Climate change increasing calcium and magnesium leaching from granitic alpine catchments

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F60077344%3A_____%2F17%3A00479732" target="_blank" >RIV/60077344:_____/17:00479732 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/00216208:11310/17:10336670

Výsledek na webu

<a href="http://dx.doi.org/10.1021/acs.est.6b03575" target="_blank" >http://dx.doi.org/10.1021/acs.est.6b03575</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1021/acs.est.6b03575" target="_blank" >10.1021/acs.est.6b03575</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Climate change increasing calcium and magnesium leaching from granitic alpine catchments

Popis výsledku v původním jazyce

Climate change can reverse trends of decreasing calcium and magnesium [Ca + Mg] leaching to surface waters in granitic alpine regions recovering from acidification. Despite decreasing concentrations of strong acid anions (-1.4 mu eq L-1 yr(-1)) during 2004-2016 in nonacidic alpine lakes in the Tatra Mountains (Central Europe), the average [Ca + Mg] concentrations increased (2.5 mu eq L-1 yr(-1)), together with elevated terrestrial export of bicarbonate (HCO3-, 3.6 mu eq L-1 yr(-1)). The percent increase in [Ca + Mg] concentrations in nonacidic lakes (0.3-3.2% yr(-1)) was significantly and positively correlated with scree proportion in the catchment area and negatively correlated with the extent of soil cover. Leaching experiments with freshly crushed granodiorite, the dominant bedrock,showed that accessory calcite and (to a lesser extent) apatite were important sources of Ca. We hypothesize that elevated terrestrial export of [Ca + Mg] :and HCO3- resulted from increased weathering caused by accelerated physical erosion of rocks due to elevated climate-related mechanical forces (an increasing frequency of days with high precipitation amounts and air temperatures fluctuating around 0 degrees C) during the last 2-3 decades. These climatic effects on water chemistry are especially strong in catchments where fragmented rocks are more exposed to weathering, and their position is less stable than in soil.

Název v anglickém jazyce

Climate change increasing calcium and magnesium leaching from granitic alpine catchments

Popis výsledku anglicky

Climate change can reverse trends of decreasing calcium and magnesium [Ca + Mg] leaching to surface waters in granitic alpine regions recovering from acidification. Despite decreasing concentrations of strong acid anions (-1.4 mu eq L-1 yr(-1)) during 2004-2016 in nonacidic alpine lakes in the Tatra Mountains (Central Europe), the average [Ca + Mg] concentrations increased (2.5 mu eq L-1 yr(-1)), together with elevated terrestrial export of bicarbonate (HCO3-, 3.6 mu eq L-1 yr(-1)). The percent increase in [Ca + Mg] concentrations in nonacidic lakes (0.3-3.2% yr(-1)) was significantly and positively correlated with scree proportion in the catchment area and negatively correlated with the extent of soil cover. Leaching experiments with freshly crushed granodiorite, the dominant bedrock,showed that accessory calcite and (to a lesser extent) apatite were important sources of Ca. We hypothesize that elevated terrestrial export of [Ca + Mg] :and HCO3- resulted from increased weathering caused by accelerated physical erosion of rocks due to elevated climate-related mechanical forces (an increasing frequency of days with high precipitation amounts and air temperatures fluctuating around 0 degrees C) during the last 2-3 decades. These climatic effects on water chemistry are especially strong in catchments where fragmented rocks are more exposed to weathering, and their position is less stable than in soil.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10503 - Water resources

Projekt

<a href="/cs/project/GA14-09231S" target="_blank" >GA14-09231S: Rozlišení vlivů změn v chemismu prostředí a klimatu na biogeochemické procesy a biodiversitu přírodních půd a vod alpinského pásma.</a><br>

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Rok uplatnění

2017

Kód důvěrnosti údajů

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

Název periodika

Environmental Science and Technology

ISSN

0013-936X

e-ISSN

—

Svazek periodika

51

Číslo periodika v rámci svazku

1

Stát vydavatele periodika

US - Spojené státy americké

Počet stran výsledku

8

Strana od-do

159-166

Kód UT WoS článku

000391346900018

EID výsledku v databázi Scopus

2-s2.0-85017524556