Science Source

Global warming and changes in drought

Assesses issues with the the formulation of the Palmer Drought Severity Index (PDSI) and the data sets used to determine the evapotranspiration component
States that changes in the global water cycle in response to the warming will not be uniform
States the contrast in precipitation between wet and dry regions and between wet and dry seasons will probably increase, although there may be regional exceptions
States climate change may not manufacture droughts, but it could exacerbate them and it will probably expand their domain in the subtropical dry zone