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4d-var developement at gmao
| Content Provider | NASA Technical Reports Server (NTRS) |
|---|---|
| Author | Akkraoui, Amal El Pelc, Joanna S. Todling, Ricardo |
| Copyright Year | 2014 |
| Description | The Global Modeling and Assimilation Offce (GMAO) is currently using an IAU-based 3D-Var data assimilation system. GMAO has been experimenting with a 3D-Var-hybrid version of its data assimilation system (DAS) for over a year now, which will soon become operational and it will rapidly progress toward a 4D-EnVar. Concurrently, the machinery to exercise traditional 4DVar is in place and it is desirable to have a comparison of the traditional 4D approach with the other available options, and evaluate their performance in the Goddard Earth Observing System (GEOS) DAS. This work will also explore the possibility for constructing a reduced order model (ROM) to make traditional 4D-Var computationally attractive for increasing model resolutions. Part of the research on ROM will be to search for a suitably acceptable space to carry on the corresponding reduction. This poster illustrates how the IAU-based 4D-Var assimilation compares with our currently used IAU-based 3D-Var. |
| File Size | 51607373 |
| Page Count | 1 |
| File Format | |
| Alternate Webpage(s) | http://archive.org/details/NASA_NTRS_Archive_20150000348 |
| Archival Resource Key | ark:/13960/t51g5pw80 |
| Language | English |
| Publisher Date | 2014-08-16 |
| Access Restriction | Open |
| Subject Keyword | Gmao Das Rom Assimilation Numerical Analysis Algorithms Data Acquisition Atmospheric Models Reliability Analysis Mathematical Models Numerical Weather Forecasting Data Reduction Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science |
| Content Type | Text |
| Resource Type | Presentation |
