《Table 2 Intercomparison between the ground-based observations and AIRS-retrieved data from January2

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《全球对流层中层二氧化碳柱浓度数据集(2003–2015)》

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It can be seen from Figure 3 and Table 2 that the ground-based CO2 concentration agrees well with the AIRS satellite–retrieved data.The AIRS data accurately reflect the CO2 concentration in the mid-troposphere.The annual growth rate of CO2 from the satellite is close to that of the ground-based stations.The maximum correlation coefficient（0.978）is at Mauna Loa，while the lowest（0.754）is at Sonnblick，and all the coefficients of the five stations pass the 99.9%confidence level.