Joint effects of wind and ice motion in forcing upwelling in Mackenzie Trough, Beaufort Sea
Mackenzie Trough, a cross shelf canyon in the Beaufort Sea shelf, is shown to be a site of enhanced shelf-break exchange via upwelling caused by wind- and ice-driven ocean surface-stresses. To characterize flow within the Trough, we analyze current meter mooring data and concurrent wind and ice velo...
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| Veröffentlicht in: | Continental shelf research 2006-12, Vol.26 (19), p.2352-2366 |
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| creator | Williams, William J. Carmack, Eddy C. Shimada, Koji Melling, Humfrey Aagaard, Knut Macdonald, Robie W. Grant Ingram, R. |
| description | Mackenzie Trough, a cross shelf canyon in the Beaufort Sea shelf, is shown to be a site of enhanced shelf-break exchange via upwelling caused by wind- and ice-driven ocean surface-stresses. To characterize flow within the Trough, we analyze current meter mooring data and concurrent wind and ice velocity data from 1993 to 1996, and show CTD/ADCP sections from 2002. Mackenzie Trough is approximately 400
m deep and 60
km wide, but dynamically it is only 2–3 times the baroclinic Rossby radius at its mouth, and patterns of upwelling and downwelling flow within the canyon are similar to dynamically ‘narrow’ canyons. Large upwelling events within the canyon are associated with wind in the short ice-free summer season and with ice motion in winter. Ice motion does not necessarily reflect the wind-stress because of internal ice stresses that differentially block downwelling-causing ice motion. The asymmetry between upwelling and downwelling flow within the canyon combined with the predominance of upwelling-causing ice motion, suggests that Mackenzie Trough is a conduit for deeper, nutrient-rich water to the shelf. |
| doi_str_mv | 10.1016/j.csr.2006.06.012 |
| format | Article |
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m deep and 60
km wide, but dynamically it is only 2–3 times the baroclinic Rossby radius at its mouth, and patterns of upwelling and downwelling flow within the canyon are similar to dynamically ‘narrow’ canyons. Large upwelling events within the canyon are associated with wind in the short ice-free summer season and with ice motion in winter. Ice motion does not necessarily reflect the wind-stress because of internal ice stresses that differentially block downwelling-causing ice motion. The asymmetry between upwelling and downwelling flow within the canyon combined with the predominance of upwelling-causing ice motion, suggests that Mackenzie Trough is a conduit for deeper, nutrient-rich water to the shelf.</description><identifier>ISSN: 0278-4343</identifier><identifier>EISSN: 1873-6955</identifier><identifier>DOI: 10.1016/j.csr.2006.06.012</identifier><language>eng</language><publisher>Elsevier Ltd</publisher><subject>69–73°N 128–144°W ; Beaufort Sea ; Canyon upwelling ; Marine ; Sea-ice ; Shelf circulation ; Wind-stress</subject><ispartof>Continental shelf research, 2006-12, Vol.26 (19), p.2352-2366</ispartof><rights>2006 Elsevier Ltd</rights><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c328t-a44d032067c8e409c02082a60e5a97e0e03fa938cf43f29460cb0d5f94b7a1c43</citedby><cites>FETCH-LOGICAL-c328t-a44d032067c8e409c02082a60e5a97e0e03fa938cf43f29460cb0d5f94b7a1c43</cites></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktohtml>$$Uhttps://dx.doi.org/10.1016/j.csr.2006.06.012$$EHTML$$P50$$Gelsevier$$H</linktohtml><link.rule.ids>314,780,784,3548,27923,27924,45994</link.rule.ids></links><search><creatorcontrib>Williams, William J.</creatorcontrib><creatorcontrib>Carmack, Eddy C.</creatorcontrib><creatorcontrib>Shimada, Koji</creatorcontrib><creatorcontrib>Melling, Humfrey</creatorcontrib><creatorcontrib>Aagaard, Knut</creatorcontrib><creatorcontrib>Macdonald, Robie W.</creatorcontrib><creatorcontrib>Grant Ingram, R.</creatorcontrib><title>Joint effects of wind and ice motion in forcing upwelling in Mackenzie Trough, Beaufort Sea</title><title>Continental shelf research</title><description>Mackenzie Trough, a cross shelf canyon in the Beaufort Sea shelf, is shown to be a site of enhanced shelf-break exchange via upwelling caused by wind- and ice-driven ocean surface-stresses. To characterize flow within the Trough, we analyze current meter mooring data and concurrent wind and ice velocity data from 1993 to 1996, and show CTD/ADCP sections from 2002. Mackenzie Trough is approximately 400
m deep and 60
km wide, but dynamically it is only 2–3 times the baroclinic Rossby radius at its mouth, and patterns of upwelling and downwelling flow within the canyon are similar to dynamically ‘narrow’ canyons. Large upwelling events within the canyon are associated with wind in the short ice-free summer season and with ice motion in winter. Ice motion does not necessarily reflect the wind-stress because of internal ice stresses that differentially block downwelling-causing ice motion. The asymmetry between upwelling and downwelling flow within the canyon combined with the predominance of upwelling-causing ice motion, suggests that Mackenzie Trough is a conduit for deeper, nutrient-rich water to the shelf.</description><subject>69–73°N 128–144°W</subject><subject>Beaufort Sea</subject><subject>Canyon upwelling</subject><subject>Marine</subject><subject>Sea-ice</subject><subject>Shelf circulation</subject><subject>Wind-stress</subject><issn>0278-4343</issn><issn>1873-6955</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2006</creationdate><recordtype>article</recordtype><recordid>eNp9kE1PwzAMhiMEEuPjB3DLiRMtzkfbVJxg4lNDHBgnDlFIHcjYmpG0IPj1tBpnJFu2rPe17IeQIwY5A1aeLnKbYs4BynwMxrfIhKlKZGVdFNtkArxSmRRS7JK9lBYAUJV1NSHPd8G3HUXn0HaJBke_fNtQM6S3SFeh86GlvqUuROvbV9qvv3C5HLtheG_sO7Y_Huk8hv717YReoOkHaUcf0RyQHWeWCQ__6j55urqcT2-y2cP17fR8llnBVZcZKRsQHMrKKpRQW-CguCkBC1NXCAjCmVoo66RwvJYl2BdoClfLl8owK8U-Od7sXcfw0WPq9MonO1xpWgx90hxqpQrFByHbCG0MKUV0eh39ysRvzUCPGPVCDxj1iFGPwUbP2caDwwefHqNO1mNrsfFxQKab4P9x_wK1DHpr</recordid><startdate>20061201</startdate><enddate>20061201</enddate><creator>Williams, William J.</creator><creator>Carmack, Eddy C.</creator><creator>Shimada, Koji</creator><creator>Melling, Humfrey</creator><creator>Aagaard, Knut</creator><creator>Macdonald, Robie W.</creator><creator>Grant Ingram, R.</creator><general>Elsevier Ltd</general><scope>AAYXX</scope><scope>CITATION</scope><scope>7TG</scope><scope>7TN</scope><scope>F1W</scope><scope>H96</scope><scope>KL.</scope><scope>L.G</scope></search><sort><creationdate>20061201</creationdate><title>Joint effects of wind and ice motion in forcing upwelling in Mackenzie Trough, Beaufort Sea</title><author>Williams, William J. ; Carmack, Eddy C. ; Shimada, Koji ; Melling, Humfrey ; Aagaard, Knut ; Macdonald, Robie W. ; Grant Ingram, R.</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c328t-a44d032067c8e409c02082a60e5a97e0e03fa938cf43f29460cb0d5f94b7a1c43</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2006</creationdate><topic>69–73°N 128–144°W</topic><topic>Beaufort Sea</topic><topic>Canyon upwelling</topic><topic>Marine</topic><topic>Sea-ice</topic><topic>Shelf circulation</topic><topic>Wind-stress</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Williams, William J.</creatorcontrib><creatorcontrib>Carmack, Eddy C.</creatorcontrib><creatorcontrib>Shimada, Koji</creatorcontrib><creatorcontrib>Melling, Humfrey</creatorcontrib><creatorcontrib>Aagaard, Knut</creatorcontrib><creatorcontrib>Macdonald, Robie W.</creatorcontrib><creatorcontrib>Grant Ingram, R.</creatorcontrib><collection>CrossRef</collection><collection>Meteorological & Geoastrophysical Abstracts</collection><collection>Oceanic Abstracts</collection><collection>ASFA: Aquatic Sciences and Fisheries Abstracts</collection><collection>Aquatic Science & Fisheries Abstracts (ASFA) 2: Ocean Technology, Policy & Non-Living Resources</collection><collection>Meteorological & Geoastrophysical Abstracts - Academic</collection><collection>Aquatic Science & Fisheries Abstracts (ASFA) Professional</collection><jtitle>Continental shelf research</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Williams, William J.</au><au>Carmack, Eddy C.</au><au>Shimada, Koji</au><au>Melling, Humfrey</au><au>Aagaard, Knut</au><au>Macdonald, Robie W.</au><au>Grant Ingram, R.</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Joint effects of wind and ice motion in forcing upwelling in Mackenzie Trough, Beaufort Sea</atitle><jtitle>Continental shelf research</jtitle><date>2006-12-01</date><risdate>2006</risdate><volume>26</volume><issue>19</issue><spage>2352</spage><epage>2366</epage><pages>2352-2366</pages><issn>0278-4343</issn><eissn>1873-6955</eissn><abstract>Mackenzie Trough, a cross shelf canyon in the Beaufort Sea shelf, is shown to be a site of enhanced shelf-break exchange via upwelling caused by wind- and ice-driven ocean surface-stresses. To characterize flow within the Trough, we analyze current meter mooring data and concurrent wind and ice velocity data from 1993 to 1996, and show CTD/ADCP sections from 2002. Mackenzie Trough is approximately 400
m deep and 60
km wide, but dynamically it is only 2–3 times the baroclinic Rossby radius at its mouth, and patterns of upwelling and downwelling flow within the canyon are similar to dynamically ‘narrow’ canyons. Large upwelling events within the canyon are associated with wind in the short ice-free summer season and with ice motion in winter. Ice motion does not necessarily reflect the wind-stress because of internal ice stresses that differentially block downwelling-causing ice motion. The asymmetry between upwelling and downwelling flow within the canyon combined with the predominance of upwelling-causing ice motion, suggests that Mackenzie Trough is a conduit for deeper, nutrient-rich water to the shelf.</abstract><pub>Elsevier Ltd</pub><doi>10.1016/j.csr.2006.06.012</doi><tpages>15</tpages></addata></record> |
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| ispartof | Continental shelf research, 2006-12, Vol.26 (19), p.2352-2366 |
| issn | 0278-4343 1873-6955 |
| language | eng |
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| source | ScienceDirect Journals (5 years ago - present) |
| subjects | 69–73°N 128–144°W Beaufort Sea Canyon upwelling Marine Sea-ice Shelf circulation Wind-stress |
| title | Joint effects of wind and ice motion in forcing upwelling in Mackenzie Trough, Beaufort Sea |
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