An ocean data assimilation system and reanalysis of the World Ocean hydrophysical fields
| Autor: | Yu. D. Resnyanskii, R. M. Vil’fand, B. S. Strukov, A. A. Zelenko, P. I. Svirenko, Michael Tsyrulnikov |
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| Rok vydání: | 2016 |
| Předmět: |
Horizontal resolution
Atmospheric Science Meteorological reanalysis 010504 meteorology & atmospheric sciences Meteorology 010505 oceanography Temperature salinity diagrams Ocean general circulation model Oceanography 01 natural sciences Data assimilation Climatology Variational analysis Observation data Geology 0105 earth and related environmental sciences |
| Zdroj: | Izvestiya, Atmospheric and Oceanic Physics. 52:443-454 |
| ISSN: | 1555-628X 0001-4338 |
| Popis: | A new version of the ocean data assimilation system (ODAS) developed at the Hydrometcentre of Russia is presented. The assimilation is performed following the sequential scheme analysis–forecast–analysis. The main components of the ODAS are procedures for operational observation data processing, a variational analysis scheme, and an ocean general circulation model used to estimate the first guess fields involved in the analysis. In situ observations of temperature and salinity in the upper 1400-m ocean layer obtained from various observational platforms are used as input data. In the new ODAS version, the horizontal resolution of the assimilating model and of the output products is increased, the previous 2D-Var analysis scheme is replaced by a more general 3D-Var scheme, and a more flexible incremental analysis updating procedure is introduced to correct the model calculations. A reanalysis of the main World Ocean hydrophysical fields over the 2005–2015 period has been performed using the updated ODAS. The reanalysis results are compared with data from independent sources. |
| Databáze: | OpenAIRE |
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