Normal modes in North Atlantic atmosphere-ocean system and predicting North Atlantic sea surface temperature

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Title Normal modes in North Atlantic atmosphere-ocean system and predicting North Atlantic sea surface temperature
Publication Type thesis
School or College College of Mines & Earth Sciences
Department Atmospheric Sciences
Author Zhao, Bowen
Date 2016
Description We identify an interdecadal oscillatory mode of the North Atlantic atmosphere-ocean system via a Linear Inverse Model (LIM). This mode is shown to be related to the interior pathway propagation of Atlantic Meridional Overturning Circulation (AMOC) anomalies. The oscillation is an ocean-only mode while excited by atmospheric forcing; in particular, it can be approximated as a linearly driven damped oscillator while the North Atlantic Oscillation (NAO) acts as part of the ''external" force. We also show that the influence of NAO-induced surface wind stress forcing quickly damps while the NAO-induced deep flow anomaly, integrating with ocean topography, plays a crucial role in this interdecadal mode. Including such deep ocean dynamics besides surface temperature (SST) significantly improves and prolongs the LIM's prediction skill of SST evolution.
Type Text
Publisher University of Utah
Subject General circulation modes; Normal modes; North Atlantic atmosphere-ocean system; Ocean dynamics; Sea surface temperature
Dissertation Name Master of Science
Language eng
Rights Management ©Bowen Zhao
Format application/pdf
Format Medium application/pdf
Format Extent 3,108,415 bytes
Identifier etd3/id/4281
ARK ark:/87278/s67w9mjp
Setname ir_etd
ID 197826
Reference URL https://collections.lib.utah.edu/ark:/87278/s67w9mjp
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