| Actualités | Documentation | Liens | Nous Contacter | Rechercher | Accès réservé |
  • French
Accueil arrow Support technique arrow Les données arrow MERRA-2

Accueil
- - - - - - - - - - - - - - - - - - - -
Catalogue de données
- - - - - - - - - - - - - - - - - - - -
Accéder à ClimServ
- - - - - - - - - - - - - - - - - - - -
Support technique
Etat du Cluster
- - - - - - - - - - - - - - - - - - - -
Orbitographie (Ixion)

MERRA-2 Version imprimable
Index de l'article
MERRA-2
Coverage
Levels
Parameters
Access
Format
Documents

 A subset of the MERRA-2 (Modern-Era Retrospective analysis for Research and Applications version 2 ) reanalysis is available on ClimServ.

MERRA-2 is a NASA atmospheric reanalysis for the satellite era using the Goddard Earth Observing System Model, Version 5 (GEOS-5) with its Atmospheric Data Assimilation System (ADAS), version 5.12.4. The MERRA project focuses on historical climate analyses for a broad range of weather and climate time scales and places the NASA EOS suite of observations in a climate context.

MERRA-2 was initiated as an intermediate project between the aging MERRA data and the next generation of Earth system analysis envisioned for the future coupled reanalysis. Without a substantial investment to update MERRA's data assimilation routines, the system lacked the capability to analyze the latest observations. In addition, numerous advances to the GEOS5 system had been implemented since freezing the MERRA system in 2008. Therefore, a new full reanalysis integration was undertaken. MERRA-2 covers the period 1980-present, continuing as an ongoing climate analysis as resources allow.

MERRA-2 output data resemble output at frequencies higher than the 6-hourly analyses. Two-dimensional diagnostics (surface fluxes, radiation, single level meteorology for those archived at IPSL) are produced at 1-hour intervals. These data products and the 3-hourly three-dimensional atmospheric analyses are also available at the full spatial resolution (1/2 degrees latitude × 2/3 degrees longitude).

The original files extracted at NASA GES DISC are in netcdf-4 format on ClimServ.

Four MERRA-2 datasets are available on ClimServ:

-M2I3NVASM (inst3_3d_asm_Nv): 3d,3-Hourly,Instantaneous,Model-Level,Assimilation,Assimilated Meteorological Fields (Thanks to B. Legras -LMD for his help for the 3d data access)

-M2T1NXFLX (tavg1_2d_flx_Nx): MERRA IAU 2D diagnostics, surface fluxes, time averaged, single level, at native resolution

-M2T1NXRAD (tavg1_2d-rad_Nx) :MERRA IAU 2D diagnostics, radiation surface and TOA, time averaged, single level, at native resolution

-M2T1NXSLV (tavg1_2d_slv_Nx): MERRA IAU 2D diagnostics, single-level  meteorology, time averaged, single level, at native resolution



Dernière mise à jour : ( 30-03-2017 )
 
Suivant >