AIRS反演青藏高原对流层大气甲烷分布特征

发布时间：2018-06-15 16:16

  本文选题：大气甲烷 + 时空分布特征　； 参考：《中国环境科学》2017年08期

【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.
[Abstract]:The methane concentration distribution in the troposphere over the Qinghai-Xizang Plateau from 2003 to 2015 is analyzed and compared with the methane concentration observed at the Waliguan atmospheric background station by using the results of the airs inversion and the observational data of methane concentration in the tropospheric atmosphere of the Tibetan Plateau from 2003 to 2015. The results show that the change trend and the segmental change characteristics of the inversion data are consistent with those of the Variguan observational data in terms of month, year, and quarter. The methane concentration in the Qinghai-Tibet Plateau is high in the southeast and low in the northwest along the eastern margin of the Qiangtang Plateau-the source of the three rivers. The change rate of methane concentration in the south-central part of the plateau is the largest and extremely sensitive. From 2003 to 2015, the methane concentration in Qinghai-Xizang Plateau continued to rise, the fastest in autumn and the slowest in winter. The annual growth rate was 5.2nmol / mol / L during the period of 20132015, which was smaller than the global growth rate, and the seasonal variation was typical single-peak distribution. The highest in summer and the lowest in spring, the seasonal variation is more obvious with the height rising.
【作者单位】： 中国科学院西北生态环境资源研究院;中国科学院大学;中国气象局综合观测司;
【基金】：国家自然科学基金项目(91437108) 中国科学院西北生态环境资源研究所青年基金项目(51Y651L01)
【分类号】：X51
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本文编号：2022646