Body sizes and dive characteristics of narwhals (Monodon monoceros) from Kakiak Point and Melville Bay (2005-2007)
We report on wintertime data collected from Baffin Bay and northern Davis Strait, a major gateway linking the Arctic with the subpolar North Atlantic, using narwhals (Monodon monoceros) as an oceanographic sampling platform. Fourteen narwhals were instrumented with satellite-linked time-depth-temper...
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ftpangaea:oai:pangaea.de:doi:10.1594/PANGAEA.814057 2023-05-15T14:56:40+02:00 Body sizes and dive characteristics of narwhals (Monodon monoceros) from Kakiak Point and Melville Bay (2005-2007) Laidre, Kristin L Heide-Jørgensen, Mads Peter Ermold, W Steele, Michael MEDIAN LATITUDE: 74.276850 * MEDIAN LONGITUDE: -73.748150 * SOUTH-BOUND LATITUDE: 72.683300 * WEST-BOUND LONGITUDE: -86.688900 * NORTH-BOUND LATITUDE: 75.870100 * EAST-BOUND LONGITUDE: -60.807700 * DATE/TIME START: 2005-08-01T00:00:00 * DATE/TIME END: 2008-03-01T00:00:00 2010-05-30 application/zip, 2 datasets https://doi.pangaea.de/10.1594/PANGAEA.814057 https://doi.org/10.1594/PANGAEA.814057 en eng PANGAEA https://doi.pangaea.de/10.1594/PANGAEA.814057 https://doi.org/10.1594/PANGAEA.814057 CC-BY-3.0: Creative Commons Attribution 3.0 Unported Access constraints: unrestricted info:eu-repo/semantics/openAccess CC-BY Supplement to: Laidre, Kristin L; Heide-Jørgensen, Mads Peter; Ermold, W; Steele, Michael (2010): Narwhals document continued warming of southern Baffin Bay. Journal of Geophysical Research, 115(C10), C10049, https://doi.org/10.1029/2009JC005820 International Polar Year (2007-2008) IPY Dataset 2010 ftpangaea https://doi.org/10.1594/PANGAEA.814057 https://doi.org/10.1029/2009JC005820 2023-01-20T07:33:01Z We report on wintertime data collected from Baffin Bay and northern Davis Strait, a major gateway linking the Arctic with the subpolar North Atlantic, using narwhals (Monodon monoceros) as an oceanographic sampling platform. Fourteen narwhals were instrumented with satellite-linked time-depth-temperature recorders between 2005 and 2007. Transmitters collected and transmitted water column temperature profiles from each dive between December and April, where >90% of maximum daily dive depths reached the bottom. Temperature measurements were combined with 15 helicopter-based conductivity-temperature-depth (CTD) casts taken in April 2007 across central Baffin Bay and compared with hydrographic climatology values used for the region in Arctic climate models. Winter temperature maxima for whale and CTD data were in good agreement, ranging between 4.0°C and 4.6°C in inshore and offshore Baffin Bay and in Davis Strait. The warm Irminger Water was identified between 57°W and 59°W (at 68°N) between 200 and 400 m depths. Whale data correlated well with climatological temperature maxima; however, they were on average 0.9°C warmer ±0.6°C (P < 0.001). Furthermore, climatology data overestimated the winter surface isothermal layer thickness by 50-80 m. Our results suggest the previously documented warming in Baffin Bay has continued through 2007 and is associated with a warmer West Greenland Current in both of its constituent water masses. This research demonstrates the feasibility of using narwhals as ocean observation platforms in inaccessible Arctic areas where dense sea ice prevents regular oceanographic measurements and where innate site fidelity, affinity for winter pack ice, and multiple daily dives to >1700 m offer a useful opportunity to sample the area. Dataset Arctic Baffin Bay Baffin Bay Baffin Davis Strait Greenland International Polar Year IPY Monodon monoceros narwhal* North Atlantic Sea ice PANGAEA - Data Publisher for Earth & Environmental Science Arctic Baffin Bay Greenland Kakiak Point ENVELOPE(-86.667,-86.667,72.668,72.668) ENVELOPE(-86.688900,-60.807700,75.870100,72.683300) |
institution |
Open Polar |
collection |
PANGAEA - Data Publisher for Earth & Environmental Science |
op_collection_id |
ftpangaea |
language |
English |
topic |
International Polar Year (2007-2008) IPY |
spellingShingle |
International Polar Year (2007-2008) IPY Laidre, Kristin L Heide-Jørgensen, Mads Peter Ermold, W Steele, Michael Body sizes and dive characteristics of narwhals (Monodon monoceros) from Kakiak Point and Melville Bay (2005-2007) |
topic_facet |
International Polar Year (2007-2008) IPY |
description |
We report on wintertime data collected from Baffin Bay and northern Davis Strait, a major gateway linking the Arctic with the subpolar North Atlantic, using narwhals (Monodon monoceros) as an oceanographic sampling platform. Fourteen narwhals were instrumented with satellite-linked time-depth-temperature recorders between 2005 and 2007. Transmitters collected and transmitted water column temperature profiles from each dive between December and April, where >90% of maximum daily dive depths reached the bottom. Temperature measurements were combined with 15 helicopter-based conductivity-temperature-depth (CTD) casts taken in April 2007 across central Baffin Bay and compared with hydrographic climatology values used for the region in Arctic climate models. Winter temperature maxima for whale and CTD data were in good agreement, ranging between 4.0°C and 4.6°C in inshore and offshore Baffin Bay and in Davis Strait. The warm Irminger Water was identified between 57°W and 59°W (at 68°N) between 200 and 400 m depths. Whale data correlated well with climatological temperature maxima; however, they were on average 0.9°C warmer ±0.6°C (P < 0.001). Furthermore, climatology data overestimated the winter surface isothermal layer thickness by 50-80 m. Our results suggest the previously documented warming in Baffin Bay has continued through 2007 and is associated with a warmer West Greenland Current in both of its constituent water masses. This research demonstrates the feasibility of using narwhals as ocean observation platforms in inaccessible Arctic areas where dense sea ice prevents regular oceanographic measurements and where innate site fidelity, affinity for winter pack ice, and multiple daily dives to >1700 m offer a useful opportunity to sample the area. |
format |
Dataset |
author |
Laidre, Kristin L Heide-Jørgensen, Mads Peter Ermold, W Steele, Michael |
author_facet |
Laidre, Kristin L Heide-Jørgensen, Mads Peter Ermold, W Steele, Michael |
author_sort |
Laidre, Kristin L |
title |
Body sizes and dive characteristics of narwhals (Monodon monoceros) from Kakiak Point and Melville Bay (2005-2007) |
title_short |
Body sizes and dive characteristics of narwhals (Monodon monoceros) from Kakiak Point and Melville Bay (2005-2007) |
title_full |
Body sizes and dive characteristics of narwhals (Monodon monoceros) from Kakiak Point and Melville Bay (2005-2007) |
title_fullStr |
Body sizes and dive characteristics of narwhals (Monodon monoceros) from Kakiak Point and Melville Bay (2005-2007) |
title_full_unstemmed |
Body sizes and dive characteristics of narwhals (Monodon monoceros) from Kakiak Point and Melville Bay (2005-2007) |
title_sort |
body sizes and dive characteristics of narwhals (monodon monoceros) from kakiak point and melville bay (2005-2007) |
publisher |
PANGAEA |
publishDate |
2010 |
url |
https://doi.pangaea.de/10.1594/PANGAEA.814057 https://doi.org/10.1594/PANGAEA.814057 |
op_coverage |
MEDIAN LATITUDE: 74.276850 * MEDIAN LONGITUDE: -73.748150 * SOUTH-BOUND LATITUDE: 72.683300 * WEST-BOUND LONGITUDE: -86.688900 * NORTH-BOUND LATITUDE: 75.870100 * EAST-BOUND LONGITUDE: -60.807700 * DATE/TIME START: 2005-08-01T00:00:00 * DATE/TIME END: 2008-03-01T00:00:00 |
long_lat |
ENVELOPE(-86.667,-86.667,72.668,72.668) ENVELOPE(-86.688900,-60.807700,75.870100,72.683300) |
geographic |
Arctic Baffin Bay Greenland Kakiak Point |
geographic_facet |
Arctic Baffin Bay Greenland Kakiak Point |
genre |
Arctic Baffin Bay Baffin Bay Baffin Davis Strait Greenland International Polar Year IPY Monodon monoceros narwhal* North Atlantic Sea ice |
genre_facet |
Arctic Baffin Bay Baffin Bay Baffin Davis Strait Greenland International Polar Year IPY Monodon monoceros narwhal* North Atlantic Sea ice |
op_source |
Supplement to: Laidre, Kristin L; Heide-Jørgensen, Mads Peter; Ermold, W; Steele, Michael (2010): Narwhals document continued warming of southern Baffin Bay. Journal of Geophysical Research, 115(C10), C10049, https://doi.org/10.1029/2009JC005820 |
op_relation |
https://doi.pangaea.de/10.1594/PANGAEA.814057 https://doi.org/10.1594/PANGAEA.814057 |
op_rights |
CC-BY-3.0: Creative Commons Attribution 3.0 Unported Access constraints: unrestricted info:eu-repo/semantics/openAccess |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.1594/PANGAEA.814057 https://doi.org/10.1029/2009JC005820 |
_version_ |
1766328759782211584 |