Long-term variability of the southern Adriatic circulation in relation to North Atlantic Oscillation
The interannual variability of the South Adriatic Gyre and its relation to the wind vorticity and the large-scale climatic pattern (North Atlantic Oscillation – NAO) was studied using the time series of satellite altimetric data and ocean surface wind products. The cyclonic circulation observed in t...
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fttriple:oai:gotriple.eu:oai:doaj.org/article:fccc64d7361b4b439c6b08c117f8c18a 2023-05-15T17:31:35+02:00 Long-term variability of the southern Adriatic circulation in relation to North Atlantic Oscillation L. Shabrang M. Menna C. Pizzi H. Lavigne G. Civitarese M. Gačić 2016-02-01 https://doi.org/10.5194/os-12-233-2016 http://www.ocean-sci.net/12/233/2016/os-12-233-2016.pdf https://doaj.org/article/fccc64d7361b4b439c6b08c117f8c18a en eng Copernicus Publications 1812-0784 1812-0792 doi:10.5194/os-12-233-2016 http://www.ocean-sci.net/12/233/2016/os-12-233-2016.pdf https://doaj.org/article/fccc64d7361b4b439c6b08c117f8c18a undefined Ocean Science, Vol 12, Iss 1, Pp 233-241 (2016) envir geo Journal Article https://vocabularies.coar-repositories.org/resource_types/c_6501/ 2016 fttriple https://doi.org/10.5194/os-12-233-2016 2023-01-22T19:28:40Z The interannual variability of the South Adriatic Gyre and its relation to the wind vorticity and the large-scale climatic pattern (North Atlantic Oscillation – NAO) was studied using the time series of satellite altimetric data and ocean surface wind products. The cyclonic circulation observed in the southern Adriatic area was partly sustained by the local wind forcing, as suggested by the positive correlation between the rate of change of the current vorticity and the wind-stress vorticity. Nevertheless, the influence of vorticity advection from the adjacent area (northern Ionian Sea) cannot be ignored and it is more significant during the anticyclonic phase of Adriatic–Ionian Bimodal Oscillation System. The geostrophic current vorticities of the southern Adriatic and northern Ionian seas are correlated with a time lag of 14 months, which approximately corresponds to an advection speed of ∼ 1 cm s−1. The different wind patterns observed during two NAO phases in the winter revealed a stronger positive vorticity during the negative NAO phase. Conversely, during the wintertime positive NAO phase the wind vorticity is characterized by lower positive or slightly negative values. Despite a statistically significant negative correlation between the NAO index and the wind vorticity, no unequivocal relationship between large climatic system and the interannual variability of the South Adriatic Gyre intensity was found due to additional effects of the vorticity advection from the Ionian. This can be explained by the fact that the Ionian circulation mode does not depend on the NAO variations. Therefore, the main result of this study is that the interannual variability of the southern Adriatic cyclonic circulation is a result of the combined influence of the vorticity advection from the Ionian and the local wind-curl effect. Article in Journal/Newspaper North Atlantic North Atlantic oscillation Unknown Curl ENVELOPE(-63.071,-63.071,-70.797,-70.797) Ocean Science 12 1 233 241 |
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English |
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envir geo |
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envir geo L. Shabrang M. Menna C. Pizzi H. Lavigne G. Civitarese M. Gačić Long-term variability of the southern Adriatic circulation in relation to North Atlantic Oscillation |
topic_facet |
envir geo |
description |
The interannual variability of the South Adriatic Gyre and its relation to the wind vorticity and the large-scale climatic pattern (North Atlantic Oscillation – NAO) was studied using the time series of satellite altimetric data and ocean surface wind products. The cyclonic circulation observed in the southern Adriatic area was partly sustained by the local wind forcing, as suggested by the positive correlation between the rate of change of the current vorticity and the wind-stress vorticity. Nevertheless, the influence of vorticity advection from the adjacent area (northern Ionian Sea) cannot be ignored and it is more significant during the anticyclonic phase of Adriatic–Ionian Bimodal Oscillation System. The geostrophic current vorticities of the southern Adriatic and northern Ionian seas are correlated with a time lag of 14 months, which approximately corresponds to an advection speed of ∼ 1 cm s−1. The different wind patterns observed during two NAO phases in the winter revealed a stronger positive vorticity during the negative NAO phase. Conversely, during the wintertime positive NAO phase the wind vorticity is characterized by lower positive or slightly negative values. Despite a statistically significant negative correlation between the NAO index and the wind vorticity, no unequivocal relationship between large climatic system and the interannual variability of the South Adriatic Gyre intensity was found due to additional effects of the vorticity advection from the Ionian. This can be explained by the fact that the Ionian circulation mode does not depend on the NAO variations. Therefore, the main result of this study is that the interannual variability of the southern Adriatic cyclonic circulation is a result of the combined influence of the vorticity advection from the Ionian and the local wind-curl effect. |
format |
Article in Journal/Newspaper |
author |
L. Shabrang M. Menna C. Pizzi H. Lavigne G. Civitarese M. Gačić |
author_facet |
L. Shabrang M. Menna C. Pizzi H. Lavigne G. Civitarese M. Gačić |
author_sort |
L. Shabrang |
title |
Long-term variability of the southern Adriatic circulation in relation to North Atlantic Oscillation |
title_short |
Long-term variability of the southern Adriatic circulation in relation to North Atlantic Oscillation |
title_full |
Long-term variability of the southern Adriatic circulation in relation to North Atlantic Oscillation |
title_fullStr |
Long-term variability of the southern Adriatic circulation in relation to North Atlantic Oscillation |
title_full_unstemmed |
Long-term variability of the southern Adriatic circulation in relation to North Atlantic Oscillation |
title_sort |
long-term variability of the southern adriatic circulation in relation to north atlantic oscillation |
publisher |
Copernicus Publications |
publishDate |
2016 |
url |
https://doi.org/10.5194/os-12-233-2016 http://www.ocean-sci.net/12/233/2016/os-12-233-2016.pdf https://doaj.org/article/fccc64d7361b4b439c6b08c117f8c18a |
long_lat |
ENVELOPE(-63.071,-63.071,-70.797,-70.797) |
geographic |
Curl |
geographic_facet |
Curl |
genre |
North Atlantic North Atlantic oscillation |
genre_facet |
North Atlantic North Atlantic oscillation |
op_source |
Ocean Science, Vol 12, Iss 1, Pp 233-241 (2016) |
op_relation |
1812-0784 1812-0792 doi:10.5194/os-12-233-2016 http://www.ocean-sci.net/12/233/2016/os-12-233-2016.pdf https://doaj.org/article/fccc64d7361b4b439c6b08c117f8c18a |
op_rights |
undefined |
op_doi |
https://doi.org/10.5194/os-12-233-2016 |
container_title |
Ocean Science |
container_volume |
12 |
container_issue |
1 |
container_start_page |
233 |
op_container_end_page |
241 |
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1766129236179943424 |