摘要
本文选取河南省15个具有代表性的气象站点,根据其1998—2019年的逐月气象观测资料和TRMM 3B43V7逐月卫星降水数据,运用多种统计指标评估TRMM 3B43V7卫星降水产品在河南省的适用性;采用卫星降水数据代替地面降水资料计算标准化帕尔默干旱指数(SPDI),并寻求最优时间尺度;结合历史干旱事件记载,评估SPDI指数在河南省干旱监测中的适用性。结果表明:TRMM3B43V7卫星降水数据与实测地面降水数据相比,精确度很高(Bias=-0.05)、相关性很强(CC>0.88);由TRMM卫星降水数据计算得到的SPDI指数用于评估河南省历史干旱表现良好,且12个月时间尺度的SPDI指数(SPDI12)适用性最好。鉴于以上结论,可以考虑基于TRMM卫星降水产品和SPDI12指数构建河南省的干旱监测业务化系统。
In this paper, 15 representative meteorological stations in Henan Province are selected, and according to their monthly meteorological observation data from 1998 to 2019 and monthly satellite precipitation data of TRMM 3B43V7, the applicability of TRMM 3B43V7 satellite precipitation products in Henan Province is evaluated by various statistical indicators. Using satellite precipitation data instead of ground precipitation data to calculate standardized Palmer drought index(SPDI), and seeking the optimal time scale;Based on the records of historical drought events, the applicability of SPDI index in drought monitoring in Henan Province was evaluated. The results show that the TRMM3 B43V7 satellite precipitation data has high accuracy(Bias=-0.05) and strong correlation(CC>0.88) compared with the measured ground precipitation data. The SPDI index calculated from TRMM satellite precipitation data is used to evaluate the historical drought performance in Henan Province, and the SPDI index(SPDI12) of 12 months time scale is the best. In view of the above conclusions, we can consider building an operational drought monitoring system in Henan Province based on TRMM satellite precipitation products and SPDI12 index.
作者
陈昊杰
马明卫
林远
CHEN Haojie;MA Mingwei;LIN Yuan(NCWU School of Water Resources,Zhengzhou 450046,China)
出处
《水资源开发与管理》
2022年第3期6-15,共10页
Water Resources Development and Management
基金
华北水利水电大学2020年大学生创新创业训练计划重点项目(2020XA061)
国家自然科学基金项目(41701022)。
关键词
标准化帕尔默干旱指数
干旱监测评估
卫星降水产品
河南省
standardized palmer drought index
drought monitoring and evaluation
satellite precipitation products
Henan Province
