Chemical evidence of the changes of the Antarctic Bottom Water ventilation in the western Ross Sea between 1997 and 2003
Data from three Italian CLIMA project cruises between 1997 and 2003 were used to obtain sections of the hydrographic and chemical properties of the main water masses across the shelf break off Cape Adare (western Ross Sea, Antarctica). Dissolved oxygen, nitrate and phosphate data were combined on th...
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Online Access: | http://hdl.handle.net/11367/27453 https://doi.org/10.1016/j.dsr.2010.03.005 |
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ftuninapoliparth:oai:ricerca.uniparthenope.it:11367/27453 2023-11-12T04:03:38+01:00 Chemical evidence of the changes of the Antarctic Bottom Water ventilation in the western Ross Sea between 1997 and 2003 RIVARO P MASSOLO S BERGAMASCO A CASTAGNO P BUDILLON G Rivaro, P Massolo, S Bergamasco, A Castagno, P Budillon, G 2010 http://hdl.handle.net/11367/27453 https://doi.org/10.1016/j.dsr.2010.03.005 eng eng volume:57 issue:5 firstpage:639 lastpage:652 numberofpages:14 journal:DEEP-SEA RESEARCH PART I-OCEANOGRAPHIC RESEARCH PAPERS http://hdl.handle.net/11367/27453 doi:10.1016/j.dsr.2010.03.005 info:eu-repo/semantics/altIdentifier/scopus/2-s2.0-77951173210 CO2 Ross Sea water masses info:eu-repo/semantics/article 2010 ftuninapoliparth https://doi.org/10.1016/j.dsr.2010.03.005 2023-10-17T21:03:19Z Data from three Italian CLIMA project cruises between 1997 and 2003 were used to obtain sections of the hydrographic and chemical properties of the main water masses across the shelf break off Cape Adare (western Ross Sea, Antarctica). Dissolved oxygen, nitrate and phosphate data were combined on the basis of the Redfield ratio to obtain the quasi-conservative tracers NO (9[NO3]+[O2]), PO (135[PO4]+[O2]) and phosphate star PO4 * (PO4 * = [PO4] + [O2]/175 – 1.95). In 1997 and 2003 the presence of the High Salinity Shelf Water at the bottom depth near the sill was traced by both physical and chemical measurements. In 2001 the Modified Shelf Water, characterized by warmer temperature and by a lower dissolved oxygen content than High Salinity Shelf Water, was observed at the shelf edge. The distribution of the chemical tracers together with the hydrographic observations showed recently formed Antarctic Bottom Water on the continental slope during all of the cruises. These observations were confirmed by the extended Optimum MultiParameter analysis. The calculated thickness of the new Antarctic Bottom Water, as well as the tracer content, were variable in time and in space. The estimated volume of the new Antarctic Bottom Water and the export of dissolved oxygen and nutrient associated with the overflowing water were different over the examined period. In particular, a lower (~ 55%) export was evidenced in 2001 compared to 1997. Article in Journal/Newspaper Antarc* Antarctic Antarctica Ross Sea Università degli Studi di Napoli "Parthenope": CINECA IRIS Adare ENVELOPE(170.233,170.233,-71.283,-71.283) Antarctic Cape Adare ENVELOPE(175.000,175.000,-71.000,-71.000) Ross Sea The Antarctic Deep Sea Research Part I: Oceanographic Research Papers 57 5 639 652 |
institution |
Open Polar |
collection |
Università degli Studi di Napoli "Parthenope": CINECA IRIS |
op_collection_id |
ftuninapoliparth |
language |
English |
topic |
CO2 Ross Sea water masses |
spellingShingle |
CO2 Ross Sea water masses RIVARO P MASSOLO S BERGAMASCO A CASTAGNO P BUDILLON G Chemical evidence of the changes of the Antarctic Bottom Water ventilation in the western Ross Sea between 1997 and 2003 |
topic_facet |
CO2 Ross Sea water masses |
description |
Data from three Italian CLIMA project cruises between 1997 and 2003 were used to obtain sections of the hydrographic and chemical properties of the main water masses across the shelf break off Cape Adare (western Ross Sea, Antarctica). Dissolved oxygen, nitrate and phosphate data were combined on the basis of the Redfield ratio to obtain the quasi-conservative tracers NO (9[NO3]+[O2]), PO (135[PO4]+[O2]) and phosphate star PO4 * (PO4 * = [PO4] + [O2]/175 – 1.95). In 1997 and 2003 the presence of the High Salinity Shelf Water at the bottom depth near the sill was traced by both physical and chemical measurements. In 2001 the Modified Shelf Water, characterized by warmer temperature and by a lower dissolved oxygen content than High Salinity Shelf Water, was observed at the shelf edge. The distribution of the chemical tracers together with the hydrographic observations showed recently formed Antarctic Bottom Water on the continental slope during all of the cruises. These observations were confirmed by the extended Optimum MultiParameter analysis. The calculated thickness of the new Antarctic Bottom Water, as well as the tracer content, were variable in time and in space. The estimated volume of the new Antarctic Bottom Water and the export of dissolved oxygen and nutrient associated with the overflowing water were different over the examined period. In particular, a lower (~ 55%) export was evidenced in 2001 compared to 1997. |
author2 |
Rivaro, P Massolo, S Bergamasco, A Castagno, P Budillon, G |
format |
Article in Journal/Newspaper |
author |
RIVARO P MASSOLO S BERGAMASCO A CASTAGNO P BUDILLON G |
author_facet |
RIVARO P MASSOLO S BERGAMASCO A CASTAGNO P BUDILLON G |
author_sort |
RIVARO P |
title |
Chemical evidence of the changes of the Antarctic Bottom Water ventilation in the western Ross Sea between 1997 and 2003 |
title_short |
Chemical evidence of the changes of the Antarctic Bottom Water ventilation in the western Ross Sea between 1997 and 2003 |
title_full |
Chemical evidence of the changes of the Antarctic Bottom Water ventilation in the western Ross Sea between 1997 and 2003 |
title_fullStr |
Chemical evidence of the changes of the Antarctic Bottom Water ventilation in the western Ross Sea between 1997 and 2003 |
title_full_unstemmed |
Chemical evidence of the changes of the Antarctic Bottom Water ventilation in the western Ross Sea between 1997 and 2003 |
title_sort |
chemical evidence of the changes of the antarctic bottom water ventilation in the western ross sea between 1997 and 2003 |
publishDate |
2010 |
url |
http://hdl.handle.net/11367/27453 https://doi.org/10.1016/j.dsr.2010.03.005 |
long_lat |
ENVELOPE(170.233,170.233,-71.283,-71.283) ENVELOPE(175.000,175.000,-71.000,-71.000) |
geographic |
Adare Antarctic Cape Adare Ross Sea The Antarctic |
geographic_facet |
Adare Antarctic Cape Adare Ross Sea The Antarctic |
genre |
Antarc* Antarctic Antarctica Ross Sea |
genre_facet |
Antarc* Antarctic Antarctica Ross Sea |
op_relation |
volume:57 issue:5 firstpage:639 lastpage:652 numberofpages:14 journal:DEEP-SEA RESEARCH PART I-OCEANOGRAPHIC RESEARCH PAPERS http://hdl.handle.net/11367/27453 doi:10.1016/j.dsr.2010.03.005 info:eu-repo/semantics/altIdentifier/scopus/2-s2.0-77951173210 |
op_doi |
https://doi.org/10.1016/j.dsr.2010.03.005 |
container_title |
Deep Sea Research Part I: Oceanographic Research Papers |
container_volume |
57 |
container_issue |
5 |
container_start_page |
639 |
op_container_end_page |
652 |
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