Sediment-color record from the Northeast Atlantic reveals patterns of millennial-scale climate variability during the past 500,000 years

Helmke, Jan, Schulz, M. and Bauch, Henning (2002) Sediment-color record from the Northeast Atlantic reveals patterns of millennial-scale climate variability during the past 500,000 years Quaternary Research, 57 . pp. 49-57. DOI 10.1006/qres.2001.2289.

[img] Text
Müller-Lupp.pdf - Reprinted Version
Restricted to Registered users only

Download (1251Kb) | Contact

Supplementary data:

Abstract

A 500,000-yr-long deep-sea sediment-color record from the Northeast Atlantic was investigated to reconstruct the evolution of late Pleistocene climate variability on millennial time scales. Variations of the red–green color intensity are probably caused by climatically induced changes in the ice-rafted input of red-colored iron-bearing terrigenous material to the core site. The resolution of the age model impedes the detection of distinct spectral features at sub-Milankovitch periodicities. Hence, millennial-scale climate variability is quantified as time-dependent variance of the high-pass filtered color time series. The course of the estimated variance shows distinct patterns, which can be linked to continental ice mass. During the past 500,000 yr, large-amplitude millennial-scale climate variability occurs only if continental ice mass exceeds a threshold level, equivalent to sea level at approximately 40% of the lowering during the last glacial maximum.

Document Type: Article
Keywords: deep-sea sediment-color, Northeast Atlantic
Research affiliation: OceanRep > GEOMAR > FB1 Ocean Circulation and Climate Dynamics > FB1-P-OZ Paleo-Oceanography
Refereed: Yes
DOI etc.: 10.1006/qres.2001.2289
ISSN: 0033-5894
Date Deposited: 18 Feb 2008 17:25
Last Modified: 19 Sep 2016 11:58
URI: http://eprints.uni-kiel.de/id/eprint/1002

Actions (login required)

View Item View Item

Document Downloads

More statistics for this item...