scholarly journals Bathymetric map of southern Northwind Ridge and vicinity, Arctic Ocean

1991 ◽  
Author(s):  
Michael W. Mullen ◽  
Arthur Grantz
Keyword(s):  
Arctic Ocean ◽  
Northwind Ridge ◽  
Bathymetric Map

Summary of lithostratigraphy and stratigraphic correlations in piston cores from Northwind Ridge, Arctic Ocean, from USCGC Polar Star, 1988

1992 ◽  
Author(s):  
R.L. Phillips ◽  
Arthur Grantz ◽  
M.W. Mullen ◽  
Hugh J. Rieck ◽  
M.W. McLaughlin ◽  
...  
Keyword(s):  
Arctic Ocean ◽  
Northwind Ridge

Plio-Pleistocene sedimentary record from the Northwind Ridge: new insights into paleoclimatic evolution of the western Arctic Ocean for the last 5 Ma

arktos ◽  
2018 ◽  
Vol 4 (1) ◽  
pp. 1-23 ◽  
Author(s):  
Geoffrey R. Dipre ◽  
Leonid Polyak ◽  
Anton B. Kuznetsov ◽  
Emma A. Oti ◽  
Joseph D. Ortiz ◽  
...  
Keyword(s):  
Arctic Ocean ◽  
Sedimentary Record ◽  
Western Arctic Ocean ◽  
Western Arctic ◽  
Northwind Ridge

scholarly journals Sedimentary organic matter and carbonate variations in the Chukchi Borderland in association with ice sheet and ocean-atmosphere dynamics over the last 155 kyr

2011 ◽  
Vol 8 (12) ◽  
pp. 3545-3553 ◽  
Author(s):  
S. F. Rella ◽  
M. Uchida
Keyword(s):  
Organic Carbon ◽  
Arctic Ocean ◽  
Size Fraction ◽  
Transport Processes ◽  
The Arctic ◽  
Intermediate Water ◽  
Piston Core ◽  
Beaufort Gyre ◽  
Hemispheric Temperature ◽  
Northwind Ridge

Abstract. Knowledge on past variability of sedimentary organic carbon in the Arctic Ocean is important to assess natural carbon cycling and transport processes related to global climate changes. However, the late Pleistocene oceanographic history of the Arctic is still poorly understood. In the present study we show sedimentary records of total organic carbon (TOC), CaCO3, benthic foraminiferal δ18O and the coarse grain size fraction from a piston core recovered from the northern Northwind Ridge in the far western Arctic Ocean, a region potentially sensitively responding to past variability in surface current regimes and sedimentary processes such as coastal erosion. An age model based on oxygen stratigraphy, radiocarbon dating and lithological constraints suggests that the piston core records paleoenvironmental changes of the last 155 kyr. TOC shows orbital-scale increases and decreases that can be respectively correlated to the waxing and waning of large ice sheets dominating the Eurasian Arctic, suggesting advection of fine suspended matter derived from glacial erosion to the Northwind Ridge by eastward flowing intermediate water and/or surface water and sea ice during cold episodes of the last two glacial-interglacial cycles. At millennial scales, increases in TOC might correlate to a suite of Dansgaard-Oeschger Stadials between 120 and 45 ka before present (BP) indicating a possible response to abrupt northern hemispheric temperature changes. Between 70 and 45 ka BP, closures and openings of the Bering Strait could have additionally influenced TOC variability. CaCO3 content tends to anti-correlate with TOC on both orbital and millennial time scales, which we interpret in terms of enhanced sediment advection from the carbonate-rich Canadian Arctic via an extended Beaufort Gyre during warm periods of the last two glacial-interglacial cycles and increased organic carbon advection from the Siberian Arctic during cold periods when the Beaufort Gyre contracted. We propose that this pattern may be related to orbital- and millennial-scale variations of dominant atmospheric surface pressure systems expressed in mode shifts of the Arctic Oscillation.

scholarly journals Diatom composition and fluxes over the Northwind Ridge, western Arctic Ocean: Impacts of marine surface circulation and sea ice distribution

2020 ◽  
Vol 186 ◽  
pp. 102377 ◽  
Author(s):  
Jian Ren ◽  
Jianfang Chen ◽  
Youcheng Bai ◽  
Marie-Alexandrine Sicre ◽  
Zhixiong Yao ◽  
...  
Keyword(s):  
Sea Ice ◽  
Arctic Ocean ◽  
Western Arctic Ocean ◽  
Surface Circulation ◽  
Marine Surface ◽  
Western Arctic ◽  
Northwind Ridge

scholarly journals Multibeam Bathymetry and CTD-Measurements in two fjord systems in Southeast Greenland

2017 ◽  
Author(s):  
Kristian Kjellerup Kjeldsen ◽  
Wilhelm Weinrebe ◽  
Jørgen Bendtsen ◽  
Anders Anker Bjørk ◽  
Kurt Henrik Kjær
Keyword(s):  
Arctic Ocean ◽  
Bottom Water ◽  
Outer Part ◽  
Satellite Observations ◽  
Water Masses ◽  
The Arctic ◽  
Multibeam Bathymetry ◽  
The Arctic Ocean ◽  
Bathymetric Map ◽  
Subglacial Meltwater

Abstract. We present bathymetry and hydrological observations collected in the summer of 2014 from two fjord systems in Southeast Greenland, using SS Activ with a multibeam system temporally installed over the side of the ship. Our results provide a detailed bathymetric map of the fjord complex around Skjoldungen Island and the outer part of Timmiarmiut Fjord and show far greater depths compared to the International Bathymetric Chart of the Arctic Ocean. The hydrography collected show different properties in the fjords with the bottom water masses below 240 m in Timmiarmiut Fjord being 1–2 °C warmer than in the two fjords around Skjoldungen Island, but data also illustrate the influence of sills on the exchange of deeper water masses within fjords. Moreover, evidence of subglacial discharge in Timmiarmiut Fjord, consistent with satellite observations of ice mélange set into motion, adds to our increasing understanding of the distribution of subglacial meltwater. Data is available through the PANGAEA website https://doi.pangaea.de/10.1594/PANGAEA.860627.

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