Three papers supported by NOAA CPO’s Modeling, Analysis, Predictions, and Projections (MAPP) and Climate Variability and Predictability (CVP) programs as well as NOAA’s Climate and Global Change Postdoctoral Fellowship program were recently published online in the Journal of Geophysical Research-Atmosphere, documenting progress in the Madden-Julian Oscillation (MJO) global model evaluation project. The goal of this project, led by the Working Group on Numerical Experimentation (WGNE) MJO Task Force and the Global Energy and Water Exchanges Project (GEWEX) Global Atmospheric System Studies (GASS) Panel, is to improve understanding of the role of convection, cloud, radiative, and dynamic processes in the development and evolution of the MJO for better representation in models and improved weather and climate prediction. These three papers, led respectively by Xianan Jiang (University of California, Los Angeles) et al., Prince K. Xavier (U.K. Met Office) et al., and Nicholas P. Klingaman (University of Reading) et al. focus on improvements in model simulation of vertical structure and diabatic processes of the MJO resulting from 20-year climatological simulations, 2-day MJO hindcasts, and 20-day MJO hindcasts. Overall, the studies suggest that simulating the MJO remains a major challenge and that model developers should focus on the relationship between convection and both total moisture and its rate of change in order to improve MJO simulation. NOAA support of research to advance MJO models is critical for improving weather and climate forecasts.
To access these papers, go to: http://onlinelibrary.wiley.com/doi/10.1002/2014JD022375/abstract (Xianan Jiang et al.),http://onlinelibrary.wiley.com/doi/10.1002/2014JD022718/abstract (Prince K. Xavier et al.), andhttp://onlinelibrary.wiley.com/doi/10.1002/2014JD022374/abstract (Nicholas P. Klingaman et al.).
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