Brief description
This is a collection of data in East Antarctica from Southern Elephant seal's between 2004 and 2009. The monthly data set has been further classified by polynya and year. Additionally, we provide a dataset of the polynyas contours defined following a criteria of 75% of sea-ice concentration for each individual month between 2004 and 2019. Data are provided in .mat formatLineage
Maintenance and Update Frequency: notPlanned
Statement: The vertical temperature-salinity profiles used in this sdata set were collected by southern elephant seals (Mirounga leonina) instrumented with Conductivity-Temperature-Depth Satellite-Relayed Data Loggers (CTD-SRDLs) during their annual post-molt (February–November) foraging trips. The profile data were retrieved from the Marine Mammals Exploring the Oceans Pole to Pole (MEOP) data- base (http://www.meop.net/).
The processing involved in this data set comprises the monthly delimitation of East Antartic polynyas between 2004 and 2019 and the assignation of the data profiles to any of the 18 detected polynyas. We identified polynyas using a combination of dynamic sea-ice concentration and static bathymetric data. First, the whole region was divided into coarse-scale polygons, each one containing one polynya as based on previous descriptions in the literature (Amblas & Dowdeswell, 2018; Arrigo & van Dijken, 2003; Labrousse et al., 2018; Tamura et al., 2016). After this first identification, two criteria were used to define the area of each polynya and to assign seal CTD profiles to them. In winter (from April to October), monthly sea-ice concentration contours of 75% within each polygon were selected and all data inside those contours were assigned to belong to the given polynya. With this method, polynya surface area changes monthly. In summer (from November to March), when most of the region is indeed ice-free, we assigned CTD profiles that were located within the 75% contours of mean sea- ice concentration between April and October of the preceding winter. To avoid including data off the continental shelf, the contours are further constrained by the continental slope (defined by depths<1,500 m).
Notes
CreditThe seal CTD-SRDL tags and deployment were funded and supported through a collaboration between the French Polar Institute (program 109: PI. H. Weimerskirch and 1201: PI. C. Gilbert and C. Guinet), the SNO-MEMO and CNES-TOSCA and the Integrated Marine Observing System.
Credit
The profile data were retrieved from the Marine Mammals Exploring the Oceans Pole to Pole (MEOP) database (http://www.meop.net/), which is a comprehensive quality-controlled database.
The profile data were retrieved from the Marine Mammals Exploring the Oceans Pole to Pole (MEOP) database (http://www.meop.net/), which is a comprehensive quality-controlled database.
Credit
This project received grant funding from the Australian Government as part of the Antarctic Science Collaboration Initiative program. The Australian Research Council provided financial support through Discovery Projects DP180101667 and DP210103091. E.P.R is supported under ARC Discovery grant DP180101667 and S.B is supported under ARC DECRA grant DE180100828. The work was supported in part by the Centre for Southern Hemisphere Oceans Research, a partnership between CSIRO, the Qingdao National Laboratory for Marine Science and Technology, the University of New South Wales and the University of Tasmania and by the Australian Antarctic Program Partnership
This project received grant funding from the Australian Government as part of the Antarctic Science Collaboration Initiative program. The Australian Research Council provided financial support through Discovery Projects DP180101667 and DP210103091. E.P.R is supported under ARC Discovery grant DP180101667 and S.B is supported under ARC DECRA grant DE180100828. The work was supported in part by the Centre for Southern Hemisphere Oceans Research, a partnership between CSIRO, the Qingdao National Laboratory for Marine Science and Technology, the University of New South Wales and the University of Tasmania and by the Australian Antarctic Program Partnership
Issued: 03 04 2023
Data time period: 2004-01-01 to 2019-12-31
text: westlimit=30; southlimit=-72.00; eastlimit=150; northlimit=-60.00
text: uplimit=1300; downlimit=0
Subjects
ANIMALS/VERTEBRATES |
Antarctic data |
Antarctic science |
BIOLOGICAL CLASSIFICATION |
CARNIVORES |
Continents | Continents | Antarctica |
Density of the water body |
EARTH SCIENCE |
Latitude |
Longitude |
MAMMALS |
Marine ecology |
Mixed Layer Depth |
OCEANS |
POLYNYAS |
Physical oceanography |
Polynya's contours |
Practical salinity of the water body |
SEA ICE |
SEALS/SEA LIONS/WALRUSES |
Seal tag number |
Stratification (N2) |
Temperature of the water body |
Time |
land-sea mammals |
oceans |
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Other Information
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Identifiers
- global : e2b60954-29ba-4b9b-89a3-e06377f111ed
