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Received：08 August 2018，
Published：07 March 2020
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中国地区大气CO
2
浓度对全球气候变化有重要的影响。本文基于日本GOSAT卫星短波红外CO
2
的长期观测数据，对2010年—2016年中国大陆上空CO
2
浓度的分布特征和变化趋势进行分析研究。利用高精度的地基TCCON站点CO
2
观测对GOSAT CO
2
数据进行精度验证，结果表明，GOSAT CO
2
具有较高的精度，相对TCCON CO
2
的偏差为－1.04±2.10 ppm，两者的相关系数高达0.90；利用中国地区7年的GOSAT CO
2
观测数据分析研究显示，CO
2
浓度高值主要分布在中国的浙江—江苏—安徽地区、京津冀地区和湖南—湖北—河南—陕西地区；截至2016年，中国大部地区CO
2
浓度超过400 ppm；中国大陆CO
2
平均浓度呈现明显的逐年增长趋势，从2010年的387.76 ppm增长到2016年的402.18 ppm，年增长率约为2.31 ppm/a，略高于同期全球平均水平。
Atmospheric CO
2
concentration over China has significant effects on the global climate change. To reliably predict the impact of atmospheric CO
2
on global climate change
it is necessary to clarify the distribution and variation of atmospheric CO
2
concentration. Based on long term short-wavelength infrared CO
2
dataset observed by GOSAT
the temporal variation and spatial distribution characteristics and variation trend of atmospheric CO
2
concentration was investigated and analysed over China during 2010 to 2016. To ensure the quality of GOSAT CO
2
dataset used in this paper
the GOSAT XCO
2
dataset was validated with high precise XCO
2
from ground-based TCCON sites. Multi-year mean of XCO
2
was illustrated to show the spatial heterogeneity of CO
2
concentration over China. Interannual variation and annual growth of XCO
2
was also presented and discussed. The results showed that GOSAT XCO
2
dataset was biased by -1.04±2.10 ppm with respect to TCCON XCO
2
and the correlation coefficient was 0.90 between them. Seven years (2010~2016) of GOSAT CO
2
dataset showed that high CO
2
concentrations were mainly located in Zhejiang-Jiangsu-Anhui region
Beijing-Tianjin-Hebei region
and Hunan-Hubei-Henan-Shanxi region in China. The CO
2
concentration reached 400 ppm over most regions in China until 2016. The annual average of CO
2
concentration showed an increase trend year by year over China
increasing from 387.76 in 2010 to 402.18 ppm in 2016. The annual growth rate of CO
2
concentration was evaluated to be 2.31 ppm/a during this period over China
which was slightly higher than the average in the world. This paper shows that the CO
2
concentration observations from satellites could provide some references for the climate change response strategies and atmospheric environment control.
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