Mid- to Late Pleistocene Ice Drift in the Western Arctic Ocean: Evidence for a Different Circulation in the Past
The provenance of ice-rafted debris (IRD) in four Arctic sediment cores implies that icebergs from the northwestern Laurentide ice sheets drifted across the western Arctic Ocean along the 180°–0° meridian toward Fram Strait during mid- to late Pleistocene deglaciations within the last 700,000 years....
Published in: | Science |
---|---|
Main Authors: | , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
American Association for the Advancement of Science (AAAS)
1997
|
Subjects: | |
Online Access: | http://dx.doi.org/10.1126/science.277.5322.74 https://www.science.org/doi/pdf/10.1126/science.277.5322.74 |
Summary: | The provenance of ice-rafted debris (IRD) in four Arctic sediment cores implies that icebergs from the northwestern Laurentide ice sheets drifted across the western Arctic Ocean along the 180°–0° meridian toward Fram Strait during mid- to late Pleistocene deglaciations within the last 700,000 years. This iceberg drift was different from the present-day Beaufort Gyre circulation and resembled a dislocated transpolar drift (TPD). Sea ice mainly followed the iceberg trajectories but also frequently drifted from the Russian shelves eastward into the Amerasian Basin. |
---|