Increasing carbon dioxide concentration in the upper atmosphere observed by SABER
Increasing carbon dioxide concentration in the upper atmosphere observed by SABER
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DOI：
10.1002/2015gl064696
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发表时间：
2015-09
影响因子：
5.2
通讯作者：
J. Yue;J. Russell;Yongxiao Jian;L. Rezac;R. Garcia;M. López‐Puertas;M. Mlynczak
中科院分区：
文献类型：
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作者：
J. Yue;J. Russell;Yongxiao Jian;L. Rezac;R. Garcia;M. López‐Puertas;M. Mlynczak
分析了2002至2014年间使用宽带发射辐射测量仪(SABER)探测大气所获得的二氧化碳测量结果，以揭示中间层和低热层中二氧化碳的增加速度。二氧化碳数据显示，在约80公里及以下，每十年有~5%的趋势，与在莫纳罗亚观测到的对流层趋势很好地一致。在80公里以上，SABER CO_2变化趋势大于低层大气，在110公里处达到每十年~12%。高层大气的较大相对趋势与大气化学实验傅里叶变换光谱仪(ACE-FTS)的结果一致。另一方面，由全大气社区气候模式推算的二氧化碳趋势在所有地方都保持在接近5%的水平。SABER仪器的空间覆盖范围使我们第一次能够分析二氧化碳趋势作为纬度的函数。这一趋势在北半球大于南半球80公里以上的中层顶。SABER和ACE-FTS之间的协议表明，在过去的13年里，高层大气中二氧化碳的增加速度远远超过了化学-气候模型所能解释的。
Carbon dioxide measurements made by the Sounding of the Atmosphere using Broadband Emission Radiometry (SABER) instrument between 2002 and 2014 were analyzed to reveal the rate of increase of CO2 in the mesosphere and lower thermosphere. The CO2 data show a trend of ~5% per decade at ~80 km and below, in good agreement with the tropospheric trend observed at Mauna Loa. Above 80 km, the SABER CO2 trend is larger than in the lower atmosphere, reaching ~12% per decade at 110 km. The large relative trend in the upper atmosphere is consistent with results from the Atmospheric Chemistry Experiment Fourier Transform Spectrometer (ACE‐FTS). On the other hand, the CO2 trend deduced from the Whole Atmosphere Community Climate Model remains close to 5% everywhere. The spatial coverage of the SABER instrument allows us to analyze the CO2 trend as a function of latitude for the first time. The trend is larger in the Northern Hemisphere than in the Southern Hemisphere mesopause above 80 km. The agreement between SABER and ACE‐FTS suggests that the rate of increase of CO2 in the upper atmosphere over the past 13 years is considerably larger than can be explained by chemistry‐climate models.