@article{fdi:010079743,
  title = {{G}lobal variability in seawater {M}g:{C}a and {S}r:{C}a ratios in the modern ocean},
  author = {{L}ebrato, {M}. and {G}arbe-{S}chonberg, {D}. and {M}uller, {M}. {N}. and {B}lanco-{A}meijeiras, {S}. and {F}eely, {R}. {A}. and {L}orenzoni, {L}. and {M}olinero, {J}. {C}. and {B}remer, {K}. and {J}ones, {D}. {O}. {B}. and {I}glesias-{R}odriguez, {D}. and {G}reeley, {D}. and {L}amare, {M}. {D}. and {P}aulmier, {A}ur{\'e}lien and {G}raco, {M}. and {C}artes, {J}. and {R}amos, {J}. {B}. {E}. and de {L}ara, {A}. and {S}anchez-{L}eal, {R}. and {J}imenez, {P}. and {P}aparazzo, {F}. {E}. and {H}artman, {S}. {E}. and {W}esternstroer, {U}. and {K}uter, {M}. and {B}enavides, {R}. and da {S}ilva, {A}. {F}. and {B}ell, {S}. and {P}ayne, {C}. and {O}lafsdottir, {S}. and {R}obinson, {K}. and {J}antunen, {L}. {M}. and {K}orablev, {A}. and {W}ebster, {R}. {J}. and {J}ones, {E}. {M}. and {G}ilg, {O}. and du {B}ois, {P}. {B}. and {B}eldowski, {J}. and {A}shjian, {C}. and {Y}ahia, {N}. {D}. and {T}wining, {B}. and {C}hen, {X}. {G}. and {T}seng, {L}. and {H}wang, {J}. {S}. and {D}ahms, {H}. {U}. and {O}schlies, {A}.},
  editor = {},
  language = {{ENG}},
  abstract = {{S}eawater {M}g:{C}a and {S}r:{C}a ratios are biogeochemical parameters reflecting the {E}arth-ocean-atmosphere dynamic exchange of elements. {T}he ratios' dependence on the environment and organisms' biology facilitates their application in marine sciences. {H}ere, we present a measured single-laboratory dataset, combined with previous data, to test the assumption of limited seawater {M}g:{C}a and {S}r:{C}a variability across marine environments globally. {H}igh variability was found in open-ocean upwelling and polar regions, shelves/neritic and river-influenced areas, where seawater {M}g:{C}a and {S}r:{C}a ratios range from similar to 4.40 to 6.40 mmol:mol and similar to 6.95 to 9.80 mmol:mol, respectively. {O}pen-ocean seawater {M}g:{C}a is semi-conservative (similar to 4.90 to 5.30 mol:mol), while {S}r:{C}a is more variable and nonconservative (similar to 7.70 to 8.80 mmol:mol); both ratios are nonconservative in coastal seas. {F}urther, the {C}a, {M}g, and {S}r elemental fluxes are connected to large total alkalinity deviations from {I}nternational {A}ssociation for the {P}hysical {S}ciences of the {O}ceans ({IAPSO}) standard values. {B}ecause there is significant modern seawater {M}g:{C}a and {S}r:{C}a ratios variability across marine environments we cannot absolutely assume that fossil archives using taxa-specific proxies reflect true global seawater chemistry but rather taxa- and process-specific ecosystem variations, reflecting regional conditions. {T}his variability could reconcile secular seawater {M}g:{C}a and {S}r:{C}a ratio reconstructions using different taxa and techniques by assuming an error of 1 to 1.50 mol:mol, and 1 to 1.90 mmol:mol, respectively. {T}he modern ratios' variability is similar to the reconstructed rise over 20 {M}a ({N}eogene {P}eriod), nurturing the question of semi-nonconservative behavior of {C}a, {M}g, and {S}r over modern {E}arth geological history with an overlooked environmental effect.},
  keywords = {global ; seawater ; {M}g:{C}a ; {S}r:{C}a ; biogeochemistry ; {MONDE}},
  booktitle = {},
  journal = {{P}roceedings of the {N}ational {A}cademy of {S}ciences of the {U}nited {S}tates of {A}merica},
  volume = {117},
  numero = {36},
  pages = {22281--22292},
  ISSN = {0027-8424},
  year = {2020},
  DOI = {10.1073/pnas.1918943117},
  URL = {https://www.documentation.ird.fr/hor/fdi:010079743},
}