2024-03-29T11:46:38Zhttp://digital.csic.es/dspace-oai/requestoai:digital.csic.es:10261/1162652018-08-06T12:16:53Zcom_10261_14com_10261_8col_10261_393
2015-06-08T10:35:18Z
urn:hdl:10261/116265
Carbon cycling in a Patagonian fjord: Strength of biological vs. physical pump
Taglialatela, S.
Flecha, Susana
Huertas, I. Emma
Prieto, Laura
Morris, Edward P.
European Commission
Fundación Endesa
Consejo Superior de Investigaciones Científicas (España)
Fundación San Ignacio del Huinay
Ministerio de Ciencia e Innovación (España)
Ministerio de Economía y Competitividad (España)
Póster presentado en la 2nd International Ocean Research Conference, celebrada en Barcelona del 17 al 21 de noviembre de 2014.
Understanding the role of the pelagic “biological and physical pump” in carbon cycling is critical to climate change adaptation and mitigation efforts especially in coastal areas characterized by intense biogeochemical cycling. Fjords are among the few coastal regions that appear to be net annual sinks for atmosphericCO2.
Vertical profiles of temperature and salinity were collected with a CTD revealing intense vertical structure in the water column that could be summarised as 2 layers with a transition-mixing region .Spatio-temporal sampling of physical and biogeochemical (C system, nutrients, Phyto- and Zooplankton, in situ dissolved pCO2) parameters was conducted in Comau Fjord (Puerto Montt-Chile) during Austral spring from the surface and deep layers.
Spatial variation in water column structure in the fjord was minimal, however the depth of the upper layer varies probably depending on the surface-water inputs. Surface waters had significantly lower pCO2 values compared to the atmosphere and deeper water. Concentrations of suspended material and chlorophyll a were higher deeper in the water column, suggesting concentration process of material across the halocline. Overall, concentrations of particulate matter and mesozooplankton (during the study period), were low compared to many mid-latitude regions, and near absent in the vicinity of the 2 rivers entering the fjord.
The low surface water pCO2 values suggest negative air-water CO2fluxes predominates within Comau Fjord during Austral spring. This preliminary study suggests that the geochemical properties of watershed and the low [DIC] of surface-water inputs, i.e., the physical pump, seems to play an important role in this region.
2015-06-08T10:35:18Z
2015-06-08T10:35:18Z
2014-11
2015-06-08T10:35:18Z
póster de congreso
2nd International Ocean Research Conference (2014)
http://hdl.handle.net/10261/116265
http://dx.doi.org/10.13039/501100000780
http://dx.doi.org/10.13039/501100007827
http://dx.doi.org/10.13039/501100003339
http://dx.doi.org/10.13039/501100007829
http://dx.doi.org/10.13039/501100004837
http://dx.doi.org/10.13039/501100003329
eng
Sí
openAccess