气候变化领域集成服务门户(CCPortal): Oceanographic processes driving low-oxygen conditions inside Patagonian fjords

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DOI	10.5194/bg-21-1433-2024
	Oceanographic processes driving low-oxygen conditions inside Patagonian fjords
	Linford, Pamela; Perez-Santos, Ivan; Montero, Paulina; Diaz, Patricio A.; Aracena, Claudia; Pinilla, Elias; Barrera, Facundo; Castillo, Manuel; Alvera-Azcarate, Aida; Alvarado, Monica; Soto, Gabriel; Pujol, Cecile; Schwerter, Camila; Arenas-Uribe, Sara; Navarro, Pilar; Mancilla-Gutierrez, Guido; Altamirano, Robinson; San Martin, Javiera; Soto-Riquelme, Camila
发表日期	2024
ISSN	1726-4170
EISSN	1726-4189
起始页码	21
结束页码	6
卷号	21 期号:6
英文摘要	The dissolved oxygen (DO) levels of coastal ocean waters have decreased over the last few decades in part because of the increase in surface and subsurface water temperature caused by climate change, the reduction in ocean ventilation, and the increase in stratification and eutrophication. In addition, biological and human activity in coastal zones, bays, and estuaries has contributed to the acceleration of current oxygen loss. The Patagonian fjord and channel system is one world region where low-DO water (LDOW, 30 %-60 % oxygen saturation) and hypoxia conditions ( < 30 % oxygen saturation, 2 mL L (-1) or 89.2 mu 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.
语种	英语
WOS研究方向	Environmental Sciences & Ecology ; Geology
WOS类目	Ecology ; Geosciences, Multidisciplinary
WOS记录号	WOS:001192146100001
来源期刊	BIOGEOSCIENCES
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/298895
作者单位	Universidad de Los Lagos; Universidad de Los Lagos; Universidad de Concepcion; Universidad de Concepcion; Universidad de Los Lagos; Universidad Bernardo O'Higgins; Universidad Austral de Chile; Instituto de Fomento Pesquero (Valparaiso); Consejo Nacional de Investigaciones Cientificas y Tecnicas (CONICET); Consejo Nacional de Investigaciones Cientificas y Tecnicas (CONICET); Universidad de Valparaiso; University of Liege; University of Maine System; University of Maine Orono
推荐引用方式 GB/T 7714	Linford, Pamela,Perez-Santos, Ivan,Montero, Paulina,et al. Oceanographic processes driving low-oxygen conditions inside Patagonian fjords[J],2024,21(6).
APA	Linford, Pamela.,Perez-Santos, Ivan.,Montero, Paulina.,Diaz, Patricio A..,Aracena, Claudia.,...&Soto-Riquelme, Camila.(2024).Oceanographic processes driving low-oxygen conditions inside Patagonian fjords.BIOGEOSCIENCES,21(6).
MLA	Linford, Pamela,et al."Oceanographic processes driving low-oxygen conditions inside Patagonian fjords".BIOGEOSCIENCES 21.6(2024).