Methodological Approaches to Projecting the Hydrologic Impacts of Climate Change*

Earth Interactions

Brent M.Lofgren¹ 

关键词: Climate change;    Surface processes;    Water resources;    Evapotranspiration;   

DOI  :  10.1175/2013EI000532.1

学科分类：地球科学(综合)

来源: American Geophysical Union

【 摘 要 】

AbstractClimate change due to anthropogenic greenhouse gases (GHG) is expected to have important impacts on water resources, with a variety of societal impacts. Recent research has shown that applying different methodologies to assess hydrologic impacts can lead to widely diverging projections of water resources. The authors classify methods of projecting hydrologic impacts of climate change into those that estimate potential evapotranspiration (PET) based on air temperature and those that estimate PET based on components of the surface energy budget. In general, air temperature–based methods more frequently show reductions in measures of water resources (e.g., water yield or soil moisture) and greater sensitivity than those using energy budget–based methods. There are significant trade-offs between these two methods in terms of ease of use, input data required, applicability to specific locales, and adherence to fundamental physical constraints: namely, conservation of energy at the surface. Issues of un...

【 授权许可】

Unknown