干旱区研究

干旱区研究 ›› 2018, Vol. 35 ›› Issue (6): 1373-1381.doi: 10.13866/j.azr.2018.06.14

• 天气与气候 • 上一篇    下一篇

GPM和TRMM遥感降水产品在青藏高原中部的适用性评估

余坤伦1,2, 张寅生1,3, 马宁1, 郭燕红1   

  1. 1.中国科学院青藏高原研究所地表过程与环境变化重点实验室,北京 100101;
    2.中国科学院大学,北京 100101;
    3.中国科学院青藏高原卓越创新中心,北京 100101
  • 收稿日期:2018-01-10 修回日期:2018-03-23 出版日期:2018-11-15 发布日期:2025-11-18
  • 通讯作者: 张寅生. E-mail: yszhang@itpcas.ac.cn
  • 作者简介:余坤伦(1996- ),男,硕士研究生,主要从事遥感降水产品研究. E-mail: yukunlun17@mails.ucas.edu.cn
  • 基金资助:
    国家重点研发项目(2017YFA0603101);国家自然科学基金(41661144025,41430748);中国科学院国际合作局对外合作项目(131C11KYSB20150006)

Applicability of GPM and TRMM Remote Sensing Precipitation Products in the Central Tibet Plateau

YU Kun-lun1,2, ZHANG Yin-sheng1,3, MA Ning1, GUO Yan-hong1   

  1. 1. Key Laboratory of Tibetan Environmental Changes and Land Surface Processes, Institute of Tibetan Plateau Research, Chinese Academy of Sciences, Beijing 100101, China;
    2. University of Chinese Academy of Sciences, Beijing 100101, China;
    3. CAS Center for Excellence in Tibetan Plateau Earth Sciences, Chinese Academy of Sciences, Beijing 100101, China
  • Received:2018-01-10 Revised:2018-03-23 Published:2018-11-15 Online:2025-11-18

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摘要： 利用青藏高原色林错流域2014年4月到2015年3月期间5个地面观测站点的降水资料,对两种遥感降水——热带降水测量计划降水产品(Tropical Rainfall Measuring Mission, TRMM)和全球降水测量(Global Precipitation Measurement, GPM)——观测产品在高海拔、寒冷条件的适用性进行了评价。通过相关性评价指标、误差统计评价指标和分类统计评价指标等对比,发现:① 无论在日和年尺度上,相较于TRMM卫星降水产品而言,GPM卫星降水产品的精确度更高;TRMM产品明显过高估测了降水量;② 两种产品对强降水事件的探测性能都有较大缺陷,GPM产品对弱降水事件的探测能力明显优于TRMM产品;③ 随着统计时间尺度的增大,GPM降水产品的精度呈明显增加趋势。

关键词: 地面观测, 遥感降水产品, GPM, TRMM, 适用性评价, 青藏高原

Abstract: In this paper, the uncertainties of satellite precipitation products, both of Global Precipitation Measurement (GPM) and widely used precipitation product—Tropical Rainfall Measuring Mission (TRMM), were evaluated based on the data from five meteorological stations in the Silin Co Basin in the Tibetan Plateau during the period from April 2014 to March 2015. The accuracies of GPM and TRMM were studied using the correlation evaluation index (Person Correlation Coefficient R), Error statistical evaluation index (including the root mean square error RMSE and percent bias PB) and classification statistical evaluation index (BIAS, POD, FAR and HKS score). The results showed that: ① The accuracy of GPM was higher than that of TRMM at both daily and annual timescales, and the precipitation was significantly overestimated if the TRMM products were used; ② Although GPM performed better than TRMM in detecting weak precipitation events, there were some big flaws of both products in detecting the heavy precipitation events; ③ The accuracy of GPM was obviously increased with the increase of timescale.

Key words: ground observation, remote sensing precipitation product, GPM, TRMM, applicability evaluation, Tibetan Plateau