Approaching Freshet beneath Landfast Ice in Kugmallit Bay on the Canadian Arctic Shelf: Evidence from Sensor and Ground Truth Data
The Mackenzie River is the largest river in the North American Arctic. Its huge freshwater and sediment load impacts the Canadian Beaufort Shelf, transporting large quantities of sediment and associated organic carbon into the Arctic Ocean. The majority of this sediment transport occurs during the f...
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The Arctic Institute of North America
2009
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crarcticinstna:10.14430/arctic8 2024-06-09T07:42:09+00:00 Approaching Freshet beneath Landfast Ice in Kugmallit Bay on the Canadian Arctic Shelf: Evidence from Sensor and Ground Truth Data Walker, Tony R. Grant, Jon Jarvis, Peter 2009 http://dx.doi.org/10.14430/arctic8 http://arctic.journalhosting.ucalgary.ca/arctic/index.php/arctic/article/viewFile/8/8 unknown The Arctic Institute of North America ARCTIC volume 61, issue 1, page 76 ISSN 1923-1245 0004-0843 journal-article 2009 crarcticinstna https://doi.org/10.14430/arctic8 2024-05-14T12:53:43Z The Mackenzie River is the largest river in the North American Arctic. Its huge freshwater and sediment load impacts the Canadian Beaufort Shelf, transporting large quantities of sediment and associated organic carbon into the Arctic Ocean. The majority of this sediment transport occurs during the freshet peak flow season (May to June). Mackenzie River-Arctic Ocean coupling has been widely studied during open water seasons, but has rarely been investigated in shallow water under landfast ice in Kugmallit Bay with field-based surveys, except for those using remote sensing. We observed and measured sedimentation rates (51 g m-2 d-1) and the concentrations of chlorophyll a (mean 2.2 ?g L-1) and suspended particulate matter (8.5 mg L-1) and determined the sediment characteristics during early spring, before the breakup of landfast ice in Kugmallit Bay. We then compared these results with comparable data collected from the same site the previous summer. Comparison of organic quality in seston and trapped material demonstrated substantial seasonal differences. The subtle changes in biological and oceanographic variables beneath landfast ice that we measured using sensors and field sampling techniques suggest the onset of a spring melt occurring hundreds of kilometres farther south in the Mackenzie Basin. Article in Journal/Newspaper Arctic Arctic Arctic Ocean Mackenzie Basin Mackenzie river Arctic Institute of North America Arctic Arctic Ocean Beaufort Shelf ENVELOPE(-142.500,-142.500,70.000,70.000) Kugmallit Bay ENVELOPE(-133.500,-133.500,69.558,69.558) Mackenzie River ARCTIC 61 1 76 |
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Open Polar |
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Arctic Institute of North America |
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The Mackenzie River is the largest river in the North American Arctic. Its huge freshwater and sediment load impacts the Canadian Beaufort Shelf, transporting large quantities of sediment and associated organic carbon into the Arctic Ocean. The majority of this sediment transport occurs during the freshet peak flow season (May to June). Mackenzie River-Arctic Ocean coupling has been widely studied during open water seasons, but has rarely been investigated in shallow water under landfast ice in Kugmallit Bay with field-based surveys, except for those using remote sensing. We observed and measured sedimentation rates (51 g m-2 d-1) and the concentrations of chlorophyll a (mean 2.2 ?g L-1) and suspended particulate matter (8.5 mg L-1) and determined the sediment characteristics during early spring, before the breakup of landfast ice in Kugmallit Bay. We then compared these results with comparable data collected from the same site the previous summer. Comparison of organic quality in seston and trapped material demonstrated substantial seasonal differences. The subtle changes in biological and oceanographic variables beneath landfast ice that we measured using sensors and field sampling techniques suggest the onset of a spring melt occurring hundreds of kilometres farther south in the Mackenzie Basin. |
format |
Article in Journal/Newspaper |
author |
Walker, Tony R. Grant, Jon Jarvis, Peter |
spellingShingle |
Walker, Tony R. Grant, Jon Jarvis, Peter Approaching Freshet beneath Landfast Ice in Kugmallit Bay on the Canadian Arctic Shelf: Evidence from Sensor and Ground Truth Data |
author_facet |
Walker, Tony R. Grant, Jon Jarvis, Peter |
author_sort |
Walker, Tony R. |
title |
Approaching Freshet beneath Landfast Ice in Kugmallit Bay on the Canadian Arctic Shelf: Evidence from Sensor and Ground Truth Data |
title_short |
Approaching Freshet beneath Landfast Ice in Kugmallit Bay on the Canadian Arctic Shelf: Evidence from Sensor and Ground Truth Data |
title_full |
Approaching Freshet beneath Landfast Ice in Kugmallit Bay on the Canadian Arctic Shelf: Evidence from Sensor and Ground Truth Data |
title_fullStr |
Approaching Freshet beneath Landfast Ice in Kugmallit Bay on the Canadian Arctic Shelf: Evidence from Sensor and Ground Truth Data |
title_full_unstemmed |
Approaching Freshet beneath Landfast Ice in Kugmallit Bay on the Canadian Arctic Shelf: Evidence from Sensor and Ground Truth Data |
title_sort |
approaching freshet beneath landfast ice in kugmallit bay on the canadian arctic shelf: evidence from sensor and ground truth data |
publisher |
The Arctic Institute of North America |
publishDate |
2009 |
url |
http://dx.doi.org/10.14430/arctic8 http://arctic.journalhosting.ucalgary.ca/arctic/index.php/arctic/article/viewFile/8/8 |
long_lat |
ENVELOPE(-142.500,-142.500,70.000,70.000) ENVELOPE(-133.500,-133.500,69.558,69.558) |
geographic |
Arctic Arctic Ocean Beaufort Shelf Kugmallit Bay Mackenzie River |
geographic_facet |
Arctic Arctic Ocean Beaufort Shelf Kugmallit Bay Mackenzie River |
genre |
Arctic Arctic Arctic Ocean Mackenzie Basin Mackenzie river |
genre_facet |
Arctic Arctic Arctic Ocean Mackenzie Basin Mackenzie river |
op_source |
ARCTIC volume 61, issue 1, page 76 ISSN 1923-1245 0004-0843 |
op_doi |
https://doi.org/10.14430/arctic8 |
container_title |
ARCTIC |
container_volume |
61 |
container_issue |
1 |
container_start_page |
76 |
_version_ |
1801371062868377600 |