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The impact of the assimilation of aquarius sea surface salinity data in the geos ocean data assimilation system
| Content Provider | NASA Technical Reports Server (NTRS) |
|---|---|
| Author | Vernieres, Guillaume Rene Jean Akella, Santharam Keppenne, Christian L. Brucker, Ludovic Dinnat, Emmanuel Phillippe Kovach, Robin M. |
| Copyright Year | 2014 |
| Description | Ocean salinity and temperature differences drive thermohaline circulations. These properties also play a key role in the ocean-atmosphere coupling. With the availability of L-band space-borne observations, it becomes possible to provide global scale sea surface salinity (SSS) distribution. This study analyzes globally the along-track (Level 2) Aquarius SSS retrievals obtained using both passive and active L-band observations. Aquarius alongtrack retrieved SSS are assimilated into the ocean data assimilation component of Version 5 of the Goddard Earth Observing System (GEOS-5) assimilation and forecast model. We present a methodology to correct the large biases and errors apparent in Version 2.0 of the Aquarius SSS retrieval algorithm and map the observed Aquarius SSS retrieval into the ocean models bulk salinity in the topmost layer. The impact of the assimilation of the corrected SSS on the salinity analysis is evaluated by comparisons with insitu salinity observations from Argo. The results show a significant reduction of the global biases and RMS of observations-minus-forecast differences at in-situ locations. The most striking results are found in the tropics and southern latitudes. Our results highlight the complementary role and problems that arise during the assimilation of salinity information from in-situ (Argo) and space-borne surface (SSS) observations |
| File Size | 1852903 |
| Page Count | 30 |
| File Format | |
| Alternate Webpage(s) | http://archive.org/details/NASA_NTRS_Archive_20140012074 |
| Archival Resource Key | ark:/13960/t46q6zf2n |
| Language | English |
| Publisher Date | 2014-03-27 |
| Access Restriction | Open |
| Subject Keyword | Salinty Sss Geos 5 Nasa Programs Assimilation In Situ Measurement Earth Observing System Eos Bias Air Water Interactions Satellite Observation Ocean Data Acquisitions Systems Sea Water Salinity Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science |
| Content Type | Text |
| Resource Type | Article |
