Silicon isotopes in Arctic and sub-Arctic glacial meltwaters: the role of subglacial weathering in the silicon cycle

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11310%2F19%3A10409149" target="_blank" >RIV/00216208:11310/19:10409149 - isvavai.cz</a>

Result on the web

<a href="https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=ZVXV96P7Ob" target="_blank" >https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=ZVXV96P7Ob</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1098/rspa.2019.0098" target="_blank" >10.1098/rspa.2019.0098</a>

Result language

angličtina

Original language name

Silicon isotopes in Arctic and sub-Arctic glacial meltwaters: the role of subglacial weathering in the silicon cycle

Original language description

Glacial environments play an important role in high-latitude marine nutrient cycling, potentially contributing significant fluxes of silicon (Si) to the polar oceans, either as dissolved silicon (DSi) or as dissolvable amorphous silica (ASi). Silicon is a key nutrient in promoting marine primary productivity, contributing to atmospheric CO2 removal. We present the current understanding of Si cycling in glacial systems, focusing on the Si isotope (delta30 SI) composition of glacial meltwaters. We combine existing glacial delta30 SI data with new measurements from 20 sub-Arctic glaciers, showing that glacial meltwaters consistently export isotopically light DSi compared with non-glacial rivers (+0.16 parts per thousand versus +1.38 parts per thousand). Glacial delta30 Si(ASi) composition ranges from -0.05 parts per thousand to -0.86 parts per thousand but exhibits low seasonal variability. Silicon fluxes and delta30 Si composition from glacial systems are not commonly included in global Si budgets and isotopic mass balance calculations at present. We discuss outstanding questions, including the formation mechanism of ASi and the export of glacial nutrients from fjords. Finally, we provide a contextual framework for the recent advances in our understanding of subglacial Si cycling and highlight critical research avenues for assessing potential future changes in these environments.

Czech name

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Czech description

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Type

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

CEP classification

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OECD FORD branch

10505 - Geology

Project

Result was created during the realization of more than one project. More information in the Projects tab.

Continuities

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

Publication year

2019

Confidentiality

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

Name of the periodical

Proceedings of the Royal Society A: Mathematical, Physical and Engineering Sciences

ISSN

1364-5021

e-ISSN

—

Volume of the periodical

475

Issue of the periodical within the volume

2228

Country of publishing house

GB - UNITED KINGDOM

Number of pages

27

Pages from-to

20190098

UT code for WoS article

000482874300005

EID of the result in the Scopus database

2-s2.0-85072131050