Ocean current observations from Nares Strait to the west of Greenland: Interannual to tidal variability and forcing
Andreas Münchow1 and Humfrey Melling2 During 2003–06, as part of the Arctic Sub-Arctic Ocean Flux (ASOF) experiment, an array of ocean-sensing instruments was deployed at 80.5N latitude to investigate the flux of seawater from the Arctic Ocean via Nares Strait, the pathway to the west of Greenland....
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ftciteseerx:oai:CiteSeerX.psu:10.1.1.689.1715 2023-05-15T14:53:00+02:00 Ocean current observations from Nares Strait to the west of Greenland: Interannual to tidal variability and forcing The Pennsylvania State University CiteSeerX Archives application/pdf http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.689.1715 http://muenchow.cms.udel.edu/papers/MuenchowMelling2008JMR.pdf en eng http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.689.1715 http://muenchow.cms.udel.edu/papers/MuenchowMelling2008JMR.pdf Metadata may be used without restrictions as long as the oai identifier remains attached to it. http://muenchow.cms.udel.edu/papers/MuenchowMelling2008JMR.pdf the atmosphere and delivered to the Arctic Ocean via inflow from the North Pacific via text ftciteseerx 2016-01-08T18:16:13Z Andreas Münchow1 and Humfrey Melling2 During 2003–06, as part of the Arctic Sub-Arctic Ocean Flux (ASOF) experiment, an array of ocean-sensing instruments was deployed at 80.5N latitude to investigate the flux of seawater from the Arctic Ocean via Nares Strait, the pathway to the west of Greenland. Three-year measurements of current from this experiment provide, for the first time at periods longer than a single season, the seawater flux and its variability via this important pathway. Below 30-m depth the average flux of volume 2003–06 was 0.57±0.09 Sv (1 Sv=106 m3 s−1) southward over a 38-km wide section reaching 360 m in depth. A linear trend, statistically significant at the 95 % confidence level, indicates an increase in the section-ally averaged flow below 30-m depth of 20 ± 10 % between 2003 and 2006. The flow is dominated by mixed diurnal and semi-diurnal tidal currents with kinetic energy an order of magnitude larger than that of the subtidal flow. The range of seasonal variation is 30–50 % of the long-term mean flow. Variations in flow of daily to monthly period are comparable in magnitude to the average flow. The flow through the cross-section is the net result of a larger southward flux in the deep western two thirds of the strait and a small northward flux within about 5 km of Greenland. The latter is about 5 % of the former. Spec-tral analyses indicates that the cross-channel pressure gradient is highly correlated with the sectionally averaged flow consistent with geostrophy. Along-channel pressure gradient explains 70 % of the vari-ance at a 33-day period with a phase lag consistent with a frictional response; at 3–7 day period the response is weaker (<30%) with a phase relation suggestive of contributions by both friction and local acceleration. 1. Text Arctic Arctic Ocean Greenland Nares strait Unknown Arctic Arctic Ocean Greenland Pacific Nares ENVELOPE(158.167,158.167,-81.450,-81.450) Andreas ENVELOPE(-60.729,-60.729,-64.008,-64.008) |
institution |
Open Polar |
collection |
Unknown |
op_collection_id |
ftciteseerx |
language |
English |
topic |
the atmosphere and delivered to the Arctic Ocean via inflow from the North Pacific via |
spellingShingle |
the atmosphere and delivered to the Arctic Ocean via inflow from the North Pacific via Ocean current observations from Nares Strait to the west of Greenland: Interannual to tidal variability and forcing |
topic_facet |
the atmosphere and delivered to the Arctic Ocean via inflow from the North Pacific via |
description |
Andreas Münchow1 and Humfrey Melling2 During 2003–06, as part of the Arctic Sub-Arctic Ocean Flux (ASOF) experiment, an array of ocean-sensing instruments was deployed at 80.5N latitude to investigate the flux of seawater from the Arctic Ocean via Nares Strait, the pathway to the west of Greenland. Three-year measurements of current from this experiment provide, for the first time at periods longer than a single season, the seawater flux and its variability via this important pathway. Below 30-m depth the average flux of volume 2003–06 was 0.57±0.09 Sv (1 Sv=106 m3 s−1) southward over a 38-km wide section reaching 360 m in depth. A linear trend, statistically significant at the 95 % confidence level, indicates an increase in the section-ally averaged flow below 30-m depth of 20 ± 10 % between 2003 and 2006. The flow is dominated by mixed diurnal and semi-diurnal tidal currents with kinetic energy an order of magnitude larger than that of the subtidal flow. The range of seasonal variation is 30–50 % of the long-term mean flow. Variations in flow of daily to monthly period are comparable in magnitude to the average flow. The flow through the cross-section is the net result of a larger southward flux in the deep western two thirds of the strait and a small northward flux within about 5 km of Greenland. The latter is about 5 % of the former. Spec-tral analyses indicates that the cross-channel pressure gradient is highly correlated with the sectionally averaged flow consistent with geostrophy. Along-channel pressure gradient explains 70 % of the vari-ance at a 33-day period with a phase lag consistent with a frictional response; at 3–7 day period the response is weaker (<30%) with a phase relation suggestive of contributions by both friction and local acceleration. 1. |
author2 |
The Pennsylvania State University CiteSeerX Archives |
format |
Text |
title |
Ocean current observations from Nares Strait to the west of Greenland: Interannual to tidal variability and forcing |
title_short |
Ocean current observations from Nares Strait to the west of Greenland: Interannual to tidal variability and forcing |
title_full |
Ocean current observations from Nares Strait to the west of Greenland: Interannual to tidal variability and forcing |
title_fullStr |
Ocean current observations from Nares Strait to the west of Greenland: Interannual to tidal variability and forcing |
title_full_unstemmed |
Ocean current observations from Nares Strait to the west of Greenland: Interannual to tidal variability and forcing |
title_sort |
ocean current observations from nares strait to the west of greenland: interannual to tidal variability and forcing |
url |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.689.1715 http://muenchow.cms.udel.edu/papers/MuenchowMelling2008JMR.pdf |
long_lat |
ENVELOPE(158.167,158.167,-81.450,-81.450) ENVELOPE(-60.729,-60.729,-64.008,-64.008) |
geographic |
Arctic Arctic Ocean Greenland Pacific Nares Andreas |
geographic_facet |
Arctic Arctic Ocean Greenland Pacific Nares Andreas |
genre |
Arctic Arctic Ocean Greenland Nares strait |
genre_facet |
Arctic Arctic Ocean Greenland Nares strait |
op_source |
http://muenchow.cms.udel.edu/papers/MuenchowMelling2008JMR.pdf |
op_relation |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.689.1715 http://muenchow.cms.udel.edu/papers/MuenchowMelling2008JMR.pdf |
op_rights |
Metadata may be used without restrictions as long as the oai identifier remains attached to it. |
_version_ |
1766324427751948288 |