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Evaluation of NASA GISS ModelE AR5 Simulated Global Cloud Fraction and Radiation Budgets Using the MODIS-CERES Observations and MERRA Reanalysis

ND

University of North Dakota/NASA Langley Research Center, Science Mission Directorate

The goal of this study is to investigate NASA GISS GCM biases and determine whether they are due to errors in the parameterizations of cloud and radiation or the model dynamics. In the meantime, other GCMs simulations in CMIP5 were also evaluated; including a total of 27 GCMs simulated cloud properties and radiation budgets. Cloud processes and properties, as well as their interactions with aerosols, are extremely important parts of the climate system. Their treatment in climate models is one of the largest sources of uncertainty in predicting any potential future climate change (IPCC Chapter 8, 2008). Dr. Dong’s research results have drawn NASA program manager’s attention. For example, four research highlights from Professor Dong’s group have been selected by NASA MAP program manager, Dr. David Considine, and recommended for the Monthly Status Report at NASA Headquarters. One highlight

reported the key improvements in GISS post-CMIP5 GCM simulated clouds and radiation compared with CERES-MODIS clouds and radiation results and other GCMs (Stanfield et al. 2014a, b; Dolinar et al. 2014). In the second highlight, an algorithm was developed to identify the width of the Intertropical Convergence Zone (ITCZ), and compared modeled ITCZ zones with TRMM and GPCP observations. ITCZ is a major feature of the global circulation, and its position is a good metric for testing GCMs (Stanfield et al. 2014c). A submittal is in work for the second term proposal to continuously investigate the GISS GCM simulated clouds, precipitation, radiation, related processes, and their relationships with large-scale atmospheric variables, which will help the NASA GISS modelers to improve their simulations and leverage the NASA GISS GCM results in the IPCC AR6.

Dr. Xiquan Dong, Science PI, University of North Dakota

Dr. Patrick Minnis, NASA Technical Monitor, Langley Research Center

www.nasa.gov/epscor/stimuli

NASA EPSCoR Stimuli 2014-15

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EPSCoR Stimuli 2014-15  

NASA Office of Education’s Aerospace Research & Career Development (ARCD) is pleased to release NASA EPSCoR Stimuli, a collection of univers...

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