Three-dimensional tropospheric water vapor in coupled climate models compared with observations from the AIRS satellite system

Details Three-dimensional tropospheric water vapor in coupled climate models compared with observations from the AIRS satellite system Three-dimensional tropospheric water vapor in coupled climate models compared with observations from the AIRS satellite system

Nov 2006

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006georl..3321701p&link_type=abstract

Geophysical Research Letters, Volume 33, Issue 21, CiteID L21701

Physics

14

Atmospheric Composition And Structure: General Or Miscellaneous, Global Change: Climate Variability (1635, 3305, 3309, 4215, 4513), Global Change: Global Climate Models (3337, 4928)

Scientific paper

Changes in the distribution of water vapor in response to anthropogenic forcing will be a major factor determining the warming the Earth experiences over the next century, so it is important to validate climate models' distribution of water vapor. In this work the three-dimensional distribution of specific humidity in state-of-the-art climate models is compared to measurements from the AIRS satellite system. We find the majority of models have a pattern of drier than observed conditions (by 10-25%) in the tropics below 800 hPa, but 25-100% too moist conditions between 300 and 600 hPa, especially in the extra-tropics. Analysis of the accuracy and sampling biases of the AIRS measurements suggests that these differences are due to systematic model errors, which might affect the model-estimated range of climate warming anticipated over the next century.

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