Oceanographic processes driving low-oxygen conditions inside Patagonian fjords

Abstract < 30  % oxygen saturation, 2 mL L- 1 µ mol L- 1) are observed. An in situ dataset of hydrographic and biogeochemical variables (1507 stations), collected from sporadic oceanographic cruises between 1970 and 2021, was used to evaluate the mechanisms involved in the presence of LDOW and hypoxic conditions in northern Patagonian fjords. Results denoted areas with LDOW and hypoxia coinciding with the accumulation of inorganic nutrients and the presence of salty and oxygen-poor Equatorial Subsurface Water mass. The role of biological activity in oxygen reduction was evident in the dominance of community respiration over gross primary production. This study elucidates the physical and biogeochemical processes contributing to hypoxia and LDOW in the northern Patagonian fjords, highlighting the significance of performing multidisciplinary research and combining observational and modeling work. This approach underscores the importance of a holistic understanding of the subject, encompassing both real-world observations and insights provided by modeling techniques.

Object Details

• Location: Deutsche Nationalbibliothek Frankfurt am Main
• Extent: Online-Ressource
• Language: Englisch

References and Relationships

• Bibliographic citation: Oceanographic processes driving low-oxygen conditions inside Patagonian fjords ; volume:21 ; number:6 ; year:2024 ; pages:1433-1459 ; extent:27 ; Biogeosciences ; 21, Heft 6 (2024), 1433-1459 (gesamt 27)

Contributors, Places and Time

• Creator: Linford, Pamela ; Pérez-Santos, Iván ; Montero, Paulina ; Díaz, Patricio A. ; Aracena, Claudia ; Pinilla, Elías ; Barrera, Facundo ; Castillo, Manuel ; Alvera-Azcárate, Aida ; Alvarado, Mónica ; Soto, Gabriel ; Pujol, Cécile ; Schwerter, Camila ; Arenas-Uribe, Sara ; Navarro, Pilar ; Mancilla-Gutiérrez, Guido ; Altamirano, Robinson ; San Martín, Javiera ; Soto-Riquelme, Camila

Further information

• DOI: 10.5194/bg-21-1433-2024
• URN: urn:nbn:de:101:1-2024032803403781036370
• Rights: Open Access; Der Zugriff auf das Objekt ist unbeschränkt möglich.
• Last update: 14.08.2025, 11:03 AM CEST