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Ground-Air Interface: The Loess Sequences, Markers of Atmospheric Circulation

Rousseau, Denis-Didier; Hatté, Christine

Atmospheric circulation is responsible for the rapid distribution of heat and moisture across the Earth and hence determines our weather and regional climate, today and in the past. During past climate cycles, the atmosphere has been much more dustier, except during the interglacials, inducing uncertainties about the impact of mineral aerosols on the past climate dynamics. There are abundant traces of the combination of past atmospheric dynamics and paleodust cycle such as eolian mineral material transported and deposited in terrestrial archives as loess. Records from loess deposits consistently suggest that atmospheric dynamics was highly variable, during the past climate cycles, much more than presently where the only sources of dust are the major deserts. In this chapter we explained the four main categories of parameters allowing to identify loess deposits as reliable markers for past air circulation.

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Also Published In

Title
Paleoclimatology
Publisher
Springer, Cham
DOI
https://doi.org/10.1007/978-3-030-24982-3_13

More About This Work

Academic Units
Lamont-Doherty Earth Observatory
Biology and Paleo Environment
Published Here
December 2, 2020

Notes

Rousseau DD., Hatté C. (2021) Ground-Air Interface: The Loess Sequences, Markers of Atmospheric Circulation. In: Ramstein G., Landais A., Bouttes N., Sepulchre P., Govin A. (eds) Paleoclimatology. Frontiers in Earth Sciences. Springer, Cham. https://doi.org/10.1007/978-3-030-24982-3_13
First Online 08 November 2020