The Development of the New GEOS-MITgcm Atmosphere-ocean Model for Coupled Data Assimilation System
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Dr. Ehud Strobach
NASA GMAO/UMD ESSIC
Monday September 17, 2018, 12:00-1:00 PM
ESSIC Conference Room 4102, 5825 University Research Ct, College Park, MD 20740
Abstract:
During the last two plus decades, The Goddard Earth Observing System (GEOS) and Massachusetts Institute of Technology (MIT) modeling groups have developed, respectively, atmosphere-only and ocean-only global general circulation models. These two models (GEOS and MITgcm) have demonstrated their data assimilation capabilities with the recent releases of the Modern Era Reanalysis for Research Applications, Version 2 (MERRA-2) atmospheric reanalysis and the Estimating the Circulation and Climate of the Ocean, Version 4 (ECCO-v4) ocean (and sea ice) state estimate. Independently, the two modeling groups have also produced global atmosphere-only and ocean-only simulations with km-scale grid spacing which proved invaluable for process studies and for the development of satellite and in-situ sampling strategies.
Recently, a new effort has been made to couple these two models and to leverage their data-assimilation and high resolution capabilities (i.e., eddy-permitting ocean, cloud-permitting atmosphere). The focus in the model development is put on sub-seasonal to decadal time scales. In this talk, I discuss the new coupled model and present some first high resolution (~10km) coupled simulation results as well as several ocean-only simulations aimed to imitate different flavors of the future coupled data assimilation system.
Bio-sketch:
Dr. Ehud Strobach is a climate modeler and a post-doctoral associate at NASA GMAO and at UMD ESSIC. During his Ph.D., he has analyzed and developed methods to improve climate models predictions/projections and to reduce their associated uncertainties. This was done using various machine learning algorithms and different statistical methods. Currently, his research focuses on climate model development, in particular, on the coupling between the atmosphere and the ocean-seaice and the interactions between these two components. More information can be found on his personal webpage at http://udistr.wixsite.com/ehud-strobach
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