Pacific Northwest Hydrologic and Climate Change Scenarios for the 21st Century: A Brief Introduction to New Products and Overview of Downscaling Approaches Answers to questions posted during the 3.24.10 webinar
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Reply: For physical models, like global and regional climate models, the grid spacing used for the simulation can affect the total precipitation volume over a region. This results mainly from terrain effects. With finer grid spacing, the mountain ranges are better resolved, which produces more intense precipitation over the domain. This is a reason why regional models, especially those run at relatively course resolution, require some bias correction before they can be used for impacts studies.
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