The "breathing spots" in karst areas-the sites of advective exchange of gases between soils and adjacent underground cavities

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F62156489%3A43210%2F20%3A43918091" target="_blank" >RIV/62156489:43210/20:43918091 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/00216224:14310/20:00116654 RIV/61989592:15310/20:73601746

Výsledek na webu

<a href="https://doi.org/10.1007/s00704-020-03280-7" target="_blank" >https://doi.org/10.1007/s00704-020-03280-7</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1007/s00704-020-03280-7" target="_blank" >10.1007/s00704-020-03280-7</a>

Jazyk výsledku

angličtina

Název v původním jazyce

The "breathing spots" in karst areas-the sites of advective exchange of gases between soils and adjacent underground cavities

Popis výsledku v původním jazyce

Microclimatic processes were studied in the soil of the well-defined &quot;breathing spot&quot; named P &amp; x16f;lhodina (BSP) in the Hranice Karst (Czech Republic). The results have indicated that air is exchanged between the external atmosphere and a supposed underground cavity under air-buoyancy control. Upward airflow ventilation mode (UAF mode) and downward airflow ventilation mode (DAF mode) were distinguished. The virtual temperature of switching between both modes was about 16.5 degrees C. At the UAF mode, the underground air is rising from the cavity through the BSP, warms soil, and carries out the underground CO2. At the DAF mode, the external air is sucked into the cavity through the BSP soil, promoting the advective flux of the soil-respired CO(2)deeper into the cavity. Whereas the warming of the soil is a dominant process in the UAF mode, the CO(2)advective flux into the cavity is the main process in the DAF mode. The simplified mathematical model was derived as a function of the external air temperature and the soil air temperature to simulate the time evolution of CO(2)concentration in the BSP. Despite simplifying assumptions, this model showed a good agreement with the collected data. The advective CO(2)flux from a breathing spot soil may significantly contribute to the total CO(2)flux into the adjacent underground cavity. Its total values may reach 4 x 10(-3) mol s(-1)or even more, based on the actual CO(2)concentration, the exchanged airflow magnitude (both controlled by external temperature), and the breathing spot area. This conclusion is important for karsologists studying the cave CO(2)budget, CO(2)sources, and the mechanisms of CO(2)transport into caves.

Název v anglickém jazyce

The "breathing spots" in karst areas-the sites of advective exchange of gases between soils and adjacent underground cavities

Popis výsledku anglicky

Microclimatic processes were studied in the soil of the well-defined &quot;breathing spot&quot; named P &amp; x16f;lhodina (BSP) in the Hranice Karst (Czech Republic). The results have indicated that air is exchanged between the external atmosphere and a supposed underground cavity under air-buoyancy control. Upward airflow ventilation mode (UAF mode) and downward airflow ventilation mode (DAF mode) were distinguished. The virtual temperature of switching between both modes was about 16.5 degrees C. At the UAF mode, the underground air is rising from the cavity through the BSP, warms soil, and carries out the underground CO2. At the DAF mode, the external air is sucked into the cavity through the BSP soil, promoting the advective flux of the soil-respired CO(2)deeper into the cavity. Whereas the warming of the soil is a dominant process in the UAF mode, the CO(2)advective flux into the cavity is the main process in the DAF mode. The simplified mathematical model was derived as a function of the external air temperature and the soil air temperature to simulate the time evolution of CO(2)concentration in the BSP. Despite simplifying assumptions, this model showed a good agreement with the collected data. The advective CO(2)flux from a breathing spot soil may significantly contribute to the total CO(2)flux into the adjacent underground cavity. Its total values may reach 4 x 10(-3) mol s(-1)or even more, based on the actual CO(2)concentration, the exchanged airflow magnitude (both controlled by external temperature), and the breathing spot area. This conclusion is important for karsologists studying the cave CO(2)budget, CO(2)sources, and the mechanisms of CO(2)transport into caves.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10509 - Meteorology and atmospheric sciences

Projekt

—

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2020

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Theoretical and Applied Climatology

ISSN

0177-798X

e-ISSN

—

Svazek periodika

142

Číslo periodika v rámci svazku

1-2

Stát vydavatele periodika

AT - Rakouská republika

Počet stran výsledku

17

Strana od-do

85-101

Kód UT WoS článku

000543289000001

EID výsledku v databázi Scopus

2-s2.0-85087055916