Problems of Geography, 2020, Vol.3, DOI: https://doi.org/10.35101/PRG-2020.3.6
Stoyan Kyurkchiev

The cave systems have a unique cave climate for each of them. This is due to the structural complexity and individuality of separate karst geosystem. At this stage there is no generalized model of the speleoclimate, but there are some regularities in the distribution, dynamics and seasonality of the speleoclimatic parameters: small annual temperature amplitude, high humidity, seasonal change in the direction of air circulation, specific gas composition. The dynamics and circulation modes of the speleoatmosphere are determined by the morphology of the cave system and climatic conditions (the difference in air density caused by differences in temperature and pressure on the surface and in the cave, system determine the changes of the ventilation regimes of the cave atmosphere). The seasonal change in the direction and intensity of the ventilation regimes in the karst caves is a leading factor determining the gas composition of the speleoatmosphere during the different seasons. The average annual temperatures in the explored caves fluctuate in a wide rage – from 6,6 °C for Ivanova Voda cave, to 11,5 °C for Stara cave. In the caves where rivers flow, it has been established specific temperature regimes to each of them and the relative humidity of the cave air. Based on the measured temperatures in the investigated caves, the microclimatic zones in them has been determined. There are three zones in the caves under study, and in some of them are located and subzones formed by the influence of the morphology of the cave. The results of the microclimatic monitoring in the investigated caves are used to clarify the influence of their ventilation regimes on the volumetric activity of the radon. The purpose of this study is to investigate the microclimate of selected model caves with different morphology and temperature regimes in the Western Rhodopes.

karst, karst caves, ventilation, speleoatmosphere, speloclimate, monitoring

The research in the caves in the Western Rhodopes is conducted with the support of the Experimental Laboratory of Carstology of NIGGG-BAS, the Bulgarian Federation 133 in Speleology and Speleo Club “Puldin”, Plovdiv. The author thanks all colleagues and friends for their empathy and help in this research.
The monitoring studies conducted in the Rhodope caves are included in the program of the research project “Modern impacts of global changes on karst evolution (based on integrated monitoring in model karst geosystems in Bulgaria)”, funded by NSF (Contract DN 14/10, 20.12. 2017).

Author information:
Author: Stoyan Kyurkchiev
E-mail: jazon@abv.bg
Affiliation: National Institute of Geophysics, Geodesy and Geography – BAS, department of Geography, str. Acad. G. Bonchev, bl. 3, Sofia 1113, Bulgaria

How to cite:
Kyurkchiev, S. (2020). Микроклимат в моделни карстови пещери в Западните Родопи. Problems of Geography, 2020, Vol.3, p. 118-135. https://doi.org/10.35101/PRG-2020.3.6