Details of Altimetry-drived Antarctic Circumpolar Current fronts

Back

Dataset identification

Title of datasetAltimetry-drived Antarctic Circumpolar Current fronts
Narrative summary of datasetAn up-to-date map of the Antarctic Circumpolar Current (ACC) fronts is constructed from the latest version of mean dynamic topography from satellite altimetry (Park et al., 2019, Observations of the Antarctic Circumpolar Current over the Udintsev Fracture Zone, the narrowest choke point in the Southern Ocean, JGR-Oceans, in review). These are derived from the 1/8°-resolution Mean Dynamic Topography (MDT) of Centre National d’Etudes Spatiales-Collect Localisation Satellites 2018 (CNES-CLS18) for the 1993-2012 reference period [(Rio)-[https://motu.aviso.altimetry.fr/motu-web/Motu] et al., The new CNES-CLS18 Mean Dynamic Topography solution, in preparation]. The narrowest ACC width in the Udintsev Fracture Zone (UFZ), with the strongest concentration of the three major ACC fronts within a limited distance as short as 170 km, about 40% narrower than that at Drake Passage. At 144°W, at the entrance of the UFZ, which lies between the Pacific-Antarctic Ridge (PAR) and its eastwardly-offset segment (offset PAR segment), there is a triple confluence of the Subantarctic Front (SAF), Polar Front (PF), and Southern ACC Front. Downstream of this longitude, the SAF progressively meanders northward over the relatively shallow offset PAR segment before channeling through the Eltanin Fracture Zone, thus diverging from the PF which proceeds through the UFZ. Important Note: This submission has been initially submitted to SEA scieNtific Open data Edition (SEANOE) publication service and received the recorded DOI. The metadata elements have been further processed (refined) in EMODnet Ingestion Service in order to conform with the Data Submission Service specifications.
Summary of processing methodology An up-to-date map of the Antarctic Circumpolar Current (ACC) fronts is constructed from the latest version of mean dynamic topography from satellite altimetry (Park et al., 2019, Observations of the Antarctic Circumpolar Current over the Udintsev Fracture Zone, the narrowest choke point in the Southern Ocean, JGR-Oceans, in review). These are derived from the 1/8°-resolution Mean Dynamic Topography (MDT) of Centre National d’Etudes Spatiales-Collect Localisation Satellites 2018 (CNES-CLS18) for the 1993-2012 reference period [Rio et al., The new CNES-CLS18 Mean Dynamic Topography solution, in preparation]. The narrowest ACC width in the Udintsev Fracture Zone (UFZ), with the strongest concentration of the three major ACC fronts within a limited distance as short as 170 km, about 40% narrower than that at Drake Passage. At 144°W, at the entrance of the UFZ, which lies between the Pacific-Antarctic Ridge (PAR) and its eastwardly-offset segment (offset PAR segment), there is a triple confluence of the Subantarctic Front (SAF), Polar Front (PF), and Southern ACC Front. Downstream of this longitude, the SAF progressively meanders northward over the relatively shallow offset PAR segment before channeling through the Eltanin Fracture Zone, thus diverging from the PF which proceeds through the UFZ.
Supporting documentationhttps://www.nature.com/articles/s43247-020-00026-1
Start date1993-01-01
End date2019-12-31

Responsible organisations

CountryFrance
Organisation nameIfremer, Scientific Information Systems for the sea
Role of organisationDataset Holding Organisation
CountryFrance
Organisation nameSEA scieNtific Open data Edition
Role of organisationPublisher

Dataset availability

Original dataset download linkhttps://cloud.emodnet-ingestion.eu/index.php/s/LMmiiw87OpQivHv
Dataset formatNetwork Common Data Form
Public accessNo limitations
License for useCC-BY 4.0
TypeDataset
DOIhttps://doi.org/10.17882/59800

Locations

Map
Latitude north boundary-35
Longitude east boundary180
Latitude south boundary-75
Longitude west boundary-180
Sea areaSouthern Ocean
South Atlantic Ocean
Indian Ocean
South Pacific Ocean
Antarctic freshwater bodies

Data types, collection and processing

Observation typeCurrents
ParameterHorizontal velocity of the water column (currents)
Platform typesatellite
Data quality processing informationProcessed data

Process information

Submitting organisationMuseum National d'Histoire Naturelle, Systematic and evolution department
Submission identifier (UUID)a53ad03f-3539-5393-3938-000000059800
Date of dataset creation2019-04-01
Date of dataset revision2019-11-12
Date of metadata creation2020-1-27
Date of metadata latest revision2021-11-29
Date of publishing2021-12-16
Processing data centreIfremer, Scientific Information Systems for the sea
Summary record-ID972