Carbon dioxide seasonality in dynamically ventilated caves: the role of advective fluxes
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61989592%3A15310%2F17%3A73581060" target="_blank" >RIV/61989592:15310/17:73581060 - isvavai.cz</a>
Alternative codes found
RIV/00216224:14310/17:00095865
Result on the web
<a href="https://link.springer.com/article/10.1007%2Fs00704-016-1858-y" target="_blank" >https://link.springer.com/article/10.1007%2Fs00704-016-1858-y</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1007/s00704-016-1858-y" target="_blank" >10.1007/s00704-016-1858-y</a>
Alternative languages
Result language
angličtina
Original language name
Carbon dioxide seasonality in dynamically ventilated caves: the role of advective fluxes
Original language description
The seasonality in cave CO2 levels was studied based on (1) a new data set from the dynamically ventilated Comblain-au-Pont Cave (Dinant Karst Basin, Belgium), (2) archive data from Moravian Karst caves, and (3) published data from caves worldwide. A simplified dynamic model was proposed for testing the effect of all conceivable CO2 fluxes on cave CO2 levels. Considering generally accepted fluxes, i.e., the direct diffusive flux from soils/epikarst, the indirect flux derived from dripwater degassing, and the input/output fluxes linked to cave ventilation, gives the cave CO2 level maxima of 1.9 x 10(-2) mol m(-3) (i.e., similar to 440 ppmv), which only slightly exceed external values. This indicates that an additional input CO2 flux is necessary for reaching usual cave CO2 level maxima. The modeling indicates that the additional flux could be a convective advective CO2 flux from soil/epikarst driven by airflow (cave ventilation) and enhanced soil/epikarstic CO2 concentrations. Such flux reaching up to 170 mol s(-1) is capable of providing the cave CO2 level maxima up to 3 x 10(-2) mol m(-3) (70,000 ppmv). This value corresponds to the maxima known from caves worldwide. Based on cave geometry, three types of dynamic caves were distinguished: (1) the caves with the advective CO2 flux from soil/epikarst at downward airflow ventilation mode, (2) the caves with the advective soil/epikarstic flux at upward airflow ventilation mode, and (3) the caves without any soil/epikarstic advective flux. In addition to CO2 seasonality, the model explains both the short-term and seasonal variations in delta C-13 in cave air CO2.
Czech name
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Czech description
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Classification
Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
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OECD FORD branch
10509 - Meteorology and atmospheric sciences
Result continuities
Project
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Continuities
I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace
Others
Publication year
2017
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
Theoretical and Applied Climatology
ISSN
0177-798X
e-ISSN
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Volume of the periodical
129
Issue of the periodical within the volume
3-4
Country of publishing house
AT - AUSTRIA
Number of pages
17
Pages from-to
1355-1372
UT code for WoS article
000406123400048
EID of the result in the Scopus database
2-s2.0-84977103292