Climate and climate change in western Canada as simulated by the Canadian regional climate model

被引:105
作者
Laprise, R
Caya, D
Giguere, M
Bergeron, G
Boer, GJ
McFarlane, NA
机构
[1] Univ Quebec, Dept Sci Terre, Stn Downtown, Montreal, PQ H3C 3P8, Canada
[2] Cooperat Ctr Mesoscale Meteorol, CCRM, Montreal, PQ, Canada
[3] Canadian Ctr Climate Modelling & Anal, Victoria, BC, Canada
[4] Univ Victoria, Victoria, BC, Canada
基金
加拿大自然科学与工程研究理事会;
关键词
D O I
10.1080/07055900.1998.9649609
中图分类号
P4 [大气科学(气象学)];
学科分类号
0706 ; 070601 ;
摘要
A first climate simulation performed with the novel Canadian Regional Climate Model (CRCM) is presented The CRCM is based on fully elastic non-hydrostatic field equations, which are solved with an efficient semi-implicit semi-Lagrangian (SISL) marching algorithm, and on the parametrization package of subgrid-scale physical effects of the second-generation Canadian Global Climate Model (GCMII). Two 5-year integrations of the CRCM nested with GCMII simulated data as lateral boundary conditions are made for conditions corresponding to current and doubled CO2 scenarios. For these simulations the CRCM used a grid size of 45 inn on a polar-stereographic projection, 20 scaled-height levels and a time step of 15 min; the nesting GCMII has a spectral truncation of T32, IO hybrid-pressure levels and a time step of 20 min. These simulations serve to document: (1) the suitability of the SISL numerical scheme for regional climate modelling, (2) the use of GCMII physics at much higher resolution than in the nesting model, (3) the ability of the CRCM to add realistic regional-scale climate information to global model simulations, and (4) the climate of the CRCM compared to that of GCMII under two greenhouse gases (GHG) scenarios.
引用
收藏
页码:119 / 167
页数:49
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