4 research outputs found
Data for: Quaternary environmental evolution in the South Carpathians reconstructed from glaciokarst geomorphology and sedimentary archives
This dataset contains orientation and morphometry data of structural features and marble karst landforms from an alpine setting in the South Carpathians, Romania. Orientation data was processed using ArcGIS software package and Grapher for structural analysis of joints, faults, and cave passages. Morphometric data of alpine solution and collapse dolines was retrieved from the high-resolution digital surface model of the Museteica glacial cirque
Data for: Quaternary environmental evolution in the South Carpathians reconstructed from glaciokarst geomorphology and sedimentary archives
This dataset contains orientation and morphometry data of structural features and marble karst landforms from an alpine setting in the South Carpathians, Romania. Orientation data was processed using ArcGIS software package and Grapher for structural analysis of joints, faults, and cave passages. Morphometric data of alpine solution and collapse dolines was retrieved from the high-resolution digital surface model of the Museteica glacial cirque.THIS DATASET IS ARCHIVED AT DANS/EASY, BUT NOT ACCESSIBLE HERE. TO VIEW A LIST OF FILES AND ACCESS THE FILES IN THIS DATASET CLICK ON THE DOI-LINK ABOV
Transfer of environmental signals from the surface to the underground at Ascunsă Cave, Romania
We present here the results of a 4-year environmental monitoring program at
Ascunsă Cave (southwestern Romania) designed to help us understand how
climate information is transferred through the karst system and archived by
speleothems. The air temperature inside the cave is around 7 °C,
with slight differences between the upper and lower parts of the main
passage. CO2 concentrations in cave air have a seasonal signal, with
summer minima and winter maxima. These might indicate the existence of an
organic matter reservoir deep within the epikarst that continues to decompose
over the winter, and CO2 concentrations are possibly modulated by seasonal differences in cave
ventilation. The maximum values of CO2 show a rise after the summer of
2014, from around 2000 to about 3500 ppm, following a rise in surface
temperature. Using two newly designed types of water–air equilibrators, we
were able to determine the concentration of CO2 dissolved in drip water
by measuring its concentration in the equilibrator headspace and then using
Henry's law to calculate its concentration in water. This method opens the
possibility of continuous data logging using infrared technology, without the
need for costly and less reliable chemical determinations. The local meteoric
water line (δ2H = 7.7 δ18O + 10.1), constructed
using monthly aggregated rainfall samples, is similar to the global one,
revealing the Atlantic as the strongly dominant vapor source. The
deuterium excess values, as high as 17 ‰, indicate that
precipitation has an important evaporative component, possibly given by
moisture recycling over the European continent. The variability of stable
isotopes in drip water is similar at all points inside the cave, suggesting
that the monitored drip sites are draining a homogenous reservoir. Drip
rates, as well as stable isotopes, indicate that the transfer time of water
from the surface is on the order of a few days