Precipitation scaling with temperature in warm and cold climates: An analysis of CMIP5 simulations

Guangqi Li*, Sandy P. Harrison, Patrick J. Bartlein, Kenji Izumi, I. Colin Prentice

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

35 Citations (Scopus)

Abstract

We investigate the scaling between precipitation and temperature changes in warm and cold climates using six models that have simulated the response to both increased CO2 and Last Glacial Maximum (LGM) boundary conditions. Globally, precipitation increases in warm climates and decreases in cold climates by between 1.5%/°C and 3%/°C. Precipitation sensitivity to temperature changes is lower over the land than over the ocean and lower over the tropical land than over the extratropical land, reflecting the constraint of water availability. The wet tropics get wetter in warm climates and drier in cold climates, but the changes in dry areas differ among models. Seasonal changes of tropical precipitation in a warmer world also reflect this "rich get richer" syndrome. Precipitation seasonality is decreased in the cold-climate state. The simulated changes in precipitation per degree temperature change are comparable to the observed changes in both the historical period and the LGM.

Original languageEnglish
Pages (from-to)4018-4024
Number of pages7
JournalGeophysical Research Letters
Volume40
Issue number15
DOIs
Publication statusPublished - 16 Aug 2013

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