@article{fdi:010080310, title = {{T}ropical mangrove forests as a source of dissolved rare earth elements and yttrium to the ocean}, author = {{D}uc {H}uy {D}ang and {Z}hirou {Z}hang and {W}ei {W}ang and {O}ursel, {B}. and {J}uillot, {F}arid and {D}upouy, {C}{\'e}cile and {L}emonnier, {H}. and {M}ounier, {S}.}, editor = {}, language = {{ENG}}, abstract = {{R}are earth elements ({REE}s) and {Y} are commonly used as geochemical proxies for water chemistry, history of the continental crust and provenance studies. {A}t the continent-ocean interface, the estuarine geochemistry of {REE}s is commonly considered to be driven by a largescale removal. {C}onsequently, the river-borne flux of dissolved {REE}s to the marine budget is assumed as a minor fraction. {H}ere, we report a significant release of dissolved {REE}s, together with a fractionation between light, heavy {REE}s and {Y}, in the tropical mangrove estuaries of {N}ew {C}aledonia. {T}hese observations were associated with internal recycling within the redox-dynamic mangrove system. {T}he possible contribution of groundwater can be ruled out based on water stable isotopes. {T}hese findings imply that tropical mangrove estuaries act as a sizeable source of {REE}s and {Y} to the ocean rather than as a buffer zone. {W}e extrapolated our data toward global dissolved fluxes of {REE}s and {Y} through the mangroves. {T}his preliminary calculation suggests that the mangrove system supplies 2.6-5% of global river-borne dissolved {N}d, a {REE} with the most comprehensive mass balance. {T}herefore, oceanic mass balance budget models may need to consider this atypical system as an input to balance the global distribution of {REE}s and {Y}.}, keywords = {{ESTUAIRE} ; {CHIMIE} {DE} {L}'{EAU} ; {TERRES} {RARES} ; {MANGROVE} ; {ANALYSE} {ISOTOPIQUE} ; {CYCLE} {BIOGEOCHIMIQUE} ; {YTTRIUM} ; {NOUVELLE} {CALEDONIE} ; {PACIFIQUE} ; {ZONE} {TROPICALE}}, booktitle = {}, journal = {{C}hemical {G}eology}, volume = {576}, numero = {}, pages = {120278 [12 ]}, ISSN = {0009-2541}, year = {2021}, DOI = {10.1016/j.chemgeo.2021.120278}, URL = {https://www.documentation.ird.fr/hor/fdi:010080310}, }