Oceanographic regime shift during 1997 in Disko Bay, Western Greenland
Data from a long time series of temperature, salinity, and nutrient measurements in Disko Bay (West Greenland) reveal a marked change in the water characteristics during recent years. Seasonal dynamics in the upper 150 m of the water column were highly affected by the seasonality in meteorological c...
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crwiley:10.4319/lo.2012.57.2.0634 2024-06-02T08:05:46+00:00 Oceanographic regime shift during 1997 in Disko Bay, Western Greenland Hansen, Marc Overgaard Nielsen, Torkel Gissel Stedmon, Colin A. Munk, Peter 2012 http://dx.doi.org/10.4319/lo.2012.57.2.0634 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.4319%2Flo.2012.57.2.0634 https://aslopubs.onlinelibrary.wiley.com/doi/pdf/10.4319/lo.2012.57.2.0634 en eng Wiley http://onlinelibrary.wiley.com/termsAndConditions#vor Limnology and Oceanography volume 57, issue 2, page 634-644 ISSN 0024-3590 1939-5590 journal-article 2012 crwiley https://doi.org/10.4319/lo.2012.57.2.0634 2024-05-06T06:59:16Z Data from a long time series of temperature, salinity, and nutrient measurements in Disko Bay (West Greenland) reveal a marked change in the water characteristics during recent years. Seasonal dynamics in the upper 150 m of the water column were highly affected by the seasonality in meteorological conditions, while the deeper water strata were more stable and were primarily influenced by large‐scale circulation patterns. There was a marked increase in the average water temperatures at 200‐m depth in spring 1997, with the long‐term average increasing from 1.30°C to 2.25°C. Weekly data from 1996 to 1997 show that the sudden change in bottom water occurred in April 1997, due to the inflow of a larger proportion of North Atlantic water, which propagated north along the coast before entering the bay. Further support for this inflow was found when tracing the relative proportion of Atlantic water in the bay, using inorganic nutrients. These changes in the oceanography of the bay will not only lead to further glacial retreat but will also affect the local marine ecosystem by changing the relative dominance of major copepod species that overwinter in bottom waters of the bay. Article in Journal/Newspaper Disko Bay Greenland North Atlantic Wiley Online Library Greenland Limnology and Oceanography 57 2 634 644 |
institution |
Open Polar |
collection |
Wiley Online Library |
op_collection_id |
crwiley |
language |
English |
description |
Data from a long time series of temperature, salinity, and nutrient measurements in Disko Bay (West Greenland) reveal a marked change in the water characteristics during recent years. Seasonal dynamics in the upper 150 m of the water column were highly affected by the seasonality in meteorological conditions, while the deeper water strata were more stable and were primarily influenced by large‐scale circulation patterns. There was a marked increase in the average water temperatures at 200‐m depth in spring 1997, with the long‐term average increasing from 1.30°C to 2.25°C. Weekly data from 1996 to 1997 show that the sudden change in bottom water occurred in April 1997, due to the inflow of a larger proportion of North Atlantic water, which propagated north along the coast before entering the bay. Further support for this inflow was found when tracing the relative proportion of Atlantic water in the bay, using inorganic nutrients. These changes in the oceanography of the bay will not only lead to further glacial retreat but will also affect the local marine ecosystem by changing the relative dominance of major copepod species that overwinter in bottom waters of the bay. |
format |
Article in Journal/Newspaper |
author |
Hansen, Marc Overgaard Nielsen, Torkel Gissel Stedmon, Colin A. Munk, Peter |
spellingShingle |
Hansen, Marc Overgaard Nielsen, Torkel Gissel Stedmon, Colin A. Munk, Peter Oceanographic regime shift during 1997 in Disko Bay, Western Greenland |
author_facet |
Hansen, Marc Overgaard Nielsen, Torkel Gissel Stedmon, Colin A. Munk, Peter |
author_sort |
Hansen, Marc Overgaard |
title |
Oceanographic regime shift during 1997 in Disko Bay, Western Greenland |
title_short |
Oceanographic regime shift during 1997 in Disko Bay, Western Greenland |
title_full |
Oceanographic regime shift during 1997 in Disko Bay, Western Greenland |
title_fullStr |
Oceanographic regime shift during 1997 in Disko Bay, Western Greenland |
title_full_unstemmed |
Oceanographic regime shift during 1997 in Disko Bay, Western Greenland |
title_sort |
oceanographic regime shift during 1997 in disko bay, western greenland |
publisher |
Wiley |
publishDate |
2012 |
url |
http://dx.doi.org/10.4319/lo.2012.57.2.0634 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.4319%2Flo.2012.57.2.0634 https://aslopubs.onlinelibrary.wiley.com/doi/pdf/10.4319/lo.2012.57.2.0634 |
geographic |
Greenland |
geographic_facet |
Greenland |
genre |
Disko Bay Greenland North Atlantic |
genre_facet |
Disko Bay Greenland North Atlantic |
op_source |
Limnology and Oceanography volume 57, issue 2, page 634-644 ISSN 0024-3590 1939-5590 |
op_rights |
http://onlinelibrary.wiley.com/termsAndConditions#vor |
op_doi |
https://doi.org/10.4319/lo.2012.57.2.0634 |
container_title |
Limnology and Oceanography |
container_volume |
57 |
container_issue |
2 |
container_start_page |
634 |
op_container_end_page |
644 |
_version_ |
1800750649695010816 |