Moored observations of synoptic and seasonal variability in the East Greenland Coastal Current
Author Posting. © American Geophysical Union, 2014. 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: Oceans 119 (2014): 8838–8857, doi:10.1002/2014JC010134. We pr...
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ftwhoas:oai:darchive.mblwhoilibrary.org:1912/7158 2023-05-15T15:15:47+02:00 Moored observations of synoptic and seasonal variability in the East Greenland Coastal Current Harden, Benjamin E. Straneo, Fiamma Sutherland, David A. 2014-12-23 application/pdf https://hdl.handle.net/1912/7158 en_US eng John Wiley & Sons https://doi.org/10.1002/2014JC010134 Journal of Geophysical Research: Oceans 119 (2014): 8838–8857 https://hdl.handle.net/1912/7158 doi:10.1002/2014JC010134 Journal of Geophysical Research: Oceans 119 (2014): 8838–8857 doi:10.1002/2014JC010134 Greenland Freshwater Coastal current Fjord Article 2014 ftwhoas https://doi.org/10.1002/2014JC010134 2022-05-28T22:59:16Z Author Posting. © American Geophysical Union, 2014. 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: Oceans 119 (2014): 8838–8857, doi:10.1002/2014JC010134. We present a year-round assessment of the hydrographic variability within the East Greenland Coastal Current on the Greenland shelf from five synoptic crossings and 4 years of moored hydrographic data. From the five synoptic sections the current is observed as a robust, surface intensified flow with a total volume transport of 0.66 ± 0.18 Sv and a freshwater transport of 42 ± 12 mSv. The moorings showed heretofore unobserved variability in the abundance of Polar and Atlantic water masses in the current on synoptic scales. This is exhibited as large vertical displacement of isotherms (often greater than 100 m). Seasonally, the current is hemmed into the coast during the fall by a full depth Atlantic Water layer that has penetrated onto the inner shelf. The Polar Water layer in the current then thickens through the winter and spring seasons increasing the freshwater content in the current; the timing implies that this is probably driven by the seasonally varying export of freshwater from the Arctic and not the local runoff from Greenland. The measured synoptic variability is enhanced during the winter and spring period due to a lower halocline and a concurrent enhancement in the along-coast wind speed. The local winds force much of the high-frequency variability in a manner consistent with downwelling, but variability distinct from downwelling is also visible. This work was funded by the National Science Foundation grant OCE-1130008, NASA grant NNX13AK88G, and the Ocean and Climate Change Institute at the Woods Hole Oceanographic Institution. 2015-06-23 Article in Journal/Newspaper Arctic Climate change East Greenland Greenland Woods Hole Scientific Community: WHOAS (Woods Hole Open Access Server) Arctic Greenland Journal of Geophysical Research: Oceans 119 12 8838 8857 |
institution |
Open Polar |
collection |
Woods Hole Scientific Community: WHOAS (Woods Hole Open Access Server) |
op_collection_id |
ftwhoas |
language |
English |
topic |
Greenland Freshwater Coastal current Fjord |
spellingShingle |
Greenland Freshwater Coastal current Fjord Harden, Benjamin E. Straneo, Fiamma Sutherland, David A. Moored observations of synoptic and seasonal variability in the East Greenland Coastal Current |
topic_facet |
Greenland Freshwater Coastal current Fjord |
description |
Author Posting. © American Geophysical Union, 2014. 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: Oceans 119 (2014): 8838–8857, doi:10.1002/2014JC010134. We present a year-round assessment of the hydrographic variability within the East Greenland Coastal Current on the Greenland shelf from five synoptic crossings and 4 years of moored hydrographic data. From the five synoptic sections the current is observed as a robust, surface intensified flow with a total volume transport of 0.66 ± 0.18 Sv and a freshwater transport of 42 ± 12 mSv. The moorings showed heretofore unobserved variability in the abundance of Polar and Atlantic water masses in the current on synoptic scales. This is exhibited as large vertical displacement of isotherms (often greater than 100 m). Seasonally, the current is hemmed into the coast during the fall by a full depth Atlantic Water layer that has penetrated onto the inner shelf. The Polar Water layer in the current then thickens through the winter and spring seasons increasing the freshwater content in the current; the timing implies that this is probably driven by the seasonally varying export of freshwater from the Arctic and not the local runoff from Greenland. The measured synoptic variability is enhanced during the winter and spring period due to a lower halocline and a concurrent enhancement in the along-coast wind speed. The local winds force much of the high-frequency variability in a manner consistent with downwelling, but variability distinct from downwelling is also visible. This work was funded by the National Science Foundation grant OCE-1130008, NASA grant NNX13AK88G, and the Ocean and Climate Change Institute at the Woods Hole Oceanographic Institution. 2015-06-23 |
format |
Article in Journal/Newspaper |
author |
Harden, Benjamin E. Straneo, Fiamma Sutherland, David A. |
author_facet |
Harden, Benjamin E. Straneo, Fiamma Sutherland, David A. |
author_sort |
Harden, Benjamin E. |
title |
Moored observations of synoptic and seasonal variability in the East Greenland Coastal Current |
title_short |
Moored observations of synoptic and seasonal variability in the East Greenland Coastal Current |
title_full |
Moored observations of synoptic and seasonal variability in the East Greenland Coastal Current |
title_fullStr |
Moored observations of synoptic and seasonal variability in the East Greenland Coastal Current |
title_full_unstemmed |
Moored observations of synoptic and seasonal variability in the East Greenland Coastal Current |
title_sort |
moored observations of synoptic and seasonal variability in the east greenland coastal current |
publisher |
John Wiley & Sons |
publishDate |
2014 |
url |
https://hdl.handle.net/1912/7158 |
geographic |
Arctic Greenland |
geographic_facet |
Arctic Greenland |
genre |
Arctic Climate change East Greenland Greenland |
genre_facet |
Arctic Climate change East Greenland Greenland |
op_source |
Journal of Geophysical Research: Oceans 119 (2014): 8838–8857 doi:10.1002/2014JC010134 |
op_relation |
https://doi.org/10.1002/2014JC010134 Journal of Geophysical Research: Oceans 119 (2014): 8838–8857 https://hdl.handle.net/1912/7158 doi:10.1002/2014JC010134 |
op_doi |
https://doi.org/10.1002/2014JC010134 |
container_title |
Journal of Geophysical Research: Oceans |
container_volume |
119 |
container_issue |
12 |
container_start_page |
8838 |
op_container_end_page |
8857 |
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1766346133651587072 |