An unexpected pattern of distinct weekly periodicities in climatological variables in Germany

Details An unexpected pattern of distinct weekly periodicities in climatological variables in Germany An unexpected pattern of distinct weekly periodicities in climatological variables in Germany

Feb 2007

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007georl..3403819b&link_type=abstract

Geophysical Research Letters, Volume 34, Issue 3, CiteID L03819

Mathematics

Logic

35

Atmospheric Composition And Structure: Pollution: Urban And Regional (0305, 0478, 4251), Atmospheric Composition And Structure: Radiation: Transmission And Scattering, Atmospheric Processes: Climate Change And Variability (1616, 1635, 3309, 4215, 4513), Atmospheric Processes: Climatology (1616, 1620, 3305, 4215, 8408), Atmospheric Processes: Clouds And Aerosols

Scientific paper

Statistical analyses of data from 12 German meteorological stations meeting WMO standards in the period 1991-2005 are presented. These stations represent different local climate conditions in terms of both meteorology and pollution situation. For the average over data of all stations, we identified significant weekly periodicities in many variables such as temperature, daily temperature range, sunshine duration, cloud amount, precipitation, and precipitation frequency. Not only data of stations situated in congested urban areas, but also data of remote stations as e.g. on Mount Zugspitze 2960 m above sea level in the Alps showed significant in-phase weekly cycles. These weekly periodicities cannot be explained completely by local pollution effects or local heat emissions. We tend towards the hypothesis that the anthropogenic weekly emission cycle and the subsequent aerosol cycle interact with the atmospheric dynamics on a larger scale which leads to a forcing of a naturally existing 7-day period among the spectrum of atmospheric periods.

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