Editorial: Past, recent, and future climate-change impacts on hydrologic and environmental variability in selected regions of Asia

This is an article in the special issue "Past, recent, and future climate-change impacts on hydrologic and environmental variability in selected regions of Asia" which was one outcome of a LIMPACS workshop (Focus 4) on past environmental variability and water resources in arid and semi-arid regions held from 11-14 April 2007 in Nanjing, China.