Understanding Transport Variability of the Antarctic Circumpolar Current Using Ocean Bottom Pressure
Previous studies have suggested that ocean bottom pressure (OBP) can be used to measure the transport variability of the Antarctic Circumpolar Current (ACC). The OBP observations from the Gravity Recovery and Climate Experiment (GRACE) are used to calculate transport along the choke point between An...
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ftunisfloridatam:oai:digitalcommons.usf.edu:etd-6111 2023-06-11T04:06:14+02:00 Understanding Transport Variability of the Antarctic Circumpolar Current Using Ocean Bottom Pressure Makowski, Jessica 2013-01-01T08:00:00Z application/pdf https://digitalcommons.usf.edu/etd/4915 https://digitalcommons.usf.edu/context/etd/article/6111/viewcontent/Makowski_usf_0206M_11997.pdf unknown Digital Commons @ University of South Florida https://digitalcommons.usf.edu/etd/4915 https://digitalcommons.usf.edu/context/etd/article/6111/viewcontent/Makowski_usf_0206M_11997.pdf default USF Tampa Graduate Theses and Dissertations Antarctic Circumpolar Current GRACE Ocean Bottom Pressure Ocean Transport Southern Ocean Oceanography thesis 2013 ftunisfloridatam 2023-05-04T18:04:09Z Previous studies have suggested that ocean bottom pressure (OBP) can be used to measure the transport variability of the Antarctic Circumpolar Current (ACC). The OBP observations from the Gravity Recovery and Climate Experiment (GRACE) are used to calculate transport along the choke point between Antarctica and Australia. Statistical analysis will be conducted to determine the uncertainty of the GRACE observations using a simulated data set. There has been some evidence to suggest that Southern Hemisphere winds and the Southern Annular Mode (SAM) or the Antarctic Oscillation (AAO) play a significant role in accelerating/decelerating ACC transport, along with some contribution from buoyancy forcing. We will examine whether average zonal wind stress, wind stress curl, local zonal winds, or the SAM are representative of the low frequency zonal mass transport variability. Preliminary studies suggest that seasonal variation in transport across the Australia-Antarctica choke point is driven by winds along and north of the northern front of the ACC, the Sub Tropical front (STF). It also appears that interannual variations in transport are related to wind variations centered south of the Sub Antarctic Front (SAF). We have observed a strong negative correlation/positive correlation across the STF of the ACC in the Indian Ocean, which suggests wind stress curl may also be responsible for transport variations. Thesis Antarc* Antarctic Antarctica Southern Ocean Digital Commons University of South Florida (USF) Antarctic Southern Ocean The Antarctic Indian Curl ENVELOPE(-63.071,-63.071,-70.797,-70.797) |
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Open Polar |
collection |
Digital Commons University of South Florida (USF) |
op_collection_id |
ftunisfloridatam |
language |
unknown |
topic |
Antarctic Circumpolar Current GRACE Ocean Bottom Pressure Ocean Transport Southern Ocean Oceanography |
spellingShingle |
Antarctic Circumpolar Current GRACE Ocean Bottom Pressure Ocean Transport Southern Ocean Oceanography Makowski, Jessica Understanding Transport Variability of the Antarctic Circumpolar Current Using Ocean Bottom Pressure |
topic_facet |
Antarctic Circumpolar Current GRACE Ocean Bottom Pressure Ocean Transport Southern Ocean Oceanography |
description |
Previous studies have suggested that ocean bottom pressure (OBP) can be used to measure the transport variability of the Antarctic Circumpolar Current (ACC). The OBP observations from the Gravity Recovery and Climate Experiment (GRACE) are used to calculate transport along the choke point between Antarctica and Australia. Statistical analysis will be conducted to determine the uncertainty of the GRACE observations using a simulated data set. There has been some evidence to suggest that Southern Hemisphere winds and the Southern Annular Mode (SAM) or the Antarctic Oscillation (AAO) play a significant role in accelerating/decelerating ACC transport, along with some contribution from buoyancy forcing. We will examine whether average zonal wind stress, wind stress curl, local zonal winds, or the SAM are representative of the low frequency zonal mass transport variability. Preliminary studies suggest that seasonal variation in transport across the Australia-Antarctica choke point is driven by winds along and north of the northern front of the ACC, the Sub Tropical front (STF). It also appears that interannual variations in transport are related to wind variations centered south of the Sub Antarctic Front (SAF). We have observed a strong negative correlation/positive correlation across the STF of the ACC in the Indian Ocean, which suggests wind stress curl may also be responsible for transport variations. |
format |
Thesis |
author |
Makowski, Jessica |
author_facet |
Makowski, Jessica |
author_sort |
Makowski, Jessica |
title |
Understanding Transport Variability of the Antarctic Circumpolar Current Using Ocean Bottom Pressure |
title_short |
Understanding Transport Variability of the Antarctic Circumpolar Current Using Ocean Bottom Pressure |
title_full |
Understanding Transport Variability of the Antarctic Circumpolar Current Using Ocean Bottom Pressure |
title_fullStr |
Understanding Transport Variability of the Antarctic Circumpolar Current Using Ocean Bottom Pressure |
title_full_unstemmed |
Understanding Transport Variability of the Antarctic Circumpolar Current Using Ocean Bottom Pressure |
title_sort |
understanding transport variability of the antarctic circumpolar current using ocean bottom pressure |
publisher |
Digital Commons @ University of South Florida |
publishDate |
2013 |
url |
https://digitalcommons.usf.edu/etd/4915 https://digitalcommons.usf.edu/context/etd/article/6111/viewcontent/Makowski_usf_0206M_11997.pdf |
long_lat |
ENVELOPE(-63.071,-63.071,-70.797,-70.797) |
geographic |
Antarctic Southern Ocean The Antarctic Indian Curl |
geographic_facet |
Antarctic Southern Ocean The Antarctic Indian Curl |
genre |
Antarc* Antarctic Antarctica Southern Ocean |
genre_facet |
Antarc* Antarctic Antarctica Southern Ocean |
op_source |
USF Tampa Graduate Theses and Dissertations |
op_relation |
https://digitalcommons.usf.edu/etd/4915 https://digitalcommons.usf.edu/context/etd/article/6111/viewcontent/Makowski_usf_0206M_11997.pdf |
op_rights |
default |
_version_ |
1768378067371163648 |