Spatial and temporal variations of lower tropospheric methane during 2010-2011 in China
文献类型：EI期刊论文
| 作者 | Xu Yong; Sun Jiulin; Wang Juanle |
| 发表日期 | 2012 |
| 关键词 | Troposphere Air Estimation Greenhouse gases Infrared devices Infrared instruments Methanation Methane Remote sensing |
| 英文摘要 | Estimates of methane (CH4) concentrations in the lower troposphere over the land surfaces of the world, and in more detail for China, were derived from data from the Atmospheric Infrared Sounder (AIRS). Derivation of CH4 estimates is described, and these were validated with reference to CH4 concentrations analyzed for air samples in three regions of China and the observations from three global baseline sites. The values of sample points and three global baseline sites were extracted from remotely sensed images. The correlation coefficients between remotely sensed geographical point estimates of CH4 and observations were equal to 0.779 and 0.763. Seasonal and monthly variation of CH4 concentrations for the 2010-2011 year and the spatial variation of these concentrations for the troposphere over China derived from remotely sensed data were mapped and interpreted with reference to possible sources of CH4 emission. Methane concentrations were about 15 ppb higher in winter than summer. The changes in concentrations were about 50 ppb in Inner Mongolian Plateau between September and October 2010, northwest China between February and March 2011. Variations of CH4 concentration are considered with reference to mixing of atmospheric gases by oceanic influences and to sources of CH 4 emissions including vegetation cover particularly wetland, crop, and pastoral land use. 2008-2012 IEEE. |
| 出处 | Ieee Journal of Selected Topics in Applied Earth Observations and Remote Sensing
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| 卷 | 5期:5页:1464-1473 |
| 收录类别 | EI |
| 语种 | 英语 |
| 源URL | [http://ir.igsnrr.ac.cn/handle/311030/31209]  |
| 专题 | 地理科学与资源研究所_历年回溯文献 |
| 推荐引用方式 GB/T 7714 | Xu Yong,Sun Jiulin,Wang Juanle. Spatial and temporal variations of lower tropospheric methane during 2010-2011 in China. 2012. |
入库方式： OAI收割
来源：地理科学与资源研究所
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