Impact of the 1997/98 ENSO on upper ocean characteristics in Marguerite Bay, western Antarctic Peninsula
[1] A year-round sequence of hydrographic casts is used to trace the evolution of the upper ocean waters in Marguerite Bay, western Antarctic Peninsula (wAP), between 1998 and 2002. Winter 1998 was anomalous, showing an unusually deep mixed layer that became progressively more saline until spring, r...
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ftciteseerx:oai:CiteSeerX.psu:10.1.1.532.4533 2023-05-15T14:05:12+02:00 Impact of the 1997/98 ENSO on upper ocean characteristics in Marguerite Bay, western Antarctic Peninsula Michael P. Meredith Ian A. Renfrew Andrew Clarke John C. King Mark A. Brandon The Pennsylvania State University CiteSeerX Archives application/pdf http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.532.4533 http://www.uea.ac.uk/~e046/reprints/Meredith_etal_rats_reprint2004.pdf en eng http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.532.4533 http://www.uea.ac.uk/~e046/reprints/Meredith_etal_rats_reprint2004.pdf Metadata may be used without restrictions as long as the oai identifier remains attached to it. http://www.uea.ac.uk/~e046/reprints/Meredith_etal_rats_reprint2004.pdf text ftciteseerx 2016-01-08T10:40:22Z [1] A year-round sequence of hydrographic casts is used to trace the evolution of the upper ocean waters in Marguerite Bay, western Antarctic Peninsula (wAP), between 1998 and 2002. Winter 1998 was anomalous, showing an unusually deep mixed layer that became progressively more saline until spring, reaching salinities as high as 34.0. The remnant of this mixed layer (the Winter Water, WW) was the deepest and most saline observed. Atmospheric and cryospheric conditions were anomalous during winter 1998 at both local and regional scales. Locally, we observed low sea ice concentrations, high air temperatures, and a high frequency of northerly winds. These are the local manifestations of the strong ENSO event of 1997/1998 that was then rapidly weakening. At the regional scale, this ENSO produced significant anomalies in the sea ice distribution throughout the Amundsen-Bellingshausen Sea area, and a large-scale low-pressure anomaly over the southeast Pacific was seen to be responsible for the warm, northerly winds. We use a coupled mixed-layer/ice production model to investigate the ENSO-driven forcings for the anomalous ocean conditions observed in winter 1998. This reveals that ice production is the main control on upper ocean stratification, and that the deep, saline mixed layer in Text Antarc* Antarctic Antarctic Peninsula Bellingshausen Sea Sea ice Unknown Antarctic Antarctic Peninsula Bellingshausen Sea Marguerite ENVELOPE(141.378,141.378,-66.787,-66.787) Marguerite Bay ENVELOPE(-68.000,-68.000,-68.500,-68.500) Pacific |
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English |
description |
[1] A year-round sequence of hydrographic casts is used to trace the evolution of the upper ocean waters in Marguerite Bay, western Antarctic Peninsula (wAP), between 1998 and 2002. Winter 1998 was anomalous, showing an unusually deep mixed layer that became progressively more saline until spring, reaching salinities as high as 34.0. The remnant of this mixed layer (the Winter Water, WW) was the deepest and most saline observed. Atmospheric and cryospheric conditions were anomalous during winter 1998 at both local and regional scales. Locally, we observed low sea ice concentrations, high air temperatures, and a high frequency of northerly winds. These are the local manifestations of the strong ENSO event of 1997/1998 that was then rapidly weakening. At the regional scale, this ENSO produced significant anomalies in the sea ice distribution throughout the Amundsen-Bellingshausen Sea area, and a large-scale low-pressure anomaly over the southeast Pacific was seen to be responsible for the warm, northerly winds. We use a coupled mixed-layer/ice production model to investigate the ENSO-driven forcings for the anomalous ocean conditions observed in winter 1998. This reveals that ice production is the main control on upper ocean stratification, and that the deep, saline mixed layer in |
author2 |
The Pennsylvania State University CiteSeerX Archives |
format |
Text |
author |
Michael P. Meredith Ian A. Renfrew Andrew Clarke John C. King Mark A. Brandon |
spellingShingle |
Michael P. Meredith Ian A. Renfrew Andrew Clarke John C. King Mark A. Brandon Impact of the 1997/98 ENSO on upper ocean characteristics in Marguerite Bay, western Antarctic Peninsula |
author_facet |
Michael P. Meredith Ian A. Renfrew Andrew Clarke John C. King Mark A. Brandon |
author_sort |
Michael P. Meredith |
title |
Impact of the 1997/98 ENSO on upper ocean characteristics in Marguerite Bay, western Antarctic Peninsula |
title_short |
Impact of the 1997/98 ENSO on upper ocean characteristics in Marguerite Bay, western Antarctic Peninsula |
title_full |
Impact of the 1997/98 ENSO on upper ocean characteristics in Marguerite Bay, western Antarctic Peninsula |
title_fullStr |
Impact of the 1997/98 ENSO on upper ocean characteristics in Marguerite Bay, western Antarctic Peninsula |
title_full_unstemmed |
Impact of the 1997/98 ENSO on upper ocean characteristics in Marguerite Bay, western Antarctic Peninsula |
title_sort |
impact of the 1997/98 enso on upper ocean characteristics in marguerite bay, western antarctic peninsula |
url |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.532.4533 http://www.uea.ac.uk/~e046/reprints/Meredith_etal_rats_reprint2004.pdf |
long_lat |
ENVELOPE(141.378,141.378,-66.787,-66.787) ENVELOPE(-68.000,-68.000,-68.500,-68.500) |
geographic |
Antarctic Antarctic Peninsula Bellingshausen Sea Marguerite Marguerite Bay Pacific |
geographic_facet |
Antarctic Antarctic Peninsula Bellingshausen Sea Marguerite Marguerite Bay Pacific |
genre |
Antarc* Antarctic Antarctic Peninsula Bellingshausen Sea Sea ice |
genre_facet |
Antarc* Antarctic Antarctic Peninsula Bellingshausen Sea Sea ice |
op_source |
http://www.uea.ac.uk/~e046/reprints/Meredith_etal_rats_reprint2004.pdf |
op_relation |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.532.4533 http://www.uea.ac.uk/~e046/reprints/Meredith_etal_rats_reprint2004.pdf |
op_rights |
Metadata may be used without restrictions as long as the oai identifier remains attached to it. |
_version_ |
1766276924543336448 |