TY  - JOUR
A1  - Deplazes, Gaudenz
A1  - Lückge, Andreas
A1  - Stuut, Jan-Berend W.
A1  - Paetzold, Jürgen
A1  - Kuhlmann, Holger
A1  - Husson, Dorothee
A1  - Fant, Mara
A1  - Haug, Gerald H.
T1  - Weakening and strengthening of the Indian monsoon during Heinrich events and Dansgaard- Oeschger oscillations
JF  - Paleoceanography
N2  - The Dansgaard-Oeschger oscillations and Heinrich events described in North Atlantic sediments and Greenland ice are expressed in the climate of the tropics, for example, as documented in Arabian Sea sediments. Given the strength of this teleconnection, we seek to reconstruct its range of environmental impacts. We present geochemical and sedimentological data from core SO130-289KL from the Indus submarine slope spanning the last similar to 80 kyr. Elemental and grain size analyses consistently indicate that interstadials are characterized by an increased contribution of fluvial suspension from the Indus River. In contrast, stadials are characterized by an increased contribution of aeolian dust from the Arabian Peninsula. Decadal-scale shifts at climate transitions, such as onsets of interstadials, were coeval with changes in productivity-related proxies. Heinrich events stand out as especially dry and dusty events, indicating a dramatically weakened Indian summer monsoon, potentially increased winter monsoon circulation, and increased aridity on the Arabian Peninsula. This finding is consistent with other paleoclimate evidence for continental aridity in the northern tropics during these events. Our results strengthen the evidence that circum-North Atlantic temperature variations translate to hydrological shifts in the tropics, with major impacts on regional environmental conditions such as rainfall, river discharge, aeolian dust transport, and ocean margin anoxia.
KW  - Indian Monsoon
KW  - Arabian Sea
KW  - XRF
KW  - Dansgaard-Oeschger oscillations
KW  - Heinrich events
KW  - Sediment Transport
Y1  - 2014
U6  - https://doi.org/10.1002/2013PA002509
SN  - 0883-8305
SN  - 1944-9186
VL  - 29
IS  - 2
SP  - 99
EP  - 114
PB  - American Geophysical Union
CY  - Washington
ER  -