It is well known that GCM simulations of regional climate on sub continental scales are poor. It is probably better to look at region climate models driven by the forcings output by the GCMS. This is a technique which has been used, for example, by Kerry Emmanuel in his more recent work looking at hurricane activity (which caused him to back off on some earlier predictions based on GCMs).
I would try to find papers looking at the SW US using RCMs. This might provide a better look at what might happen. --John Date: Fri, 27 Aug 2010 12:52:27 -0700 Subject: [Global Change: 3810] About GCM simulations in Southwestern US From: [email protected] To: [email protected] Hi Everybody, I got some questions about GCM simulations in the southwestern US. I am not sure if I could ask these here. Maybe somebody had some experiences about this. I am working on a project about climate change impact in the southwestern US. My study area range 31°-34°N and 112° -108° W. For the GCM models, the longitude are 248° -252°E. I retrieved some GCM outputs of several GCM models (including HadCM3, ECHAM5, CCCma (T_63), GFDL_CM2.1, NCAR_PCM, NCAR_CCSM3) for this area from IPCC data center. I compared the simulations of 20C3M experiment to the historical data, and found that the GCM models simulated more precipitation in winter month than that in summer monsoon month. That's way too far from the observations. First, I thought maybe I retrieved the data from the wrong grid cell, and checked them out many times, it's still the same. So I just wonder whether anybody have the same experiences and could share some information with me. Thanks John -- You received this message because you are subscribed to the Google Groups Global Change ("globalchange") newsgroup. Global Change is a public, moderated venue for discussion of science, technology, economics and policy dimensions of global environmental change. Posts will be admitted to the list if and only if any moderator finds the submission to be constructive and/or interesting, on topic, and not gratuitously rude. To post to this group, send email to [email protected] To unsubscribe from this group, send email to [email protected] For more options, visit this group at http://groups.google.com/group/globalchange -- You received this message because you are subscribed to the Google Groups Global Change ("globalchange") newsgroup. Global Change is a public, moderated venue for discussion of science, technology, economics and policy dimensions of global environmental change. Posts will be admitted to the list if and only if any moderator finds the submission to be constructive and/or interesting, on topic, and not gratuitously rude. To post to this group, send email to [email protected] To unsubscribe from this group, send email to [email protected] For more options, visit this group at http://groups.google.com/group/globalchange
