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Holocene forcing of aeolian dust activity over the Tibetan Plateau and its surroundings

Yang, Junhuai (author)
Wang, Haoyu (author)
Gao, Fuyuan (author)
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Wang, Zhenqian, 1989- (author)
Stockholms universitet,Institutionen för naturgeografi,Bolincentret för klimatforskning (tills m KTH & SMHI)
Wang, Shuyuan (author)
Fan, Yijiao (author)
Li, Tuoyu (author)
Liu, Xin (author)
Qu, Wenxi (author)
Li, Jianye (author)
Zhang, Yixiao (author)
Chen, Zixuan (author)
Liu, Li (author)
Ayyamperumal, Ramamoorthy (author)
Yang, Shengli (author)
Xia, Dunsheng (author)
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 (creator_code:org_t)
2024
2024
English.
In: Global and Planetary Change. - 0921-8181 .- 1872-6364. ; 235
  • Journal article (peer-reviewed)
Abstract Subject headings
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  • 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.

Subject headings

NATURVETENSKAP  -- Geovetenskap och miljövetenskap -- Naturgeografi (hsv//swe)
NATURAL SCIENCES  -- Earth and Related Environmental Sciences -- Physical Geography (hsv//eng)

Keyword

Aeolian deposits
Climate change
Grain size
Dust accumulation rate
Yarlung Zangbo River
Arid Central Asia

Publication and Content Type

ref (subject category)
art (subject category)

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