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Pregled bibliografske jedinice broj: 646653

Concentration and stable carbon isotopic composition of CO2 in cave air of Postojnska jama, Slovenia


Mandić, Magda; Mihevc, Andrej; Leis, Albrecht; Krajcar Bronić, Ines
Concentration and stable carbon isotopic composition of CO2 in cave air of Postojnska jama, Slovenia // International Journal of Speleology, 42 (2013), 3; 279-289 doi:10.5038/1827-806X.42.3.11 (međunarodna recenzija, članak, znanstveni)


Naslov
Concentration and stable carbon isotopic composition of CO2 in cave air of Postojnska jama, Slovenia

Autori
Mandić, Magda ; Mihevc, Andrej ; Leis, Albrecht ; Krajcar Bronić, Ines

Izvornik
International Journal of Speleology (0392-6672) 42 (2013), 3; 279-289

Vrsta, podvrsta i kategorija rada
Radovi u časopisima, članak, znanstveni

Ključne riječi
Karst; cave; CO2 concentration; 13C of cave-air CO2; Postojnska jama

Sažetak
Partial pressure of CO2 (pCO2) and its isotopic composition (δ13CairCO2) were measured in Postojnska jama, Slovenia, at 10 locations inside the cave and outside the cave during a one-year period. At all interior locations the pCO2 was higher and δ13CairCO2 lower than in the outside atmosphere. Strong seasonal fluctuations in both parameters were observed at locations deeper in the cave, which are isolated from the cave air circulation. By using a binary mixing model of two sources of CO2, one of them being the atmospheric CO2, we show that the excess of CO2 in the cave air has a δ13C value of -23.3 ± 0.7 ‰, in reasonable agreement with the previously measured soil-CO2 δ13C values. The stable isotope data suggest that soil CO2 is brought to the cave by drip water.

Izvorni jezik
Engleski

Znanstvena područja
Fizika, Geologija



POVEZANOST RADA


Projekt / tema
098-0982709-2741 - Prirodni radioizotopi u istraživanju krških ekosustava i datiranju (Nada Horvatinčić, )

Ustanove
Institut "Ruđer Bošković", Zagreb,
Sveučilište u Rijeci - Odjel za fiziku

Časopis indeksira:


  • Current Contents Connect (CCC)
  • Web of Science Core Collection (WoSCC)
    • Science Citation Index Expanded (SCI-EXP)
    • SCI-EXP, SSCI i/ili A&HCI
  • Scopus


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