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青藏高原积雪日数的气温敏感度分析
引用本文:马丽娟,秦大河,卞林根,效存德,罗勇.青藏高原积雪日数的气温敏感度分析[J].气候变化研究进展,2010,6(1):1-07.
作者姓名:马丽娟  秦大河  卞林根  效存德  罗勇
作者单位:1. 国家气候中心2. 中国气象局3. 中国气象科学研究院
基金项目:博士后科学基金面上项目,冰冻圈科学国家重点实验室开放基金 
摘    要:根据青藏高原气象台站观测积雪日数和均一化气温数据,对高原1951—2004年积雪日数对气温的敏感度进行了量化分析。研究表明,无论是极值敏感度还是当前气候下的敏感度,空间上都呈现出高原四周积雪较中部对气温的敏感程度高的情况。各台站积雪日数对气温最敏感时的临界气温与海拔有着极好的反相关关系,而极值敏感度与海拔虽然也有一定的反相关,但相关程度远不如前者高。在当前气候状态下,有相当一部分台站的平均气温还未达到临界值,这些台站在秋、冬、春、夏季分别占总台站数的36%、39%、47%和11%。未来气候继续变暖背景下,这部分台站积雪日数对气温的敏感度会进一步加大,即积雪对气温的升高会更加敏感。

关 键 词:积雪  青藏高原  气候变化  敏感度
收稿时间:2009-7-8
修稿时间:2009-8-13  

Analysis of Air Temperature Sensitivity of Snow Cover Days on the Qinghai-Tibetan Plateau
Ma Lijuan,Qin Dahe,Bian Lingen,Xiao Cunde,Luo Yong.Analysis of Air Temperature Sensitivity of Snow Cover Days on the Qinghai-Tibetan Plateau[J].Advances in Climate Change,2010,6(1):1-07.
Authors:Ma Lijuan  Qin Dahe  Bian Lingen  Xiao Cunde  Luo Yong
Affiliation:1. China Meteorological Administration2. Chinese Academy of Meteorological Sciences3. National Climate Center
Abstract:Based on the observed monthly snow cover days and homogenized air temperature data in 1951-2004, this study performs the quantitative analysis of the air temperature sensitivity of snow cover days on the Qinghai-Tibetan Plateau. Results show that both the extreme sensitivity and sensitivity under the current climate are higher in the edge than in the central area of the plateau. There exists a strong negative correlation between the critical air temperatures when the relative snow cover days reach the extrema and the elevation of the station. However, the relationship between the extreme sensitivity and the elevation is not as strong as the correlation between the critical air temperature and the elevation although they present certain negative relationship. Currently, the climatological air temperatures at quite a few of stations do not reach the critical situation, with a proportion to all stations of 36%, 39%, 47%, and 11% in autumn, winter, spring, and summer, respectively. Under the current background of climate warming, the sensitivity of snow cover days at these stations will become greater; that is, snow cover days there will be more sensitive to air temperature.
Keywords:snow cover  Qinghai-Tibetan Plateau  climate change  sensitivity
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