scholarly journals Seabird and Marine Mammal at-sea Distribution in the Norwegian, Greenland and Wandel Seas, 2018

2020 ◽  
Vol 3 (4) ◽  
Keyword(s):  
Arctic Ocean ◽  
Marine Mammal ◽  
High Arctic ◽  
Mean Value ◽  
Seabird Species ◽  
Norwegian Sea ◽  
Fulmarus Glacialis ◽  
Ivory Gull ◽  
Transect Counts ◽  
North Greenland

Quantitative seabird and marine mammal at-sea distribution was determined in the Norwegian, Greenland and Wandel seas in August 2018 on board the icebreaking RV Polarstern. A total of 7,380 seabirds belonging to 25 species were tallied during 380 transect counts lasting 30 minute each, i.e. a mean value of 19 per count. Cetaceans were represented by seven species (mean of 0.1 per count) and pinnipeds by four species (0.1 per count). Numbers of seabird species and of individuals were low in the Norwegian Sea and the Greenland Sea (12 and 14 species, 4 and 8 individuals per count). They were especially low in the Wandel Sea off North Greenland: seven seabird species (2 individuals per count), mainly ivory gull Pagophila eburnea and fulmar Fulmarus glacialis. Cetaceans were absent and pinnipeds represented by three species only (0.3 per count). These concentrations are extremely low even when compared to other areas of the high Arctic Ocean.

scholarly journals The Rossby radius in the Arctic Ocean

Ocean Science ◽  
2014 ◽  
Vol 10 (6) ◽  
pp. 967-975 ◽  
Author(s):  
A. J. G. Nurser ◽  
S. Bacon
Keyword(s):  
Arctic Ocean ◽  
General Circulation ◽  
Circulation Model ◽  
Ocean General Circulation Model ◽  
High Arctic ◽  
The Arctic ◽  
Hudson Bay ◽  
Ocean Eddies ◽  
Shelf Seas ◽  
The Impact

Abstract. The first (and second) baroclinic deformation (or Rossby) radii are presented north of ~60° N, focusing on deep basins and shelf seas in the high Arctic Ocean, the Nordic seas, Baffin Bay, Hudson Bay and the Canadian Arctic Archipelago, derived from climatological ocean data. In the high Arctic Ocean, the first Rossby radius increases from ~5 km in the Nansen Basin to ~15 km in the central Canadian Basin. In the shelf seas and elsewhere, values are low (1–7 km), reflecting weak density stratification, shallow water, or both. Seasonality strongly impacts the Rossby radius only in shallow seas, where winter homogenization of the water column can reduce it to below 1 km. Greater detail is seen in the output from an ice–ocean general circulation model, of higher resolution than the climatology. To assess the impact of secular variability, 10 years (2003–2012) of hydrographic stations along 150° W in the Beaufort Gyre are also analysed. The first-mode Rossby radius increases over this period by ~20%. Finally, we review the observed scales of Arctic Ocean eddies.

Why do we monitor? Using seabird eggs to track trends in Arctic environmental contamination

2021 ◽  
Author(s):  
Kristin Bianchini ◽  
Mark L. Mallory ◽  
Birgit Braune ◽  
Derek C.G. Muir ◽  
Jennifer F. Provencher
Keyword(s):  
Emerging Contaminants ◽  
Monitoring Program ◽  
High Arctic ◽  
Future Research ◽  
Arctic Canada ◽  
Seabird Species ◽  
Contaminant Monitoring ◽  
History Of ◽  
Low Arctic ◽  
High Level

Contaminant levels and trends have been monitored in eggs of seabirds from the Canadian Arctic since 1975. Nearly 50 years of monitoring have provided key information regarding the temporal and spatial variation of various contaminant classes in different seabird species. However, previous work has primarily assessed individual or related contaminant classes in isolation. There is therefore a need to collectively consider all of the contaminants monitored in seabird eggs to determine where monitoring has been successful, to find areas for improvement, and to identify opportunities for future research. In this review, we evaluated monitoring data for the major legacy and emerging contaminants of concern in five seabird species from three High Arctic and three Low Arctic colonies in Canada. We review the history of Canada’s Arctic seabird egg monitoring program and discuss how monitoring efforts have changed over time; we summarize temporal, spatial, and interspecies variations in Arctic seabird egg contamination and identify important knowledge gaps; and we discuss future directions for ecotoxicology research using seabird eggs in Arctic Canada. Ultimately, this paper provides a high-level overview of the egg contaminant monitoring program and underscores the importance of long-term and continued seabird contaminant monitoring in Arctic Canada.

High-Arctic climate conditions for the last 7000 years inferred from multi-proxy analysis of the Bliss Lake record, North Greenland

2011 ◽  
Vol 27 (3) ◽  
pp. 318-327 ◽  
Author(s):  
Jesper Olsen ◽  
Kurt H. Kjaer ◽  
Svend Funder ◽  
Nicolaj K. Larsen ◽  
Anna Ludikova
Keyword(s):  
High Arctic ◽  
Arctic Climate ◽  
Climate Conditions ◽  
Lake Record ◽  
North Greenland

Mammals of central North Greenland

Polar Record ◽  
1989 ◽  
Vol 25 (152) ◽  
pp. 43-49 ◽  
Author(s):  
O. Bennike ◽  
A. K. Higgins ◽  
M. Kelly
Keyword(s):  
Arctic Ocean ◽  
Polar Bear ◽  
Ringed Seal ◽  
The Arctic ◽  
Arctic Fox ◽  
Bearded Seal ◽  
The Arctic Ocean ◽  
Arctic Hare ◽  
Musk Ox ◽  
North Greenland

AbstractCentral North Greenland, an uninhabited and rarely visited region bordering the Arctic Ocean, supports arctic hare, collared lemming, wolf, arctic fox, polar bear, stoat, ringed seal and musk ox. Their distribution and abundance were noted during Geological Survey of Greenland expeditions in 1984–85, which visited virtually all land areas in the region, including nunataks and islands. Bones of reindeer, bearded seal and narwhal were also found. Ringed seal and reindeer are known to have been present in the region by the early Holocene.

Late Cretaceous–Palaeocene continental rifting in the High Arctic: U–Pb geochronology of the Kap Washington Group volcanic sequence, North Greenland

2011 ◽  
Vol 168 (5) ◽  
pp. 1093-1106 ◽  
Author(s):  
Sigurjon B. Thorarinsson ◽  
Paul M. Holm ◽  
Sebastian Tappe ◽  
Larry M. Heaman ◽  
Christian Tegner
Keyword(s):  
Late Cretaceous ◽  
High Arctic ◽  
Continental Rifting ◽  
Volcanic Sequence ◽  
North Greenland

scholarly journals The age of the Kap Washington Group volcanics, North Greenland

1982 ◽  
Vol 31 ◽  
pp. 49-55
Author(s):  
O. Larsen
Keyword(s):  
Arctic Ocean ◽  
Late Cretaceous ◽  
Volcanic Activity ◽  
Coastal Region ◽  
Ocean Basin ◽  
The Arctic ◽  
Fossil Plant ◽  
Plant Remains ◽  
The Arctic Ocean ◽  
North Greenland

The Kap Washington Group of peralkaline volcanics is exposed along the coast of North Greenland at 40°W. This coastal region is intruded by numerous NNE-NW-trending dolerite dykes of alkaline affinity. The volcanics and their basic intrusive counterparts appear to be related to the initial rifting in the Arctic Ocean basin. The timing of this rifting may be supported by accurate dating of the associated volcanic activity. An improved Rb/Sr age of 64±3 million years (i.e. approximately at the Cretaceous-Tertiary boundary) has been determined on rhyolitic lavas collected at Kap Kane, probably near the top of the volcanic sequence. The extrusive volcanic activity probably started already in late Cretaceous time, as in­dicated by fossil plant remains, found in sediments interbedded with the lavas on Lockwood 0.

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