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Eurasian contribution to the last glacial dust cycle: how are loess sequences built?

Denis-Didier Rousseau; Anders Svensson; Matthias Bigler; Adriana Sima; Jorgen Peder Steffensen; Niklas Boers

Title:
Eurasian contribution to the last glacial dust cycle: how are loess sequences built?
Author(s):
Rousseau, Denis-Didier
Svensson, Anders
Bigler, Matthias
Sima, Adriana
Steffensen, Jorgen Peder
Boers, Niklas
Date:
Type:
Articles
Department(s):
Lamont-Doherty Earth Observatory
Volume:
13
Persistent URL:
Book/Journal Title:
Climate of the Past
Geographic Area:
Greenland
Northern Hemisphere
Abstract:
The last 130 000 years have been marked by pronounced millennial-scale climate variability, which strongly impacted the terrestrial environments of the Northern Hemisphere, especially at middle latitudes. Identifying the trigger of these variations, which are most likely associated with strong couplings between the ocean and the atmosphere, still remains a key question. Here, we show that the analysis of δ¹⁸O and dust in the Greenland ice cores, and a critical study of their source variations, reconciles these records with those observed on the Eurasian continent. We demonstrate the link between European and Chinese loess sequences, dust records in Greenland, and variations in the North Atlantic sea ice extent. The sources of the emitted and transported dust material are variable and relate to different environments corresponding to present desert areas, but also hidden regions related to lower sea level stands, dry rivers, or zones close to the frontal moraines of the main Northern Hemisphere ice sheets. We anticipate our study to be at the origin of more sophisticated and elaborated investigations of millennial and sub-millennial continental climate variability in the Northern Hemisphere.
Subject(s):
Climatic changes
Paleoclimatology
Dust
Loess--Environmental aspects
Publisher DOI:
https://doi.org/10.5194/cp-13-1181-2017
Item views
7
Metadata:
text | xml
Suggested Citation:
Denis-Didier Rousseau, Anders Svensson, Matthias Bigler, Adriana Sima, Jorgen Peder Steffensen, Niklas Boers, , Eurasian contribution to the last glacial dust cycle: how are loess sequences built?, Columbia University Academic Commons, .

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