中文摘要：

利用AIRS反演结果与瓦里关大气本底站甲烷浓度观测资料进行了对比分析,并对2003~2015年青藏高原对流层大气甲烷浓度的分布变化特征进行研究分析.结果表明:AIRS反演资料与瓦里关观测资料具有一致的月、年、季度变化趋势和分段变化特征.青藏高原甲烷浓度沿羌塘高原东缘——三江源西北地区一线,东南高、西北低,随高度上升呈现显著降低趋势,高原中部偏南地区甲烷浓度变率最大且异常敏感.2003~2015年青藏高原甲烷浓度持续上升,秋季最快、冬季最慢,年增长速度为5.2nmol/(mol.a),2013~2015期间小于全球增速;季节变化为典型单峰分布,夏季最高,春季最低,随着高度上升季节变化更为明显.

英文摘要：

It was presented that a contrastive study on the AIRS retrieval results and the observational data of methane concentration at Waliguan atmospheric background station,and was analyzed that the distribution variation characteristics of atmospheric methane concentration over the Qinghai-Tibet Plateau from2003to2015.It was showed that the AIRS retrieval data displayed the same monthly,annual and seasonal variation trend,as well as segmental variation characteristics,with those of Waliguan station.The methane concentration was featured high in the southeast and low in the northwest along with the geographical line of the east edge of Qiangtang Plateau-the northwest region of Resource of Three rivers,and decreased significantly as the altitude rose,with the highest and the most sensitive variability in the south central region of the Qinghai-Tibet Plateau.From2003to2015,the methane concentration in the Qinghai-Tibet Plateau continued to rise,with the fastest growth in autumnand the slowest in winter,at an annual growth rate of5.2nmol/(mol·a),while the growth rate from2013to2015was lower than the global average.The seasonal variation showed a unimodal curve,with the highest value in summer and the lowest value in spring,and with the altitude rising,the seasonal variation was more significant.