Modeling Dust Emission Response to North Atlantic Millennial-Scale Climate Variations from the Perspective of East European MIS 3 Loess Deposits ...

• Main Authors: Sima, A., Kageyama, M., Rousseau, Denis-Didier, Ramstein, G., Balkanski, Y., Antoine, Pierre, Hatté, Christine
• Format: Article in Journal/Newspaper
• Language: unknown
• Published: Columbia University 2013
• Subjects: Submarine geology; Climatic changes; Greenland; North Atlantic
• Online Access: https://dx.doi.org/10.7916/d8qz2n0t; https://academiccommons.columbia.edu/doi/10.7916/D8QZ2N0T

European loess sequences of the Marine Isotope Stage 3 (~60–25 kyr BP) show periods of strong dust accumulation alternating with episodes of reduced sedimentation, favoring soil development. In the western part of the loess belt centered around 50° N, these variations appear to have been related to the North Atlantic rapid climate changes: the Dansgaard–Oeschger (DO) and Heinrich (H) events. It has been recently suggested that the North Atlantic climate signal can be detected further east, in loess deposits from Stayky (50°05.65' N, 30°53.92' E), Ukraine. Here we use climate and dust emission modeling to investigate this data interpretation. We focus on the areas north and northeast of the Carpathians, where loess deposits can be found, and the corresponding main dust sources must have been located as well. The simulations were performed with the LMDZ atmospheric general circulation model and the ORCHIDEE land surface model. They represent a reference "Greenland stadial" state and two perturbations, seen as ...