My GeoNetwork catalogue
Hourly 2D- and 3D-parameters of the regional reanalysis COSMO-REA6
This dataset is a subset from the regional reanalysis COSMO-REA6, which is based on COSMO-EU model version 4.25. The calculations were performed within the HErZ project at University of Bonn (up to 2014) and extended afterwards by DWD until the dataset was finished in August 2019.
Simple
- Alternate title
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urn:x-wmo:md:de.dwd.cdc::rea-cosmo_rea6.pt1h
- Date (Publication)
- 2021-11-04
- Date (Revision)
- 2021-11-16
- Edition
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v1.0
- Edition date
- 2021-04-20
- Citation identifier
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urn:x-wmo:md:de.dwd.cdc::rea-cosmo_rea6.pt1h
CDC2.1:WMO-URN CDC2.1:WMO-URN 2021
+49 (0) 69 8062-34162
www.dwd.de
- Presentation form
- Digital table
- Status
- Completed
+ 49 (0) 69 8062-4499
www.dwd.de
- Maintenance and update frequency
- nach Bedarf
- Update scope
- Dataset
- Maintenance note
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This version is a result of a research project. It is possible that errors in the metadata or the data itself are detected and corrected. That will be documented in the file ( https://opendata.dwd.de/climate_environment/REA/Change_log_REA_OD.txt ), however, no versions of the COSMO-REA6 dataset will be saved.
COSMO-REA6 will not be continued past August 2019 because the boundary conditions ERA-Interim were discontinued.
+ 49 (0) 69 8062-4499
https://dwd.de
- Hours of service
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09:00 - 16:00
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DWD Climate Data Center Vocabulary - Datenherkunft
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COSMO-RA6
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DWD Climate Data Center Vocabulary - Geoserver Dimension: Zeit
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1 hour
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GEMET - INSPIRE themes, version 1.0
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Atmosphärische Bedingungen
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Meteorologisch-geografische Kennwerte
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INSPIRE - Spatial scope
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European
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DWD Modell COSMO - 2D Parameter
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RAIN_CON - convective rain in kg/m^2
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H_PBL - height of the planetary boundary layer in m
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ASWDIR_S - short wave direct radiation flux at the surface in W/m^2
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ATHD_S - long wave downward radiation flux at the surface in W/m^2
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PMSL - pressure at mean sea level in Pa
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QV_S - Specific humidity at the surface in kg/kg
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ALWU_S - long wave upward radiation flux at surface in W/m^2
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ASWDIFD_S - short wave diffuse downward radiation flux at the surface in W/m^2
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QV_2M - 2m specific humidity in kg/kg
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ATHB_S - net long wave radiation flux at the surface in W/m^2
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CLCT - total cloud cover in %
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PS - not reduced surface pressure in Pa
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LWU_S - long wave upward radiation flux at the surface in W/m^2
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ASOB_S - net short wave radiation flux at the surface in W/m^2
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DURSUN - sunshine duration in s
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RAIN_GSP - stratiform rain in kg/m^2
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RELHUM_2M - 2m relative humidity in %
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RUNOFF_G - ground runoff in kg/m^2
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RUNOFF_S - surface runoff in kg/m^2
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SNOW_CON - convective snow in kg/m^2
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SOBS_RAD - net short wave radiation flux at the surface in W/m^2
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SNOW_GSP - stratiform snow in kg/m^2
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SWDIFDS_RAD - short wave diffuse downward radiation flux at the surface in W/m^2
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SWDIRS_RAD - short wave direct radiation flux at the surface in W/m^2
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T_2M - 2m temperature in K
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THBS_RAD - net long wave radiation flux at the surface in W/m^2
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THDS_RAD - downward long wave radiation flux at the surface in W/m^2
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TMAX_2M - 2m maximum temperature in K
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TMIN_2M - 2m minimum temperature in K
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TOT_PRECIP - total precipitation in kg/m^2
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U_10M - 10m zonal wind speed in m/s
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TQV - vertical integrated water vapour in kg/m^2
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T_SOIL - soil temperature in K
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VMAX_10M - 10m maximum wind speed in m/s
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W_SNOW - surface snow amount in kg/m^2
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V_10M - 10m meridional wind speed in m/s
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LHFL_S - surface latent heat flux in W/m^2
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H_SNOW - thickness of snow in m
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SHFL_S - surface sensible heat flux in W/m^2
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SNOWLMT - height of the snow fall limit in m above sea level in m
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RHO_SNOW - density of snow in kg/m^3
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T_SNOW - snow surface temperature in K
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- Keywords
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opendata
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DWD Modell COSMO - 3D Parameter
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Q - specific humidity in kg/kg
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TKE - turbulent kinetic energy in m^2/s^2
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V - meridional wind speed in m/s
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T - temperature in K
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U - zonal wind speed in m/s
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- Specific usage
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The wind components are given for the rotated longitude-latitide grid of the COSMO-model. Before a calculation of wind direction, the horizontal wind components have to be converted to geographical co-ordinates, see Schulz und Schättler, 2014, section 4.1.4. For calculation of the scalar wind velocity, the co-ordinate transormation is not relevant. The latitudes and longitudes are given for the center of the grid cell. The model gives wind components for the corners of the grid cell (not the center of the grid cell). For further processing (i.e., shifting half a grid cell) the climate data operators (cdo) are recommended, see, e.g., an example to getting started ( https://opendata.dwd.de/climate_environment/REA/COSMO_REA6/help_COSMO_REA6/COSMO_REA6_Startbeispiel.pdf ) and
start help ( https://opendata.dwd.de/climate_environment/REA/COSMO_REA6/help_COSMO_REA6/COSMO_REA6_Starthilfe.pdf ). The latter document also explains the peculiarities of grib1 format handling.
- User determined limitations
- considerations
+49 (0) 69 8062-34162
www.dwd.de
- Specific usage
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The reanalysis combines observations and model given the boundary conditions to obtain an optimal estimate for the atmosphere. Uncertainties are caused by model errors, errors of the observing system, errors by the data assimilation technique and by boundary condition errors. The aim of the reanalysis is to treat these uncertainties in the data assimilation process. Note that the resulting analysis is valid on a larger scale, i.e., local effects are not captured. The nominal resolution is 6km x 6km; the effective resolution is coarser and determined by the resolution of dynamical processes within the COSMO-model. A rule of thumb for the highest resolution to consider is 5 grid cells, keeping in mind that many small scale processes are neither observed nor modelled. It can be expected that the reanalysis captures the synoptic scale (weather systems) very well.
- User determined limitations
- uncertainties
+49 (0) 69 8062-34162
www.dwd.de
- Use limitation
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Use limitations: No limitations apply.
- Use limitation
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The Ordinance to Determine the Conditions for Use for the Provision of Spatial Data of the Federation ("Verordnung zur Festlegung der Nutzungsbestimmungen für die Bereitstellung von Geodaten des Bundes" - GeoNutzV) shall apply, for details turn to http://www.geodatenzentrum.de/docpdf/geonutzv_eng.pdf and http://www.dwd.de/EN/service/copyright/copyright_artikel.html .
For the COSMO-REA6 reanalysis the especially adjusted terms & conditions apply which can be consulted via https://opendata.dwd.de/climate_environment/REA/Terms_of_use_REA.txt .
- Use constraints
- Copyright
- Access constraints
- Other restrictions
- Other constraints
- no limitations to public access
- Access constraints
- Other restrictions
- Other constraints
- No conditions apply to access and use
- Classification
- Unclassified
- Spatial representation type
- Grid
- Language
- Deutsch
- Topic category
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- Climatology, meteorology, atmosphere
- Geoscientific information
- Description
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Europe: CORDEX EUR-11
height levels: lowest 6 model levels which correspond over the ocean to 10m, 35m, 69m, 116m, 178m, 258m asl.
))
- Geographic identifier
- Europe CORDEX EUR-11
- Begin date
- 1995-01-01
- End date
- 2019-08-31
- Supplemental Information
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Known problems: artifacts due to low-quality pressure measurements which have been nudged (some cases were found over the Atlantic). These can lead to small-scale, rather stationary storms, an unrealistic feature which lasts only a few hours.
- Unique resource identifier
- urn:ogc.external::1000003 - COSMO projection
- Number of dimensions
- 3
- Dimension name
- Row
- Dimension size
- 824
- Resolution
- 6 km
- Dimension name
- Column
- Dimension size
- 848
- Resolution
- 6 km
- Dimension name
- Time
- Dimension size
- 2161241
- Resolution
- 1 hour
- Cell geometry
- Area
- Distribution format
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OGC Services and OpenData files (free access)
()
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GRIB
(
1.x
)
- Specification
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GRIB – WMO General Regularly-distributed Information in Binary form
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OGC Services and OpenData files (free access)
()
+ 49 (0) 69 8062-4499
www.dwd.de
- OnLine resource
- Schulz J.-P. und Schättler, U.: Kurze Beschreibung des Lokal-Modells Europa COSMO-EU (LME) und seiner Datenbanken auf dem Datenserver des DWD, Stand: 13. 06. 2014, DWD report, 2014. ( WWW:LINK-1.0-http--related )
- OnLine resource
- D.P. Dee, S.M. Uppala, A.J. Simmons, P. Berrisford, P. Poli, S. Kobayashi, et al.: The ERA-interim reanalysis: configuration and performance of the data assimilation system, Q. J. R. Meteorol. Soc., 137, 553-597, doi:10.1002/qj.828, 2011. ( WWW:LINK-1.0-http--related )
- OnLine resource
- Kaiser-Weiss, A. K., Kaspar, F., Heene, V., Borsche, M., Tan, D. G. H., Poli, P., Obregon, A., and Gregow, H.: Comparison of regional and global reanalysis near-surface winds with station observations over Germany, Adv. Sci. Res., 12, 187-198, doi:10.5194/asr-12-187-2015, 2015. ( WWW:LINK-1.0-http--related )
- OnLine resource
- Borsche, M., Kaiser-Weiss, A. K. and Kaspar, F.: Wind speed variability between 10 and 116m height from the regional reanalysis COSMO-REA6 compared to wind mast measurements over Northern Germany and the Netherlands , Adv. Sci. Res., 13, 151-161, doi:10.5194/asr-13-151-2016, 2016. ( WWW:LINK-1.0-http--related )
- OnLine resource
- Bollmeyer, C., Keller, J. D., Ohlwein, C., Wahl, S., Crewell, S., Friederichs, P., Hense, A., Keune, J., Kneifel, S., Pscheidt, I., Redl, S., and Steinke, S.: Towards a high-resolution regional reanalysis for the European CORDEX domain, Q. J. Roy. Meteorol. Soc., 141, 1–15, doi:10.1002/qj.2486, 2015. ( WWW:LINK-1.0-http--related )
- OnLine resource
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COSMO_REA6_PT1H_2D
(
WWW:LINK-1.0-http--download
)
In the 2D/ folder, for each of the parameters, a subfolder with data as bunzip2-archives is provided. The naming scheme of the bunzip2-archives is: {parameter}/{parameter}.2D.{YYYYMM}.grb.bz2
The fields are provided in the original COSMO format (DWD grib1). For convenience, the data are packed into monthly archives. They are compressed with bzip2 resulting in sizes of 0.8 GB per archive, respectively. After decompressing with bunzip2 the *.grb files can be processed with the ecCodes (grib tool by ECMWF), the CDO (climate data operators), or the outdated tool wgrib.
- OnLine resource
- Kaspar, F., Niermann, D., Borsche, M., Fiedler, S., Keller, J., Potthast, R., Rösch, T., Spangehl, T., and Tinz, B.: Regional atmospheric reanalysis activities at Deutscher Wetterdienst: review of evaluation results and application examples with a focus on renewable energy, Adv. Sci. Res., 17, 115–128, https://doi.org/10.5194/asr-17-115-2020, 2020. ( WWW:LINK-1.0-http--related )
- OnLine resource
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COSMO_REA6_PT1H_3D
(
WWW:LINK-1.0-http--download
)
In the 3D/ folder, for each of the parameters and years, a subfolder with data as bunzip2-archives is provided. The naming scheme of the bunzip2-archives is: {parameter}/{YYYY}/{parameter}.3D.{YYYYMM}.tar.bz2.
The bunzip2 archives contain the data of the lowest 6 model levels of the given parameter.
The fields are provided in the original COSMO format (DWD grib1). For convenience, the data are packed into daily archives. They are compressed with bzip2 resulting in sizes of 0.2 GB per archive, respectively. After decompressing with bunzip2 the *.grb files can be processed with the ecCodes (grib tool by ECMWF), the CDO (climate data operators), or the outdated tool wgrib.
- OnLine resource
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COSMO_REA6_PT1H_2D_CONVERTED
(
WWW:LINK-1.0-http--download
)
Selected parameters are provided in NetCDF-4 format. The naming scheme of the NetCDF-4 archives is: {parameter}_{model_level}/{parameter}_{model_level}m.2D.{YYYMM}.nc4
- OnLine resource
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help_COSMO_REA6
(
WWW:LINK-1.0-http--link
)
This source provides some educational material like an example of getting started and some explanation of the peculiarities of grib1 format handling.
- OnLine resource
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doi:10.26050/WDCC/CR6_EU6
(
WWW:LINK-1.0-http--download
)
Dieser Datensatz basiert auf ausgewählten COSMO-REA6-Daten, die vom DWD unter https://opendata.dwd.de/climate_environment/REA/ bereitgestellt werden.
Die Daten werden über die Earth System Grid Federation (ESGF) Knoten und das World Data Center for Climate (WDCC) als NetCDF-Dateien bereitgestellt. Sie wurden einer CMIP/CORDEX-ähnlichen Standardisierung ("CMORisation") unterzogen, die im Rahmen des NFDI4Earth-Pilotprojekts OcMOD (Observations closer to MOdel Data) in Zusammenarbeit zwischen DKRZ und DWD durchgeführt wurde,
Die Daten umfassen auch eine etwas andere Auswahl von Parametern, als der DWD Basisdatensatz.
Die Auswahl der Parametern wurde durch eine Gemeinschaftsumfrage ermittelt ( https://c6dreq.dkrz.de/files/ocmod_dreq.php ).
Die CMORisierungsbemühungen im Rahmen des NFDI4Earth-Pilotprojekts wurden von der Deutschen Forschungsgemeinschaft (DFG - Projektnummer: 460036893) gefördert.
- Hierarchy level
- Dataset
Conformance result
- Date (Publication)
- 2010-12-08
- Pass
- Yes
Conceptual consistency
- Name of measure
- quality_estimation
Conformance result
- Explanation
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Validation studies for wind speed have been performed by comparing against station data (Kaiser-Weiss et al., 2015 and Niermann et al., 2019) and against wind tower measurements (Borsche et al., 2016) on the inter-annual, annual, monthly, daily and hourly scale and correlations confirm a realistic time evolution wind speed, and realistic relative frequency distributions and reasonable correlation coefficients with observations over Germany, for representative topography. The absolute value has to be used with care, as it depends on how the model topograpy relates to the real topography. This will be highly location dependent and requires own validation studies or transfere functions before use. Wind direction depend heavily on local topography and should be used after detailed and purpose oriented own validation, only.
- Pass
- Yes
- Statement
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The regional reanalysis is driven by the global reanalysis ERA-Interim at the boundaries (Dee et al., 2011), with updated boundary conditions every 3 hours and interpolated linearly in between. The COSMO model version is a fixed version 4.25 of 28th September 2012, driven with a 6-hourly snow analysis, 24-hourly sea surface temperature (SST)-analysis and 24-hourly soil moisture analysis. Data assimilation comprises contineous nudging of conventional observations (radiosondes, aircraft, wind profiler and surface level observations). The COSMO-REA6 regional reanalysis system is described in Bollmeyer et al., 2015. The regional reanalysis COSMO-REA6 was developed within the HErZ-cooperation at University of Bonn, covering 1995-2014, and was extended afterwards up to August 2019 by DWD.
- File identifier
- urn:x-wmo:md:de.dwd.cdc::rea-cosmo_rea6.pt1h XML
- Metadata language
- Deutsch
- Character set
- UTF8
- Hierarchy level
- Dataset
- Date stamp
- 2024-03-06T22:10:13
- Metadata standard name
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ISO 19115-2 Geographic information Metadata Part 2: Extensions for imagery and gridded data
- Metadata standard version
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ISO 19115-2:2009-02-15
+49 (0) 69 8062-34162
www.dwd.de
- Dataset URI
-
urn:x-wmo:md:de.dwd.cdc::rea-cosmo_rea6.pt1h
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