Two years of observations of warm-core anticyclones in the Labrador Sea and their seasonal cycle in heat and salt stratification
Author Posting. © American Meteorological Society, 2014. This article is posted here by permission of American Meteorological Society for personal use, not for redistribution. The definitive version was published in Journal of Physical Oceanography 44 (2014): 427–444, doi:10.1175/JPO-D-13-070.1. Bet...
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ftwhoas:oai:darchive.mblwhoilibrary.org:1912/6530 2023-05-15T17:06:09+02:00 Two years of observations of warm-core anticyclones in the Labrador Sea and their seasonal cycle in heat and salt stratification de Jong, Marieke F. Bower, Amy S. Furey, Heather H. 2014-02 application/pdf https://hdl.handle.net/1912/6530 en_US eng American Meteorological Society https://doi.org/10.1175/JPO-D-13-070.1 Journal of Physical Oceanography 44 (2014): 427–444 https://hdl.handle.net/1912/6530 doi:10.1175/JPO-D-13-070.1 Journal of Physical Oceanography 44 (2014): 427–444 doi:10.1175/JPO-D-13-070.1 Geographic location/entity North Atlantic Ocean Circulation/ Dynamics Mesoscale processes Atm/Ocean Structure/ Phenomena Anticyclones Boundary currents Observational techniques and algorithms In situ oceanic observations Variability Seasonal cycle Article 2014 ftwhoas https://doi.org/10.1175/JPO-D-13-070.1 2022-05-28T22:59:03Z Author Posting. © American Meteorological Society, 2014. This article is posted here by permission of American Meteorological Society for personal use, not for redistribution. The definitive version was published in Journal of Physical Oceanography 44 (2014): 427–444, doi:10.1175/JPO-D-13-070.1. Between 25 September 2007 and 28 September 2009, a heavily instrumented mooring was deployed in the Labrador Sea, offshore of the location where warm-core, anticyclonic Irminger rings are formed. The 2-year time series offers insight into the vertical and horizontal structure of newly formed Irminger rings and their heat and salt transport into the interior basin. In 2 years, 12 Irminger rings passed by the mooring. Of these, 11 had distinct properties, while 1 anticyclone likely passed the mooring twice. Eddy radii (11–35 km) were estimated using the dynamic height signal of the anticyclones (8–18 cm) together with the observed velocities. The anticyclones show a seasonal cycle in core properties when observed (1.9°C in temperature and 0.07 in salinity at middepth) that has not been described before. The temperature and salinity are highest in fall and lowest in spring. Cold, fresh caps, suggested to be an important source of freshwater, were seen in spring but were almost nonexistent in fall. The heat and freshwater contributions by the Irminger rings show a large spread (from 12 to 108 MJ m−2 and from −0.5 to −4.7 cm, respectively) for two reasons. First, the large range of radii leads to large differences in transported volume. Second, the seasonal cycle leads to changes in heat and salt content per unit volume. This implies that estimates of heat and freshwater transport by eddies should take the distribution of eddy properties into account in order to accurately assess their contribution to the restratification. This work was supported by the U.S. National Science Foundation and the Postdoctoral Scholar Program at the Woods Hole Oceanographic Institution, with funding provided by the Devonshire Foundation. ... Article in Journal/Newspaper Labrador Sea North Atlantic Woods Hole Scientific Community: WHOAS (Woods Hole Open Access Server) Journal of Physical Oceanography 44 2 427 444 |
institution |
Open Polar |
collection |
Woods Hole Scientific Community: WHOAS (Woods Hole Open Access Server) |
op_collection_id |
ftwhoas |
language |
English |
topic |
Geographic location/entity North Atlantic Ocean Circulation/ Dynamics Mesoscale processes Atm/Ocean Structure/ Phenomena Anticyclones Boundary currents Observational techniques and algorithms In situ oceanic observations Variability Seasonal cycle |
spellingShingle |
Geographic location/entity North Atlantic Ocean Circulation/ Dynamics Mesoscale processes Atm/Ocean Structure/ Phenomena Anticyclones Boundary currents Observational techniques and algorithms In situ oceanic observations Variability Seasonal cycle de Jong, Marieke F. Bower, Amy S. Furey, Heather H. Two years of observations of warm-core anticyclones in the Labrador Sea and their seasonal cycle in heat and salt stratification |
topic_facet |
Geographic location/entity North Atlantic Ocean Circulation/ Dynamics Mesoscale processes Atm/Ocean Structure/ Phenomena Anticyclones Boundary currents Observational techniques and algorithms In situ oceanic observations Variability Seasonal cycle |
description |
Author Posting. © American Meteorological Society, 2014. This article is posted here by permission of American Meteorological Society for personal use, not for redistribution. The definitive version was published in Journal of Physical Oceanography 44 (2014): 427–444, doi:10.1175/JPO-D-13-070.1. Between 25 September 2007 and 28 September 2009, a heavily instrumented mooring was deployed in the Labrador Sea, offshore of the location where warm-core, anticyclonic Irminger rings are formed. The 2-year time series offers insight into the vertical and horizontal structure of newly formed Irminger rings and their heat and salt transport into the interior basin. In 2 years, 12 Irminger rings passed by the mooring. Of these, 11 had distinct properties, while 1 anticyclone likely passed the mooring twice. Eddy radii (11–35 km) were estimated using the dynamic height signal of the anticyclones (8–18 cm) together with the observed velocities. The anticyclones show a seasonal cycle in core properties when observed (1.9°C in temperature and 0.07 in salinity at middepth) that has not been described before. The temperature and salinity are highest in fall and lowest in spring. Cold, fresh caps, suggested to be an important source of freshwater, were seen in spring but were almost nonexistent in fall. The heat and freshwater contributions by the Irminger rings show a large spread (from 12 to 108 MJ m−2 and from −0.5 to −4.7 cm, respectively) for two reasons. First, the large range of radii leads to large differences in transported volume. Second, the seasonal cycle leads to changes in heat and salt content per unit volume. This implies that estimates of heat and freshwater transport by eddies should take the distribution of eddy properties into account in order to accurately assess their contribution to the restratification. This work was supported by the U.S. National Science Foundation and the Postdoctoral Scholar Program at the Woods Hole Oceanographic Institution, with funding provided by the Devonshire Foundation. ... |
format |
Article in Journal/Newspaper |
author |
de Jong, Marieke F. Bower, Amy S. Furey, Heather H. |
author_facet |
de Jong, Marieke F. Bower, Amy S. Furey, Heather H. |
author_sort |
de Jong, Marieke F. |
title |
Two years of observations of warm-core anticyclones in the Labrador Sea and their seasonal cycle in heat and salt stratification |
title_short |
Two years of observations of warm-core anticyclones in the Labrador Sea and their seasonal cycle in heat and salt stratification |
title_full |
Two years of observations of warm-core anticyclones in the Labrador Sea and their seasonal cycle in heat and salt stratification |
title_fullStr |
Two years of observations of warm-core anticyclones in the Labrador Sea and their seasonal cycle in heat and salt stratification |
title_full_unstemmed |
Two years of observations of warm-core anticyclones in the Labrador Sea and their seasonal cycle in heat and salt stratification |
title_sort |
two years of observations of warm-core anticyclones in the labrador sea and their seasonal cycle in heat and salt stratification |
publisher |
American Meteorological Society |
publishDate |
2014 |
url |
https://hdl.handle.net/1912/6530 |
genre |
Labrador Sea North Atlantic |
genre_facet |
Labrador Sea North Atlantic |
op_source |
Journal of Physical Oceanography 44 (2014): 427–444 doi:10.1175/JPO-D-13-070.1 |
op_relation |
https://doi.org/10.1175/JPO-D-13-070.1 Journal of Physical Oceanography 44 (2014): 427–444 https://hdl.handle.net/1912/6530 doi:10.1175/JPO-D-13-070.1 |
op_doi |
https://doi.org/10.1175/JPO-D-13-070.1 |
container_title |
Journal of Physical Oceanography |
container_volume |
44 |
container_issue |
2 |
container_start_page |
427 |
op_container_end_page |
444 |
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1766061149883727872 |