Merged SAGE II, Ozone_cci and OMPS ozone profile dataset and evaluation of ozone trends in the stratosphere
Merged SAGE II, Ozone_cci and OMPS ozone profile dataset and evaluation of ozone trends in the stratosphere
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DOI：
10.5194/acp-17-12533-2017
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发表时间：
2017-10
影响因子：
6.3
通讯作者：
V. Sofieva;E. Kyrölä;M. Laine;J. Tamminen;D. Degenstein;A. Bourassa;C. Roth;D. Zawada;M. Weber
中科院分区：
文献类型：
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作者：
V. Sofieva;E. Kyrölä;M. Laine;J. Tamminen;D. Degenstein;A. Bourassa;C. Roth;D. Zawada;M. Weber
摘要。在本文中，我们提出了几个卫星仪器的臭氧剖面合并数据集：ERBS上的SAGE II， Envisat上的GOMOS， SCIAMACHY和MIPAS， Odin上的OSIRIS， SCISAT上的ACE-FTS和Suomi-NPP上的OMPS。合并后的数据集是在欧洲空间局气候变化倡议（Ozone_cci）的框架内创建的，目的是分析平流层臭氧的趋势。对于合并的数据集，我们使用了原始臭氧数据集的最新版本。来自各个仪器的数据集已经过广泛验证和相互比较；只有那些一致性很好的数据集，以及相对于配置的地面观测和彼此之间没有明显漂移的数据集，才用于合并。SAGE-CCI-OMPS长期数据集是通过计算和合并来自各个仪器的非季节性异常而创建的。合并后的SAGE-CCI-OMPS数据集包含1984年10月至2016年7月在90°S ~ 90°N和10 ~ 50 km的10°纬度波段上逐级1 km的臭氧反季节化异常。这个新创建的数据集用于通过多元线性回归评估平流层的臭氧趋势。在1997年以前，平流层上层臭氧呈负趋势，1997年以后呈正趋势。平流层上层的趋势在中纬度地区具有统计意义，表明臭氧正在恢复，正如从1990年代中期开始的平流层卤素减少和平流层变冷所预期的那样。
Abstract. In this paper, we present a merged dataset of ozone profiles from several satellite instruments: SAGE II on ERBS, GOMOS, SCIAMACHY and MIPAS on Envisat, OSIRIS on Odin, ACE-FTS on SCISAT, and OMPS on Suomi-NPP. The merged dataset is created in the framework of the European Space Agency Climate Change Initiative (Ozone_cci) with the aim of analyzing stratospheric ozone trends. For the merged dataset, we used the latest versions of the original ozone datasets. The datasets from the individual instruments have been extensively validated and intercompared; only those datasets which are in good agreement, and do not exhibit significant drifts with respect to collocated ground-based observations and with respect to each other, are used for merging. The long-term SAGE–CCI–OMPS dataset is created by computation and merging of deseasonalized anomalies from individual instruments. The merged SAGE–CCI–OMPS dataset consists of deseasonalized anomalies of ozone in 10° latitude bands from 90° S to 90° N and from 10 to 50 km in steps of 1 km covering the period from October 1984 to July 2016. This newly created dataset is used for evaluating ozone trends in the stratosphere through multiple linear regression. Negative ozone trends in the upper stratosphere are observed before 1997 and positive trends are found after 1997. The upper stratospheric trends are statistically significant at midlatitudes and indicate ozone recovery, as expected from the decrease of stratospheric halogens that started in the middle of the 1990s and stratospheric cooling.