Variability and trends in global drought

Earth and Space Science
By:  and 

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Abstract

Monthly precipitation (P) and potential evapotranspiration (PET) from the CRUTS3.1 data set are used to compute monthly P minus PET (PMPE) for the land areas of the globe. The percent of the global land area with annual sums of PMPE less than zero are used as an index of global drought (%drought) for 1901 through 2009. Results indicate that for the past century %drought has not changed, even though global PET and temperature (T) have increased. Although annual global PET and T have increased, annual global P also has increased and has mitigated the effects of increased PET on %drought.

Additional publication details

Publication type Article
Publication Subtype Journal Article
Title Variability and trends in global drought
Series title Earth and Space Science
DOI 10.1002/2015EA000100
Volume 2
Issue 6
Year Published 2015
Language English
Publisher AGU
Contributing office(s) National Research Program - Central Branch
Description 6 p.
First page 223
Last page 228