Deep Pleistocene iceberg plowmarks on the Yermak plateau: sidescan and 3.5 kHz evidence for thick calving ice fronts and a possible marine ice sheet in the Arctic Ocean
Article Abstract:
A recent study concludes that iceberg plowmarks at depths of 450-850 meters on the Yermak Plateau, north of Svalbard, indicates iceberg keels of 300-700 meters in depth during the glacial age, when sea level was 100-150 meters shallower than present sea level. The study cites the significantly shallower keel depths of icebergs from modern glaciers as evidence that iceberg keels were deeper during the glacial period. However, tabular icebergs with keels comparable to the Yermak icebergs are calved from Greenland outlet glaciers until today.
Publication Name: Geology
Subject: Earth sciences
ISSN: 0091-7613
Year: 1995
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Response of the high-latitude Northern Hemisphere to orbital climate forcing: evidence from the Nordic Seas: comment and reply
Article Abstract:
A recent study contends that meltwater input in the Nordic seas causes the 13-15 ka low oxygen isotope event. However, the study's conclusion fails to explain why the signal is more predominant than the 12 ka meltwater event in the Nordic seas and the Labrador Sea. In addition, other studies do not support the suggestion that marine-based ice sheets in the region in the initial deglaciation are affected by contemporaneous calving.
Publication Name: Geology
Subject: Earth sciences
ISSN: 0091-7613
Year: 1995
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Reply
Article Abstract:
Scientists have pointed out the unusual non-occurrence of deglacial meltwater spikes in deep-sea cores of the North Atlantic-Nordic seas at 12-13 ka. Theories as to why this phenomena does not occur at low currents have also been advanced by scientists. The theories point out alleged misconceptions in a study of the low oxygen isotope event. However, closer examination reveals that the study adequately explains the event.
Publication Name: Geology
Subject: Earth sciences
ISSN: 0091-7613
Year: 1995
User Contributions:
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