Position of main ACC fronts south of New Zealand from satellite altimetry and XBT data in the period 1994-2015
A long time series of XBT data collected during Austral summers and satellite altimetry data south of New Zealand are used to identify the positions of the main Antarctic Circumpolar Current (ACC) fronts and their branches from 1994 to 2015. The study area has been investigated since 1994 in the fra...
Published in: | Rendiconti Online della Società Geologica Italiana |
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D. Calcaterra, S. Mazzoli, F.M. Petti, B. Carmina & A. Zuccari
2016
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Online Access: | http://hdl.handle.net/11367/69454 https://doi.org/10.3301/ROL.2016.79 https://rendiconti.socgeol.it/296/issue-67/issue.html |
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ftuninapoliparth:oai:ricerca.uniparthenope.it:11367/69454 2024-01-28T10:00:33+01:00 Position of main ACC fronts south of New Zealand from satellite altimetry and XBT data in the period 1994-2015 Cotroneo Y. Aulicino G. Budillon G. Fusco G. Spezie G. AA.VV. Cotroneo, Y. Aulicino, G. Budillon, G. Fusco, G. Spezie, G. 2016 http://hdl.handle.net/11367/69454 https://doi.org/10.3301/ROL.2016.79 https://rendiconti.socgeol.it/296/issue-67/issue.html eng eng D. Calcaterra, S. Mazzoli, F.M. Petti, B. Carmina & A. Zuccari country:ITA place:Roma ispartofbook:Abstract book 88° Congresso Nazionale della Società Geologica Italiana - Geosciences on a changing planet: learning from the past, exploring the future 88° Congresso Nazionale della Società Geologica Italiana - Geosciences on a changing planet: learning from the past, exploring the future volume:Supplemento 1 a vol. 40 numberofpages:1033 journal:RENDICONTI ONLINE DELLA SOCIETÀ GEOLOGICA ITALIANA http://hdl.handle.net/11367/69454 doi:10.3301/ROL.2016.79 https://rendiconti.socgeol.it/296/issue-67/issue.html info:eu-repo/semantics/conferenceObject 2016 ftuninapoliparth https://doi.org/10.3301/ROL.2016.79 2024-01-03T17:44:18Z A long time series of XBT data collected during Austral summers and satellite altimetry data south of New Zealand are used to identify the positions of the main Antarctic Circumpolar Current (ACC) fronts and their branches from 1994 to 2015. The study area has been investigated since 1994 in the framework of the Climatic Long-term Interaction for the Mass balance in Antarctica (CLIMA), the Southern Ocean Chokepoints Italian Contribution (SOChIC) and the Marine Observatory in the Ross Sea (MORSEA) projects of the Italian National Research Program in Antarctica (PNRA). During these projects, in situ temperature sections of the surface layer (0-800 m) of the Southern Ocean along the track New Zealand-Ross Sea have been occupied almost every summer season by means of XBT. The flow of the ACC is well known to be concentrated in several jets associated with fronts, or regions of strong horizontal gradients in water mass properties and sea surface height. These fronts are linked to particular water mass features, allowing simple criteria based on temperature and salinity to be used to locate them. In this study regional thermal criteria have been used for the detection of ACC fronts from in situ XBT data. The positions of ACC fronts from in situ XBT data agree with existing literature even if a slight increase in the standard deviation during last years is found and the indication of a southward trend in the positions of fronts is shown. Moreover, satellite altimetry data provided by AVISO have been used to identify the positions of the fronts on the basis of specific dynamic height values usually associated to each front as well as through the location on the maximum Absolute Dynamic Topography gradient within a predetermined frontal region. Both altimetry-based methods allowed us to partially fill the gap between consecutive in situ measurements and offered different results. These positions have been compared with those determined from in situ data and finally results from the three identification methods are ... Conference Object Antarc* Antarctic Antarctica Ross Sea Southern Ocean Università degli Studi di Napoli "Parthenope": CINECA IRIS Antarctic Austral New Zealand Ross Sea Southern Ocean Rendiconti Online della Società Geologica Italiana 40 |
institution |
Open Polar |
collection |
Università degli Studi di Napoli "Parthenope": CINECA IRIS |
op_collection_id |
ftuninapoliparth |
language |
English |
description |
A long time series of XBT data collected during Austral summers and satellite altimetry data south of New Zealand are used to identify the positions of the main Antarctic Circumpolar Current (ACC) fronts and their branches from 1994 to 2015. The study area has been investigated since 1994 in the framework of the Climatic Long-term Interaction for the Mass balance in Antarctica (CLIMA), the Southern Ocean Chokepoints Italian Contribution (SOChIC) and the Marine Observatory in the Ross Sea (MORSEA) projects of the Italian National Research Program in Antarctica (PNRA). During these projects, in situ temperature sections of the surface layer (0-800 m) of the Southern Ocean along the track New Zealand-Ross Sea have been occupied almost every summer season by means of XBT. The flow of the ACC is well known to be concentrated in several jets associated with fronts, or regions of strong horizontal gradients in water mass properties and sea surface height. These fronts are linked to particular water mass features, allowing simple criteria based on temperature and salinity to be used to locate them. In this study regional thermal criteria have been used for the detection of ACC fronts from in situ XBT data. The positions of ACC fronts from in situ XBT data agree with existing literature even if a slight increase in the standard deviation during last years is found and the indication of a southward trend in the positions of fronts is shown. Moreover, satellite altimetry data provided by AVISO have been used to identify the positions of the fronts on the basis of specific dynamic height values usually associated to each front as well as through the location on the maximum Absolute Dynamic Topography gradient within a predetermined frontal region. Both altimetry-based methods allowed us to partially fill the gap between consecutive in situ measurements and offered different results. These positions have been compared with those determined from in situ data and finally results from the three identification methods are ... |
author2 |
AA.VV. Cotroneo, Y. Aulicino, G. Budillon, G. Fusco, G. Spezie, G. |
format |
Conference Object |
author |
Cotroneo Y. Aulicino G. Budillon G. Fusco G. Spezie G. |
spellingShingle |
Cotroneo Y. Aulicino G. Budillon G. Fusco G. Spezie G. Position of main ACC fronts south of New Zealand from satellite altimetry and XBT data in the period 1994-2015 |
author_facet |
Cotroneo Y. Aulicino G. Budillon G. Fusco G. Spezie G. |
author_sort |
Cotroneo Y. |
title |
Position of main ACC fronts south of New Zealand from satellite altimetry and XBT data in the period 1994-2015 |
title_short |
Position of main ACC fronts south of New Zealand from satellite altimetry and XBT data in the period 1994-2015 |
title_full |
Position of main ACC fronts south of New Zealand from satellite altimetry and XBT data in the period 1994-2015 |
title_fullStr |
Position of main ACC fronts south of New Zealand from satellite altimetry and XBT data in the period 1994-2015 |
title_full_unstemmed |
Position of main ACC fronts south of New Zealand from satellite altimetry and XBT data in the period 1994-2015 |
title_sort |
position of main acc fronts south of new zealand from satellite altimetry and xbt data in the period 1994-2015 |
publisher |
D. Calcaterra, S. Mazzoli, F.M. Petti, B. Carmina & A. Zuccari |
publishDate |
2016 |
url |
http://hdl.handle.net/11367/69454 https://doi.org/10.3301/ROL.2016.79 https://rendiconti.socgeol.it/296/issue-67/issue.html |
geographic |
Antarctic Austral New Zealand Ross Sea Southern Ocean |
geographic_facet |
Antarctic Austral New Zealand Ross Sea Southern Ocean |
genre |
Antarc* Antarctic Antarctica Ross Sea Southern Ocean |
genre_facet |
Antarc* Antarctic Antarctica Ross Sea Southern Ocean |
op_relation |
ispartofbook:Abstract book 88° Congresso Nazionale della Società Geologica Italiana - Geosciences on a changing planet: learning from the past, exploring the future 88° Congresso Nazionale della Società Geologica Italiana - Geosciences on a changing planet: learning from the past, exploring the future volume:Supplemento 1 a vol. 40 numberofpages:1033 journal:RENDICONTI ONLINE DELLA SOCIETÀ GEOLOGICA ITALIANA http://hdl.handle.net/11367/69454 doi:10.3301/ROL.2016.79 https://rendiconti.socgeol.it/296/issue-67/issue.html |
op_doi |
https://doi.org/10.3301/ROL.2016.79 |
container_title |
Rendiconti Online della Società Geologica Italiana |
container_volume |
40 |
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1789324996493967360 |