Naslov
Inter-comparison of karst denudation measurement methods (KADEME)

Autori
Krklec, Kristina ; Domínguez-Villar, David ; Lojen, Sonja ; Bensa, Aleksandra ; Braucher, Régis ; Lozić, Sanja ; Andačić, Natalija ; Perica, Dražen

Vrsta, podvrsta i kategorija rada
Sažeci sa skupova, sažetak, znanstveni

Izvornik
20th Congress of the International Union for Quaternary Research (INQUA) / INQUUA, 2019 - Dublin : International Union for Quaternary Research (INQUA), 2019, 2818-2818

Skup
20th Congress of the International Union for Quaternary Research: Life on the Edge (INQUA)

Mjesto i datum
Dublin, Irska, 25.07.2019. - 31.07.2019

Vrsta sudjelovanja
Poster

Vrsta recenzije
Međunarodna recenzija

Ključne riječi
rock weathering ; denudation ; karst ; KADEME

Sažetak
Denudation of Earth surface as a result of rock weathering is the fundamental process governing the landscape development. Weathering of rocks occurs by physical, chemical and biological processes. Ultimately, these processes transform rocks, and provide the material that forms soils. In karst regions, dissolution of carbonate rocks is a dominant process controlling denudation. In order to quantify weathering and/or denudation rate of a certain carbonate area several different methodological approaches can be used. The most used methods are: [1] the exposure of rock tablets to the natural environment, [2] the use of micro-erosion meters on rock surfaces, [3] measuring the concentration of cosmogenic radionuclides on exposed rocks, [4] measuring water hydrochemistry to infer amount of carbonates being dissolved and [5] quantifying the differential erosion on bare-rock surfaces of known age. Every method has pros and cons and there is no consensus on which method provides the more reliable denudation rates. Not all methods quantify denudation over the same timescale and in all cases there are assumptions between acquired data (measurements) and the calculated denudation rates (interpretations). Since weathering is a slow geological process, the accuracy of denudation rate measurements is difficult to validate. Significant differences among methods have been reported by researchers that have used more than one method at the same location. Additinally, comparison of denudation results at regional scale suggests that different methods may have results differences exceeding one order of magnitude. Although local factors can be important contributors to explain the scatter of reported denudation rates, the different methods never have been calibrated together using the same boundary conditions at one single location. As a consequence, at the moment there is no evaluation on the accuracy of available methods, and it is uncertain if any particular method provides results significantly biased compared to other methods. Therefore, the aim of this study is to apply all possible methods that could be studied in a single location to evaluate if their results replicate within their uncertainties. Two study sites in Mediterranean climate region with different soil properties have been selected: Krnić (Croatia) and Ramacastañas (Spain). The different context will allow evaluating if the conclusions are extrapolated to different scenarios. The inter-comparison of denudation measuring methods will allow for the first time the unequivocal identification of strengths and flaws of the different methods. This is an important study to know the accuracy of available methods for the study of denudation and its important implications for the study of the Quaternary. Acknowledgements: This research is a part of the research project “Inter-comparison of karst denudation measurement methods” (KADEME) (IP-2018-01-7080) financed by Croatian Science Foundation.

Izvorni jezik
Engleski

Znanstvena područja
Geologija, Biotehnologija

POVEZANOST RADA