year over South-East, Central, and South-West, respectively. The seasonal CO2fluctuations over the North-East and North are larger than other regions. Second, the highest monthly mean XCO2of mid-troposphere occurs during April to May for different regions of China in 2003–2011, while the lowest XCO2is September for southern China and January for northern China. These results offer valuable insights into the regional differences of XCO2within China.