Global consistency check of AIRS and IASI total CO2 column concentrations using WDCGG ground-based measurements
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- 作者：Anyuan Diao ; Jiong Shu ; Ci Song ; Wei Gao
- 关键词：CO2 ; consistency check ; AIRS ; IASI ; WDCGG
- 刊名：Frontiers of Earth Science
- 出版年：2017
- 出版时间：March 2017
- 年：2017
- 卷：11
- 期：1
- 页码：1-10
- 全文大小：
- 刊物主题：Earth Sciences, general;
- 出版者：Higher Education Press
- ISSN：2095-0209
- 卷排序：11
文摘
This article describes a global consistency check of CO2 satellite retrieval products from the Atmospheric Infrared Sounder (AIRS) and Infrared Atmospheric Sounding Interferometer (IASI) using statistical analysis and data from the World Data Centre for Greenhouse Gases (WDCGG). We use the correlation coefficient (r), relative difference (RD), root mean square errors (RMSE), and mean bias error (MBE) as evaluation indicators for this study. Statistical results show that a linear positive correlation between AIRS/IASI and WDCGG data occurs for most regions around the world. Temporal and spatial variations of these statistical quantities reflect obvious differences between satellite-derived and ground-based data based on geographic position, especially for stations near areas of intense human activities in the Northern Hemisphere. It is noteworthy that there appears to be a very weak correlation between AIRS/IASI data and ten groundbased observation stations in Europe, Asia, and North America. These results indicate that retrieval products from the two satellite-based instruments studied should be used with great caution.