Groundwater discharge impacts marine isotope budgets of Li, Mg, Ca, Sr, and Ba.
Groundwater discharge impacts marine isotope budgets of Li, Mg, Ca, Sr, and Ba.
复制标题
地下水排泄对海洋中Li、Mg、Ca、Sr、Ba的同位素收支有影响。
DOI:
10.1038/s41467-020-20248-3
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发表时间:
2021-01-08
影响因子:
16.6
通讯作者:
Paytan A
中科院分区:
文献类型:
--
作者:
Mayfield KK;Eisenhauer A;Santiago Ramos DP;Higgins JA;Horner TJ;Auro M;Magna T;Moosdorf N;Charette MA;Gonneea ME;Brady CE;Komar N;Peucker-Ehrenbrink B;Paytan A
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, 5% 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. Groundwater discharge is a mechanism that transports chemicals from inland systems to the ocean, but it has been considered of secondary influence compared to rivers. Here the authors assess the global significance of groundwater discharge, finding that it has a unique and important contribution to ocean chemistry and Earth-system models.
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影响因子:
5.3
作者:
Cao, Zhimian;Siebert, Christopher;Frank, Martin
通讯作者:
Frank, Martin
影响因子:
3.5
作者:
Hartmann, Jens;Moosdorf, Nils
通讯作者:
Moosdorf, Nils
影响因子:
5.3
作者:
Rad, Setareh Denise;Allegre, Claude Jean;Louvat, Pascale
通讯作者:
Louvat, Pascale
影响因子:
4.6
作者:
Cho HM;Kim G;Kwon EY;Moosdorf N;Garcia-Orellana J;Santos IR
通讯作者:
Santos IR
影响因子:
56.9
作者:
Macdonald, Francis A.;Swanson-Hysell, Nicholas L.;Jagoutz, Oliver
通讯作者:
Jagoutz, Oliver