XRF, XRD, grainsize and total organic carbon in core Konar Sandal peat bog, SE Iran
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| Format: | Dataset Open Access |
| Sprache: | en |
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PANGAEA
2020
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| author | Safaierad, Reza Mohtadi, Mahyar Zolitschka, Bernd Yokoyama, Yusuke Vogt, Christoph Schefuß, Enno |
| author_facet | Safaierad, Reza Mohtadi, Mahyar Zolitschka, Bernd Yokoyama, Yusuke Vogt, Christoph Schefuß, Enno |
| collection | Datos científicos de ciencias marinas y ambientales |
| contents | 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. |
| format | Dataset Open Access |
| id | pangaea_https___doi_org_10_1594_PANGAEA_918548 |
| institution | PANGAEA |
| language | en |
| publishDate | 2020 |
| publisher | PANGAEA |
| record_format | pangaea |
| spellingShingle | XRF, XRD, grainsize and total organic carbon in core Konar Sandal peat bog, SE Iran Safaierad, Reza Mohtadi, Mahyar Zolitschka, Bernd Yokoyama, Yusuke Vogt, Christoph Schefuß, Enno Atmospheric dust; North Atlantic cooling; Northern Hemisphere Westerlies; sea-ice; West Asia 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. |
| title | XRF, XRD, grainsize and total organic carbon in core Konar Sandal peat bog, SE Iran |
| topic | Atmospheric dust; North Atlantic cooling; Northern Hemisphere Westerlies; sea-ice; West Asia |
| url | https://doi.org/10.1594/PANGAEA.918548 |