VALue of the RAPID-WATCH Climate Change programme array project (VALOR) Logo
Numerical data from the Global Ocean Physics Reanalysis UR025.3 (1989-2010) as part of the VALue of the RAPID-WATCH Climate Change programme array (VALOR) project
Update Frequency: Not Planned
Status: Completed
Online Status: ONLINE
Publication State: Citable
Publication Date: 2013-06-27
DOI Publication Date: 2013-07-11
Download Stats: last 12 months

This dataset is one of 2 global ocean reanalyses (named UR025.3 and UR025.4) produced by National Centre for Earth Observation at the University or Reading as part of the EU MyOcean project. Both datasets have been validated against observations. This dataset contains monthly mean output from UR025.3 reanalysis (which uses an older version of the NEMO model v2.3 and assimilates only EN3 T/S profile data).

Citable as:  Natural Environment Research Council; Valdivieso, M.; Haines, K. (2013): Numerical data from the Global Ocean Physics Reanalysis UR025.3 (1989-2010) as part of the VALue of the RAPID-WATCH Climate Change programme array (VALOR) project. NCAS British Atmospheric Data Centre, 11 July 2013. doi:10.5285/aef749ed-3ee9-4ce0-a0f9-e5bb369b5861.
Keywords:  RAPID, NEMO, Climate Change
Previous Info:
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Public data: access to these data is available to both registered and non-registered users.
Use of these data is covered by the following licence: When using these data you must cite them correctly using the citation given on the CEDA Data Catalogue record.
Not defined
Data lineage:

Data were prepared by the RAPID-Watch VALOR team before submission to the BADC for archival

Data Quality:
Not known.
File Format:
Data are netCDF formatted
Process overview
This dataset was generated by the computation detailed below.

University of Reading NEMO coupled ice-ocean model v2.3
Model: NEMO coupled ice-ocean model v2.3 Configuration: ORCA025_LIM2 (1/4o by 46 vertical levels) Data assimilated: UR025.3 assimilates in situ temperature and salinity observations that were obtained from the UK Met Office quality controlled ENACT/ENSEMBLES (EN3_v2a) dataset available from ( A detailed description of the data set including the quality control processing is presented in Ingleby and Huddleston (2007). Assimilation method: Temperature profiles (T) are assimilated along with a salinity balancing increment following the method of Troccoli and Haines, 1999). Salinity profiles (S) are then assimilated along isotherms (i.e., S(T)) up to latitudes of around 50oN/S, using the methodology described by Haines et al. (2006). At higher latitudes salinity is assimilated in a univariate way on z levels. Model – data differences (innovations) are evaluated at the closest model time step, and assimilation increments are calculated every 5 days. Increments are then introduced into the model evenly over the following day (Incremental Analysis Updating, Bloom et al., 1996). Smith and Haines (2009) give more details of the assimilation methodology. Surface Forcing: Surface atmospheric forcing for UR025.3 is obtained from ECMWF ERA-Interim atmospheric reanalysis (Simmons et. al., 2007; Dee and Uppala, 2009; Dee et al., 2011). The ERA-Interim reanalysis provides 10-m wind, 2-m air humidity and 2-m air temperature to compute 6-hourly turbulent air/sea and air/sea-ice fluxes during model integration, using the bulk formula proposed by Large and Yeager (2004, 2009). Downwelling short and long wave radiative fluxes and precipitation are also provided by ERA-Interim. The river runoff is Dai and Trenberth (2002). To prevent drift in the density distributions, a sea surface salinity relaxation to the WOA05 climatology, Boyer et al (2006), is applied with a timescale of 180 days for the top 10 m at the ice-free surface, decreasing to 36 days under ice.
Input Description
Output Description
Software Reference
No variables found
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Temporal Range
Geographic Extent

-180.0000°     180.0000°
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