Deep Water Masses and Sediments Are Main Compartments for Polychlorinated Biphenyls in the Arctic Ocean

2014 ◽  
Vol 48 (12) ◽  
pp. 6719-6725 ◽  
Author(s):  
Anna Sobek ◽  
Örjan Gustafsson
Keyword(s):  
Polychlorinated Biphenyls ◽  
Arctic Ocean ◽  
Deep Water ◽  
Water Masses ◽  
The Arctic ◽  
The Arctic Ocean

scholarly journals Arctic Deep Water Ferromanganese‐Oxide Deposits Reflect the Unique Characteristics of the Arctic Ocean

2017 ◽  
Vol 18 (11) ◽  
pp. 3771-3800 ◽  
Author(s):  
James R. Hein ◽  
Natalia Konstantinova ◽  
Mariah Mikesell ◽  
Kira Mizell ◽  
Jessica N. Fitzsimmons ◽  
...  
Keyword(s):  
Arctic Ocean ◽  
Deep Water ◽  
The Arctic ◽  
The Arctic Ocean

The contribution of the Greenland and Barents seas to the deep water of the Arctic Ocean

1983 ◽  
Vol 88 (C10) ◽  
pp. 5981 ◽  
Author(s):  
James H. Swift ◽  
Taro Takahashi ◽  
Hugh D. Livingston
Keyword(s):  
Arctic Ocean ◽  
Deep Water ◽  
The Arctic ◽  
The Arctic Ocean

scholarly journals Deep water circulation and composition in the Arctic Ocean by dissolved barium, aluminium and silicate

2012 ◽  
Vol 132-133 ◽  
pp. 56-67 ◽  
Author(s):  
T. Roeske ◽  
M. Rutgers vd Loeff ◽  
R. Middag ◽  
K. Bakker
Keyword(s):  
Arctic Ocean ◽  
Deep Water ◽  
Water Circulation ◽  
The Arctic ◽  
The Arctic Ocean

scholarly journals Deep-Water Flow over the Lomonosov Ridge in the Arctic Ocean

2005 ◽  
Vol 35 (8) ◽  
pp. 1489-1493 ◽  
Author(s):  
M-L. Timmermans ◽  
P. Winsor ◽  
J. A. Whitehead
Keyword(s):  
Arctic Ocean ◽  
Deep Water ◽  
Thermohaline Circulation ◽  
Global Climate ◽  
Volume Flow Rate ◽  
The Arctic ◽  
Lomonosov Ridge ◽  
Geothermal Heat ◽  
The Arctic Ocean ◽  
Canadian Basin

Abstract The Arctic Ocean likely impacts global climate through its effect on the rate of deep-water formation and the subsequent influence on global thermohaline circulation. Here, the renewal of the deep waters in the isolated Canadian Basin is quanitified. Using hydraulic theory and hydrographic observations, the authors calculate the magnitude of this renewal where circumstances have thus far prevented direct measurements. A volume flow rate of Q = 0.25 ± 0.15 Sv (Sv ≡ 106 m3 s−1) from the Eurasian Basin to the Canadian Basin via a deep gap in the dividing Lomonosov Ridge is estimated. Deep-water renewal time estimates based on this flow are consistent with 14C isolation ages. The flow is sufficiently large that it has a greater impact on the Canadian Basin deep water than either the geothermal heat flux or diffusive fluxes at the deep-water boundaries.

scholarly journals Elevated sources of cobalt in the Arctic Ocean

2020 ◽  
Author(s):  
Randelle M. Bundy ◽  
Alessandro Tagliabue ◽  
Nicholas J. Hawco ◽  
Peter L. Morton ◽  
Benjamin S. Twining ◽  
...  
Keyword(s):  
Arctic Ocean ◽  
North Atlantic ◽  
Deep Water ◽  
Deep Ocean ◽  
The Arctic ◽  
Biogeochemical Model ◽  
Shelf Area ◽  
The North ◽  
The Arctic Ocean ◽  
High Concentrations

Abstract. Cobalt (Co) is an important bioactive trace metal that can limit or co-limit phytoplankton growth in many regions of the ocean. Total dissolved and labile Co measurements in the Canadian sector of the Arctic Ocean during U.S. GEOTRACES Arctic expedition (GN01) and the Canadian International Polar Year-GEOTRACES expedition (GIPY14) revealed a dynamic biogeochemical cycle for Co in this basin. The major sources of Co in the Arctic were from shelf regions and rivers, with only minimal contributions from other freshwater sources (sea ice, snow) and aeolian deposition. The most striking feature was the extremely high concentrations of dissolved Co in the upper 100 m, with concentrations routinely exceeding 800 pmol L−1 over the shelf regions. This plume of high Co persisted throughout the Arctic basin and extended to the North Pole, where sources of Co shifted from primarily shelf-derived to riverine, as freshwater from Arctic rivers was entrained in the Transpolar Drift. Dissolved Co was also strongly organically-complexed in the Arctic, ranging from 70–100 % complexed in the surface and deep ocean, respectively. Deep water concentrations of dissolved Co were remarkably consistent throughout the basin (~ 55 pmol L−1), with concentrations reflecting those of deep Atlantic water and deep ocean scavenging of dissolved Co. A biogeochemical model of Co cycling was used to support the hypothesis that the majority of the high surface Co in the Arctic was emanating from the shelf. The model showed that the high concentrations of Co observed along the transect were due to the large shelf area of the Arctic, as well as dampened scavenging of Co by manganese (Mn)-oxidizing bacteria due to the lower temperatures. The majority of this scavenging appears to have occurred in the upper 200 m, with minimal additional scavenging below this depth. Preliminary evidence suggests that both dissolved and labile Co are increasing over time on the Arctic shelf, and the elevated surface concentrations of Co likely leads to a net flux of Co out of the Arctic, with implications for downstream biological uptake of Co in the North Atlantic and elevated Co in North Atlantic Deep Water. Understanding the current distributions of Co in the Arctic will be important for constraining changes to Co inputs resulting from regional intensification of freshwater fluxes from ice and permafrost melt in response to ongoing climate change.

scholarly journals A High‐Resolution Geomagnetic Relative Paleointensity Record From the Arctic Ocean Deep‐Water Gateway Deposits During the Last 60 kyr

2019 ◽  
Author(s):  
Chiara Caricchi ◽  
Renata Giulia Lucchi ◽  
Leonardo Sagnotti ◽  
Patrizia Macrì ◽  
Alessio Di Roberto ◽  
...  
Keyword(s):  
High Resolution ◽  
Arctic Ocean ◽  
Deep Water ◽  
The Arctic ◽  
The Arctic Ocean ◽  
Relative Paleointensity

Spatial Distributions of DDTs in the Water Masses of the Arctic Ocean

2017 ◽  
Vol 51 (14) ◽  
pp. 7913-7919 ◽  
Author(s):  
Daniel Carrizo ◽  
Anna Sobek ◽  
Joan A. Salvadó ◽  
Örjan Gustafsson
Keyword(s):  
Arctic Ocean ◽  
Water Masses ◽  
The Arctic ◽  
Spatial Distributions ◽  
The Arctic Ocean

Organochlorine pesticides and polychlorinated biphenyls in the Arctic Ocean food web

1992 ◽  
Vol 22 (1) ◽  
pp. 41-54 ◽  
Author(s):  
B. T. Hargrave ◽  
G. C. Harding ◽  
W. P. Vass ◽  
P. E. Erickson ◽  
B. R. Fowler ◽  
...  
Keyword(s):  
Polychlorinated Biphenyls ◽  
Food Web ◽  
Arctic Ocean ◽  
Organochlorine Pesticides ◽  
The Arctic ◽  
The Arctic Ocean
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