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Status and Plans for Reanalysis at NASA/GMAOReanalysis plays a critical role in GMAOs goal to enhance NASA's program of Earth observations, providing vital data sets for climate research and the development of future missions. As the breadth of NASAs observations expands to include multiple components of the Earth system, so does the need to assimilate observations from currently uncoupled components of the system in a more physically consistent manner. GMAOs most recent reanalysis of the satellite era, MERRA-2, has completed the period 1980-present, and is now running as a continuing global climate analysis with two- to three-week latency. MERRA-2 assimilates meteorological and aerosol observations as a weakly coupled assimilation system as a first step toward GMAOs longer term goal of developing an integrated Earth system analysis (IESA) capability that will couple assimilation systems for the atmosphere, ocean, land and chemistry. The GMAO strategy is to progress incrementally toward an IESA through an evolving combination of coupled systems and offline component reanalyses driven by, for example, MERRA-2 atmospheric forcing. Most recently, the GMAO has implemented a weakly coupled assimilation scheme for analyzing ocean skin temperature within the existing atmospheric analysis. The scheme uses background fields from a near-surface ocean diurnal layer model to assimilate surface-sensitive radiances plus in-situ observations along with all other observations in the atmospheric assimilation system. In addition, MERRA-2-driven simulations of the ocean (plus sea ice) and atmospheric chemistry (for the EOS period) are currently underway, as is the development of a coupled atmosphere-ocean assimilation system. This talk will describe the status of these ongoing efforts and the planned steps toward an IESA capability for climate research.
Document ID
20170011574
Acquisition Source
Goddard Space Flight Center
Document Type
Presentation
Authors
Gelaro, Ron
(NASA Goddard Space Flight Center Greenbelt, MD, United States)
Date Acquired
December 6, 2017
Publication Date
November 13, 2017
Subject Category
Geosciences (General)
Earth Resources And Remote Sensing
Report/Patent Number
GSFC-E-DAA-TN50124
Meeting Information
Meeting: International Conference on Reanalysis
Location: Rome
Country: Italy
Start Date: November 13, 2017
End Date: November 17, 2017
Sponsors: European Centre for Medium-Range Weather Forecasts
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.
Keywords
MERRA-2
IES
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