Representation of precipitation and top-of-atmosphere radiation in a multi-model convection-permitting ensemble for the Lake Victoria Basin (East-Africa)
Representation of precipitation and top-of-atmosphere radiation in a multi-model convection-permitting ensemble for the Lake Victoria Basin (East-Africa)
复制标题
维多利亚湖盆地(东非)多模型对流允许系综中降水和大气层顶部辐射的表示
DOI:
10.1007/s00382-022-06541-5
复制
发表时间:
2022
期刊:
影响因子:
4.6
通讯作者:
Lipzig N
中科院分区:
文献类型:
--
作者:
Lipzig N
The CORDEX Flagship Pilot Study ELVIC (climate Extremes in the Lake VICtoria basin) was recently established to investigate how extreme weather events will evolve in this region of the world and to provide improved information for the climate impact community. Here we assess the added value of the convection-permitting scale simulations on the representation of moist convective systems over and around Lake Victoria. With this aim, 10 year present-day model simulations were carried out with five regional climate models at both PARameterized (PAR) scales (12–25 km) and Convection-Permitting (CP) scales (2.5–4.5 km), with COSMO-CLM, RegCM, AROME, WRF and UKMO. Most substantial systematic improvements were found in metrics related to deep convection. For example, the timing of the daily maximum in precipitation is systematically delayed in CP compared to PAR models, thereby improving the agreement with observations. The large overestimation in the total number of rainy events is alleviated in the CP models. Systematic improvements were found in the diurnal cycle in Top-Of-Atmosphere (TOA) radiation and in some metrics for precipitation intensity. No unanimous improvement nor deterioration was found in the representation of the spatial distribution of total rainfall and the seasonal cycle when going to the CP scale. Furthermore, some substantial biases in TOA upward radiative fluxes remain. Generally our analysis indicates that the representation of the convective systems is strongly improved in CP compared to PAR models, giving confidence that the models are valuable tools for studying how extreme precipitation events may evolve in the future in the Lake Victoria basin and its surroundings.
登录
查看更多内容
影响因子:
2.2
作者:
W. Kranenburg;M. Tiessen;J. Veenstra;Reimer de Graaff;R. Uittenbogaard;D. Bouffard;Gaetan Sakindi;Augusta Umutoni;Jonas Van de Walle;W. Thiery;N. V. van Lipzig
通讯作者:
N. V. van Lipzig
DOI:
--
发表时间:
2015
期刊:
影响因子:
--
作者:
David Lindstedt;P. Lind;E. Kjellström;Colin G. Jones
通讯作者:
Colin G. Jones
影响因子:
1.9
作者:
Caroline M. Wainwright;D. Finney;M. Kilavi;E. Black;J. Marsham
通讯作者:
Caroline M. Wainwright;D. Finney;M. Kilavi;E. Black;J. Marsham
DOI:
--
发表时间:
2008
期刊:
影响因子:
--
作者:
B. Catry;J. Geleyn;F. Bouyssel;J. Cedilnik;R. Brožková;M. Derková;R. Mládek
通讯作者:
R. Mládek
DOI:
--
发表时间:
2000
期刊:
影响因子:
--
作者:
J. Cuxart;P. Bougeault;J. Redelsperger
通讯作者:
J. Redelsperger