青藏高原羌塘内流区降水时空特征
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TV122

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国家自然科学基金(91547101);江苏省自然科学基金(BK20161502)


Analysis of spatio-temporal characteristics of precipitation in Qiangtang inner flow area of Qinghai-Tibetan Plateau
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    摘要:

    利用8套卫星反演与模式模拟的降水资料及地面实测降水数据,分析了羌塘内流区2001—2015年的降水时空分布特征,评估了卫星反演与模式模拟降水资料在羌塘内流区的适用性。结果表明:GSMaP_Gauge降水资料在羌塘内流区表现出更好的适用性,其月数据与地面实测降水数据的相关系数达到0.95,相对误差、平均绝对误差和均方根误差最低;羌塘内流区降水空间格局整体上呈现自东南向西北、由南向北逐渐减少的分布规律;2001—2015年,内流区年降水量总体呈现增加趋势,GSMaP_Gauge年降水量更接近于内流区真实情况;年降水主要集中在夏季,占全年降水的59%以上。

    Abstract:

    Using eight sets of precipitation data from satellite inversion and model simulation and ground measured precipitation data, the spatio-temporal characteristics of precipitation in Qiangtang inner flow area from 2001 to 2015 were analyzed, and the applicability of precipitation data from satellite inversion and model simulation in Qiangtang inner flow area was evaluated. The results show that the GSMaP_Gauge precipitation data show better applicability in Qiangtang inner flow area. The correlation coefficient between the monthly data of GSMaP_Gauge and the ground measured precipitation data is 0. 95, and the relative error, average absolute error and root mean square error are the lowest. The spatial pattern of precipitation in the Qiangtang inner flow area shows a basic distribution pattern of decreasing from southeast to northwest and from south to north. From 2001 to 2015, the annual precipitation in the inner flow area shows an increasing trend, and the annual precipitation of GSMaP_Gauge is closer to the real situation. Annual precipitation is mainly concentrated in summer, accounting for more than 59% of the annual precipitation.

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王珂,王娜,雍斌.青藏高原羌塘内流区降水时空特征[J].水资源保护,2019,35(3):25-32.(WANG Ke, WANG Na, YONG Bin. Analysis of spatio-temporal characteristics of precipitation in Qiangtang inner flow area of Qinghai-Tibetan Plateau[J]. Water Resources Protection,2019,35(3):25-32.(in Chinese))

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  • 收稿日期:2018-10-15
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  • 在线发布日期: 2019-05-14
  • 出版日期: 2019-05-20