Regional climate change and fluctuations as reflected in the atmospheric carbon dioxide concentration

Research output: Chapter in Book/Report/Conference proceedingChapter


This chapter analyzes the 15-year long atmospheric carbon dioxide (CO 2) mixing ratio record measured at Hegyhátsál, Hungary, to reveal the effect of regional climate change and fluctuations. While the long-term trend and the temporal fluctuation of the growth rate faithfully follow the global tendencies, the shorter term variations show special features. The authors present the distorted seasonal cycle caused by the seasonality in the atmospheric vertical mixing and the tendentious change in its shape, which is attributed to the gradual warming and the prolongation of the growing season. The decreasing summer diurnal amplitude and the decreasing seasonal amplitude in the mixing ratio and the higher than average summer CO2 mixing ratio growth rate in the first period of the measurements (1994-2003) with increasing temperature and decreasing precipitation are explained as the consequences of the reduced activity of the biosphere in the influence area of the station and that of the reduced biomass under the increasingly unfavorable environmental conditions. The explanation is supported by the colocated tall tower surface-atmosphere CO2 exchange measurements and by the crop yield statistics of the dominantly agricultural region around the station.

Original languageEnglish
Title of host publicationAtmospheric Greenhouse Gases
Subtitle of host publicationThe Hungarian Perspective
PublisherSpringer Netherlands
Number of pages14
ISBN (Print)9789048199495
Publication statusPublished - Dec 1 2011


  • Biosphere/atmosphere exchange
  • Carbon dioxide
  • Climate fluctuation
  • Diurnal variation
  • Growing season
  • Seasonal trend

ASJC Scopus subject areas

  • Environmental Science(all)
  • Earth and Planetary Sciences(all)

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