Coherence of western boundary pressure at the RAPID WAVE Array : boundary wave adjustments or Deep Western Boundary Current advection?
Author Posting. © American Meteorological Society, 2013. This article is posted here by permission of American Meteorological Society for personal use, not for redistribution. The definitive version was published in Journal of Physical Oceanography 43 (2013): 744–765, doi:10.1175/JPO-D-12-067.1. Thi...
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ftwhoas:oai:darchive.mblwhoilibrary.org:1912/5921 2023-05-15T17:36:48+02:00 Coherence of western boundary pressure at the RAPID WAVE Array : boundary wave adjustments or Deep Western Boundary Current advection? Elipot, Shane Hughes, Chris W. Olhede, Sofia Toole, John M. 2013-04 application/pdf https://hdl.handle.net/1912/5921 en_US eng American Meteorological Society https://doi.org/10.1175/JPO-D-12-067.1 Journal of Physical Oceanography 43 (2013): 744–765 https://hdl.handle.net/1912/5921 doi:10.1175/JPO-D-12-067.1 Journal of Physical Oceanography 43 (2013): 744–765 doi:10.1175/JPO-D-12-067.1 Atlantic Ocean Boundary currents Meridional overturning circulation Pressure Waves oceanic In situ oceanic observations Article 2013 ftwhoas https://doi.org/10.1175/JPO-D-12-067.1 2022-05-28T22:58:49Z Author Posting. © American Meteorological Society, 2013. This article is posted here by permission of American Meteorological Society for personal use, not for redistribution. The definitive version was published in Journal of Physical Oceanography 43 (2013): 744–765, doi:10.1175/JPO-D-12-067.1. This study investigates the coherence between ocean bottom pressure signals at the Rapid Climate Change programme (RAPID) West Atlantic Variability Experiment (WAVE) array on the western North Atlantic continental slope, including the Woods Hole Oceanographic Institution Line W. Highly coherent pressure signals propagate southwestward along the slope, at speeds in excess of 128 m s−1, consistent with expectations of barotropic Kelvin-like waves. Coherent signals are also evidenced in the smaller pressure differences relative to 1000-m depth, which are expected to be associated with depth-dependent basinwide meridional transport variations or an overturning circulation. These signals are coherent and almost in phase for all time scales from 3.6 years down to 3 months. Coherence is still seen at shorter time scales for which group delay estimates are consistent with a propagation speed of about 1 m s−1 over 990 km of continental slope but with large error bounds on the speed. This is roughly consistent with expectations for propagation of coastally trapped waves, though somewhat slower than expected. A comparison with both Eulerian currents and Lagrangian float measurements shows that the coherence is inconsistent with a propagation of signals by advection, except possibly on time scales longer than 6 months. This work was funded by the U.K. Natural Environment Research Council. Sofia Olhede was supported by EPSRC Grant EP/I005250/1. Initial observations at StationW(2001–04) were made possible by a grant from the G. Unger Vetlesen Foundation and support from the Woods Hole Oceanographic Institution. Since 2004, the Line W program has been supported by the U.S. National Science Foundation with supplemental contribution ... Article in Journal/Newspaper North Atlantic Woods Hole Scientific Community: WHOAS (Woods Hole Open Access Server) Journal of Physical Oceanography 43 4 744 765 |
institution |
Open Polar |
collection |
Woods Hole Scientific Community: WHOAS (Woods Hole Open Access Server) |
op_collection_id |
ftwhoas |
language |
English |
topic |
Atlantic Ocean Boundary currents Meridional overturning circulation Pressure Waves oceanic In situ oceanic observations |
spellingShingle |
Atlantic Ocean Boundary currents Meridional overturning circulation Pressure Waves oceanic In situ oceanic observations Elipot, Shane Hughes, Chris W. Olhede, Sofia Toole, John M. Coherence of western boundary pressure at the RAPID WAVE Array : boundary wave adjustments or Deep Western Boundary Current advection? |
topic_facet |
Atlantic Ocean Boundary currents Meridional overturning circulation Pressure Waves oceanic In situ oceanic observations |
description |
Author Posting. © American Meteorological Society, 2013. This article is posted here by permission of American Meteorological Society for personal use, not for redistribution. The definitive version was published in Journal of Physical Oceanography 43 (2013): 744–765, doi:10.1175/JPO-D-12-067.1. This study investigates the coherence between ocean bottom pressure signals at the Rapid Climate Change programme (RAPID) West Atlantic Variability Experiment (WAVE) array on the western North Atlantic continental slope, including the Woods Hole Oceanographic Institution Line W. Highly coherent pressure signals propagate southwestward along the slope, at speeds in excess of 128 m s−1, consistent with expectations of barotropic Kelvin-like waves. Coherent signals are also evidenced in the smaller pressure differences relative to 1000-m depth, which are expected to be associated with depth-dependent basinwide meridional transport variations or an overturning circulation. These signals are coherent and almost in phase for all time scales from 3.6 years down to 3 months. Coherence is still seen at shorter time scales for which group delay estimates are consistent with a propagation speed of about 1 m s−1 over 990 km of continental slope but with large error bounds on the speed. This is roughly consistent with expectations for propagation of coastally trapped waves, though somewhat slower than expected. A comparison with both Eulerian currents and Lagrangian float measurements shows that the coherence is inconsistent with a propagation of signals by advection, except possibly on time scales longer than 6 months. This work was funded by the U.K. Natural Environment Research Council. Sofia Olhede was supported by EPSRC Grant EP/I005250/1. Initial observations at StationW(2001–04) were made possible by a grant from the G. Unger Vetlesen Foundation and support from the Woods Hole Oceanographic Institution. Since 2004, the Line W program has been supported by the U.S. National Science Foundation with supplemental contribution ... |
format |
Article in Journal/Newspaper |
author |
Elipot, Shane Hughes, Chris W. Olhede, Sofia Toole, John M. |
author_facet |
Elipot, Shane Hughes, Chris W. Olhede, Sofia Toole, John M. |
author_sort |
Elipot, Shane |
title |
Coherence of western boundary pressure at the RAPID WAVE Array : boundary wave adjustments or Deep Western Boundary Current advection? |
title_short |
Coherence of western boundary pressure at the RAPID WAVE Array : boundary wave adjustments or Deep Western Boundary Current advection? |
title_full |
Coherence of western boundary pressure at the RAPID WAVE Array : boundary wave adjustments or Deep Western Boundary Current advection? |
title_fullStr |
Coherence of western boundary pressure at the RAPID WAVE Array : boundary wave adjustments or Deep Western Boundary Current advection? |
title_full_unstemmed |
Coherence of western boundary pressure at the RAPID WAVE Array : boundary wave adjustments or Deep Western Boundary Current advection? |
title_sort |
coherence of western boundary pressure at the rapid wave array : boundary wave adjustments or deep western boundary current advection? |
publisher |
American Meteorological Society |
publishDate |
2013 |
url |
https://hdl.handle.net/1912/5921 |
genre |
North Atlantic |
genre_facet |
North Atlantic |
op_source |
Journal of Physical Oceanography 43 (2013): 744–765 doi:10.1175/JPO-D-12-067.1 |
op_relation |
https://doi.org/10.1175/JPO-D-12-067.1 Journal of Physical Oceanography 43 (2013): 744–765 https://hdl.handle.net/1912/5921 doi:10.1175/JPO-D-12-067.1 |
op_doi |
https://doi.org/10.1175/JPO-D-12-067.1 |
container_title |
Journal of Physical Oceanography |
container_volume |
43 |
container_issue |
4 |
container_start_page |
744 |
op_container_end_page |
765 |
_version_ |
1766136397443366912 |