Changes between Version 3 and Version 4 of Users/Reference Configurations/SEABASS


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Timestamp:
2017-04-12T22:21:28+02:00 (3 years ago)
Author:
nicolasmartin
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  • Users/Reference Configurations/SEABASS

    v3 v4  
    33Last edition: '''[[Wikinfo(changed_ts)]]''' by '''[[Wikinfo(changed_by)]]''' 
    44 
    5 SEABASS (Sea Box for Assimilation) is a NEMO reference configuration for Data Assimilation. SEABASS is of interest for DA systems developers and users.[[BR]] 
     5SEABASS (Sea Box for Assimilation) is a NEMO reference configuration for Data Assimilation. SEABASS is of interest for DA systems developers and users. 
    66 
     7For the first, SEABASS has been tested with various DA systems, from different methodological families (both probabilistic and variational method). It gives to DA developers the opportunity to compare the results of their own systems with those previous experiments. 
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    8 For the first, SEABASS has been tested with various DA systems, from different methodological families (both probabilistic and variational method). It gives to DA developers the opportunity to compare the results of their own systems with those previous experiments.[[BR]] 
     9For the users, SEABASS is a simple configuration to take in hand but that exhibits important characteristics of a turbulent oceanic circulation at midlatitudes (well-observed region, especially by altimetry satellites). 
    910 
    10 For the users, SEABASS is a simple configuration to take in hand but that exhibits important characteristics of a turbulent oceanic circulation at midlatitudes (well-observed region, especially by altimetry satellites).[[BR]] 
     11For NEMO DA components developers, this version ensures to provide a light validation platform (e.g. non-regressive test). 
    1112 
    12 For NEMO DA components developers, this version ensures to provide a light validation platform (e.g. non-regressive test). [[BR]]  
     13SEABASS is available as a reference configuration with the NEMO 3.4_STABLE version. 
    1314 
    14 SEABASS is available as a reference configuration with the NEMO 3.4_STABLE version.[[BR]] 
     15== Technical Description 
    1516 
     17SEABASS is an idealized configuration similar to the GYRE configuration, representing double gyres circulation, at mid-latitudes in the north hemisphere. Its principal characteristics are: 
     18- A non-rotated spheric grid, with a regular grid-spacing (between 24 and 44°N and 60°W and 30°W) 
     19- 11 vertical levels 
     20- Biharmonic viscosity and diffusion 
     21- Salinity is forced to 35.5 PSU 
     22- The only forcing is an analytical stationary zonal wind 
    1623 
    17 == Technical Description ==  
     24By default, the horizontal resolution of SEABASS is 1/4°. But, the horizontal resolution can be easily changed in modifying the `jp_cfg` variable in the `OPA_SRC/par_SEABASS.h90` file, before compilation. 
    1825 
    19 SEABASS is an idealized configuration similar to the GYRE configuration, representing double gyres circulation, at mid-latitudes in the north hemisphere. Its principal characteristics are:[[BR]] 
    20  
    21     -A non-rotated spheric grid, with a regular grid-spacing (between 24 and 44°N and 60°W and 30°W)[[BR]] 
    22     -11 vertical levels[[BR]] 
    23     -Biharmonic viscosity and diffusion[[BR]] 
    24     -Salinity is forced to 35.5 PSU[[BR]] 
    25     -The only forcing is an analytical stationary zonal wind[[BR]] 
    26  
    27 By default, the horizontal resolution of SEABASS is 1/4°. But, the horizontal resolution can be easily changed in modifying the jp_cfg variable in the OPA_SRC/par_SEABASS.h90 file, before compilation.[[BR]] 
    28  
    29 Below, a table summarizes essential parameters for different resolutions of the SEABASS configuration.[[BR]] 
    30 As previously said, jp_cfg has to be modified in the OPA_SRC/par_SEABASS.h90 source file before compilation. rn_rdt, rn_aht_0 and rn_ahm_0_blp have to be modified in the namelist.[[BR]] 
    31  
     26Below, a table summarizes essential parameters for different resolutions of the SEABASS configuration. 
     27As previously said, `jp_cfg` has to be modified in the OPA_SRC/par_SEABASS.h90 source file before compilation. `rn_rdt`, `rn_aht_0` and `rn_ahm_0_blp` have to be modified in the namelist. 
    3228||Horizontal resolution ||jp_cfg ||rn_rdt       ||rn_aht_0      ||rn_ahm_0_blp|| 
    3329||1/4°                  ||4      ||900          ||-8.E10        ||-8.E10      || 
    3430||1/12°                 ||12     ||300          ||-0.89E10      ||-0.89E10    || 
    3531 
    36 CPP keys and a reference namelist for SEABASS (at 1/4° horizontal resolution) can be found under the CONFIG/SEABASS/EXP00 directory. 
     32CPP keys and a reference namelist for SEABASS (at 1/4° horizontal resolution) can be found under the `CONFIG/SEABASS/EXP00` directory. 
    3733 
    38 SEABASS is described in Bouttier, P.-A., Blayo, E., & Verron, J. (2014). Towards variational assimilation of altimetric data in a high resolution ocean model. Newsletter Mercator Océan, [http://www.mercator-ocean.fr/sciences-publications/mercator-ocean-journal/newsletter-46-nemo-myocean/ September 2012] 
     34SEABASS is described in [http://www.mercator-ocean.fr/sciences-publications/mercator-ocean-journal/newsletter-46-nemo-myocean Bouttier, P.-A., Blayo, E., & Verron, J. (2014). Towards variational assimilation of altimetric data in a high resolution ocean model. Newsletter Mercator Océan, September 2012] 
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