Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1029/2019WR025517 |
Adjustment of Radar-Gauge Rainfall Discrepancy Due to Raindrop Drift and Evaporation Using the Weather Research and Forecasting Model and Dual-Polarization Radar | |
Dai, Qiang1,2,3; Yang, Qiqi1,2; Han, Dawei2; Rico-Ramirez, Miguel A.2; Zhang, Shuliang1 | |
2019-11-16 | |
发表期刊 | WATER RESOURCES RESEARCH |
ISSN | 0043-1397 |
EISSN | 1944-7973 |
出版年 | 2019 |
文章类型 | Article;Early Access |
语种 | 英语 |
国家 | Peoples R China; England |
英文摘要 | Radar-gauge rainfall discrepancies are considered to originate from radar rainfall measurements while ignoring the fact that radar observes rain aloft while a rain gauge measures rainfall on the ground. Observations of raindrops observed aloft by weather radars consider that raindrops fall vertically to the ground without changing in size. This premise obviously does not stand because raindrop location changes due to wind drift and raindrop size changes due to evaporation. However, both effects are usually ignored. This study proposes a fully formulated scheme to numerically simulate both raindrop drift and evaporation in the air and reduces the uncertainties of radar rainfall estimation. The Weather Research and Forecasting model is used to simulate high-resolution three-dimensional atmospheric fields. A dual-polarization radar retrieves the raindrop size distribution for each radar pixel. Three schemes are designed and implemented using the Hameldon Hill radar in Lancashire, England. The first considers only raindrop drift, the second considers only evaporation, and the last considers both aspects. Results show that wind advection can cause a large drift for small raindrops. Considerable loss of rainfall is observed due to raindrop evaporation. Overall, the three schemes improve the radar-gauge correlation by 3.2%, 2.9%, and 3.8% and reduce their discrepancy by 17.9%, 8.6%, and 21.7%, respectively, over eight selected events. This study contributes to the improvement of quantitative precipitation estimation from radar polarimetry and allows a better understanding of precipitation processes. |
英文关键词 | radar rainfall wind drift dual-polarization radar radar-gauge rainfall discrepancies WRF |
领域 | 资源环境 |
收录类别 | SCI-E |
WOS记录号 | WOS:000496650300001 |
WOS关键词 | SIZE DISTRIBUTION RETRIEVAL ; POLARIMETRIC RADAR ; PRECIPITATION ESTIMATION ; WIND-DRIFT ; X-BAND ; QUANTITATIVE PRECIPITATION ; ENSEMBLE GENERATOR ; CONVECTIVE CLOUDS ; DRIVEN ; REFLECTIVITY |
WOS类目 | Environmental Sciences ; Limnology ; Water Resources |
WOS研究方向 | Environmental Sciences & Ecology ; Marine & Freshwater Biology ; Water Resources |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/223898 |
专题 | 资源环境科学 |
作者单位 | 1.Nanjing Normal Univ, Key Lab VGE, Minist Educ, Nanjing, Jiangsu, Peoples R China; 2.Univ Bristol, Dept Civil Engn, Bristol, Avon, England; 3.Jiangsu Ctr Collaborat Innovat Geog Informat Reso, Nanjing, Jiangsu, Peoples R China |
推荐引用方式 GB/T 7714 | Dai, Qiang,Yang, Qiqi,Han, Dawei,et al. Adjustment of Radar-Gauge Rainfall Discrepancy Due to Raindrop Drift and Evaporation Using the Weather Research and Forecasting Model and Dual-Polarization Radar[J]. WATER RESOURCES RESEARCH,2019. |
APA | Dai, Qiang,Yang, Qiqi,Han, Dawei,Rico-Ramirez, Miguel A.,&Zhang, Shuliang.(2019).Adjustment of Radar-Gauge Rainfall Discrepancy Due to Raindrop Drift and Evaporation Using the Weather Research and Forecasting Model and Dual-Polarization Radar.WATER RESOURCES RESEARCH. |
MLA | Dai, Qiang,et al."Adjustment of Radar-Gauge Rainfall Discrepancy Due to Raindrop Drift and Evaporation Using the Weather Research and Forecasting Model and Dual-Polarization Radar".WATER RESOURCES RESEARCH (2019). |
条目包含的文件 | 条目无相关文件。 |
除非特别说明,本系统中所有内容都受版权保护,并保留所有权利。
修改评论