Grids of the multi-annual means of annual sunshine duration over Germany

Grids are derived from DWD stations and legally and equivalent partner stations in Germany.

Citation proposal
(2019) . Grids of the multi-annual means of annual sunshine duration over Germany. https://gdk.gdi-de.org/geonetwork/srv/api/records/de.dwd.klm.cdc.general.GRD_DEU_P30Y_SD_P1Y

Simple

Date ( Publication ): 2019-01-02

Identifier: https://registry.gdi-de.org/id/de.bund.dwd/de.dwd.klm.cdc.general.GRD_DEU_P30Y_SD_P1Y

Presentation form: Digital map

Purpose: The climate reference maps are produced for the climatological reference periods to support climatological analysis.

Originator

Deutscher Wetterdienst Deutscher Wetterdienst

Maintenance and update frequency: Not planned

Update scope: Dataset

Descriptive keywords

WMO_CategoryCode.discipline
GEMET.theme
de.dwd.klm.cdc.topic
place
INSPIRE.SpatialScope

Use constraints: Intellectual property rights

Use limitation: Use limitations: No limitations apply.

Use constraints: Other restrictions

Other constraints: Use constraints: 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".

Access constraints: Other restrictions

Other constraints: Zugriffseinschränkungen: Es gelten keine Bedingungen. Zugriffseinschränkungen: Es gelten keine Bedingungen. Access constraints: No conditions apply.

Classification: Unclassified

Spatial representation type: Grid

Distance: 1.001 km

Denominator: 1000000

Metadata language: German

Topic category

Climatology, meteorology, atmosphere

Reference system identifier: http://www.opengis.net/def/crs/EPSG/0/31467

Reference system identifier: http://www.opengis.net/def/crs/EPSG/0/3034

Distribution format

OGC-WMS Web Map Service (2.0.0 )

Specification
ascii-grid ( )

Specification

Publisher

Deutscher Wetterdienst Deutscher Wetterdienst

Frankfurter Strasse 135 Offenbach am Main 63067 Bundesrepublik Deutschland

+49 (0) 69 8062-0

+49 (0) 69 8062-4499

Website: http://www.dwd.de

OnLine resource: WMS Capabilities Dokument für GRD_DEU_P30Y_SD_P1Y
Zugriff auf das WMS Capabilities Dokument für GRD_DEU_P30Y_SD_P1Y

OnLine resource

DWD OpenData-Server: Verzeichnis der Klimareferenzkarten

Directory with grid files of climate

reference maps on the OpenData-Server of the DWD (free access). Please take

note of the locally available dataset descriptions!

Hierarchy level: Dataset

Conformance result

Date ( Publication ): 2010-12-08

Explanation: validated with http://inspire.ec.europa.eu/validator against TG 2.0

Pass: true

Statement

The grids for 1961-1990 are based on homogenized station data [Herzog und Müller-Westermeier, 1998]. The 30 year averages were calculated for or each calendar month of the year before the spatial interpolation. The gridding method is based on height regression and Inverse Distance Weight (IDW), see Müller-Westermeier, 1995: The station density allows for a linear regression between topographic height and climatological parameters within a region, and varies somewhat between the regions in Germany [Maier undMüller-Westermeier, 2010]. The regression coefficients were determined seperately for each month, based on the monthly means recorded 1951-1980.

Using these interpolated regression coefficients, in a first step, the station values are reduced to the reference height and attributed to the grid cells. In case several stations refer to a grid cell, the mean was taken.

In a second step, the values at reference height were interpolated horizontally to cover the grid (weighted with the inverse square distance).

Finally, in a third step, the values at reference height are transformed to values corresponding to the topographic elevation using again the spatially variable regression function. This is done with the DWD digital topographic height model.When grid cells contain a station,the value of the latter is simply interpolated vertically to the height of the grid cell.