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首页> 外文期刊>Atmospheric chemistry and physics >Re-analysis of ground-based microwave ClO measurements from Mauna Kea, 1992 to early 2012
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Re-analysis of ground-based microwave ClO measurements from Mauna Kea, 1992 to early 2012

机译:重新分析1992年至2012年初Mauna Kea的地面微波ClO测量值

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We present a re-analysis of upper stratospheric ClO measurements from the ground-based millimeter-wave instrument from January 1992 to February 2012. These measurements are made as part of the Network for the Detection of Atmospheric Composition Change (NDACC) from Mauna Kea, Hawaii, (19.8 N, 204.5 E). Here, we use daytime and nighttime measurements together to form a day-night spectrum, from which the difference in the day and night profiles is retrieved. These results are then compared to the day-night difference profiles from the Upper Atmosphere Research Satellite (UARS) and Aura Microwave Limb Sounder (MLS) instruments. We also compare them to our previous analyses of the same data, in which we retrieved the daytime ClO profile. The major focus will be on comparing the year-to-year and long-term changes in ClO derived by the two analysis methods, and comparing these results to the long-term changes reported by others. We conclude that the re-analyzed data set has less short-term variability and exhibits a more constant long-term trend that is more consistent with other observations. Data from 1995 to 2012 indicate a linear decline of mid-stratospheric ClO of 0.64 ± 0.15% yr-1 (2σ).
机译:我们对从1992年1月至2012年2月的地面毫米波仪器对高平流层ClO的测量值进行了重新分析。这些测量值是莫纳克亚山脉大气成分变化检测网络(NDACC)的一部分,夏威夷(19.8 N,204.5 E)。在这里,我们将白天和夜晚的测量值一起使用,以形成一个昼夜光谱,从中检索出白天和夜晚轮廓的差异。然后将这些结果与上层大气研究卫星(UARS)和Aura微波探空仪(MLS)仪器的昼夜差异曲线进行比较。我们还将它们与以前对相同数据的分析进行比较,在该分析中我们检索了白天的ClO配置文件。主要重点将放在比较两种分析方法得出的ClO的年度变化和长期变化,并将这些结果与其他人报告的长期变化进行比较。我们得出的结论是,重新分析的数据集具有较小的短期变异性,并显示出更稳定的长期趋势,与其他观察结果更加一致。 1995年至2012年的数据表明,平流层中层ClO线性下降0.64±0.15%yr-1(2σ)。

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