The cause of the Late Cenozoic Northern Hemisphere glaciations: a climate change enigma
ABSTRACT The ultimate cause of the onset of glaciations remains elusive, but in the case of northem hemisphere glaciation it is probable that several factors acted in combination. General global cooling resulted from reduction of atmospheric C0 2 by weathering of silicate rocks exposed by erosion of...
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crwiley:10.1111/j.1365-3121.1992.tb00819.x 2024-06-02T08:05:44+00:00 The cause of the Late Cenozoic Northern Hemisphere glaciations: a climate change enigma Hay, William W. 1992 http://dx.doi.org/10.1111/j.1365-3121.1992.tb00819.x https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Fj.1365-3121.1992.tb00819.x https://onlinelibrary.wiley.com/doi/pdf/10.1111/j.1365-3121.1992.tb00819.x en eng Wiley http://onlinelibrary.wiley.com/termsAndConditions#vor Terra Nova volume 4, issue 3, page 305-311 ISSN 0954-4879 1365-3121 journal-article 1992 crwiley https://doi.org/10.1111/j.1365-3121.1992.tb00819.x 2024-05-03T11:22:25Z ABSTRACT The ultimate cause of the onset of glaciations remains elusive, but in the case of northem hemisphere glaciation it is probable that several factors acted in combination. General global cooling resulted from reduction of atmospheric C0 2 by weathering of silicate rocks exposed by erosion of late Cenozoic uplifts. Uplifts in south Asia, southwestern North America and Scandinavia occurred at distances appropriate for the generation of quasi‐permanent Rossby waves in the atmosphere. The resulting winds, given suitable moisture sources, were favourable for causing large‐scale precipitation at mid‐latitudes on the northern continents. Moisture sources were provided by the closure of the Central American isthmus. Gulf Stream flow increased, carrying warm subtropical waters to high latitudes. The Denmark Strait deepened permitting greater outflow of deep water from the Norwegian‐Greenland Sea. The relative importance of each of these factors should be investigated by additional atmospheric and ocean climate model sensitivity studies. Article in Journal/Newspaper Denmark Strait Greenland Greenland Sea Wiley Online Library Greenland Terra Nova 4 3 305 311 |
institution |
Open Polar |
collection |
Wiley Online Library |
op_collection_id |
crwiley |
language |
English |
description |
ABSTRACT The ultimate cause of the onset of glaciations remains elusive, but in the case of northem hemisphere glaciation it is probable that several factors acted in combination. General global cooling resulted from reduction of atmospheric C0 2 by weathering of silicate rocks exposed by erosion of late Cenozoic uplifts. Uplifts in south Asia, southwestern North America and Scandinavia occurred at distances appropriate for the generation of quasi‐permanent Rossby waves in the atmosphere. The resulting winds, given suitable moisture sources, were favourable for causing large‐scale precipitation at mid‐latitudes on the northern continents. Moisture sources were provided by the closure of the Central American isthmus. Gulf Stream flow increased, carrying warm subtropical waters to high latitudes. The Denmark Strait deepened permitting greater outflow of deep water from the Norwegian‐Greenland Sea. The relative importance of each of these factors should be investigated by additional atmospheric and ocean climate model sensitivity studies. |
format |
Article in Journal/Newspaper |
author |
Hay, William W. |
spellingShingle |
Hay, William W. The cause of the Late Cenozoic Northern Hemisphere glaciations: a climate change enigma |
author_facet |
Hay, William W. |
author_sort |
Hay, William W. |
title |
The cause of the Late Cenozoic Northern Hemisphere glaciations: a climate change enigma |
title_short |
The cause of the Late Cenozoic Northern Hemisphere glaciations: a climate change enigma |
title_full |
The cause of the Late Cenozoic Northern Hemisphere glaciations: a climate change enigma |
title_fullStr |
The cause of the Late Cenozoic Northern Hemisphere glaciations: a climate change enigma |
title_full_unstemmed |
The cause of the Late Cenozoic Northern Hemisphere glaciations: a climate change enigma |
title_sort |
cause of the late cenozoic northern hemisphere glaciations: a climate change enigma |
publisher |
Wiley |
publishDate |
1992 |
url |
http://dx.doi.org/10.1111/j.1365-3121.1992.tb00819.x https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Fj.1365-3121.1992.tb00819.x https://onlinelibrary.wiley.com/doi/pdf/10.1111/j.1365-3121.1992.tb00819.x |
geographic |
Greenland |
geographic_facet |
Greenland |
genre |
Denmark Strait Greenland Greenland Sea |
genre_facet |
Denmark Strait Greenland Greenland Sea |
op_source |
Terra Nova volume 4, issue 3, page 305-311 ISSN 0954-4879 1365-3121 |
op_rights |
http://onlinelibrary.wiley.com/termsAndConditions#vor |
op_doi |
https://doi.org/10.1111/j.1365-3121.1992.tb00819.x |
container_title |
Terra Nova |
container_volume |
4 |
container_issue |
3 |
container_start_page |
305 |
op_container_end_page |
311 |
_version_ |
1800750610971099136 |