scholarly journals Moisture sources and synoptic to seasonal variability of North Atlantic water vapor isotopic composition

2015 ◽  
Vol 120 (12) ◽  
pp. 5757-5774 ◽  
Author(s):  
H. C. Steen-Larsen ◽  
A. E. Sveinbjörnsdottir ◽  
Th. Jonsson ◽  
F. Ritter ◽  
J.-L. Bonne ◽  
...  
Keyword(s):  
Water Vapor ◽  
Isotopic Composition ◽  
North Atlantic ◽  
Seasonal Variability ◽  
Atlantic Water ◽  
Moisture Sources ◽  
North Atlantic Water

Exploratory analyses of trichlorofluoromethane (F-11) in North Atlantic water columns

1978 ◽  
Vol 5 (8) ◽  
pp. 645-648 ◽  
Author(s):  
Paul M. Hammer ◽  
J. M. Hayes ◽  
W. J. Jenkins ◽  
R. B. Gagosian
Keyword(s):  
North Atlantic ◽  
Atlantic Water ◽  
Water Columns ◽  
North Atlantic Water

scholarly journals Paleoenvironments along the Eastern Laurentide Ice Sheet Margin and Timing of the Last Ice Maximum and Retreat

2008 ◽  
Vol 41 (2) ◽  
pp. 265-277 ◽  
Author(s):  
Anne de Vernal ◽  
Claude Hillaire-Marcel
Keyword(s):  
Late Pleistocene ◽  
North Atlantic ◽  
Environmental Changes ◽  
Atlantic Water ◽  
Polar Front ◽  
Water Masses ◽  
Labrador Sea ◽  
Eastern Canada ◽  
North Atlantic Water ◽  
Late Wisconsinan

ABSTRACT Palynological and isotopic analysis in a few deep-sea cores from the Labrador Sea reveals strong environmental changes related to the Late Pleistocene glacial fluctuations over eastern Canada. On the whole, the Labrador Sea was characterized by strong exchanges between North Atlantic water masses, Arctic outflows, and meltwater discharges from Laurentide, Greenland and lnuitian ice sheets. The penetration of temperate Atlantic waters persisted throughout most of the Late Pleistocene, with a brief interruption during the Late Wisconsinan. During this glacial substage, a slight but continuous meltwater runoff from the Laurentide ice margins grounded on the northern Labrador Shelf is indicated by relatively low 18O values and low-salinity (< 30‰) dinocyst assemblages. The calving of the ice margin, the melwater outflow and the subsequent dilution of surface waters offshore Labrador probably contributed to the dispersal of floating ice and, consequently, to a southward displacement of the polar front restraining the penetration of North Atlantic waters into the Labrador Sea. The advection of southern air masses along the Laurentide ice margins, shown by pollen assemblages, was favourable to abundant precipitation and therefore, high ice accumulation rates, especially over northern Labrador during the Late Wisconsinan. The déglaciation is marked by a brief, but significant, melting event of northern Laurentide ice shortly after 17 ka. The main glacial retreat occurred after ca. 11 ka. It allowed restoration of WSW-ENE atmospheric trajectories, increased phytoplanktonic productivity, and penetration of North Atlantic water masses into the Labrador Sea.

scholarly journals Role of cabbeling in water densification in the Greenland Basin

2008 ◽  
Vol 5 (3) ◽  
pp. 507-543
Author(s):  
Y. Kasajima ◽  
T. Johannessen
Keyword(s):  
North Atlantic ◽  
Maximum Velocity ◽  
Atlantic Water ◽  
The Arctic ◽  
Greenland Sea ◽  
Water Types ◽  
North Atlantic Water ◽  
Greenland Basin ◽  
Eastern Periphery ◽  
Induced Velocity

Abstract. The contribution of cabbeling mixing to water mass modification in the Greenland Sea was explored from hydrographic observation across the Greenland Basin in summer 2006. Neutral surface was chosen as a reference frame, and the strength of cabbeling mixing was determined by the dianeutral velocity magnitude. Water types in the area were classified into North Atlantic Water (NAW), modified North Atlantic Water (mNAW), water from Barents Sea near Bear Island (BIW), Arctic Intermediate Water (AIW) and Deep Water (DW), and significant cabbeling-induced velocity (>1 m/day) appeared at the interfaces of these water types below the seasonal pycnocline. The mixing between BIW and NAW in the eastern periphery was the most vigorous, where mixing-induced velocity reached 7.5 m/day which accompanied NAW production of 123 m3/day through transformation of BIW. Cabbeling in the Arctic Frontal Zone was found of two types; mixing within NAW in the upper layer and mixing within mNAW in the lower layer with a maximum velocity of 3 m/day. Source waters in the central Greenland Basin were AIW and mNAW and produced a vertical velocity of 4 m/day. In the western part of the Greenland Basin, the areas of active cabbeling were widely separated and each mixing point appeared rather weak, with a maximum velocity of 2.5 m/day. The average density gain in the eastern periphery was 0.003 kg/m3 while it was 0.001 kg/m3 in the other areas, though the impact of cabbeling on the bulk buoyancy change was highest in the western Greenland Sea. The frontal areas occupied approximately 50% of the whole analysis area and the total density gain due to cabbeling mixing in the Greenland Basin as a whole was estimated as 6.7×10−4 kg/m3.

scholarly journals Stability of North Atlantic water masses in face of pronounced climate variability during the Pleistocene

2004 ◽  
Vol 19 (2) ◽  
pp. n/a-n/a ◽  
Author(s):  
M. E. Raymo ◽  
D. W. Oppo ◽  
B. P. Flower ◽  
D. A. Hodell ◽  
J. F. McManus ◽  
...  
Keyword(s):  
Climate Variability ◽  
North Atlantic ◽  
Atlantic Water ◽  
Water Masses ◽  
North Atlantic Water

scholarly journals North Atlantic Water in the Barents Sea Opening, 1997 to 1999

2001 ◽  
Vol 20 (2) ◽  
pp. 209-216 ◽  
Author(s):  
Jane O’Dwyer ◽  
Yoshie Kasajima ◽  
Ole Anders Nøst
Keyword(s):  
North Atlantic ◽  
Barents Sea ◽  
Atlantic Water ◽  
The Barents Sea ◽  
North Atlantic Water

scholarly journals North Atlantic Water in the Barents Sea Opening, 1997 to 1999

2001 ◽  
Vol 20 (2) ◽  
pp. 209-216 ◽  
Author(s):  
Jane O'Dwyer ◽  
Yoshie Kasajima ◽  
Ole Anders Nøst
Keyword(s):  
North Atlantic ◽  
Barents Sea ◽  
Atlantic Water ◽  
The Barents Sea ◽  
North Atlantic Water

scholarly journals How much did Glacial North Atlantic Water shoal?

2014 ◽  
Vol 29 (3) ◽  
pp. 190-209 ◽  
Author(s):  
Geoffrey Gebbie
Keyword(s):  
North Atlantic ◽  
Atlantic Water ◽  
North Atlantic Water
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