Contribution of Ekman pumping to the changes in properties and volume of the Eastern South Pacific Intermediate Water

ABSTRACT An update on the Eastern South Pacific Intermediate Water (ESPIW) distribution has been possible based on ARGO (Array for Real-Time Geostrophic Oceanography) data. This study comprised over 46,000 profiles obtained during 2007-2012 from an area between the western coast of South America and...

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Autores principales:	Hernández-Vaca,Freddy, Schneider,Wolfgang, Garcés-Vargas,José
Lenguaje:	English
Publicado:	Facultad de Ciencias Naturales y Oceanográficas, Universidad de Concepción 2017
Materias:	South Pacific wind stress curl intermediate water subduction
Acceso en línea:	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-65382017000200052
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spelling	oai:scielo:S0717-653820170002000522018-11-30Contribution of Ekman pumping to the changes in properties and volume of the Eastern South Pacific Intermediate WaterHernández-Vaca,FreddySchneider,WolfgangGarcés-Vargas,José South Pacific wind stress curl intermediate water subduction ABSTRACT An update on the Eastern South Pacific Intermediate Water (ESPIW) distribution has been possible based on ARGO (Array for Real-Time Geostrophic Oceanography) data. This study comprised over 46,000 profiles obtained during 2007-2012 from an area between the western coast of South America and 150°W, and 5° and 40°S. This information was complemented with data from the World Ocean Circulation Experiment (WOCE) P06 transects conducted in 1992 and 2010 at 32°30’S in the South Pacific Ocean. Based on a comparison of this update and data from 1990-2001, it was established that the ESPIW volume has increased by approximately 53%. Moreover, the area occupied by ESPIW in the 2010 WOCE P06 transect was 48% higher than in 1992. Ekman pumping velocity, calculated from the wind for the time and region of ESPIW formation, showed a significant increase in Ekman pumping between 2000 and 2012. The increase in Ekman pumping from 2000 onward could explain the observed changes in ESPIW distribution (the water mass had extended zonally) and properties (salinity showed a decrease of 0.1). These changes could be explained as the consequence of atmospheric climate variability over the interior ocean.info:eu-repo/semantics/openAccessFacultad de Ciencias Naturales y Oceanográficas, Universidad de ConcepciónGayana (Concepción) v.81 n.2 20172017-12-01text/htmlhttp://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-65382017000200052en10.4067/S0717-65382017000200052
institution	Scielo Chile
collection	Scielo Chile
language	English
topic	South Pacific wind stress curl intermediate water subduction
spellingShingle	South Pacific wind stress curl intermediate water subduction Hernández-Vaca,Freddy Schneider,Wolfgang Garcés-Vargas,José Contribution of Ekman pumping to the changes in properties and volume of the Eastern South Pacific Intermediate Water
description	ABSTRACT An update on the Eastern South Pacific Intermediate Water (ESPIW) distribution has been possible based on ARGO (Array for Real-Time Geostrophic Oceanography) data. This study comprised over 46,000 profiles obtained during 2007-2012 from an area between the western coast of South America and 150°W, and 5° and 40°S. This information was complemented with data from the World Ocean Circulation Experiment (WOCE) P06 transects conducted in 1992 and 2010 at 32°30’S in the South Pacific Ocean. Based on a comparison of this update and data from 1990-2001, it was established that the ESPIW volume has increased by approximately 53%. Moreover, the area occupied by ESPIW in the 2010 WOCE P06 transect was 48% higher than in 1992. Ekman pumping velocity, calculated from the wind for the time and region of ESPIW formation, showed a significant increase in Ekman pumping between 2000 and 2012. The increase in Ekman pumping from 2000 onward could explain the observed changes in ESPIW distribution (the water mass had extended zonally) and properties (salinity showed a decrease of 0.1). These changes could be explained as the consequence of atmospheric climate variability over the interior ocean.
author	Hernández-Vaca,Freddy Schneider,Wolfgang Garcés-Vargas,José
author_facet	Hernández-Vaca,Freddy Schneider,Wolfgang Garcés-Vargas,José
author_sort	Hernández-Vaca,Freddy
title	Contribution of Ekman pumping to the changes in properties and volume of the Eastern South Pacific Intermediate Water
title_short	Contribution of Ekman pumping to the changes in properties and volume of the Eastern South Pacific Intermediate Water
title_full	Contribution of Ekman pumping to the changes in properties and volume of the Eastern South Pacific Intermediate Water
title_fullStr	Contribution of Ekman pumping to the changes in properties and volume of the Eastern South Pacific Intermediate Water
title_full_unstemmed	Contribution of Ekman pumping to the changes in properties and volume of the Eastern South Pacific Intermediate Water
title_sort	contribution of ekman pumping to the changes in properties and volume of the eastern south pacific intermediate water
publisher	Facultad de Ciencias Naturales y Oceanográficas, Universidad de Concepción
publishDate	2017
url	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-65382017000200052
work_keys_str_mv	AT hernandezvacafreddy contributionofekmanpumpingtothechangesinpropertiesandvolumeoftheeasternsouthpacificintermediatewater AT schneiderwolfgang contributionofekmanpumpingtothechangesinpropertiesandvolumeoftheeasternsouthpacificintermediatewater AT garcesvargasjose contributionofekmanpumpingtothechangesinpropertiesandvolumeoftheeasternsouthpacificintermediatewater
_version_	1718442181383946240

Contribution of Ekman pumping to the changes in properties and volume of the Eastern South Pacific Intermediate Water

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