[1]梁维亮,屈梅芳,何珊珊.两种雷达定量降水估测产品在广西区域的误差对比分析[J].气象研究与应用,2020,41(03):1-7.[doi:10.19849/j.cnki.CN45-1356/P.2020.3.01]
 Liang Weiliang,Qu Meifang,He Shanshan.Contrastive analysis on the error of two radar quantitative precipitation estimation products in Guangxi[J].Journal of Meteorological Research and Application,2020,41(03):1-7.[doi:10.19849/j.cnki.CN45-1356/P.2020.3.01]
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两种雷达定量降水估测产品在广西区域的误差对比分析()
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气象研究与应用[ISSN:1673-8411/CN:45-1356/P]

卷:
第41卷
期数:
2020年03期
页码:
1-7
栏目:
研究论文
出版日期:
2020-09-30

文章信息/Info

Title:
Contrastive analysis on the error of two radar quantitative precipitation estimation products in Guangxi
作者:
梁维亮 屈梅芳 何珊珊
广西壮族自治区气象台, 南宁 530022
Author(s):
Liang Weiliang Qu Meifang He Shanshan
Guangxi Meteorological Observatory, Nanning 530022
关键词:
固定系数QPE分级系数QPE广西区域误差对比分析
Keywords:
fixed coefficient QPEgraded coefficient QPEGuangxierrorcontrastive analysis
分类号:
P456
DOI:
10.19849/j.cnki.CN45-1356/P.2020.3.01
摘要:
利用2018-2019年广西多普勒天气雷达组网观测资料和广西区域地面自动站降水资料,运用SWAN系统中固定系数法和分级系数法,对比分析两种定量降水估测(QPE)产品的估测技巧、偏差趋势和误差分布。结果表明,在春季、夏季和秋季固定系数QPE晴雨TS高于分级系数QPE,在冬季反之。固定系数QPE对不同量级降水估测均偏小,一般偏小50%以上,对强降水偏小70%。分级系数QPE在春季和秋季偏大,在夏季偏小,偏离程度小于固定系数QPE。采用分级系数可以显著减少强降水漏报。
Abstract:
The estimation skill, deviation tendency and error distribution of fixed coefficient and graded coefficient radar quantitative precipitation estimation(QPE) products of SWAN were analyzed based on Doppler radar network observation and surface precipitation observation in Guangxi. The results show that technique score(TS) of fixed coefficient QPE is higher than graded coefficient QPE in spring, summer and autumn, but lower in winter. Fixed coefficient QPE is mostly underestimated by 50% as a whole, and by 70% to the severe rainfall. Graded coefficient QPE is mostly overestimated in spring and autumn, and underestimated in summer. But the deviation is smaller than fixed coefficient QPE. Graded coefficient QPE can effectively reduce the missing rate for severe rainfall forecasting.

参考文献/References:

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备注/Memo

备注/Memo:
收稿日期:2020-05-31。
基金项目:广西气象局气象科研计划项目(2020QN04)、广西气象局短时临近天气预报技术创新团队专项
作者简介:梁维亮(1983-),男,广西贵港人,硕士,高级工程师,从事灾害性天气预报业务和技术研发。E-mail:little_lwl@hotmail.com
更新日期/Last Update: 1900-01-01