Filterung luftchemischer Messreihen im Alpenraum zur Charakterisierung ihrer Repraesentanz GAW - DACH - Projekt

The GAW DACH project is a joint cooperation between the German, Austrian and Swiss (D-A-CH) Meteorological Agencies DWD, ZAMG and SMI. Further project partners were the German Federal Environment Agency, the Austrian Federal Environment Agency, the Institute for Analytical Chemistry (University Vienna), the Institute for Meteorology and Physics (Agricultural University Vienna), and the Swiss Federal Laboratory for Materials Testing and Research (EMPA). The DACH project aims at coordinating the national monitoring activities within the Global Atmosphere Watch (GAW) program of the World Meteorological Organization (WMO) by supplementing the monitoring program at the German global station Zugspitze/Hohenpeissenberg with measurements at Jungfraujoch (Switzerland) and Sonnblick (Austria). In particular, the main objectives of this cooperation are - to guarantee comparability of the data through quality control and use of common standards, - to build a common data base, - to investigate the spatial representativess of the data, - to develop filters for extracting data with extended spatial representativeness from the dataset. An important goal of GAW is the early detection of large scale changes in the atmosphere. Filter functions which point out concentration fluctuations caused by local meteorological and chemical processes are expected to be an important tool for detecting those trends earlier and more reliably. Such a trend analysis can be improved and made more representative in space by combining data from the three stations. Continental monitoring sites in complex terrain affected by relatively close highly populated and industrialized regions should basically cooperate for a representative picture of the area. The report summarizes results from the first three years of this cooperation. A short station description is followed by a climatological characterization through annual average wind direction and speed, as well as box plots of average annual variation of temperature, carbon monoxide, ozone and nitrogen oxides, including information on the concentration range of these trace substances. The stations are further characterized by back trajectory climatologies. The actual and intended monitoring program at the participating stations with respect to the needs for GAW is listed in a comprehensive table. (orig.)SIGLEAvailable from TIB Hannover: ZA 368(211) / FIZ - Fachinformationszzentrum Karlsruhe / TIB - Technische InformationsbibliothekDEGerman