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Interhemispheric synchroneity of Marine Oxygen Isotope Stage 2 glacier fluctuations along the American cordilleras transect
Author(s) -
Clapperton Chalmers
Publication year - 2000
Publication title -
journal of quaternary science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.142
H-Index - 94
eISSN - 1099-1417
pISSN - 0267-8179
DOI - 10.1002/1099-1417(200005)15:4<435::aid-jqs552>3.0.co;2-r
Subject(s) - geology , isotopes of oxygen , transect , glacial period , glacier , stage (stratigraphy) , precipitation , volcano , oceanography , period (music) , quaternary , paleontology , climatology , physical geography , meteorology , geography , geochemistry , physics , acoustics
This paper reviews the evidence for glacier advances in 11 different regions in the American cordilleras during the interval 40–10 kyr BP. The dating control is still too poor to provide firm constraints, but patterns are beginning to emerge. With the apparent exception of some Mexican volcanoes and the Colombian Andes, there was a period of reduced glaciation at 40–28 kyr BP, followed by an interval of ca. 15 kyr during which three to four glacier advances occurred in most regions. It appears that the main advances are synchronous in parts of both the Southern and Northern Hemispheres, although regional differences occur, probably in response to changes in precipitation and storm tracks. The tightest chronologies reveal an apparent millennial‐scale signal throughout the interval spanned by Marine Oxygen Isotope Stage 2. Copyright © 2000 John Wiley & Sons, Ltd.