刘松楠,汪君,王会军. 2022. 高分辨率卫星对“7·20”河南特大暴雨监测能力分析[J]. 气象学报, (0):-, doi:[doi]
高分辨率卫星对“7·20”河南特大暴雨监测能力分析
Analysis of the ability of high-resolution satellites to monitor the
投稿时间:2022-01-04  修订日期:2022-05-16
DOI:
中文关键词:  河南暴雨,CMORPH,FY,GPM,PERSIANN
英文关键词:Heavy rain, CMORPH, FY, GPM, PERSIANN
基金项目:国家自然科学基金(41991283和42175170)
作者单位邮编
刘松楠 南京信息工程大学 210044
汪君 中科院大气物理研究所 100029
王会军 南京信息工程大学 210044
摘要点击次数: 24
全文下载次数: 54
中文摘要:
      2021年7月20日河南中北部突降暴雨,造成至少302人遇难,这类极端降水事件会对社会经济发展和人类生产生活造成较大的影响,因此,准确监测这类暴雨事件至关重要。本文采用定性和定量方法综合评定了主流的10种高分辨率卫星降水产品(CMORPH-Raw、CMORPH-RT、PERSIANN-CCS、GPM IMERG-Early、GPM IMERG-Late、GSMaP-Now、GSMaP-NRT、FY-2F、FY-2G和FY-2H)在本次极端暴雨事件中的适用性,并分析了这10种产品对不同级别降水的监测能力。结果表明,这10种卫星降水产品均可以较为准确地展现出暴雨中心位于河南中北部的空间分布特征,但是所有卫星降水产品均较大程度低估了暴雨中心降水量值。随着降水等级的升高,各类卫星降水产品的命中率下降,TS评分降低,误报率升高。CMORPH-RT 对于暴雨量的捕捉能力强于CMORPH-Raw,且对暴雨过程的捕捉能力也更强;GPM IMERG-Late的准确度较GPM IMERG-Early有较大提高;相比于GSMaP-Now降水产品,GSMaP-NRT的准确度较高;PERSIANN-CCS和FY-2F的效果较差不能捕捉此次极端暴雨事件。对本次事件而言,CMORPH-RT的效果最好可以准确捕捉暴雨中心而且量值也与观测最为接近;融合红外和被动微波信息的卫星降水效果优于仅使用红外信息的降水产品,而且卫星反演算法和融合被动微波数据的多少对卫星降水的准确度有较大影响。
英文摘要:
      On July 20, 2021, a sudden rainstorm happened in central and northern Henan province, China, killed at least 302 people. Such extreme precipitation events have a great impact on social and economic development, and human lives. Therefore, accurate monitoring of such rainstorm events is crucial. Qualitative and quantitative methods were used to comprehensively evaluate 10 high-resolution satellite precipitation products (CMORPH-Raw, CMORPH-RT, PERSIANN-CCS, GPM IMERG-Early, GPM IMERG-Late, GSMaP-Now, GSMaP-NRT, FY-2F, FY-2G and FY-2H) applicability during this extreme rainstorm event, and the ability of these 10 products to monitor different levels of precipitation are also analyzed. The results showed that these 10 satellite precipitation products could capture the spatial distribution characteristics of the rainstorm pattern that locates in central and northern Henan, but all satellite precipitation products underestimated the precipitation value of the rainstorm center. As the precipitation level increased, the hit rate decreased, the TS score decreased, and the false alarm rate increased. CMORPH-RT had stronger ability to capture rainstorm than CMORPH-Raw and had the ability to capture rainstorm process; GPM IMERG-Late was more accurate than GPM IMERG-Early; compared to GSMAP-Now, the performance of GSMAP-NRT enhanced; PERSIANN-CCS and FY-2F had poor performance and cannot capture this extreme rainstorm event. Among them, CMORPH-RT had the best performance, which could accurately capture the center and magnitude of the rainstorm, and it was also the closest to observation. In general, the satellites precipitation that integrate infrared and passive microwave information is better than the products that only use infrared information. The satellite precipitation retrieval algorithm and the amount of passive microwave data have a greater impact on the accuracy of satellite precipitation.
查看全文   查看/发表评论  下载PDF阅读器
分享按钮