Huguet, Carme et al. (2011): Coherent millennial-scale patterns in U (sub 37) (super k') and TEX (sub 86) (super H) temperature records during the penultimate interglacial-to-glacial cycle in the western Mediterranean
Leg/Site/Hole:
Related Expeditions:
ODP 161
Identifier:
ID:
2013-035830
Type:
georefid
ID:
10.1029/2010PA002048
Type:
doi
Creator:
Name:
Huguet, Carme
Affiliation:
Royal Netherlands Institute for Sea Research, Department of Marine Organic Biogeochemistry, Den Burg, Netherlands
Role:
author
Name:
Martrat, Belen
Affiliation:
Spanish Council for Scientific Research, Spain
Role:
author
Name:
Grimalt, Joan O.
Affiliation:
Role:
author
Name:
Sinninghe Damste, Jaap S.
Affiliation:
Role:
author
Name:
Schouten, Stefan
Affiliation:
Role:
author
Identification:
Title:
Coherent millennial-scale patterns in U (sub 37) (super k') and TEX (sub 86) (super H) temperature records during the penultimate interglacial-to-glacial cycle in the western Mediterranean
Year:
2011
Source:
Paleoceanography
Publisher:
American Geophysical Union, Washington, DC, United States
Volume:
26
Issue:
2
Pages:
Abstract:
The TEX (sub 86) (super H) temperature proxy is a relatively new proxy based on crenarchaeotal lipids and has rarely been applied together with other temperature proxies. In this study, we applied the TEX (sub 86) (super H) on a sediment core from the Alboran Sea (western Mediterranean, core ODP-977A) covering the penultimate climate cycle, that is, from 244 to 130 ka, and compared this with previously published sea surface temperatures derived from the U (sub 37) (super k') of alkenones of haptophyta and Mg/Ca records of planktonic foraminifera. The TEX (sub 86) (super H) temperature record shows remarkably similar stadial-interstadial patterns and abrupt temperature changes to those observed with the U (sub 37) (super k') palaeothermometer. Absolute TEX (sub 86) (super H) temperature estimates are generally higher than those of U (sub 37) (super k') , though this difference (<3 degrees C in 81% of the data points) is mainly within the temperature calibration error for both proxies, suggesting that crenarchaeota and haptophyta experienced similar temperature variations. During occasional events (<5% of the analyzed time span), however, the TEX (sub 86) (super H) exhibits considerably higher absolute temperature estimates than the U (sub 37) (super k') . Comparison with Mg/Ca records of planktonic foraminifera as well as other Mediterranean TEX (sub 86) and U (sub 37) (super k') records suggests that part of this divergence may be attributed to seasonal differences, that is, with TEX (sub 86) (super H) reflecting mainly the warm summer season while U (sub 37) (super k') would show annual mean. Biases in the global calibration of both proxies or specific biases in the Mediterranean are an alternative, though less likely, explanation. Despite differences between absolute TEX (sub 86) (super H) and U (sub 37) (super k') temperatures, the correlation between the two proxies (r (super 2) = 0.59, 95% significance) provides support for the occurrence of abrupt temperature variations in the western Mediterranean during the penultimate interglacial-to-glacial cycle.
Language:
English
Genre:
Serial
Rights:
URL:
Coverage: Geographic coordinates: North:36.0154 West:-1.5719 East:
-1.5719 South:36.0154
Keywords: Quaternary geology; Alboran Sea; alkaline earth metals; alkenones; calcium; Cenozoic; chemostratigraphy; cores; Foraminifera; Invertebrata; ketones; Leg 161; lipids; magnesium; marine sediments; Mediterranean Sea; metals; Mg/Ca; microfossils; Ocean Drilling Program; ODP Site 977; organic compounds; paleotemperature; Protista; Quaternary; reconstruction; sea-surface temperature; seasonal variations; sediments; TEX-86; tracers; upper Quaternary; West Mediterranean;
.