Deep ventilation event during fall and winter 2015 in the Puyuhuapi Fjord (44.6°S)

The Puyuhuapi Fjord has previously been reported as one of the hypoxic fjords in Patagonia (dissolved oxygen -DO below 2 mL L-1). Hydrographic sampling between 1995-2015 confirmed hypoxia below 100 m depth, down to the bottom (250 m). A line of sensors at an oceanographic mooring in Puyuhuapi were d...

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Autor principal:	Pérez-Santos,Iván
Lenguaje:	English
Publicado:	Pontificia Universidad Católica de Valparaíso. Facultad de Recursos Naturales. Escuela de Ciencias del Mar 2017
Materias:	Dissolved oxygen hypoxia ventilation Puyuhuapi Patagonian fjords southern Chile
Acceso en línea:	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-560X2017000100025
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spelling	oai:scielo:S0718-560X20170001000252017-04-21Deep ventilation event during fall and winter 2015 in the Puyuhuapi Fjord (44.6°S)Pérez-Santos,Iván Dissolved oxygen hypoxia ventilation Puyuhuapi Patagonian fjords southern Chile The Puyuhuapi Fjord has previously been reported as one of the hypoxic fjords in Patagonia (dissolved oxygen -DO below 2 mL L-1). Hydrographic sampling between 1995-2015 confirmed hypoxia below 100 m depth, down to the bottom (250 m). A line of sensors at an oceanographic mooring in Puyuhuapi were deployed to continuously record the temporal-vertical behaviour of water column temperature and salinity from the surface down to ~120 m, from February to July 2015. A Multi-parameter water quality sonde was deployed at the bottom of the line, with a DO optical sensor. From February to mid-May, hypoxia was sustained (1.4-1.6 mL L-1). However, from May until the end of June, DO values increased (2.8 mL L-1), exceeding the hypoxia threshold. This was the first event of deep ventilation reported in a Patagonian fjord. During this time period, deep water temperatures increased by ~1.3°C, coinciding with the decreased in salinity from 33.6 to 32.8. The main cause of this event was attributed to the arrival of a new volume of mixed oceanic water into the Fjord, transported by Modified Subantartic Water, with warm temperatures and slightly higher DO values, given its origin in the surface layer of the outer region of the Patagonian fjords and channels.info:eu-repo/semantics/openAccessPontificia Universidad Católica de Valparaíso. Facultad de Recursos Naturales. Escuela de Ciencias del MarLatin american journal of aquatic research v.45 n.1 20172017-03-01text/htmlhttp://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-560X2017000100025en10.3856/vol45-issue1-fulltext-25
institution	Scielo Chile
collection	Scielo Chile
language	English
topic	Dissolved oxygen hypoxia ventilation Puyuhuapi Patagonian fjords southern Chile
spellingShingle	Dissolved oxygen hypoxia ventilation Puyuhuapi Patagonian fjords southern Chile Pérez-Santos,Iván Deep ventilation event during fall and winter 2015 in the Puyuhuapi Fjord (44.6°S)
description	The Puyuhuapi Fjord has previously been reported as one of the hypoxic fjords in Patagonia (dissolved oxygen -DO below 2 mL L-1). Hydrographic sampling between 1995-2015 confirmed hypoxia below 100 m depth, down to the bottom (250 m). A line of sensors at an oceanographic mooring in Puyuhuapi were deployed to continuously record the temporal-vertical behaviour of water column temperature and salinity from the surface down to ~120 m, from February to July 2015. A Multi-parameter water quality sonde was deployed at the bottom of the line, with a DO optical sensor. From February to mid-May, hypoxia was sustained (1.4-1.6 mL L-1). However, from May until the end of June, DO values increased (2.8 mL L-1), exceeding the hypoxia threshold. This was the first event of deep ventilation reported in a Patagonian fjord. During this time period, deep water temperatures increased by ~1.3°C, coinciding with the decreased in salinity from 33.6 to 32.8. The main cause of this event was attributed to the arrival of a new volume of mixed oceanic water into the Fjord, transported by Modified Subantartic Water, with warm temperatures and slightly higher DO values, given its origin in the surface layer of the outer region of the Patagonian fjords and channels.
author	Pérez-Santos,Iván
author_facet	Pérez-Santos,Iván
author_sort	Pérez-Santos,Iván
title	Deep ventilation event during fall and winter 2015 in the Puyuhuapi Fjord (44.6°S)
title_short	Deep ventilation event during fall and winter 2015 in the Puyuhuapi Fjord (44.6°S)
title_full	Deep ventilation event during fall and winter 2015 in the Puyuhuapi Fjord (44.6°S)
title_fullStr	Deep ventilation event during fall and winter 2015 in the Puyuhuapi Fjord (44.6°S)
title_full_unstemmed	Deep ventilation event during fall and winter 2015 in the Puyuhuapi Fjord (44.6°S)
title_sort	deep ventilation event during fall and winter 2015 in the puyuhuapi fjord (44.6°s)
publisher	Pontificia Universidad Católica de Valparaíso. Facultad de Recursos Naturales. Escuela de Ciencias del Mar
publishDate	2017
url	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-560X2017000100025
work_keys_str_mv	AT perezsantosivan deepventilationeventduringfallandwinter2015inthepuyuhuapifjord446s
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Deep ventilation event during fall and winter 2015 in the Puyuhuapi Fjord (44.6°S)

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