FN Archimer Export Format
PT J
TI Exceptional Agulhas leakage prolonged interglacial warmth during MIS 11c in Europe
BT 
AF KOUTSODENDRIS, Andreas
   PROSS, Joerg
   ZAHN, Rainer
AS 1:1;2:1;3:2;
FF 1:;2:;3:;
C1 Heidelberg Univ, Inst Earth Sci, Paleoenvironm Dynam Grp, Heidelberg, Germany.
   Univ Autonoma Barcelona, Dept Fis, ICREA, ICTA, E-08193 Barcelona, Spain.
C2 UNIV HEIDELBERG, GERMANY
   UNIV AUTONOMA BARCELONA, SPAIN
IF 3.738
TC 13
UR https://archimer.ifremer.fr/doc/00289/40056/39273.pdf
   https://archimer.ifremer.fr/doc/00289/40056/39274.docx
LA English
DT Article
CR MD 123 / GEOSCIENCES 1
   NAUSICAA-IMAGES 2-MD105
BO Marion Dufresne
DE ;Agulhas leakage;interhemispheric teleconnection;MIS 11c;Iberian margin;Central European climate
AB The transport of warm and saline surface water from the Indo-Pacific Ocean into the South Atlantic (Agulhas leakage) influences the Atlantic Meridional Overturning Circulation (AMOC), which in turn exerts control on European climate. Paleoceanographic data document a remarkably strong Agulhas leakage at the end of marine isotope stage (MIS) 11c interglacial (similar to 400ka B.P.), which is one of the best orbital analogues for the Holocene. Here we assess the potential influence of this exceptional Agulhas leakage on North Atlantic climate based on a compilation of marine and terrestrial proxy records from the Iberian margin and continental Europe. We show that a similar to 5ka long warm period persisted across Europe beyond the MIS 11c climatic optimum. This warm period is testified by increases in foraminifer-derived sea surface temperatures on the Iberian margin, a spread of temperate trees on Iberia, and the expansion both of evergreen trees and thermophilous diatom taxa in Central European lowlands. Paradoxically, this warming coincides with an insolation minimum, implying that orbital forcing can be excluded as the underlying cause. We conclude that persistent warmth during weak insolation at the end of MIS 11c in Europe may have been triggered by strengthened Agulhas leakage, which stimulated a vigorous AMOC and increased the northward transport of warm surface waters to higher latitudes via the North Atlantic Current. The close analogy of the present and MIS 11c orbital forcing underlines the possibility that the present-day increase of the Agulhas leakage, although driven by different forcing than MIS 11c, may considerably affect future climates across Europe.
PY 2014
PD NOV
SO Paleoceanography
SN 0883-8305
PU Amer Geophysical Union
VL 29
IS 11
UT 000346489000005
BP 1062
EP 1071
DI 10.1002/2014PA002665
ID 40056
ER

EF