globalchange  > 气候减缓与适应
DOI: 10.1002/2017JG003907
Scopus记录号: 2-s2.0-85041068911
论文题名:
Influence of Glacier Melting and River Discharges on the Nutrient Distribution and DIC Recycling in the Southern Chilean Patagonia
作者: Vargas C.A.; Cuevas L.A.; Silva N.; González H.E.; De Pol-Holz R.; Narváez D.A.
刊名: Journal of Geophysical Research: Biogeosciences
ISSN: 21698953
出版年: 2018
卷: 123, 期:1
起始页码: 256
结束页码: 270
语种: 英语
英文关键词: carbon chemistry ; carbon dynamic ; fjord ; ocean acidification
Scopus关键词: alkalinity ; carbon cycle ; carbon isotope ; carbonate system ; chlorophyll ; dissolved inorganic carbon ; fjord ; glacier ; melting ; nutrient dynamics ; ocean acidification ; organic matter ; particulate organic carbon ; remineralization ; river discharge ; spatial distribution ; Chile ; Magellan Strait ; Patagonia
英文摘要: The 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) δ13C 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 δ13CDIC analysis suggests that most DIC in the upper 50 m depth was not derived from terrestrial organic matter remineralization. 13C-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 50 m 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. ©2017. American Geophysical Union. All Rights Reserved.
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/114779
Appears in Collections:气候减缓与适应

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作者单位: Aquatic Ecosystem Functioning Lab, Department of Aquatic System, Faculty of Environmental Sciences and Environmental Sciences Center EULA Chile, Universidad de Concepción, Concepción, Chile; Center for the Study of Multiple Drivers on Marine Socio-Ecological Systems, Universidad de Concepción, Concepción, Chile; Millenium Institute of Oceanography, Universidad de Concepción, Concepción, Chile; Escuela de Ciencias del Mar, Pontificia Universidad Católica de Chile, Valparaíso, Chile; Instituto de Ciencias Marinas y Limnológicas, Universidad Austral de Chile, Valdivia, Chile; Centro de Investigación de Ecosistemas de Altas Latitudes, Universidad Austral de Chile, Valdivia, Chile; GAIA-Antártica, Universidad de Magallanes, Punta Arenas, Chile; Department of Oceanography and COPAS Sur-Austral, Universidad de Concepción, Concepción, Chile

Recommended Citation:
Vargas C.A.,Cuevas L.A.,Silva N.,et al. Influence of Glacier Melting and River Discharges on the Nutrient Distribution and DIC Recycling in the Southern Chilean Patagonia[J]. Journal of Geophysical Research: Biogeosciences,2018-01-01,123(1)
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