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Holocene forcing of aeolian dust activity over the Tibetan Plateau and its surroundings
Stockholm University, Faculty of Science, Department of Physical Geography. Stockholm University, Faculty of Science, The Bolin Centre for Climate Research (together with KTH & SMHI).
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Number of Authors: 162024 (English)In: Global and Planetary Change, ISSN 0921-8181, E-ISSN 1872-6364, Vol. 235, article id 104400Article in journal (Refereed) Published
Abstract [en]

Aeolian deposits on the Tibetan Plateau (TP) and its surroundings provide crucial source materials for the Asian dust cycle, which significantly affects Asian and global ecosystems and climate. However, it is unclear how the dust dynamics of the TP and its surroundings are linked to Earth's climate system. To address this issue, we examined the grain size and accumulation rate of six Holocene aeolian sections on the southern TP (a new, well-dated high-resolution section, two relatively low-resolution sections, and three published sections) and combined them with equivalent aeolian sedimentary records from eastern arid central Asia. The results suggest that dust activity in both regions decreased during the early to middle Holocene and then increased in the late Holocene. We hypothesize that the primary drivers of Holocene dust activity in both regions are similar. Cold-season insolation, as the primary driving factor, combined with ice volume and atmospheric CO2 concentration, collectively controlled the regional temperature, which determined the near-surface wind intensity via its influence on the TP High and Siberian High, respectively, thus ultimately controlling the regional dust activity. In this context, we project that dust activity on the TP and its neighboring areas will decrease under warm scenarios in the 21st century. Overall, our findings provide an extensive overview of the past, present, and future scenarios of Asian dust activity, especially of the TP dust.

Place, publisher, year, edition, pages
2024. Vol. 235, article id 104400
Keywords [en]
Aeolian deposits, Climate change, Grain size, Dust accumulation rate, Yarlung Zangbo River, Arid Central Asia
National Category
Physical Geography
Identifiers
URN: urn:nbn:se:su:diva-229289DOI: 10.1016/j.gloplacha.2024.104400ISI: 001218900700001Scopus ID: 2-s2.0-85187209671OAI: oai:DiVA.org:su-229289DiVA, id: diva2:1859733
Available from: 2024-05-22 Created: 2024-05-22 Last updated: 2024-05-22Bibliographically approved

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Wang, Zhenqian

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CiteExportLink to record
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  • apa
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