Groundwater discharge impacts marine isotope budgets of Li, Mg, Ca, Sr, and Ba

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00025798%3A_____%2F21%3A00000008" target="_blank" >RIV/00025798:_____/21:00000008 - isvavai.cz</a>
Result on the web
<a href="https://www.nature.com/ncomms/" target="_blank" >https://www.nature.com/ncomms/</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1038/s41467-020-20248-3" target="_blank" >10.1038/s41467-020-20248-3</a>

Result language
angličtina
Original language name
Groundwater discharge impacts marine isotope budgets of Li, Mg, Ca, Sr, and Ba
Original language description
Groundwater-derived solute fluxes to the ocean have long been assumed static and subordinate to riverine fluxes, if not neglected entirely, in marine isotope budgets. Here we present concentration and isotope data for Li, Mg, Ca, Sr, and Ba in coastal groundwaters to constrain the importance of groundwater discharge in mediating the magnitude and isotopic composition of terrestrially derived solute fluxes to the ocean. Data were extrapolated globally using three independent volumetric estimates of groundwater discharge to coastal waters, from which we estimate that groundwater-derived solute fluxes represent, at a minimum, 5percent of riverine fluxes for Li, Mg, Ca, Sr, and Ba. The isotopic compositions of the groundwater-derived Mg, Ca, and Sr fluxes are distinct from global riverine averages, while Li and Ba fluxes are isotopically indistinguishable from rivers. These differences reflect a strong dependence on coastal lithology that should be considered a priority for parameterization in Earth-system models.
Czech name
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Czech description
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Type
J<sub>imp</sub> - 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

Publication year
2021
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

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