Spatial Variability of Major Frontal Systems in the North Atlantic-Norwegian Sea Area: 1980–81

1984 ◽  
Vol 14 (1) ◽  
pp. 185-192 ◽  
Author(s):  
Jeffrey H. Smart
Keyword(s):  
Spatial Variability ◽  
North Atlantic ◽  
Norwegian Sea ◽  
The North ◽  
Frontal Systems ◽  
The North Atlantic ◽  
Sea Area

scholarly journals Polymastiidae (Porifera: Demospongiae) of the Nordic and Siberian Seas

2017 ◽  
Vol 98 (6) ◽  
pp. 1273-1335 ◽  
Author(s):  
Alexander Plotkin ◽  
Elena Gerasimova ◽  
Hans Tore Rapp
Keyword(s):  
North Atlantic ◽  
Related Species ◽  
Molecular Data ◽  
Wide Distribution ◽  
Morphological Data ◽  
Nordic Seas ◽  
Norwegian Sea ◽  
The North ◽  
Western Norway ◽  
The North Atlantic

Polymastiidae (Porifera: Demospongiae) of the Nordic and Siberian Seas are revised and compared with the related species of the North Atlantic based on the morphological data from the type and comparative material and the molecular data from fresh samples. Twenty species from six polymastiid genera are recorded. Two species,Polymastia svensenifrom Western Norway andSpinularia njordifrom the Norwegian Sea, are new to science. One species,Polymastia andrica, is new to the Nordic Seas and two species,Polymastiacf.bartlettiandP. penicillus, are new to the Scandinavian Coast. Distribution of the polymastiids in the North Atlantic and Arctic is discussed and the allegedly wide distribution ofSpinularia sarsiiandS. spinulariais questioned.

scholarly journals Seasonal Barotropic Modulation of the Deep-Water Overflow through the Faroe Bank Channel

2006 ◽  
Vol 36 (12) ◽  
pp. 2328-2339 ◽  
Author(s):  
Iréne Lake ◽  
Peter Lundberg
Keyword(s):  
North Atlantic ◽  
Deep Water ◽  
Satellite Altimetry ◽  
North Atlantic Ocean ◽  
Norwegian Sea ◽  
The North ◽  
Flow Through ◽  
The North Atlantic ◽  
Water Overflow

Abstract As a joint Nordic project, an upward-looking ADCP has been maintained at the sill of the Faroe Bank Channel from 1995 onward. Records from a period in 1998 with three current meters deployed across the channel were used to demonstrate that the Faroe Bank Channel deep-water transport from the Norwegian Sea into the North Atlantic Ocean proper can be reasonably well estimated from one centrally located ADCP. The long-term average of this transport over the period 1995–2001 was found to be 2.1 Sv (Sv ≡ 106 m−3 s−1). The transport record demonstrates a pronounced seasonality. Satellite altimetry shows that this is caused by the northbound Atlantic surface water inflow giving rise to a barotropic modulation of the deep-water flow through the Faroe–Shetland Channel and the southern reaches of the Norwegian Sea.

North Atlantic Ice Sheet Fluctuations 10,000–70,000 Yr Ago as Inferred from Deposits on the Reykjanes Ridge, Southeast of Greenland

1998 ◽  
Vol 49 (2) ◽  
pp. 171-182 ◽  
Author(s):  
Klas S. Lackschewitz ◽  
Karl-Heinz Baumann ◽  
Bettina Gehrke ◽  
Hans-Joachim Wallrabe-Adams ◽  
Jörn Thiede ◽  
...  
Keyword(s):  
Surface Water ◽  
North Atlantic ◽  
Ice Sheet ◽  
North Atlantic Current ◽  
Reykjanes Ridge ◽  
Norwegian Sea ◽  
The North ◽  
Warm Surface Water ◽  
The North Atlantic ◽  
Ird Events

Marine records from the Reykjanes Ridge indicate ice sheet variations and abrupt climate changes. One of these records, ice-rafted detritus (IRD), serves as a proxy for iceberg discharges that probably indicates ice sheet fluctuations. The IRD records suggest that iceberg discharge 68,000–10,000 yr B.P. happened more frequently than the 7000- to 10,000-yr spacing of the Heinrich events. An IRD peak 67,000 to 63,000 yr B.P. further suggests that the Middle Weichselian glaciation started about 12,000 yr earlier in the North Atlantic than in the Norwegian Sea. Several later IRD events, in contrast, correlate with Norwegian Sea IRD-rich layers and imply coeval ice sheet advances in the North Atlantic and the Norwegian Sea. Coccoliths in a core from the Reykjanes Ridge show distinct peaks in species that record occasional inflow of warm surface water during the last glaciation, as previously reported from the eastern Labrador Sea. High abundances of coccoliths, together with a decrease of Neogloboquadrina pachyderma sin. and relatively low δ18O values, imply enhanced advection of the North Atlantic Current 69,000–67,000 yr B.P., 56,000–54,000 yr B.P., 35,000–33,000 yr B.P., and 26,000–23,000 yr B.P. This advection provided a regional moisture source for extension of ice sheets onto the shelf. In contrast, most of the IRD events are characterized by cold polar surface water masses indicating rapid variations in ocean surface conditions.

scholarly journals Spatially explicit estimates of stocks sizes, structure and biomass of herring and blue whiting, and catch data of bluefin tuna

2014 ◽  
Vol 7 (2) ◽  
pp. 457-493
Author(s):  
G. Huse ◽  
B. R. MacKenzie ◽  
V. Trenkel ◽  
M. Doray ◽  
L. Nøttestad ◽  
...  
Keyword(s):  
North Atlantic ◽  
Bluefin Tuna ◽  
The Other ◽  
Spatially Explicit ◽  
Strong Reduction ◽  
Norwegian Sea ◽  
Blue Whiting ◽  
Catch Data ◽  
The North ◽  
Sea Area

Abstract. The north Atlantic is a productive marine region which has supported important commercial fisheries for centuries. Many of these fisheries have exploited the pelagic species, including herring, blue whiting and tuna. Here we present data on the distribution of herring and blue whiting based on surveys in the Norwegian Sea, the Bay of Biscay and Celtic Sea. We also present catch data on bluefin tuna, which has been depleted for decades, but historically used to be a key predator on the other pelagic stocks during summer. The results show that there have been substantial changes in the herring and blue whiting distribution during the 1990s and early 2000s. The earliest bluefin tuna catches noted were in 1907. The catches in the Norwegian Sea area peaked in the 1950s and there have been very small catches since the 1980s. The catches in the Mediterranean on the other hand peaked in the late 1990, and had subsequently a strong reduction.

scholarly journals The 4.2 ka BP event in the Levant

2018 ◽  
Author(s):  
David Kaniewski ◽  
Nick Marriner ◽  
Rachid Cheddadi ◽  
Joël Guiot ◽  
Elise Van Campo
Keyword(s):  
North Atlantic ◽  
Dead Sea ◽  
Southern Levant ◽  
Eastern Basin ◽  
Climate Shift ◽  
The North ◽  
Altered Precipitation ◽  
Climate Patterns ◽  
The North Atlantic ◽  
Sea Area

Abstract. The 4.2 ka BP event is defined as a phase of environmental stress characterized by severe and prolonged drought of global extent. The event is recorded from the North Atlantic through Europe to Asia, leading scientists to evoke a 300-yr global mega-drought. Focusing on the Mediterranean and the Near East, this abrupt climate episode radically altered precipitation, with an estimated 30–50 % drop in precipitation in the eastern basin. While many studies reveal similar trends in the northern Mediterranean (from Spain to Turkey and the northern Levant), data from northern Africa and central/southern Levant are more nuanced, suggesting a weaker imprint of this climate shift on the environment and/or different climate patterns. Here, we provide a synthesis of environmental reconstructions for the Levant and show that, while the 4.2 ka BP event also corresponds to a drier period, a different climate pattern emerges in the central/southern Levant, with two dry phases framing a wetter period, suggesting a W-shaped event, particularly well defined by records from the Dead Sea area.

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