A description of water types on the Mackenzie Shelf of the Beaufort Sea during winter
For a number of years during the 1980s, observations of the physical and chemical properties of seawater in the southeastern Beaufort Sea have been acquired in late winter. The most complete data set, from 1987, has been used in a comparison of winter and summer (Macdonald et al., 1989) water proper...
Published in: | Journal of Geophysical Research |
---|---|
Main Authors: | , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
2013
|
Subjects: | |
Online Access: | http://hdl.handle.net/10222/27502 https://doi.org/10.1029/92JC00842 |
id |
ftdalhouse:oai:DalSpace.library.dal.ca:10222/27502 |
---|---|
record_format |
openpolar |
spelling |
ftdalhouse:oai:DalSpace.library.dal.ca:10222/27502 2023-05-15T15:00:55+02:00 A description of water types on the Mackenzie Shelf of the Beaufort Sea during winter Moore, R. M. Melling, H. Thompson, K. R. 2013-06-19T18:06:24Z http://hdl.handle.net/10222/27502 https://doi.org/10.1029/92JC00842 en eng Journal of Geophysical Research.C.Oceans Moore, R. M., H. Melling, and K. R. Thompson. 1992. "A description of water types on the Mackenzie Shelf of the Beaufort Sea during winter." Journal of Geophysical Research.C.Oceans 97(C8): 12607-12618. DOI:10.1029/92JC00842 0148-0227 http://hdl.handle.net/10222/27502 http://dx.doi.org/10.1029/92JC00842 97 8 12607 This paper was published by AGU. Copyright 1992 American Geophysical Union Continental shelves Marine River discharge Water mass intrusions Physicochemical properties Seasonality Salinity data Mackenzie Shelf article 2013 ftdalhouse https://doi.org/10.1029/92JC00842 2021-12-29T18:08:45Z For a number of years during the 1980s, observations of the physical and chemical properties of seawater in the southeastern Beaufort Sea have been acquired in late winter. The most complete data set, from 1987, has been used in a comparison of winter and summer (Macdonald et al., 1989) water properties in the area. Most obvious is an increase in the salinity of surface waters in winter. The magnitude of this increase varies dramatically from year to year. Part of the increase is a consequence of brine rejection during the growth of sea ice, and part is associated with an intrusion over the shelf of a water mass of high nutrient and low oxygen concentrations which is a feature of the entire western Arctic Ocean. Principal component analysis was used to allow all five chemical tracers to be combined and viewed simultaneously. The properties of the upper 120 m are found to lie, to a close approximation, on a plane. This leads us to simple interpretation based on a three-component mixing model involving river runoff, water from the nutrient maximum, and an offshore near-surface component. It is shown that the best fit plane occupied by arctic surface waters in the Beaufort Sea closely matches that defined by the influences of river inflow, of the freeze-melt cycle, and of photosynthesis and respiration. However, the effects of freezing/melting and of river inflow cannot be clearly distinguished using the chosen suite of tracers. It has been determined that if the waters of the upper 250 m are to be represented in the same manner, a fourth end member is required. Article in Journal/Newspaper Arctic Arctic Ocean Beaufort Sea Mackenzie Shelf Sea ice Dalhousie University: DalSpace Institutional Repository Arctic Arctic Ocean Journal of Geophysical Research 97 C8 12607 |
institution |
Open Polar |
collection |
Dalhousie University: DalSpace Institutional Repository |
op_collection_id |
ftdalhouse |
language |
English |
topic |
Continental shelves Marine River discharge Water mass intrusions Physicochemical properties Seasonality Salinity data Mackenzie Shelf |
spellingShingle |
Continental shelves Marine River discharge Water mass intrusions Physicochemical properties Seasonality Salinity data Mackenzie Shelf Moore, R. M. Melling, H. Thompson, K. R. A description of water types on the Mackenzie Shelf of the Beaufort Sea during winter |
topic_facet |
Continental shelves Marine River discharge Water mass intrusions Physicochemical properties Seasonality Salinity data Mackenzie Shelf |
description |
For a number of years during the 1980s, observations of the physical and chemical properties of seawater in the southeastern Beaufort Sea have been acquired in late winter. The most complete data set, from 1987, has been used in a comparison of winter and summer (Macdonald et al., 1989) water properties in the area. Most obvious is an increase in the salinity of surface waters in winter. The magnitude of this increase varies dramatically from year to year. Part of the increase is a consequence of brine rejection during the growth of sea ice, and part is associated with an intrusion over the shelf of a water mass of high nutrient and low oxygen concentrations which is a feature of the entire western Arctic Ocean. Principal component analysis was used to allow all five chemical tracers to be combined and viewed simultaneously. The properties of the upper 120 m are found to lie, to a close approximation, on a plane. This leads us to simple interpretation based on a three-component mixing model involving river runoff, water from the nutrient maximum, and an offshore near-surface component. It is shown that the best fit plane occupied by arctic surface waters in the Beaufort Sea closely matches that defined by the influences of river inflow, of the freeze-melt cycle, and of photosynthesis and respiration. However, the effects of freezing/melting and of river inflow cannot be clearly distinguished using the chosen suite of tracers. It has been determined that if the waters of the upper 250 m are to be represented in the same manner, a fourth end member is required. |
format |
Article in Journal/Newspaper |
author |
Moore, R. M. Melling, H. Thompson, K. R. |
author_facet |
Moore, R. M. Melling, H. Thompson, K. R. |
author_sort |
Moore, R. M. |
title |
A description of water types on the Mackenzie Shelf of the Beaufort Sea during winter |
title_short |
A description of water types on the Mackenzie Shelf of the Beaufort Sea during winter |
title_full |
A description of water types on the Mackenzie Shelf of the Beaufort Sea during winter |
title_fullStr |
A description of water types on the Mackenzie Shelf of the Beaufort Sea during winter |
title_full_unstemmed |
A description of water types on the Mackenzie Shelf of the Beaufort Sea during winter |
title_sort |
description of water types on the mackenzie shelf of the beaufort sea during winter |
publishDate |
2013 |
url |
http://hdl.handle.net/10222/27502 https://doi.org/10.1029/92JC00842 |
geographic |
Arctic Arctic Ocean |
geographic_facet |
Arctic Arctic Ocean |
genre |
Arctic Arctic Ocean Beaufort Sea Mackenzie Shelf Sea ice |
genre_facet |
Arctic Arctic Ocean Beaufort Sea Mackenzie Shelf Sea ice |
op_relation |
Journal of Geophysical Research.C.Oceans Moore, R. M., H. Melling, and K. R. Thompson. 1992. "A description of water types on the Mackenzie Shelf of the Beaufort Sea during winter." Journal of Geophysical Research.C.Oceans 97(C8): 12607-12618. DOI:10.1029/92JC00842 0148-0227 http://hdl.handle.net/10222/27502 http://dx.doi.org/10.1029/92JC00842 97 8 12607 |
op_rights |
This paper was published by AGU. Copyright 1992 American Geophysical Union |
op_doi |
https://doi.org/10.1029/92JC00842 |
container_title |
Journal of Geophysical Research |
container_volume |
97 |
container_issue |
C8 |
container_start_page |
12607 |
_version_ |
1766332966964822016 |