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Related Experiment Videos

How much more rain will global warming bring?

Frank J Wentz1, Lucrezia Ricciardulli, Kyle Hilburn

  • 1Remote Sensing Systems, 438 First Street, Santa Rosa, CA 95401, USA. frank.wentz@remss.com

Science (New York, N.Y.)
|June 2, 2007
PubMed
Summary
This summary is machine-generated.

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Global warming increases atmospheric water vapor by 7% per kelvin. However, satellite data show precipitation rising at the same rate, contradicting climate model predictions of a slower increase.

Area of Science:

  • Atmospheric science
  • Climate science
  • Remote sensing

Background:

  • Climate models project a 7% increase in atmospheric water per kelvin of warming.
  • Current climate models predict a slower increase in global precipitation (1-3% per kelvin).

Purpose of the Study:

  • To compare climate model precipitation projections with satellite observations.
  • To investigate the observed relationship between atmospheric water and precipitation changes.

Main Methods:

  • Analysis of satellite observations of atmospheric water and precipitation.
  • Comparison of observed trends with climate model outputs.

Main Results:

  • Satellite data indicate precipitation has increased at approximately 7% per kelvin of warming.

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  • Observed precipitation increase matches the rate of total atmospheric water increase.
  • This contradicts climate model predictions of a muted precipitation response.

    • Conclusions:

    • Recent satellite observations challenge climate model projections of precipitation response to warming.
    • The findings suggest precipitation may be more sensitive to global warming than previously modeled.