XRF, XRD, grainsize and total organic carbon in core Konar Sandal peat bog, SE Iran

Rapid North Atlantic cooling events during the last deglaciation caused atmospheric reorganizations on global and regional scales. Their impact on Asian climate has been investigated for monsoonal domains, but remains largely unknown in westerly wind-dominated semi-arid regions. Here we generate a d...

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Bibliographic Details
Main Authors: Safaierad, Reza, Mohtadi, Mahyar, Zolitschka, Bernd, Yokoyama, Yusuke, Vogt, Christoph, Schefuß, Enno
Format: Dataset
Language:English
Published: PANGAEA 2020
Subjects:
Atmospheric dust
North Atlantic cooling
Northern Hemisphere Westerlies
sea-ice
West Asia
North Atlantic
Sea ice
Online Access:https://doi.pangaea.de/10.1594/PANGAEA.918548
https://doi.org/10.1594/PANGAEA.918548
Description
Summary:Rapid North Atlantic cooling events during the last deglaciation caused atmospheric reorganizations on global and regional scales. Their impact on Asian climate has been investigated for monsoonal domains, but remains largely unknown in westerly wind-dominated semi-arid regions. Here we generate a dust record from southeastern Iran spanning the period 19-7 cal. ka BP. We find a direct link between frequent occurrences of dust plumes originating from the Arabian Peninsula and North Africa, and rapid southward shifts of the westerlies associated with changes of the winter stationary waves during Heinrich Stadial 1, the Younger Dryas, the Preboreal Oscillation and the 8.2 ka event. Dust input rises and falls abruptly at the transitions into and out of these cooling events, which we attribute to changes in the ocean circulation strength and modulated by the North Atlantic winter sea-ice cover. Our findings reveal that waxing and waning of North American ice sheets have a stronger influence than those of European ice sheets on the winter climate over West Asia.

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