On the application of rainfall projections from a convection-permitting climate model to lumped catchment models
On the application of rainfall projections from a convection-permitting climate model to lumped catchment models
复制标题
关于降雨预测从允许对流气候模型到集中流域模型的应用
DOI:
10.1016/j.jhydrol.2023.129097
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发表时间:
2023
影响因子:
6.4
通讯作者:
Ascott M
中科院分区:
文献类型:
--
作者:
Ascott M
Climate change is predicted to increase rainfall intensity in tropical regions. Convection permitting (CP) climate models have been developed to address deficiencies in conventional climate models that use parameterised convection. However, to date, precipitation projections from CP climate models have not been used in conjunction with hydrological models to explore potential impacts of explicit modelling of convective rainfall on river flows in the tropics. Here we apply the outputs of a continental scale CP climate model as inputs to lumped rainfall-runoff models in Africa for the first time. Applied to five catchments in the Lake Victoria Basin, we show that the CP climate model produces greater river flows than an equivalent model using parameterised convection in both the current and future (c. 2100) climate. However, the location of the catchments near to Lake Victoria results in limited changes in extreme rainfall and river flows relative to changes in mean rainfall and river flows. Application of CP model rainfall data from an area where rainfall extremes change more than the change in mean rainfall to the rainfall-runoff model does not result in significant changes in river flows. Instead, this is shown to be a result of the rainfall-runoff model structure and parameterisation, which we posit is due to large-scale storage in the catchments associated with wetland cover, that buffers the impact of rainfall extremes. Based on an assessment of hydrological attributes (wetland coverage, water table depth, topography, precipitation, evapotranspiration and river flow) using global-scale datasets for the catchments in this research, this buffering may be extensive across humid regions. Application of CP climate model data to lumped catchment models in these areas are unlikely to result in significant increases in extreme river flows relative to increases in mean flows.
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影响因子:
8
作者:
N. Schaller;J. Sillmann;Malte Müller;R. Haarsma;W. Hazeleger;Trine Jahr Hegdahl;T. Kelder;G. V. D. van den Oord;A. Weerts;K. Whan
通讯作者:
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影响因子:
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Caroline M. Wainwright;J. Marsham;D. Rowell;D. Finney;E. Black
DOI:
--
发表时间:
2020
期刊:
影响因子:
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作者:
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通讯作者:
C. Houndénou
DOI:
--
发表时间:
2015
期刊:
影响因子:
--
作者:
Suinyuy Derrick Ngoran;Kingsley E. Dogah;X. Xue
通讯作者:
X. Xue
影响因子:
6.7
作者:
Klein C
通讯作者:
Klein C