Spatial and temporal variations in carbon dioxide (CO2) concentrations in selected soils of the Moravian Karst (Czech Republic)

Blecha, Martin; Faimon, Jiřı́

doi:10.1007/s13146-014-0220-7

Cited by 15 publications

(10 citation statements)

References 33 publications

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“…-5 m 2 s -1 ) were applied, in order to cover nonhomogeneous structure of cave overburden. The CO 2 concentrations directly measured in upper parts of the soil profiles in the Moravian Karst range from 1,000 to 10,000 ppmv (4.3 × 10 -2 to 0.43 mol m -3 ) (Faimon & Ličbinská, 2010;Faimon et al, 2012b;Blecha & Faimon, 2014). A narrower range is reported for cave CO 2 concentrations.…”

Section: Discussionmentioning

confidence: 99%

The impact of door opening on CO2 levels: A case study from the Balcarka Cave (Moravian Karst, Czech Republic)

Lang¹,

Faimon²,

Kejíková³

2017

IJS

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Abstract:The impact of door opening on cave carbon dioxide (CO 2 ) levels was studied in the Entrance Chamber and the Gallery Chamber of the Balcarka Cave (Moravian Karst, Czech Republic). The effect of door opening differed with cave ventilation modes. Under upward airflow mode, the cave door opening led to the increase of output advective CO 2 fluxes from the cave and to the decrease of CO 2 levels. This effect was evident especially in the Entrance Chamber near the cave entrance and then suppressed in the Gallery Chamber situated deeper in the cave. Under the downward airflow mode, the cave door opening changed airflow paths and main CO 2 sources/fluxes. This resulted in the increase of CO 2 level in the Entrance Chamber while the levels in the Gallery Chamber decrease. Modeling indicates that the increase could be result of input advective CO 2 fluxes from epikarst (up to 5.9 × 10 -2 mol s -1 ). To reduce the impact on cave microclimate, a careful control of the visiting regime without overlapping of individual doors' openings is recommended. cave chamber, CO 2 levels, cave ventilation, door opening, advective CO 2 flux

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Section: Discussionmentioning

confidence: 99%

The impact of door opening on CO2 levels: A case study from the Balcarka Cave (Moravian Karst, Czech Republic)

Lang¹,

Faimon²,

Kejíková³

2017

IJS

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“…Other studies indicate similarly high CO 2 concentrations (3-10 vol%) (Peyraube et al 2012(Peyraube et al , 2013Milanolo and Gabrovšek 2015). This is contradictory to low concentrations of soil CO 2 with seasonal character (Faimon and Ličbinská 2010;SanchezCañete et al 2011;Plestenjak et al 2012;Blecha and Faimon 2014a), although supported by some measurements in vadose zone and caves (Otava 1995;Benavente et al 2010). Independence of P CO 2 ðHÞ on surface conditions (temperature variation, rainfall, amount of water in perched collectors etc.)…”

Section: Hypothetical P Co 2 In Epikarstmentioning

confidence: 96%

“…The study was conducted in the Punkva Caves (Moravian Karst, Czech Republic, see, e.g., Absolon 1970;Blecha and Faimon 2014a). Moravian Karst is the largest karst region in the Czech Republic with surface area of 92 km 2 .…”

Section: Site Of Studymentioning

confidence: 99%

“…It is believed that most of the karst CO 2 is produced by biodegradation of organic matter or root respiration in soil/epikarst (Kuzyakov 2006). The CO 2 concentrations in karst soils usually reach up to 1 vol% (P CO 2 * 10 -2 ) with strong seasonal fluctuations leading to highest values in summer and lowest in winter (Faimon and Ličbinská 2010;Sanchez-Cañete et al 2011;Plestenjak et al 2012;Blecha and Faimon 2014a). Part of the soil CO 2 is dissolved in percolating water and transported downwards into lower parts of karst profile.…”

Section: Introductionmentioning

confidence: 99%

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Variations of carbon dioxide in the air and dripwaters of Punkva Caves (Moravian Karst, Czech Republic)

Pracný

Faimon

Kabelka

et al. 2015

Carbonates Evaporites

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Carbon dioxide (CO 2 ) was studied in Punkva Caves in the Moravian Karst (Czech Republic) during a one-year period from February 2012 to March 2013. Partial pressures of the CO 2 corresponding to aqueous carbonates, P CO 2 ðWÞ (10 -2.91 -10 -2.35 , i.e., 0.12-0.45 vol%), and those participating in the initial dripwater formation, P CO 2 ðHÞ (10 -1.77 -10 -1.49 , i.e., 1.7-3.2 vol%), were calculated from dripwater hydrogeochemistry, and compared with the partial pressure in cave air, P CO 2 ðairÞ (10 -3.31 -10 -2.49 , i.e., 0.06-0.32 vol%). Both the P CO 2 ðairÞ and P CO 2 ðWÞ showed clear seasonal variations with maxima in summer and minima in winter. In contrast, the P CO 2 ðHÞ was very stable without any significant seasonality, which could indicate its independence on surface conditions. As an exception, one anomalous drip with significantly lower and varying P CO 2 ðWÞ , P CO 2 ðHÞ , and SI calcite was recognized as a result of prior calcite precipitation. Evolution of dripwater during CO 2 degassing and calcite precipitation is demonstrated in detail in a geochemical model. The study presents new data indicating that the CO 2 source might be deployed in deeper parts of karst profile (epikarst) in addition to karst soils.

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“…() suggest that precipitation has the greatest influence on karst systems only within the first few metres of the epikarst where CO 2 concentrations are more abundant and dissolution generates common surface morphologies, such as dolines, poljes, and cenotes (Veni et al ., ). Capturing these geochemical changes requires both high‐resolution and long‐term data collection, as several studies indicate that epikarst heterogeneity and residence time can greatly influence the point at which dissolution tends to cease and measuring the flux of CO 2 in this part of the system through proxy geochemical data has proven challenging (Hess and White, ; Baldini et al ., ; Blecha and Faimon, , ).…”

Section: Introductionmentioning

confidence: 99%

Seasonal δ¹³C_DIC sourcing and geochemical flux in telogenetic epikarst of south‐central Kentucky

Jackson

Polk

2020

Earth Surf Processes Landf

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Telogenetic epikarst carbon sourcing and transport processes and their associated hydrogeochemical responses are complex and dynamic. Carbon dioxide (CO2) transport rates in the epikarst zone are often driven by hydrogeochemical responses, which influence carbonate dissolution and conduit formation. This study examines the influence of land use on carbon sourcing and carbonate dissolution kinetics through a comparative analysis of separate, but similar, epikarst systems in south‐central Kentucky. The use of high‐resolution hydrogeochemical data from multiple data loggers and isotope analysis from collected water samples reflects the processes within these epikarst aquifers, which are estimated to contribute significantly to bedrock dissolution. Results indicate that, in an agricultural setting, long‐term variability and dissolution is governed by seasonal production of CO2. In a more urbanized, shallower epikarst system, land cover may affect CO2 transport between the soil and underlying bedrock. This concentration of CO2 potentially contributes to ongoing dissolution and conduit development, irrespective of seasonality. The observed responses in telogenetic epikarst systems seem to be more similar to eogenetic settings, which is suggested to be driven by CO2 transport occurring independent of high matrix porosity. The results of this study indicate site‐specific responses with respect to both geochemical and δ13CDIC changes on a seasonal scale, despite regional geologic similarities. The results indicate that further comparative analyses between rural and urban landscapes in other karst settings is needed to delineate the impact of land use and seasonality on dissolution and carbon sourcing during karst formation processes. © 2019 John Wiley & Sons, Ltd.

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Spatial and temporal variations in carbon dioxide (CO2) concentrations in selected soils of the Moravian Karst (Czech Republic)

Cited by 15 publications

References 33 publications

The impact of door opening on CO2 levels: A case study from the Balcarka Cave (Moravian Karst, Czech Republic)

The impact of door opening on CO2 levels: A case study from the Balcarka Cave (Moravian Karst, Czech Republic)

Variations of carbon dioxide in the air and dripwaters of Punkva Caves (Moravian Karst, Czech Republic)

Seasonal δ¹³C_DIC sourcing and geochemical flux in telogenetic epikarst of south‐central Kentucky

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Spatial and temporal variations in carbon dioxide (CO2) concentrations in selected soils of the Moravian Karst (Czech Republic)

Cited by 15 publications

References 33 publications

The impact of door opening on CO2 levels: A case study from the Balcarka Cave (Moravian Karst, Czech Republic)

The impact of door opening on CO2 levels: A case study from the Balcarka Cave (Moravian Karst, Czech Republic)

Variations of carbon dioxide in the air and dripwaters of Punkva Caves (Moravian Karst, Czech Republic)

Seasonal δ13CDIC sourcing and geochemical flux in telogenetic epikarst of south‐central Kentucky

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Seasonal δ¹³C_DIC sourcing and geochemical flux in telogenetic epikarst of south‐central Kentucky