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TES Water Vapor Isotope Data used to Evaluate Moisture Processes in Climate Models

08.04.2011

Differences between TES data and climate models are due to rainfall, evaporation and mixing processes: These processes have a significant impact on the tropical moisture budget and on trace gas transport but until recently there have been few measurements to evaluate their representation in models.

 TES data averaged over a year
Model estimates with different rainfall evaporation efficiencies
(Top Left Panel) TES data averaged over a year
(Left Middle and Left Bottom Panel) Model estimates with different rainfall evaporation efficiencies
(Right Panels) difference between model and data. Bottom right panel shows the best overall agreement
Conclusion: Efficiency of rainfall evaporation explains much of the difference in isotopic composition of water vapor for models over the tropical oceans and continents

From Yoshimura et al., JGR 2011

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