4156 KB0 KB197420252025Božnar, MarijaGabrovšek, FranciGrašič, BoštjanKokal, DraganaMlakar, PrimožPerne, Matijaštevilka:2-3letnik:54str. 205-216ISSN:0583-6050DOI:10.3986/ac.v54i2.14931COBISSID_HOST:262635779URN:URN:NBN:SI:doc-ZKUVYM5DenSlovenska akademija znanosti in umetnostiActa carsologicacarbon dioxidecave climatecave monitoringjamska mikroklimakarst (geology)kras (geologija)monitoring jamogljikov dioksidshow cavesturistične jameCO2 and temperature variations during peak tourist season in Lepe jame (Postojna Cave, Slovenia)| Dinamika CO2 in temperature med vrhuncem turistične sezone v Lepih jamah (Postojnska jama, Slovenija)|We present and analyze measurements of CO2 concentration and air temperature taken during the peak tourist season of 2017 in Lepe Jame, a poorly ventilated passage within Postojnska Jama, Slovenia. During the study, the passage was visited by between 5500 and 6500 visitors per day. Both parameters show pronounced diurnal fluctuations, primarily driven by visitor activity. As part of our campaign, we tested and confirmed the effectiveness of enhanced ventilation—achieved by opening the artificial tunnel connecting Postojnska Jama to Črna Jama—in preventing excessively high CO2 concentrations. The measure is, however, questionable, as it affects the microclimate in Črna Jama. Although CO2 concentration and temperature are correlated, notable differences emerge in the shapes of their respective rise and recession curves. Temperature increases more rapidly with the arrival of visitors, while it decreases more slowly after visiting hours compared to CO2. This lag is attributed to thermal storage: heat from visitors is absorbed by the cave walls during the day and gradually released into the cave during the nightV članku obravnavamo meritve koncentracije CO2 in temperature zraka med vrhuncem turistične sezone leta 2017 v Lepih jamah – razmeroma slabo prezračenem rovu Postojnske jame, skozi katerega je dnevno prehajalo med 5500 in 6500 obiskovalcev. Oba parametra kažeta izrazita dnevna nihanja, ki so večinoma posledica prisotnosti obiskovalcev. Analiziramo tudi vpliv dodatnega prezračevanja z odprtjem umetnega tunela, ki povezuje Postojnsko jamo s Črno jamo. Ta ukrep učinkovito preprečuje prekomerno kopičenje CO2 ob dneh, ko bi bile zaradi zunanjih vremenskih razmer in velikega števila obiskovalcev sicer pričakovane visoke koncentracije, a je z vidika vpliva na klimo Črne jame nesprejemljiv. Čeprav sta koncentracija CO2 in temperatura medsebojno povezana, se krivulji njunega naraščanja in upadanja pomembno razlikujeta. Temperatura se ob prihodu obiskovalcev hitro zviša, njen upad po zaključku obiskov pa je počasnejši kot pri CO2. Zakasnitev pripisujemo izmenjavi toplote z jamskimi stenami – toplota, ki jo oddajajo obiskovalci, se čez dan shranjuje v stenah in ponoči prehaja nazaj v jamoTEXTznanstveno časopisjejournalsSlovenian National E-content AggregatorNational and University Library of SloveniaZRC SAZU