Early Oligocene initiation of North Atlantic Deep Water formation

  title={Early Oligocene initiation of North Atlantic Deep Water formation},
  author={Richard Davies and Joe Cartwright and Jennifer Pike and C. E. R. Line},
Dating the onset of deep-water flow between the Arctic and North Atlantic oceans is critical for modelling climate change in the Northern Hemisphere and for explaining changes in global ocean circulation throughout the Cenozoic era (from about 65 million years ago to the present). In the early Cenozoic era, exchange between these two ocean basins was inhibited by the Greenland–Scotland ridge, but a gateway through the Faeroe–Shetland basin has been hypothesized. Previous estimates of the date… 

Export of nutrient rich Northern Component Water preceded early Oligocene Antarctic glaciation

The onset of the North Atlantic Deep Water formation is thought to have coincided with Antarctic ice-sheet growth about 34 million years ago (Ma). However, this timing is debated, in part due to

Onset of North Atlantic Deep Water production coincident with inception of the Cenozoic global cooling trend

Here we show that the onset of deep water overflow from the Norwegian-Greenland Sea into the North Atlantic, interpreted to represent the onset of a modern-style North Atlantic Deep Water mass,

Early Oligocene Onset of Deep-Water Production in the North Atlantic

The flow of deep-water masses is a key component of heat transport in the modern climate system, yet the role of deep-ocean heat transport during periods of extreme warmth is poorly understood. The

An Early Neogene—Early Quaternary Contourite Drift System on the SW Barents Sea Continental Margin, Norwegian Arctic

The onset and evolution of the middle to late Cenozoic “icehouse” world was influenced by the development of the global ocean circulation linking the Norwegian–Greenland Sea‐Arctic Ocean to the

Sedimentological and oceanographic change in the Northwest Atlantic Ocean across the Eocene Oligocene Transition

The Eocene-Oligocene Transition (EOT) marks the most pivotal interval in Earth’s Cenozoic transition from warm, relatively ice-free ‘greenhouse’ conditions to a cooler ‘icehouse’ climate. The EOT saw

Neogene overflow of Northern Component Water at the Greenland‐Scotland Ridge

In the North Atlantic Ocean, flow of North Atlantic Deep Water (NADW), and of its ancient counterpart Northern Component Water (NCW), across the Greenland‐Scotland Ridge (GSR) is thought to have

Bipolar Atlantic deepwater circulation in the middle-late Eocene: Effects of Southern Ocean gateway openings

We present evidence for Antarctic Circumpolar Current (ACC)-like effects on Atlantic deepwater circulation beginning in the late-middle Eocene. Modern ocean circulation is characterized by a thermal



Cenozoic sediment accumulation on drifts in the northern North Atlantic

  • C. Wold
  • Environmental Science, Geology
  • 1994
The northern North Atlantic sediment drifts have a much greater areal extent than has previously been indicated. The northern North Atlantic extends from the East Greenland to European continental

Global paleoceanography and its deep water linkage to the Antarctic glaciation

Control of North Atlantic Deep Water Circulation by the Greenland‐Scotland Ridge

Coherent bathymetric features along the Reykjanes Ridge indicate that there were significant changes in the flux of buoyant material within the Icelandic Hot Spot during the Neogene. The radial

Development of Cenozoic Abyssal Circulation South of the Greenland-Scotland Ridge

Seismic, lithostratigraphic, faunal, and isotopic evidence from the western and northern North Atlantic indicates that formation of northern sources for strongly circulating bottom water began in the

Speculations about the Paleodepth of the Greenland-Scotland Ridge During Late Mesozoic and Cenozoic Times

The Greenland-Scotland transverse ridge has separated the deep basins of the Norwegian-Greenland Sea from the main North Atlantic Ocean since the early Cenozoic. Originally, it probably formed a

Cenozoic Marine Environments in the North Atlantic and Norwegian-Greenland Sea

A warm ocean, with an abundant and diverse flora and fauna invaded the newly forming branches of the North Atlantic, first the Labrador Sea (Late Cretaceous), then, beginning with the Eocene, the

North Atlantic oceanography as possible cause of Antarctic glaciation and eutrophication

Tarling1 suggested that ice ages may occur when continental blocks occupy polar positions, isolating the pole from oceanic influences, and when nearby seas are available to provide moisture for the

North Atlantic Deep Water cools the southern hemisphere

A standard explanation for coupling climate variations in the northern and southern hemispheres involves fluctuations in North Atlantic Deep Water (NADW) production. However, I suggest that the

Cenozoic paleoclimatic and paleoceanographic changes in the northern hemisphere revealed by variability of coarse-fraction composition in sediments from the V ring Plateau - ODP Leg 104 drill sites

Coarse-fraction studies of sediments recovered during ODP Leg 104 are used to reconstruct paleoclimatic and paleoceanographic environments on a time scale of 0.1 to 0.5 m.y. for the past 20 Ma. These

Studies in Paleo-Oceanography

  • W. Hay
  • Geology, Environmental Science
  • 1974
This volume represents some of the papers presented at the SEPM Research Symposium GeologicHistory of the Oceans at the Annual Meeting, March 1971, in Houston, Texas. Knowledge of oceanic sediments