[gradsusr] GCM Output Question

[Tummuri, Spandana]

Hello All,


I am working on a study for a client.  As part of this study, I need to download GCM data for several GCM models (from AR4) and calculate 30-year averages for precipitation and temperature for historic period (1970-2000) and future period (2035-2065).  I am using emission scenario SRES A1B for my analysis.  I am using GraDs and monmask commands to calculate the long-term averages.  The client wanted me to superimpose actual meteorologic averages collected for the historic period over the model results for the same historic period.  When I did that, we noticed that GCMs are severely under predicting both precipitation values and temperature values.  I explained to the client why and how we should not compare GCM output with real-time observations for a local region because the scale of GCM results does not compare well with meteorologic records collected at a local scale.  However, they are still not convinced that GCM models would under predict the results so much.  They wanted me to contact a specialist that deals with GCM models.


I am not sure how I should address the client's concern.  I know that a lot of members of this community are experts in GCM models.  Can someone help me with this question?  You can send an email directly to my email address at tummuris(at)cdm.com.  I appreciate any help.


Thank you very much for you time.


Spandana Tummuri, Ph.D., P.E. | Water Resources Engineer | CDM
110 Fieldcrest Avenue, 6th Floor, Edison, NJ - 08837
T/F: 732.590.4617 | mobile: 214.918.1583
tummuris at cdm.com<mailto:tummuris at cdm.com>


-------------- next part --------------
An HTML attachment was scrubbed...
URL: http://gradsusr.org/pipermail/gradsusr/attachments/20110914/83414a52/attachment-0003.html