North American origin of “pink–white” layers at the Mendeleev Ridge (Arctic Ocean): New insights from lead and neodymium isotope composition of detrital sediment component

2017 ◽  
Vol 386 ◽  
pp. 44-55 ◽  
Author(s):  
E. Bazhenova ◽  
N. Fagel ◽  
R. Stein
Keyword(s):  
Arctic Ocean ◽  
North American ◽  
Isotope Composition ◽  
Sediment Component ◽  
Detrital Sediment

The dissolved Beryllium isotope composition of the Arctic Ocean

2009 ◽  
Vol 73 (20) ◽  
pp. 6114-6133 ◽  
Author(s):  
M. Frank ◽  
D. Porcelli ◽  
P. Andersson ◽  
M. Baskaran ◽  
G. Björk ◽  
...  
Keyword(s):  
Arctic Ocean ◽  
Isotope Composition ◽  
The Arctic ◽  
The Arctic Ocean ◽  
Beryllium Isotope

scholarly journals Donald R. Rothwell, Arctic Ocean Shipping: Navigation, Security and Sovereignty in the North American Arctic (Leiden: Brill, 2018)

2020 ◽  
Vol 15 (1) ◽  
Author(s):  
Snjólaug Árnadóttir
Keyword(s):  
Arctic Ocean ◽  
North American ◽  
The North ◽  
Ocean Shipping ◽  
North American Arctic

A review of the book: Donald R. Rothwell, Arctic Ocean Shipping: Navigation, Security and Sovereignty in the North American Arctic (Leiden: Brill, 2018)

scholarly journals A Benchmark for Trace Greenhouse Gases in the Arctic Ocean

Eos ◽  
2017 ◽  
Author(s):  
Terri Cook
Keyword(s):  
Nitrous Oxide ◽  
Greenhouse Gases ◽  
Arctic Ocean ◽  
North American ◽  
The Arctic ◽  
The North ◽  
The Arctic Ocean ◽  
North American Arctic

Samples of seawater from the North American Arctic show that the region is neither a major source nor sink of methane and nitrous oxide to the overlying atmosphere.

scholarly journals Glacial–interglacial Nd isotope variability of North Atlantic Deep Water modulated by North American ice sheet

2019 ◽  
Vol 10 (1) ◽  
Author(s):  
Ning Zhao ◽  
Delia W. Oppo ◽  
Kuo-Fang Huang ◽  
Jacob N. W. Howe ◽  
Jerzy Blusztajn ◽  
...  
Keyword(s):  
Ocean Circulation ◽  
North Atlantic ◽  
Deep Water ◽  
North American ◽  
Isotope Composition ◽  
Ice Sheet ◽  
North Atlantic Deep Water ◽  
Water Masses ◽  
Nd Isotope ◽  
Nd Isotope Composition

AbstractThe Nd isotope composition of seawater has been used to reconstruct past changes in the contribution of different water masses to the deep ocean. In the absence of contrary information, the Nd isotope compositions of endmember water masses are usually assumed constant during the Quaternary. Here we show that the Nd isotope composition of North Atlantic Deep Water (NADW), a major component of the global overturning ocean circulation, was significantly more radiogenic than modern during the Last Glacial Maximum (LGM), and shifted towards modern values during the deglaciation. We propose that weathering contributions of unradiogenic Nd modulated by the North American Ice Sheet dominated the evolution of the NADW Nd isotope endmember. If water mass mixing dominated the distribution of deep glacial Atlantic Nd isotopes, our results would imply a larger fraction of NADW in the deep Atlantic during the LGM and deglaciation than reconstructed with a constant northern endmember.

Isotopic analysis of Cd in the mixing zone of Siberian rivers with the Arctic Ocean—New constraints on marine Cd cycling and the isotope composition of riverine Cd

2013 ◽  
Vol 361 ◽  
pp. 64-73 ◽  
Author(s):  
Myriam Lambelet ◽  
Mark Rehkämper ◽  
Tina van de Flierdt ◽  
Zichen Xue ◽  
Katharina Kreissig ◽  
...  
Keyword(s):  
Arctic Ocean ◽  
Isotope Composition ◽  
Isotopic Analysis ◽  
The Arctic ◽  
Mixing Zone ◽  
The Arctic Ocean

scholarly journals Carbon dynamics in the western Arctic Ocean: insights from full-depth carbon isotope profiles of DIC, DOC, and POC

2012 ◽  
Vol 9 (3) ◽  
pp. 1217-1224 ◽  
Author(s):  
D. R. Griffith ◽  
A. P. McNichol ◽  
L. Xu ◽  
F. A. McLaughlin ◽  
R. W. Macdonald ◽  
...  
Keyword(s):  
Organic Carbon ◽  
Arctic Ocean ◽  
Carbon Isotope ◽  
Dissolved Inorganic Carbon ◽  
Isotope Composition ◽  
Canada Basin ◽  
The Arctic ◽  
Arctic Ecosystems ◽  
The Arctic Ocean

Abstract. Arctic warming is projected to continue throughout the coming century. Yet, our currently limited understanding of the Arctic Ocean carbon cycle hinders our ability to predict how changing conditions will affect local Arctic ecosystems, regional carbon budgets, and global climate. We present here the first set of concurrent, full-depth, dual-isotope profiles for dissolved inorganic carbon (DIC), dissolved organic carbon (DOC), and suspended particulate organic carbon (POCsusp) at two sites in the Canada Basin of the Arctic Ocean. The carbon isotope composition of sinking and suspended POC in the Arctic contrasts strongly with open ocean Atlantic and Pacific sites, pointing to a combination of inputs to Arctic POCsusp at depth, including surface-derived organic carbon (OC), sorbed/advected OC, and OC derived from in situ DIC fixation. The latter process appears to be particularly important at intermediate depths, where mass balance calculations suggest that OC derived from in situ DIC fixation contributes up to 22% of POCsusp. As in other oceans, surface-derived OC is still a dominant source to Arctic POCsusp. Yet, we suggest that significantly smaller vertical POC fluxes in the Canada Basin make it possible to see evidence of DIC fixation in the POCsusp pool even at the bulk isotope level.

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