Decreasing overflow from the Nordic seas into the Atlantic Ocean through the Faroe Bank channel since 1950

Nature ◽  
2001 ◽  
Vol 411 (6840) ◽  
pp. 927-930 ◽  
Author(s):  
Bogi Hansen ◽  
William R. Turrell ◽  
Svein Østerhus
Keyword(s):  
Atlantic Ocean ◽  
Nordic Seas

Asynchronous deposition of ice-rafted layers in the Nordic seas and North Atlantic Ocean

Nature ◽  
10.1038/22510 ◽  
1999 ◽  
Vol 400 (6742) ◽  
pp. 348-351 ◽  
Author(s):  
J. A. Dowdeswell ◽  
A. Elverhøi ◽  
J. T. Andrews ◽  
D. Hebbeln
Keyword(s):  
Atlantic Ocean ◽  
North Atlantic ◽  
North Atlantic Ocean ◽  
Nordic Seas

Nordic Seas Hydrography in the Context of Arctic and North Atlantic Ocean Dynamics

2021 ◽  
Vol 51 (1) ◽  
pp. 101-114
Author(s):  
J. S. Kenigson ◽  
M.-L. Timmermans
Keyword(s):  
Atlantic Ocean ◽  
Arctic Ocean ◽  
North Atlantic ◽  
North Atlantic Ocean ◽  
Ocean Dynamics ◽  
Nordic Seas ◽  
Convective Mixing ◽  
The North ◽  
Unified View ◽  
The North Atlantic

AbstractThe hydrography of the Nordic seas, a critical site for deep convective mixing, is controlled by various processes. On one hand, Arctic Ocean exports are thought to freshen the North Atlantic Ocean and the Nordic seas, as in the Great Salinity Anomalies (GSAs) of the 1970s–1990s. On the other hand, the salinity of the Nordic seas covaries with that of the Atlantic inflow across the Greenland–Scotland Ridge, leaving an uncertain role for Arctic Ocean exports. In this study, multidecadal time series (1950–2018) of the Nordic seas hydrography, Subarctic Front (SAF) in the North Atlantic Ocean [separating the water masses of the relatively cool, fresh Subpolar Gyre (SPG) from the warm, saline Subtropical Gyre (STG)], and atmospheric forcing are examined and suggest a unified view. The Nordic seas freshwater content is shown to covary on decadal time scales with the position of the SAF. When the SPG is strong, the SAF shifts eastward of its mean position, increasing the contribution of subpolar relative to subtropical source water to the Atlantic inflow, and vice versa. This suggests that Arctic Ocean fluxes primarily influence the hydrography of the Nordic seas via indirect means (i.e., by freshening the SPG). Case studies of two years with anomalous NAO conditions illustrate how North Atlantic Ocean dynamics relate to the position of the SAF (as indicated by hydrographic properties and stratification changes in the upper water column), and therefore to the properties of the Atlantic inflow and Nordic seas.

Increased ocean heat transport into the Nordic Seas and Arctic Ocean over the period 1993-2016

2021 ◽  
Author(s):  
Takamasa Tsubouchi ◽  
Kjetil Våge ◽  
Bogi Hansen ◽  
Karin Larsen ◽  
Svein Østerhus ◽  
...  
Keyword(s):  
Atlantic Ocean ◽  
Arctic Ocean ◽  
Heat Transport ◽  
Volume Transport ◽  
Meridional Overturning Circulation ◽  
Ocean Heat Transport ◽  
Overturning Circulation ◽  
Sea Ice Extent ◽  
Nordic Seas ◽  
Poleward Heat Transport

<div> <p>Warm water of subtropical-origin flows northward in the Atlantic Ocean and transports heat to high latitudes. This poleward heat transport has been implicated as one possible cause of the declining sea ice extent and increasing ocean temperatures across the Nordic Seas and Arctic Ocean, but robust estimates are still lacking. Here we use a box inverse model and over 20 years of volume transport measurements to show that the mean ocean heat transport was 305±26 TW for 1993-2016. A significant increase of 21 TW occurred after 2001, which is sufficient to account for the recent accumulation of heat in the northern seas. Therefore, ocean heat transport may have been a major contributor to climate change since the late 1990s. This increased heat transport contrasts with the Atlantic Meridional Overturning Circulation (AMOC) slowdown at mid-latitudes and indicates a discontinuity of the overturning circulation measured at different latitudes in the Atlantic Ocean.</p> </div>

scholarly journals Recent evolution of 129I levels in the Nordic Seas and the North Atlantic Ocean

2018 ◽  
Vol 621 ◽  
pp. 376-386 ◽  
Author(s):  
Carlos Vivo-Vilches ◽  
José María López-Gutiérrez ◽  
Raúl Periáñez ◽  
Charlotte Marcinko ◽  
Frédéric Le Moigne ◽  
...  
Keyword(s):  
Atlantic Ocean ◽  
North Atlantic ◽  
North Atlantic Ocean ◽  
Nordic Seas ◽  
The North ◽  
The North Atlantic

scholarly journals Anthropogenic carbon distributions in the Atlantic Ocean: data-based estimates from the Arctic to the Antarctic

2008 ◽  
Vol 5 (2) ◽  
pp. 1421-1443 ◽  
Author(s):  
M. Vázquez-Rodríguez ◽  
F. Touratier ◽  
C. Lo Monaco ◽  
D. W. Waugh ◽  
X. A. Padin ◽  
...  
Keyword(s):  
Atlantic Ocean ◽  
Southern Ocean ◽  
The Arctic ◽  
Spatial Distributions ◽  
Observational Methods ◽  
High Quality ◽  
Nordic Seas ◽  
Anthropogenic Carbon ◽  
Ocean Models ◽  
The Antarctic

Abstract. Five of the most recent observational methods to estimate anthropogenic CO2 (Cant) are applied to a high-quality dataset from five representative sections of the Atlantic Ocean extending from the Arctic to the Antarctic. Between latitudes 60° N–40° S all methods give similar spatial distributions and magnitude of Cant. Conversely, large discrepancies are found in the Southern Ocean and Nordic Seas. The differences in the Southern Ocean have a significant impact on the anthropogenic carbon inventories. The calculated total inventories of Cant for the Atlantic referred to 1994 range from 48 to 67 Pg (1015 g) of carbon, with an average of 54±8 Pg C, which is higher than previous estimates. These results, both the detailed Cant distributions and extrapolated inventories, will help to validate biogeochemical ocean models and coupled climate-carbon models.

scholarly journals Anthropogenic carbon distributions in the Atlantic Ocean: data-based estimates from the Arctic to the Antarctic

2009 ◽  
Vol 6 (3) ◽  
pp. 439-451 ◽  
Author(s):  
M. Vázquez-Rodríguez ◽  
F. Touratier ◽  
C. Lo Monaco ◽  
D. W. Waugh ◽  
X. A. Padin ◽  
...  
Keyword(s):  
Atlantic Ocean ◽  
Southern Ocean ◽  
The Arctic ◽  
Spatial Distributions ◽  
Observational Methods ◽  
High Quality ◽  
Nordic Seas ◽  
Anthropogenic Carbon ◽  
Ocean Models ◽  
The Antarctic

Abstract. Five of the most recent observational methods to estimate anthropogenic CO2 (Cant) are applied to a high-quality dataset from five representative sections of the Atlantic Ocean extending from the Arctic to the Antarctic. Between latitudes 60° N–40° S all methods give similar spatial distributions and magnitude of Cant. However, discrepancies are found in some regions, in particular in the Southern Ocean and Nordic Seas. The differences in the Southern Ocean have a significant impact on the anthropogenic carbon inventories. The calculated total inventories of Cant for the Atlantic referred to 1994 vary from 48 to 67 Pg (1015 g) of carbon, with an average of 54±8 Pg C, which is higher than previous estimates. These results, both the detailed Cant distributions and extrapolated inventories, will help to evaluate biogeochemical ocean models and coupled climate-carbon models.

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