Human Activity Recorded in Carbon Isotopic Composition of Atmospheric CO 2 in Gliwice Urban Area and Surroundings (Southern Poland) in the Years 2011–2013
2019; Cambridge University Press; Volume: 62; Issue: 1 Linguagem: Inglês
10.1017/rdc.2019.92
ISSN1945-5755
AutoresNatalia Piotrowska, Anna Pazdur, Sławomira Pawełczyk, Andrzej Rakowski, Barbara Sensuła, Konrad Tudyka,
Tópico(s)Climate variability and models
ResumoABSTRACT In this paper, a record of the 14 C and 13 C isotope content of atmospheric CO 2 for Gliwice is presented for samples collected on a weekly basis in the years 2011–2013. In addition, measurements were performed on the early and late wood from the annual rings of pine trees from five sites located 3–6 km from the atmospheric CO 2 sampling point. The concentration of 14 C in CO 2 samples from the air was much lower relative to the concentration of this isotope in “clean air,” indicating a pronounce Suess effect, with a mean Δ 14 C lower by ca. 60‰ than Jungfraujoch data when the 15% of the highest differences are excluded, which leads to the FFCO 2 estimate of 5.8%. In winter, the main source of fossil CO 2 was fuel combustion, as confirmed by significant correlations with air pollutants. In the vegetation seasons, the Δ 14 C was highly variable due to biogenic influence and more variable winds. The isotopic results were also affected by an additional significant CO 2 source for the Gliwice air, which was a closed mine shaft. The Δ 14 C and δ 13 C in tree rings did not record a strong Suess effect in the years 2008–2013 in woodland areas around Gliwice city.
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