Measurements and calculations of seasonal evaporation rate from bare sandstone surfaces: Implications for rock weathering

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F67985891%3A_____%2F20%3A00533114" target="_blank" >RIV/67985891:_____/20:00533114 - isvavai.cz</a>

Alternative codes found

RIV/00216208:11310/20:10420341

Result on the web

<a href="https://onlinelibrary.wiley.com/doi/epdf/10.1002/esp.4943" target="_blank" >https://onlinelibrary.wiley.com/doi/epdf/10.1002/esp.4943</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1002/esp.4943" target="_blank" >10.1002/esp.4943</a>

Result language

angličtina

Original language name

Measurements and calculations of seasonal evaporation rate from bare sandstone surfaces: Implications for rock weathering

Original language description

Evaporation from porous rock plays an important role in weathering processes. In the case of salt weathering, the evaporation rate controls supersaturation of salt solutions within pores and the amount of precipitated aggressive salts, therefore weathering occurs mostly in places with intense evaporation. Evaporation also strongly affects frost, hydric and biogenic weathering, as these are influenced by water content and its temporal changes. Despite its importance, evaporation from porous rocks has seen little scientific focus. We present a study on evaporation from bare sandstone, one of the most common rocks affected by weathering. A new method that measures the evaporation rate from the surfaces of sandstone samples under field microclimate was developed and tested. Also, a simple calculation of 1D evaporation rate from bare sandstone surfaces based on Fick's law of diffusion is presented. The measurement was performed using sandstone cores (with a set depth of the vaporization plane) in a humid continental climate and measured on a roughly monthly interval for about 1 year. For the calculations, a laboratory-measured water-vapour diffusion coefficient of the sandstone,in-situseasonally measured vaporization plane depth, and values of air humidity and temperature were used. The sensitivity analyses showed that the most important factor controlling the evaporation rate was the vaporization plane depth, while seasonal and spatial changes of air humidity and temperature were of lesser importance. The calculated evaporation rate reasonably follows measured values. For its simplicity and the small number of parameters required, the proposed method has the potential to improve knowledge of weathering and living conditions of endolithic and epilithic organisms. Further research should focus on factors affecting the evaporation rate (wind, hygroscopicity, hydrophobicity, etc.) to improve the accuracy of the calculations, as well as to test the applicability of the method for other lithologies and climates.

Czech name

—

Czech description

—

Type

J_imp - Article in a specialist periodical, which is included in the Web of Science database

CEP classification

—

OECD FORD branch

10505 - Geology

Project

<a href="/en/project/GA19-14082S" target="_blank" >GA19-14082S: Stress- and hydraulic field-controlled weathering and erosion of granular rocks</a><br>

Continuities

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year

2020

Confidentiality

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

Name of the periodical

Earth Surface Processes and Landforms

ISSN

0197-9337

e-ISSN

—

Volume of the periodical

45

Issue of the periodical within the volume

12

Country of publishing house

US - UNITED STATES

Number of pages

17

Pages from-to

2965-2981

UT code for WoS article

000555820800001

EID of the result in the Scopus database

2-s2.0-85088988972