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Physical Sciences and Mathematics Commons™
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- Carbon dioxide (4)
- Cave (4)
- Chimney effect (4)
- Karst (3)
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- Book review (2)
- Cave environments (2)
- Cave fauna (2)
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- Climate (2)
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- Speleothem (2)
- Ventilation (2)
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- 13C of cave-air CO2 (1)
- 3D models (1)
- Air exchange time (1)
- Air flow (1)
- Airflow (1)
- Anthropogenic and natural CO2; cave ventilation; flux; dynamic model; temperature difference (1)
- Arachnocampa luminosa (1)
- Arthropoda (1)
- Assisted elimination of cave (1)
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Articles 31 - 33 of 33
Full-Text Articles in Physical Sciences and Mathematics
Measurement Of Luminescent Banding In Speleothems: Some Techniques And Limitations, Bryan E. Crowell, William B. White
Measurement Of Luminescent Banding In Speleothems: Some Techniques And Limitations, Bryan E. Crowell, William B. White
International Journal of Speleology
Speleothems, especially flowstone and cylindrical stalagmites, exhibit phosphorescence which is often banded on the scale of a few tens of micrometers. The luminescence bands are paleoclimatic records with a very high temporal resolution. A technique has been developed using a laser source and a high resolution Raman spectrometer with microscope and computer-controlled translation stage for both luminescence profiles and luminescence spectroscopy. Luminescence intensity could be measured as a function of traverse distance with a spatial resolution of 2 – 3 μm. Potential sources of error include loss of intensity due to radiation damage by the laser beam, irregularities, cracks, and …
Cora – A Dedicated Device For Carbon Dioxide Monitoring In Cave Environments, Marc Luetscher, Felix Ziegler
Cora – A Dedicated Device For Carbon Dioxide Monitoring In Cave Environments, Marc Luetscher, Felix Ziegler
International Journal of Speleology
High resolution time-series of cave CO2 fluctuations are increasingly demanded to quantify calcite precipitation processes. CORA, an energy-efficient NDIR-device, has been specifically developed for the long-term monitoring of carbon dioxide in remote cave environments. To allow comparison between different cave sites, changes in air pressure and temperature are compensated for using dedicated probes. Laboratory experiments demonstrate that CORA’s precision is adapted to the analysis of spatially and temporally variable CO2 regimes and therefore suitable for a large number of applications. Data obtained with 12 independently calibrated instruments are reproducible within 3% (1σ). The two-point calibration function is validated …
Spatially Dense Drip Hydrological Monitoring And Infiltration Behaviour At The Wellington Caves, South East Australia, Catherine N. Jex, Gregoire Mariethoz, Andy Baker, Peter Graham, Martin S. Andersen, Ian Acworth, Nerilee Edwards, Cecilia Azcurra
Spatially Dense Drip Hydrological Monitoring And Infiltration Behaviour At The Wellington Caves, South East Australia, Catherine N. Jex, Gregoire Mariethoz, Andy Baker, Peter Graham, Martin S. Andersen, Ian Acworth, Nerilee Edwards, Cecilia Azcurra
International Journal of Speleology
Despite the fact that karst regions are recognised as significant groundwater resources, the nature of groundwater flow paths in the unsaturated zone of such fractured rock is at present poorly understood. Many traditional methods for constraining groundwater flow regimes in karst aquifers are focussed on the faster drainage components and are unable to inform on the smaller fracture or matrix-flow components of the system. Caves however, offer a natural inception point to observe both the long term storage and the preferential movement of water through the unsaturated zone of such fractured carbonate rock by monitoring of drip rates of stalactites, …