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

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


Feature Released 08.04.2011

From Yoshimura et al., JGR 2011