Trends and temporal variations of major greenhouse gases at a rural site in Central Europe

L. Haszpra, Z. Barcza, D. Hidy, I. Szilágyi, E. Dlugokencky, P. Tans

Research output: Contribution to journalArticle

45 Citations (Scopus)

Abstract

In this study the trends and temporal variations of four major greenhouse gases (CO2, CH4, N2O, SF6) measured at Hegyhátsál, Hungary, are analyzed. The long term trends observed closely follow the global tendencies. The relatively small positive offset can be attributed to the European anthropogenic sources. The seasonal cycles are basically governed by that in the atmospheric mixing, however, in the case of CO2 and N2O it is also modulated by the temporal variation in the biological activity. A secondary maximum in SF6 mixing ratio in summer may indicate the additional contribution of the seasonally changing circulation pattern. The daily cycles are dominated by the diurnal variation in the vertical mixing of the atmosphere. However, in the case of CO2 the diurnal cycle in the biospheric uptake/release is the governing process, especially in the growing season. The lack of diurnal cycle in the mixing ratio of the exclusively anthropogenic SF6 indicates that there is no notable anthropogenic activity in the influence area of the station, which also means that Hegyhátsál can be considered to be a rural monitoring site as free from direct anthropogenic pollution as it is possible in Central Europe. It is demonstrated that the diurnal covariance between the mixing ratios and the vertical mixing at a mid-continental, low elevation site has to be taken into account, and properly handled, in the dispersion models, otherwise the results may be distorted. The collocated measurement of greenhouse gases of different origin could potentially help modelers to improve the boundary layer representation and horizontal diffusion simulation in the three dimensional atmospheric transport models.

Original languageEnglish
Pages (from-to)8707-8716
Number of pages10
JournalAtmospheric Environment
Volume42
Issue number38
DOIs
Publication statusPublished - Dec 2008

Fingerprint

Greenhouse gases
mixing ratio
greenhouse gas
temporal variation
vertical mixing
atmospheric transport
anthropogenic source
diurnal variation
Biospherics
human activity
growing season
boundary layer
pollution
atmosphere
summer
monitoring
Bioactivity
simulation
trend
Europe

Keywords

  • Carbon dioxide
  • Methane
  • Nitrous oxide
  • Sulfur hexafluoride
  • Temporal variation

ASJC Scopus subject areas

  • Atmospheric Science
  • Environmental Science(all)

Cite this

Trends and temporal variations of major greenhouse gases at a rural site in Central Europe. / Haszpra, L.; Barcza, Z.; Hidy, D.; Szilágyi, I.; Dlugokencky, E.; Tans, P.

In: Atmospheric Environment, Vol. 42, No. 38, 12.2008, p. 8707-8716.

Research output: Contribution to journalArticle

Haszpra, L. ; Barcza, Z. ; Hidy, D. ; Szilágyi, I. ; Dlugokencky, E. ; Tans, P. / Trends and temporal variations of major greenhouse gases at a rural site in Central Europe. In: Atmospheric Environment. 2008 ; Vol. 42, No. 38. pp. 8707-8716.
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