20.500.12556/DiRROS-25119 CO₂ 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 night. V 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 jamo. karst cave climate show cave carbon dioxide cave monitoring kras jamska mikroklima turistična jama ogljikov dioksid monitoring jam true false true Angleški jezik Slovenski jezik Imetniki avtorskih pravic na prispevkih so avtorji Članek v reviji 2026-01-10 14:33:56 2026-01-10 14:33:57 2026-02-15 18:44:51 0000-00-00 00:00:00 2025 0 0 str. 205-216 št. 2-3 letn. 54 2025 0000-00-00 Zaloznikova Objavljeno NiDoloceno 0000-00-00 0000-00-00 2025-12-16 551.44:551.584(497.4) 0583-6050 10.3986/ac.v54i2.14931 262635779 https://ojs.zrc-sazu.si/carsologica/article/view/14931 0 b88c2c5a-ee2a-11f0-94a7-001a4af901a5 https://dirros.openscience.si/Dokument.php?lang=slv&id=37829 Perne.pdf Perne.pdf 1 080F499DC027629AE7BCF1F1238DE437 0758d34617359fc51e38ecae00eb97f5ccbc191bf44b7d32271411296206cb2e c36ab14b-ee2a-11f0-94a7-001a4af901a5 https://dirros.openscience.si/Dokument.php?lang=slv&id=37830 Znanstvenoraziskovalni center Slovenske akademije znanosti in umetnosti Acta carsologica = Krasoslovni zbornik 0 0 0