Linking global circulation model synoptics and precipitation for western North America

被引:20
作者
Lapp, S [1 ]
Byrne, J [1 ]
Kienzle, S [1 ]
Townshend, I [1 ]
机构
[1] Univ Lethbridge, Lethbridge, AB T1K 3M4, Canada
关键词
North America; synoptic classifications; downscaling; GCM; precipitation scenarios; climate change; winter precipitation;
D O I
10.1002/joc.851
中图分类号
P4 [大气科学(气象学)];
学科分类号
0706 ; 070601 ;
摘要
Synoptic downscaling from global circulation models (GCMs) has been widely used to develop local and regional-scale future precipitation scenarios under global warming. This paper presents an analysis of the linkages between the Canadian Centre for Climate Modelling and Analysis first version of the Canadian Global Coupled Model (CCCma CGCM1) 2000 model output and local/regional precipitation time series. The GCM 500 hPa geopotential heights were visually classified for Synoptic patterns using a geographical information system. The pattern frequencies were statistically compared with historical data from Chan-non et al. (1993. Monthly, Weather Review 121: 633-647) for the winter period 1961-85, The CGCM1 synoptic frequencies compare favourably with the historical data. and they represent a Substantial improvement over the 1992 Canadian Climate Centre Global Circulation Model Synoptic climatology Output. The CGCM1 output was used to forecast future winter precipitation scenarios for five geographically diverse climate stations in western North America. Copyright (C) 2002 Royal Meteorological Society.
引用
收藏
页码:1807 / 1817
页数:11
相关论文
共 46 条
[1]  
[Anonymous], 1996, Intergovernmental Panel on Climate Change
[2]  
Blair D, 1998, INT J CLIMATOL, V18, P1625, DOI 10.1002/(SICI)1097-0088(19981130)18:14<1625::AID-JOC330>3.0.CO
[3]  
2-B
[4]   A transient climate change simulation with greenhouse gas and aerosol forcing: experimental design and comparison with the instrumental record for the twentieth century [J].
Boer, GJ ;
Flato, G ;
Reader, MC ;
Ramsden, D .
CLIMATE DYNAMICS, 2000, 16 (06) :405-425
[5]   Linking observed and general circulation model upper air circulation patterns to current and future snow runoff for the Rocky Mountains [J].
Byrne, JM ;
Berg, A ;
Townshend, I .
WATER RESOURCES RESEARCH, 1999, 35 (12) :3793-3802
[6]  
Cavazos T, 1997, INT J CLIMATOL, V17, P1069, DOI 10.1002/(SICI)1097-0088(199708)17:10<1069::AID-JOC183>3.0.CO
[7]  
2-I
[8]  
*CCCMA, 2000, CAN CTR CLIM MOD AN
[9]  
CHANGNON D, 1993, MON WEATHER REV, V121, P633, DOI 10.1175/1520-0493(1993)121<0633:ASPATR>2.0.CO
[10]  
2