A Short Circuit in Thermohaline Circulation: A Cause for Northern Hemisphere Glaciation?-Reference-Cited by-同舟云学术

A Short Circuit in Thermohaline Circulation: A Cause for Northern Hemisphere Glaciation?

Published:1998-10-16 Issue:5388 Volume:282 Page:436-438
ISSN:0036-8075
Container-title:Science
language:en
Short-container-title:Science

Author:

Driscoll N. W.¹,Haug G. H.¹

Affiliation:

1. N. W. Driscoll, Woods Hole Oceanographic Institution, Woods Hole, MA 02543, USA. G. H. Haug, GEOMAR, Forschungszentrum für Marine Geowissenschaften, Universität Kiel, Wischhofstrasse 1–3, D–24148 Kiel, Germany.

Abstract

The cause of Northern Hemisphere glaciation about 3 million years ago remains uncertain. Closing the Panamanian Isthmus increased thermohaline circulation and enhanced moisture supply to high latitudes, but the accompanying heat would have inhibited ice growth. One possible solution is that enhanced moisture transported to Eurasia also enhanced freshwater delivery to the Arctic via Siberian rivers. Freshwater input to the Arctic would facilitate sea ice formation, increase the albedo, and isolate the high heat capacity of the ocean from the atmosphere. It would also act as a negative feedback on the efficiency of the “conveyor belt” heat pump.

Publisher

American Association for the Advancement of Science (AAAS)

Subject

Multidisciplinary

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