Wind-induced, cross-frontal exchange on Georges Bank : a mechanism for early summer on-bank biological particle transport
Author Posting. © American Geophysical Union, 2003. This article is posted here by permission of American Geophysical Union for personal use, not for redistribution. The definitive version was published in Journal of Geophysical Research 108, C11 (2003): 8011, doi:10.1029/2002JC001358. Water exchang...
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ftwhoas:oai:darchive.mblwhoilibrary.org:1912/3511 2023-05-15T17:45:47+02:00 Wind-induced, cross-frontal exchange on Georges Bank : a mechanism for early summer on-bank biological particle transport Chen, Changsheng Schlitz, Ronald J. Lough, R. Gregory Smith, Keston W. Beardsley, Robert C. Manning, James P. 2003-11-29 application/pdf https://hdl.handle.net/1912/3511 en_US eng American Geophysical Union https://doi.org/10.1029/2002JC001358 Journal of Geophysical Research 108, C11 (2003): 8011 https://hdl.handle.net/1912/3511 Journal of Geophysical Research 108, C11 (2003): 8011 Cross-frontal exchange Tidal mixing front Wind-driven currents Article 2003 ftwhoas https://doi.org/10.1029/2002JC001358 2022-05-28T22:58:00Z Author Posting. © American Geophysical Union, 2003. This article is posted here by permission of American Geophysical Union for personal use, not for redistribution. The definitive version was published in Journal of Geophysical Research 108, C11 (2003): 8011, doi:10.1029/2002JC001358. Water exchange across the tidal-mixing front on the southern flank of Georges Bank (GB) is examined using a two-dimensional (2D) primitive equation ocean model. The model domain features a cross-frontal transect including a June 1999 hydrographic (CTD)/ADCP study made as part of the U.S. GLOBEC Northwest Atlantic/Georges Bank program. The model was initialized with temperature and salinity fields taken on the 15 June 1999 CTD section and run prognostically with tidal forcing, measured winds, and representative surface heat flux. The results show that fluctuations of wind plus tidal mixing can play the following essential role in the short-term transport of water and particles from the stratified region to the mixed region on GB in early summer, when stratification is just developing with a weak thermocline at a depth of about 10 m. First, a passing weather front drives a wind-induced on-bank Ekman transport of the upper part of the water column at the tidal-mixing front and associated particles in the surface mixed layer. Then, when the wind relaxes or changes direction, the water in the on-bank extension of the front (above the thermocline) mixes quickly through enhanced tidal motion in shallower depths of water. As a result, particles that are advected along the extended front stay in the previously well-mixed region of the bank. Surface heating tends to increase the strength of the thermocline and reduce the thickness of the surface mixed layer. This in turn accelerates the on-bank movement of the front under an easterly wind favorable for Ekman transport and thus enhances the on-bank, cross-frontal transport of particles. Since the wind-induced, cross-frontal on-bank transport of water can occur episodically during passages ... Article in Journal/Newspaper Northwest Atlantic Woods Hole Scientific Community: WHOAS (Woods Hole Open Access Server) Journal of Geophysical Research 108 C11 |
institution |
Open Polar |
collection |
Woods Hole Scientific Community: WHOAS (Woods Hole Open Access Server) |
op_collection_id |
ftwhoas |
language |
English |
topic |
Cross-frontal exchange Tidal mixing front Wind-driven currents |
spellingShingle |
Cross-frontal exchange Tidal mixing front Wind-driven currents Chen, Changsheng Schlitz, Ronald J. Lough, R. Gregory Smith, Keston W. Beardsley, Robert C. Manning, James P. Wind-induced, cross-frontal exchange on Georges Bank : a mechanism for early summer on-bank biological particle transport |
topic_facet |
Cross-frontal exchange Tidal mixing front Wind-driven currents |
description |
Author Posting. © American Geophysical Union, 2003. This article is posted here by permission of American Geophysical Union for personal use, not for redistribution. The definitive version was published in Journal of Geophysical Research 108, C11 (2003): 8011, doi:10.1029/2002JC001358. Water exchange across the tidal-mixing front on the southern flank of Georges Bank (GB) is examined using a two-dimensional (2D) primitive equation ocean model. The model domain features a cross-frontal transect including a June 1999 hydrographic (CTD)/ADCP study made as part of the U.S. GLOBEC Northwest Atlantic/Georges Bank program. The model was initialized with temperature and salinity fields taken on the 15 June 1999 CTD section and run prognostically with tidal forcing, measured winds, and representative surface heat flux. The results show that fluctuations of wind plus tidal mixing can play the following essential role in the short-term transport of water and particles from the stratified region to the mixed region on GB in early summer, when stratification is just developing with a weak thermocline at a depth of about 10 m. First, a passing weather front drives a wind-induced on-bank Ekman transport of the upper part of the water column at the tidal-mixing front and associated particles in the surface mixed layer. Then, when the wind relaxes or changes direction, the water in the on-bank extension of the front (above the thermocline) mixes quickly through enhanced tidal motion in shallower depths of water. As a result, particles that are advected along the extended front stay in the previously well-mixed region of the bank. Surface heating tends to increase the strength of the thermocline and reduce the thickness of the surface mixed layer. This in turn accelerates the on-bank movement of the front under an easterly wind favorable for Ekman transport and thus enhances the on-bank, cross-frontal transport of particles. Since the wind-induced, cross-frontal on-bank transport of water can occur episodically during passages ... |
format |
Article in Journal/Newspaper |
author |
Chen, Changsheng Schlitz, Ronald J. Lough, R. Gregory Smith, Keston W. Beardsley, Robert C. Manning, James P. |
author_facet |
Chen, Changsheng Schlitz, Ronald J. Lough, R. Gregory Smith, Keston W. Beardsley, Robert C. Manning, James P. |
author_sort |
Chen, Changsheng |
title |
Wind-induced, cross-frontal exchange on Georges Bank : a mechanism for early summer on-bank biological particle transport |
title_short |
Wind-induced, cross-frontal exchange on Georges Bank : a mechanism for early summer on-bank biological particle transport |
title_full |
Wind-induced, cross-frontal exchange on Georges Bank : a mechanism for early summer on-bank biological particle transport |
title_fullStr |
Wind-induced, cross-frontal exchange on Georges Bank : a mechanism for early summer on-bank biological particle transport |
title_full_unstemmed |
Wind-induced, cross-frontal exchange on Georges Bank : a mechanism for early summer on-bank biological particle transport |
title_sort |
wind-induced, cross-frontal exchange on georges bank : a mechanism for early summer on-bank biological particle transport |
publisher |
American Geophysical Union |
publishDate |
2003 |
url |
https://hdl.handle.net/1912/3511 |
genre |
Northwest Atlantic |
genre_facet |
Northwest Atlantic |
op_source |
Journal of Geophysical Research 108, C11 (2003): 8011 |
op_relation |
https://doi.org/10.1029/2002JC001358 Journal of Geophysical Research 108, C11 (2003): 8011 https://hdl.handle.net/1912/3511 |
op_doi |
https://doi.org/10.1029/2002JC001358 |
container_title |
Journal of Geophysical Research |
container_volume |
108 |
container_issue |
C11 |
_version_ |
1766149039476178944 |