The Response Of The Northwest Atlantic'S Coupled Slope Water System To The North Atlantic Oscillation: The Beginning Of A New Regime?
The northwest Atlantic's slope waters respond as a coupled system to North Atlantic Oscillation-mediated differences in upstream forcing from the Labrador Current. Hydrographic responses of this Coupled Slope Water System (CSWS) typically result in warmer (colder) and saltier (fresher) slope wa...
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ftcornelluniv:oai:ecommons.cornell.edu:1813/29408 2023-07-30T04:01:53+02:00 The Response Of The Northwest Atlantic'S Coupled Slope Water System To The North Atlantic Oscillation: The Beginning Of A New Regime? Connelly, Matthew Greene, Charles H Harvell, Catherine Drew 2012-01-31 application/pdf https://hdl.handle.net/1813/29408 en_US eng bibid: 7745292 https://hdl.handle.net/1813/29408 Coupled Slope Water System North Atlantic Oscillation Regime Shift dissertation or thesis 2012 ftcornelluniv 2023-07-15T18:34:56Z The northwest Atlantic's slope waters respond as a coupled system to North Atlantic Oscillation-mediated differences in upstream forcing from the Labrador Current. Hydrographic responses of this Coupled Slope Water System (CSWS) typically result in warmer (colder) and saltier (fresher) slope waters during positive (negative) phases of the NAO. A regional slope water temperature (RSWT) index was developed to characterize these changes in slope-water hydrography (MERCINA, 2001). Since the 1970s, the NAO and RSWT indices have been predominantly positive, with occasional NAO phase reversals preceding drops in the RSWT index. Here, an empirical model developed for predicting the RSWT index's response to NAO forcing is explored to determine its recent performance and whether any improvements can be made. The model has performed well for the past decade, and no major improvements appear justified. In 2009, the NAO entered a multi-year period of negative index values, something that has not been observed since the 1960s. We predict that the RSWT index will respond strongly to this negative NAO forcing, resulting in a modal shift in the CSWS similar to that observed in 1998. Changes in remote forcing from the Arctic are hypothesized to be behind the recent changes in NAO behavior. Thesis Arctic North Atlantic North Atlantic oscillation Cornell University: eCommons@Cornell Arctic |
institution |
Open Polar |
collection |
Cornell University: eCommons@Cornell |
op_collection_id |
ftcornelluniv |
language |
English |
topic |
Coupled Slope Water System North Atlantic Oscillation Regime Shift |
spellingShingle |
Coupled Slope Water System North Atlantic Oscillation Regime Shift Connelly, Matthew The Response Of The Northwest Atlantic'S Coupled Slope Water System To The North Atlantic Oscillation: The Beginning Of A New Regime? |
topic_facet |
Coupled Slope Water System North Atlantic Oscillation Regime Shift |
description |
The northwest Atlantic's slope waters respond as a coupled system to North Atlantic Oscillation-mediated differences in upstream forcing from the Labrador Current. Hydrographic responses of this Coupled Slope Water System (CSWS) typically result in warmer (colder) and saltier (fresher) slope waters during positive (negative) phases of the NAO. A regional slope water temperature (RSWT) index was developed to characterize these changes in slope-water hydrography (MERCINA, 2001). Since the 1970s, the NAO and RSWT indices have been predominantly positive, with occasional NAO phase reversals preceding drops in the RSWT index. Here, an empirical model developed for predicting the RSWT index's response to NAO forcing is explored to determine its recent performance and whether any improvements can be made. The model has performed well for the past decade, and no major improvements appear justified. In 2009, the NAO entered a multi-year period of negative index values, something that has not been observed since the 1960s. We predict that the RSWT index will respond strongly to this negative NAO forcing, resulting in a modal shift in the CSWS similar to that observed in 1998. Changes in remote forcing from the Arctic are hypothesized to be behind the recent changes in NAO behavior. |
author2 |
Greene, Charles H Harvell, Catherine Drew |
format |
Thesis |
author |
Connelly, Matthew |
author_facet |
Connelly, Matthew |
author_sort |
Connelly, Matthew |
title |
The Response Of The Northwest Atlantic'S Coupled Slope Water System To The North Atlantic Oscillation: The Beginning Of A New Regime? |
title_short |
The Response Of The Northwest Atlantic'S Coupled Slope Water System To The North Atlantic Oscillation: The Beginning Of A New Regime? |
title_full |
The Response Of The Northwest Atlantic'S Coupled Slope Water System To The North Atlantic Oscillation: The Beginning Of A New Regime? |
title_fullStr |
The Response Of The Northwest Atlantic'S Coupled Slope Water System To The North Atlantic Oscillation: The Beginning Of A New Regime? |
title_full_unstemmed |
The Response Of The Northwest Atlantic'S Coupled Slope Water System To The North Atlantic Oscillation: The Beginning Of A New Regime? |
title_sort |
response of the northwest atlantic's coupled slope water system to the north atlantic oscillation: the beginning of a new regime? |
publishDate |
2012 |
url |
https://hdl.handle.net/1813/29408 |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic North Atlantic North Atlantic oscillation |
genre_facet |
Arctic North Atlantic North Atlantic oscillation |
op_relation |
bibid: 7745292 https://hdl.handle.net/1813/29408 |
_version_ |
1772812629910224896 |