DOI: 10.1016/j.atmosres.2018.08.028
Scopus记录号: 2-s2.0-85053195895
论文题名: Performance of satellite-based and GPCC 7.0 rainfall products in an extremely data-scarce country in the Nile Basin
作者: Basheer M. ; Elagib N.A.
刊名: Atmospheric Research
ISSN: 1698095
出版年: 2019
卷: 215 起始页码: 128
结束页码: 140
语种: 英语
英文关键词: Data scarcity
; Nile Basin: Africa
; Point-to-pixel
; Satellite-based rainfall
; South Sudan
Scopus关键词: Chirp modulation
; Climatology
; Clock and data recovery circuits (CDR circuits)
; Developing countries
; Neural networks
; Pixels
; Rain gages
; Satellites
; Soil moisture
; Data scarcity
; Global precipitation
; Hydrological process
; Nile basins
; Precipitation estimation from remotely sensed information
; Rainfall climatologies
; Rainfall estimations
; South Sudan
; Rain
; data processing
; pixel
; precipitation assessment
; raingauge
; satellite data
; temporal variation
; Nile Basin
; South Sudan
英文摘要: The rain gage networks in the African countries are notorious for their poor density and low frequency of observations. Rainfall products based on satellite estimates and/or ground observations have proven to be a viable alternative in the recent evolving campaigns to overcome this deficiency. The newly-borne country within the Nile Basin, South Sudan, has extremely few operating rain gage stations. Herein, evaluation of six long-term (1983 onward) rainfall products, i.e. the Global Precipitation Climatology Centre full data reanalysis version 7.0 (GPCC 7.0) and five Satellite-Rainfall Products (SRPs), is undertaken. Data from the only currently operating long-term stations (five) with reasonably up-to-date records are used to conduct point-to-pixel evaluation for the six products (from 1983 to 2010). The results of error and linear fit metrics rank GPCC 7.0 as the best performing product on monthly, maximum monthly, and annual scales, followed by Climate Hazards group Infrared Precipitation with Stations version 2.0 (CHIRPS v2.0). As regards the variability of annual rainfall, GPCC 7.0 outperforms the products whereas the Precipitation Estimation from Remotely Sensed Information Using Artificial Neural Networks–Climate Data Record (PERSIANN-CDR) and CHIRPS v2.0 have the second-best performance. GPCC 7.0 and the Multi-Source Weighted-Ensemble Precipitation version 2.0 (MSWEP 2.0) show better agreement of variability of monthly rainfall with that of the station rainfall. The Africa Rainfall Climatology version 2.0 (ARC2) performs the best in capturing the variability in the maximum monthly rainfall followed by GPCC 7.0. In relation to capturing the median rainfall, a complex performance is evident across the stations with the following remarks: relatively good performance from MSWEP 2.0 on the annual scale followed by PERSIANN-CDR; GPCC 7.0 (PERSIANN-CDR) is mostly (relatively) operational for the median maximum monthly rainfall; GPCC 7.0 (CHIRSPS v2.0) is mostly (partly) suitable as an estimator for the monthly median. All the present SRPs unequivocally under-estimate the monthly peaks. Enhancing the rainfall estimation and observation network is key to improving the understanding and modeling of the hydrological processes and phenomena occurring in the basin in general and in the floodplains of the country in particular. © 2018 Elsevier B.V. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/109055
Appears in Collections: 影响、适应和脆弱性 气候变化事实与影响
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作者单位: Institute for Technology and Resources Management in the Tropics and Sub-tropics (ITT), Technische Hochschule Köln, Betzdorferstr. 2, Cologne, 50679, Germany
Recommended Citation:
Basheer M.,Elagib N.A.. Performance of satellite-based and GPCC 7.0 rainfall products in an extremely data-scarce country in the Nile Basin[J]. Atmospheric Research,2019-01-01,215