The Deutscher Wetterdienst, German pronunciation: [ˌdɔʏ̯ʧɐ ˈvɛtɐdiːnst], or DWD for short, is the German Meteorological Office, based in Offenbach am Main, Germany, which monitors weather and meteorological conditions over Germany and provides weather services for the general public and for nautical, aviational or agricultural purposes. It is attached to the Federal Ministry of Transport and Digital Infrastructure. The DWDs principal tasks include warning against weather-related dangers and monitoring and rating climate changes affecting Germany. The organization runs atmospheric models on their supercomputer for precise weather forecasting. The DWD also manages the national climate archive and one of the largest specialized libraries on weather and climate worldwide.
The DWD was formed in 1952 when the weather services of the western occupation zones were merged. In 1954, the Federal Republic of Germany joined the World Meteorological Organization (WMO). In 1975 the European Centre for Medium-Range Weather Forecasts (ECMWF) was formed for numerical weather prediction up to ten days in advance. In 1990, following the reunification, the weather services of the German Democratic Republic were incorporated in the DWD.
Since the 1990s, the DWD has continuously reduced the number of manned weather stations, which entailed substantial staff cutbacks. The DWD does not expect a reduction in forecast quality, given techniques like weather radar or satellites, which have significantly improved weather data collection.
Numerical weather prediction
The German Meteorological Office runs a global hydrostatic model of its own, the GME, using a hexagonal icosohedral grid since 2002. They developed the High Resolution Regional Model (HRM) in 1999, which is widely run within the operational and research meteorological communities and run with hydrostatic assumptions. The German non-hydrostatic Lokal-Modell for Europe (LME) has been run since 2002, and an increase in areal domain became operational on September 28, 2005. Since March 2009, the DWD operates a NEC SX-9 with a peak performance of 109 teraFLOPS to help in the weather forecasting process.
Since 2005, the DWD has been publishing regional warnings against heat with the aim to reduce heat related fatalities. This decision was made because of the hot summer in 2003, when estimated 7000 people died from direct or indirect effects of the heat. Additionally it sends out sea weather reports as radioteletype and faxes. Since 2006, the pollen warnings can be subscribed to for free on the DWD web site. Within its duty of primary meteorological information, the DWD offers a free daily weather report for Germany which can be subscribed to by email on their official website. DWD offers free access to its climate data.
The Deutsche Wetterdienst is attached to the Federal Ministry of Transport and Digital Infrastructure and thus closely linked to the German federal, regional and local governments, to the business community, and to the industrial world in terms of cooperation and consulting. Its work is based on the German Meteorological Office Act (Gesetz über den Deutschen Wetterdienst). Currently, the DWD consists of roughly 2600 occupants. Besides the DWD central in Offenbach, there are regional centers in Hamburg, Potsdam, Leipzig, Essen, Stuttgart and Munich. Additionally, it runs Germany's densest network of meteorological measurement points with 183 full-time meteorological stations (60 of them manned), as well as about 1784 extraordinal weather stations run by volunteering amateurs (2014).
- Kaspar, F.; Müller-Westermeier, G.; Penda, E.; Mächel, H.; Zimmermann, K.; Kaiser-Weiss, A.; Deutschländer, T. (2013). "Monitoring of climate change in Germany – data, products and services of Germany's National Climate Data Centre" (PDF). Adv. Sci. Res. 10: 99-106. doi:10.5194/asr-10-99-2013. Retrieved 2017-03-23.
- Eikenberg, S.; K. Frohlich; A. Seifert; S. Crewell & M. Mech (2011-02-25). "Evaluation of ice and snow content in the global numerical weather prediction model GME with CloudSat" (PDF). Geoscientific Model Development. 4: 422. Bibcode:2011GMDD....4..419E. doi:10.5194/gmdd-4-419-2011. Retrieved 2011-03-15.
- "HRM - Atmospheric Model". Brazilian Navy Hydrographic Center. 2009-09-29. Retrieved 2011-03-15.
- Schultz, J.-P. (2006). "The New Lokal-Modell LME of the German Weather Service" (PDF). Consortium for Small-scale Modeling (6). Retrieved 2011-03-15.
- "Neuer Computer sagt Wetter genauer voraus". Berliner Morgenpost (in German). March 18, 2009.
- Deutscher Wetterdienst: Climate Data Center FTP
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