Call for communications :
Ventilation represents a major control on heat an mass transfers in caves. Climatic conditions of these sites whose stability is relative (temperature, humidity) make them very sensitive to the slightest variations in these parameters.
It is therefore particularly important to measure these climatic parameters with precision over the long term, in order to be able to understand and predict the climatic evolution of underground environments. Recent instrumental developments provide a mean for quantifying even minor changes in the cave climatology on daily to decadale time-scales.
These underground environments communicate with the outside via natural entrances (convection) and epikarst (conduction). They are part of an ecosystem composed of the cavity and the surrounding massif. Thus, the air flows, combined with multiple water inlets, act on the phenomena of alteration of the walls. They are the site of bio-geochemical and physico-chemical cycles, which particularly interests cave conservation issues.
Understanding the spatial and temporal climatic evolution of the caves is fundamental for paleoenvironmental reconstructions from cave sediments, the conservation of archaeological paintings and / or biological studies.
This session welcomes any contribution related to the dynamics of air circulation in an underground environment, temperature and humidity monitoring, gas concentrations (e.g. oxygen, noble gases), CO2 exchanges, impact of the climatology of the caves on the alteration of the walls and on the conservation of the decorated caves.
Key-words : air flow, temperature, humidity, CO2, O2, 222Rn, CH4, degassing, climate change, long term recording