Data for: What actually controls the minute to hour changes in soil carbon dioxide concentrations?

Data on changes in soil carbon dioxide concentrations

Data for: What actually controls the minute to hour changes in soil carbon dioxide concentrations?

Data on changes in soil carbon dioxide concentrations

Corrosion of calcite speleothems in epigenic caves of Moravian Karst (Czech Republic)

The data are part of the article ‘Corrosion of calcite speleothems in epigenic caves of the Moravian Karst (Czech Republic)’ accepted for publication in the journal Environmental Earth Sciences (Springer). The results are based on a comparison of the natural corrosion of calcite speleothem with the artificial corrosion of limestone and calcite standards. A new mechanism of corrosion is presented. Conditions of corrosion are demonstrated on conceptual model of the karst vertical profile.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

Historical ferrous slag induces modern environmental problems in the Moravian Karst (Czech Republic)

Ferrous slag produced by a historic smelter is washed from the heap and transported by a creek through the cave system. There is concern that the slag fills cave spaces, abrades cave walls / calcite speleothems, and contaminates the aquatic environment with heavy metals and other toxic components. The study objectives were to better characterize the slag in its deposition site, map its transport through the cave system, characterize the effect of slag transport, and to judge the risks to both cave and aqueous environments. The study was based on methods of chemical and phase analysis supported laboratory experiments and geochemical modeling. The slag in the heap was dominated by amorphous glass phase (66 to 99 wt%) with mean composition of 49.8±2.8 wt% SiO2, 29.9±1.6 wt% CaO, 13.4±1.2 wt% Al2O3., 2.7±0.3 wt% K2O and 1.2±0.1 wt% MgO. Minerals such as melilite, plagioclase, anorthite, and wollastonite / pseudowollastonite with smaller amounts of quartz, cristobalite, and calcite were detected. Slag trace elements formally enrich the cave environment with Se, As, W, Y, U, Be, Cs, Sc, Cd, Hf, Ba, Th, Cr, Zr, Zn, and V. However, only Zr, V, Co, and As exceed specified limits for soils (US EPA and EU limits). The life of a 1 mm3 volume of slag was estimated to be 27,000 years. The mean residence time of the slag in the cave defined by the flood frequency was 47 years. The main conclusion was that the extent of slag weathering is small and that the slag does not contaminate the cave aqueous environment under given conditions. However, the slag enriched in U / Th can increase radon production as a result of alpha decay. The slag has an abrasive effect on surrounding rocks and disintegrated slag can contaminate calcite speleothems.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

Karst caves, a global exchanger of carbon dioxide

Data from the Sloup-Šošůvka Caves (Moravian Karst)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