A numerical method to generate high temporal resolution precipitation time series by combining weather radar measurements with a nowcast model

被引：36
作者：
Nielsen, Jesper E. [1 ]
Thorndahl, Soren [1 ]
Rasmussen, Michael R. [1 ]
机构：
[1] Aalborg Univ, Dept Civil Engn, DK-9000 Aalborg, Denmark
来源：
ATMOSPHERIC RESEARCH | 2014年 / 138卷
关键词：
Weather radar; Quantitative precipitation estimates; Temporal interpolation of radar data; Laser disdrometers; RAINFALL MEASUREMENTS; HYDROLOGY; BASINS;
D O I：
10.1016/j.atmosres.2013.10.015
中图分类号：
P4 [大气科学（气象学）];
学科分类号：
0706 ; 070601 ;
摘要：
The topic of this paper is temporal interpolation of precipitation observed by weather radars. Precipitation measurements with high spatial and temporal resolution are, in general, desired for urban drainage applications. An advection-based interpolation method is developed which uses methods for vector field estimation already known from short-term weather radar nowcasting. However, instead of forecasting the weather radar rainfall, the proposed interpolation method exploits the advection of the rainfall in the interpolation. The interpolated rainfall fields are validated by measurements at ground level from laser disdrometers. The proposed interpolation method performs better when compared to traditional interpolation of weather radar rainfall where the radar observation is considered constant in time between measurements. It is demonstrated that the advection-based interpolation method reconstructs a significant part of the temporal variations of the rainfall. Moreover, the interpolated precipitation fields estimate accumulated rain depths more accurately. (C) 2013 Elsevier B.V. All rights reserved.
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页码：1 / 12
页数：12
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