Influence of Glacier Melting and River Discharges on the Nutrient Distribution and DIC Recycling in the Southern Chilean Patagonia

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dc.contributor.authorVargas, Cristian A.
dc.contributor.authorAntonio Cuevas, L.
dc.contributor.authorSilva, Nelson
dc.contributor.authorGonzalez, Humberto E.
dc.contributor.authorDe Pol-Holz, Ricardo
dc.contributor.authorNarvaez, Diego A.
dc.date.accessioned2025-01-23T21:23:09Z
dc.date.available2025-01-23T21:23:09Z
dc.date.issued2018
dc.description.abstractThe Chilean Patagonia constitutes one of the most important and extensive fjord systems worldwide, therefore can be used as a natural laboratory to elucidate the pathway of both organic and inorganic matter in the receiving environment. In this study we use data collected during an intensive oceanographic cruise along the Magellan Strait into the Almirantazgo Fjord in southern Patagonia to evaluate how different sources of dissolved inorganic carbon (DIC) and recycling may impact particulate organic carbon (POC) C-13 and influence the nutrients and carbonate system spatial distribution. The carbonate system presented large spatial heterogeneity. The lowest total alkalinity and DIC were associated to freshwater dilution observed near melting glaciers. The C-13(DIC) analysis suggests that most DIC in the upper 50m depth was not derived from terrestrial organic matter remineralization. C-13-depleted riverine and ice-melting DIC influence the DIC pool along the study area, but due to that DIC concentration from rivers and glaciers is relatively low, atmospheric carbon contribution or biological processes seem to be more relevant. Intense undersaturation of CO2 was observed in high chlorophyll waters. Respired DIC coming from the bottom waters seems to be almost insignificant for the inorganic carbon pool and therefore do not impact significantly the stable carbon isotopic composition of dissolved organic carbon and POC in the upper 50m depth. Considering the combined effect of cold and low alkalinity waters due to ice melting, our results highlight the importance of these processes in determining corrosive waters for CaCO3 and local acidification processes associated to calving glacier in fjord ecosystems.
dc.fuente.origenWOS
dc.identifier.doi10.1002/2017JG003907
dc.identifier.eissn2169-8961
dc.identifier.issn2169-8953
dc.identifier.urihttps://doi.org/10.1002/2017JG003907
dc.identifier.urihttps://repositorio.uc.cl/handle/11534/101274
dc.identifier.wosidWOS:000425517800019
dc.issue.numero1
dc.language.isoen
dc.pagina.final270
dc.pagina.inicio256
dc.revistaJournal of geophysical research-biogeosciences
dc.rightsacceso restringido
dc.subjectcarbon dynamic
dc.subjectfjord
dc.subjectcarbon chemistry
dc.subjectocean acidification
dc.subject.ods13 Climate Action
dc.subject.ods14 Life Below Water
dc.subject.odspa13 Acción por el clima
dc.subject.odspa14 Vida submarina
dc.titleInfluence of Glacier Melting and River Discharges on the Nutrient Distribution and DIC Recycling in the Southern Chilean Patagonia
dc.typeartículo
dc.volumen123
sipa.indexWOS
sipa.trazabilidadWOS;2025-01-12
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