L. D. Bashirovaa, b, E. S. Kandianoc, V. V. Sivkova, b, and H. A. Bauchd
a P.P. Shirshov Institute of Oceanology, Atlantic Branch, Russian Academy of Sciences, Kaliningrad, Russia
e-mail: bas_leila@mail.ru
b Immanuel Kant Baltic Federal University, Kaliningrad, Russia
c Research Center for Marine Geosciences, GEOMAR-University of Kiel, Kiel, Germany
e-mail: ekandiano@geomar.de
d Mainz Academy of Sciences, Humanities, and Literature, Mainz, Germany
Received November 5, 2013; in final form, March 31, 2014
Abstract—The main migrations of the Polar front (PF) during the last 300 ka were identified using planktic
foraminiferal census data and derived from them sea surface paleotemperature (SST) estimates in two synchro-
nized AMK-4438 and M23414 cores recovered directly beneath the main stream of the North Atlantic Current
(NAC) south of Iceland. During the summer seasons, the cold waters adjacent to the PF did not reach the studied
sites. These waters occurred here only during the winter seasons of MIS 2, 6, and 8. The northern part of the
study area was influenced by the arctic waters more often than its southern part. During MIS 8 and 6 isotherms
in the North Atlantic had mainly the subzonal orientation, while during MIS 2–4 they had the submeridional
orientation. During the interglacials, the PF was located northward and westward from the study area. During
MIS 7, the front was presumably situated closer to the study area in comparison with its modern position, and
the isotherms were oriented mainly subzonal. For the MIS 5e period, we observed the most distant retreat of
PF from the investigated area in the western and northwestern direction in relation to the anomalous deflection
of the NAC to the north-west (intensification of the Irminger current) and the predominance of the submeridi-
onal orientation of the isotherms in the study area. During MIS 1, as well as MIS 7, the isotherms in the study
area had mainly the subzonal orientation.
DOI: 10.1134/S0001437014060010
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