DOI: 10.1002/2016JD025683
论文题名: Evaluation of WRF capability to detect dry and wet periods in Spain using drought indices
作者: García-Valdecasas Ojeda M. ; Gámiz-Fortis S.R. ; Castro-Díez Y. ; Esteban-Parra M.J.
刊名: Journal of Geophysical Research: Atmospheres
ISSN: 2169897X
出版年: 2017
卷: 122, 期: 3 起始页码: 1569
结束页码: 1594
语种: 英语
英文关键词: drought
; regional climate models
; Spain
; SPEI
; SPI
; WRF
Scopus关键词: climate modeling
; computer simulation
; detection method
; downscaling
; drought
; dry season
; evapotranspiration
; precipitation (climatology)
; regional climate
; regionalization
; spatiotemporal analysis
; temperature
; weather forecasting
; wet season
; Spain
英文摘要: The Weather Research and Forecasting (WRF) model has been used to show the benefits provided by downscaled fields to detect and analyze wet and dry periods over a region with high precipitation variability such as Spain. We have analyzed the spatiotemporal behavior of two widely used drought indices: the Standardized Precipitation Index (SPI) and the Standardized Precipitation Evapotranspiration Index (SPEI), computed at 3 and 12 month time scales, which provide important information in an agricultural and water-resource context. These two indices were computed from WRF outputs and compared with those calculated from observational (monthly precipitation and temperature databases of Spain, MOPREDAS and MOTEDAS) and from the European Centre for Medium-Range Weather Forecasts Interim Re-Analysis (ERA-Interim) data sets. This evaluation was made by using a regional scale and a multistep regionalization method and by comparison of individual grid points. In general, results indicate that the drought indices obtained by using WRF outputs provide a noticeable improvement regarding those computed by using ERA-Interim, higher at longer time scales. Although results show no significant differences between drought indices analyzed, the improvement offered by WRF is greater for SPI than for SPEI. In terms of averaged duration, magnitude, and severity of drought, the benefits provided by WRF are not so evident, presenting better agreement with the observational data at 12 month time scale, being clearer for the intensity. These findings evidence the benefit of using WRF climate fields to monitor, analyze, and detect drought events, being a valuable source of knowledge for a suitable decision making, especially for water-resource management. ©2017. The Authors. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/62681
Appears in Collections: 影响、适应和脆弱性 气候减缓与适应
There are no files associated with this item.
作者单位: Departamento de Física Aplicada, Facultad de Ciencias, Universidad de Granada, Granada, Spain
Recommended Citation:
García-Valdecasas Ojeda M.,Gámiz-Fortis S.R.,Castro-Díez Y.,et al. Evaluation of WRF capability to detect dry and wet periods in Spain using drought indices[J]. Journal of Geophysical Research: Atmospheres,2017-01-01,122(3)