DOI: 10.5194/hess-21-267-2017
Scopus记录号: 2-s2.0-85009284439
论文题名: Improving the precipitation accumulation analysis using lightning measurements and different integration periods
作者: Gregow E ; , Pessi A ; , Mäkelä A ; , Saltikoff E
刊名: Hydrology and Earth System Sciences
ISSN: 10275606
出版年: 2017
卷: 21, 期: 1 起始页码: 267
结束页码: 279
语种: 英语
Scopus关键词: Gages
; Integration
; Lightning
; Radar
; Correction method
; Gauge measurements
; Intense precipitation
; Lightning observations
; Local analysis and prediction systems
; Real time analysis
; Statistical calculations
; Statistical relationship
; Radar measurement
; data acquisition
; data assimilation
; integrated approach
; numerical method
; precipitation assessment
; radar
; statistical analysis
英文摘要: The focus of this article is to improve the precipitation accumulation analysis, with special focus on the intense precipitation events. Two main objectives are addressed: (i) the assimilation of lightning observations together with radar and gauge measurements, and (ii) the analysis of the impact of different integration periods in the radar-gauge correction method. The article is a continuation of previous work by Gregow et al. (2013) in the same research field. A new lightning data assimilation method has been implemented and validated within the Finnish Meteorological Institute-Local Analysis and Prediction System. Lightning data do improve the analysis when no radars are available, and even with radar data, lightning data have a positive impact on the results. The radar-gauge assimilation method is highly dependent on statistical relationships between radar and gauges, when performing the correction to the precipitation accumulation field. Here, we investigate the usage of different time integration intervals: 1, 6, 12, 24 h and 7 days. This will change the amount of data used and affect the statistical calculation of the radar-gauge relations. Verification shows that the real-time analysis using the 1 h integration time length gives the best results. © 2017 The Author(s). Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/79297
Appears in Collections: 气候变化事实与影响
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作者单位: Meteorological Research, Finnish Meteorological Institute, P.O. Box 503, Helsinki, Finland; Applied Meteorology, Vaisala, 3 Lan Dr., Westford, MA, United States
Recommended Citation:
Gregow E,, Pessi A,, Mäkelä A,et al. Improving the precipitation accumulation analysis using lightning measurements and different integration periods[J]. Hydrology and Earth System Sciences,2017-01-01,21(1)