Guest Post By Yongkang Xue On Type 4 Regional Downscaling

In response to the article

Pielke Sr., R.A., and R.L. Wilby, 2012: Regional climate downscaling – what’s the point? Eos Forum,  93, No. 5, 52-53, doi:10.1029/2012EO050008.

Professor Yongkang Xue  sent me the e-mail below which I have reproduced with his permission. Yongkang is an internationally well-respected climate scientist. His is Professor in the Department of Geography  and the Department of Atmospheric and Oceanic Sciences at University of California at Los Angeles.

Date: Tue, 03 Apr 2012 08:44:27 -0700 From: Yongkang Xue To: Roger A Pielke Sr  Subject: Re: EOS article

Dear Roger,

You have raised a very important issue.   Because the regional downscaling becomes an important subject (mostly due to societal planning pressure), a lot of funds has been spent on this.   People without adequate training in the field rush to this field.  They just run the models then announce the results without appropriate scientific understanding.  In my opinion, the type 4 downscaling is a scientific issue, it certainly needs scientific research.  But taking it as a solved problem (push the computer bottom then announce the results) really will eventually hurt the society and science.

Thanks for taking the lead on this.

Yongkang

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