Scopus记录号: 2-s2.0-85043397748
论文题名: Climate downscaling over South America for 1971–2000: application in SMAP rainfall-runoff model for Grande River Basin
作者: da Silva F.N.R. ; Alves J.L.D. ; Cataldi M.
刊名: Climate Dynamics
ISSN: 9307575
出版年: 2019
卷: 52, 期: 2019-01-02 起始页码: 681
结束页码: 696
语种: 英语
英文关键词: Bias correction
; Global climate model
; Hydrological model
; Hydrometeorological modeling
; RegCM
; Regional climate model
; SMAP
英文摘要: This paper aims to validate inflow simulations concerning the present-day climate at Água Vermelha Hydroelectric Plant (AVHP—located on the Grande River Basin) based on the Soil Moisture Accounting Procedure (SMAP) hydrological model. In order to provide rainfall data to the SMAP model, the RegCM regional climate model was also used working with boundary conditions from the MIROC model. Initially, present-day climate simulation performed by RegCM model was analyzed. It was found that, in terms of rainfall, the model was able to simulate the main patterns observed over South America. A bias correction technique was also used and it was essential to reduce mistakes related to rainfall simulation. Comparison between rainfall simulations from RegCM and MIROC showed improvements when the dynamical downscaling was performed. Then, SMAP, a rainfall-runoff hydrological model, was used to simulate inflows at Água Vermelha Hydroelectric Plant. After calibration with observed rainfall, SMAP simulations were evaluated in two different periods from the one used in calibration. During calibration, SMAP captures the inflow variability observed at AVHP. During validation periods, the hydrological model obtained better results and statistics with observed rainfall. However, in spite of some discrepancies, the use of simulated rainfall without bias correction captured the interannual flow variability. However, the use of bias removal in the simulated rainfall performed by RegCM brought significant improvements to the simulation of natural inflows performed by SMAP. Not only the curve of simulated inflow became more similar to the observed inflow, but also the statistics improved their values. Improvements were also noticed in the inflow simulation when the rainfall was provided by the regional climate model compared to the global model. In general, results obtained so far prove that there was an added value in rainfall when regional climate model was compared to global climate model and that data from regional models must be bias-corrected so as to improve their results. © 2018, Springer-Verlag GmbH Germany, part of Springer Nature. 资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/122466
Appears in Collections: 气候变化事实与影响
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作者单位: Coordenadoria de Meteorologia, Federal Center of Technological Education (CEFET/RJ), Av. Maracanã 229, Bloco A, Torre, Rio de Janeiro, RJ CEP: 20271-110, Brazil; Centro de Tecnologia, Federal University of Rio de Janeiro (UFRJ), Bloco I, Sala 214 Av. Athos da Silveira Ramos, 149 Cidade Universitária, Rio de Janeiro, RJ CEP: 21941-909, Brazil; Fluminense Federal University (UFF), Rua Passo da Pátria, 156 Bloco D Sala 236 São Domingos, Niterói, RJ CEP: 24210-240, Brazil
Recommended Citation:
da Silva F.N.R.,Alves J.L.D.,Cataldi M.. Climate downscaling over South America for 1971–2000: application in SMAP rainfall-runoff model for Grande River Basin[J]. Climate Dynamics,2019-01-01,52(2019-01-02)