Origin and Consequences of Cyclic Ice Rafting in the Northeast Atlantic Ocean During the Past 130,000 Years

  title={Origin and Consequences of Cyclic Ice Rafting in the Northeast Atlantic Ocean During the Past 130,000 Years},
  author={Hartmut Heinrich},
  journal={Quaternary Research},
  pages={142 - 152}
  • H. Heinrich
  • Published 1 March 1988
  • Environmental Science, Geography
  • Quaternary Research

Wave inhibition by sea ice enables trans-Atlantic ice rafting of debris during Heinrich events

Iceberg discharges of the last glacial period driven by oceanic circulation changes

Results of the simulations of the Laurentide Ice Sheet forced by oceanic circulation changes support the hypothesis that these ice discharges were induced by the collapse of a buttressing ice shelf and the subsequent acceleration of inland ice streams, providing a new basis for understanding the dynamics of the coupled cryosphere–climate system of glacial cycles.

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

Instabilities in ice-stream flow within the North American Laurentide Ice Sheet, leading to the periodic release of armadas of icebergs into the North Atlantic Ocean over the past 60,000 years, have

Ice Sheet Action Versus Reaction: Distinguishing between Heinrich Events and Dansgaard‐Oeschger Cycles in the North Atlantic

[1] Glaciers and ice sheets play an active role in the climate system and the global hydrological cycle. The stability of continental ice sheets must be better understood for assessments of future

Subsurface ocean warming preceded Heinrich Events

Although the global environmental impact of Laurentide Ice-Sheet destabilizations on glacial climate during Heinrich Events is well-documented, the mechanism driving these ice-sheet instabilities

Correlation of Ice-Rafted Detritus in South Atlantic Sediments with Climate Proxies in Polar Ice over the Last Glacial Period

Previous study identified 6–7 millennial-scale episodes of South Atlantic ice-rafted sediment deposition (SA events) during the glaciation. Questions remain, however, regarding their origin,

Role of the thermohaline circulation in the abrupt warming after Heinrich events

EVIDENCE of rapid climate oscillations during the last glacial period has been identified in climate records from Greenland ice cores1,2 and ocean sediments in the North Atlantic3,4. These records

Terrestrial evidence for ocean forcing of Heinrich events and subglacial hydrologic connectivity of the Laurentide Ice Sheet

During the last glacial period, the Laurentide Ice Sheet (LIS) underwent episodes of rapid iceberg discharge, recorded in ocean sediments as “Heinrich events” (HEs). Two competing models attempt to



Oceanic mechanisms for amplification of the 23,000-year ice-volume cycle.

Spectral data indicate that the oceanic moisture and sea-level feedbacks, in part controlled by glacial melt products, amplify Milankovitch (insolation) forcing of the volumetrically dominant mid-latitude ice sheets at the 23,000-year precessional cycle.

Oceanic Evidence for the Mechanism of Rapid Northern Hemisphere Glaciation

Vertical Mixing of Ice-Rafted Volcanic Ash in North Atlantic Sediments

Three times in the last 620,000 yrs, highly silicic ash ejected from Icelandic or Jan Mayer volcanoes has been deposited in sediments over an area of several million square kilometers in the North

Late Quaternary deposition of ice-rafted sand in the subpolar North Atlantic (lat 40° to 65°N)

A major change in the North Atlantic pattern of ice-rafting deposition, during the last interglacial-glacial cycle, occurred approximately 75,000 B.P. Prior to this time, deposition for a period of

Was the Greenland ice sheet thinner in the late Wisconsinan than now?

  • N. Reeh
  • Environmental Science
  • 1985
Ice of Wisconsinan origin which constitutes the basal layers of the ice caps in arctic Canada and Greenland flows three to four times more readily than the Holocene ice above. A model based on simple

The Late Quaternary Glaciations as the Response of a Three-Component Feedback System to Earth-Orbital Forcing.

Abstract A climatic feedback system previously described, consisting of three prognostic nonlinear equations governing the mass of ice sheets ζ, the mass of marine and continental marginal ice χ, and

Milankovitch Hypothesis Supported by Precise Dating of Coral Reefs and Deep-Sea Sediments

Data show a parallelism over the last 150,000 years between changes in Earth's climate and changes in the summer insolation predicted from cycles in the tilt and precession of Earth's axis.

Subpolar North Atlantic Circulation at 9300 yr BP: Faunal Evidence

Evidence for two intervals of enhanced 10Be deposition in Antarctic ice during the last glacial period

We have previously reported concentration profiles of cosmic ray produced (cosmogenic) 10Be in deep ice cores from Dome C and Vostok, Antarctica1,2. In both these cores we found a concentration of

Sensitivity Experiments with a Model of the Ice Age Cycle: The Response to Milankovitch Forcing

Abstract We address the question of the extent to which a simple one-dimensional time-dependent climate model is able to explain the fluctuations of continental ice volume which have occurred during