Vertical Structure of Propagating Features
Vertical Structure of Propagating Features
The inter- and intra-annual variability of the western boundary North Atlantic 26.5 ?N region has been central in the observations of the strength and structure of the Atlantic Meridional Overturning Circulation (AMOC). Interest in this work began when some recent work estimated the inter-annual fluctuations of the AMOC at 26.5 ?N to be
up to 3 Sv, and with a 25% reduction in strength over the last 50 years. There was increased need to understand both the short and long-term changes in the region and the responsible mechanisms for its variability. With the unique use of RAPID-MOC and MOCHA transatlantic mooring array in combination with satellite altimetry and transatlantic hydrographic observations, we find evidence that a significant amount of the variability can be accounted for by various mechanisms on different time-space scales including propagating features. Here we present simultaneous assimilation of surface and sub-surface observations that shows fresh insights into the contribution of the propagating features in the vertical structure of the temporal-spatial evolution in the western boundary 26.5 ?N Atlantic. There is great prospect in using altimetry observations to reflect and infer the variability throughout the water-column - an effort vital in future interpretations of the AMOC fluctuations using altimetry and numerical models.
Mujahid, Aazani
b58c7ad6-0e37-4706-8f09-66899c5efa3a
June 2010
Mujahid, Aazani
b58c7ad6-0e37-4706-8f09-66899c5efa3a
Bryden, Harry
7f823946-34e8-48a3-8bd4-a72d2d749184
Mujahid, Aazani
(2010)
Vertical Structure of Propagating Features.
University of Southampton, School of Ocean and Earth Science, Doctoral Thesis, 147pp.
Record type:
Thesis
(Doctoral)
Abstract
The inter- and intra-annual variability of the western boundary North Atlantic 26.5 ?N region has been central in the observations of the strength and structure of the Atlantic Meridional Overturning Circulation (AMOC). Interest in this work began when some recent work estimated the inter-annual fluctuations of the AMOC at 26.5 ?N to be
up to 3 Sv, and with a 25% reduction in strength over the last 50 years. There was increased need to understand both the short and long-term changes in the region and the responsible mechanisms for its variability. With the unique use of RAPID-MOC and MOCHA transatlantic mooring array in combination with satellite altimetry and transatlantic hydrographic observations, we find evidence that a significant amount of the variability can be accounted for by various mechanisms on different time-space scales including propagating features. Here we present simultaneous assimilation of surface and sub-surface observations that shows fresh insights into the contribution of the propagating features in the vertical structure of the temporal-spatial evolution in the western boundary 26.5 ?N Atlantic. There is great prospect in using altimetry observations to reflect and infer the variability throughout the water-column - an effort vital in future interpretations of the AMOC fluctuations using altimetry and numerical models.
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MUJAHID_PhD_2010.pdf
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Published date: June 2010
Organisations:
University of Southampton, Physical Oceanography
Identifiers
Local EPrints ID: 209541
URI: http://eprints.soton.ac.uk/id/eprint/209541
PURE UUID: 0aba38d5-5ff8-4d30-a210-f9e943ae351c
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Date deposited: 30 Jan 2012 14:58
Last modified: 15 Mar 2024 02:52
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Author:
Aazani Mujahid
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