Increase in Dust Concentration in the Dasuopu Ice Core from the Middle Himalayas and Drying Trend in South and West Asia and North Africa over the Last 500 Years
详细信息
- 责任者：Wang Ninglian (State Key Laboratory of Cryospheric Sciences ; Cold and Arid Regions Environmental and Engineering Research Institute ; Chinese Academy of Sciences ; Lanzhou 730000 ; China) ; Yao Tandong
- 刊名：Quaternary Sciences
- 出版年：2012
- 卷期：32(1)
- 关键词：冰心 ; ice core ; 古气候 ; paleoclimate ; 喜马拉雅山 ; Himalayas
- 页码：p.53-58
- 图表：7 illus., 27 refs.
- 分类号：1400
- issnNo：ISSN1001-7410
- isbnNo：CN11-2708/P
摘要
In 1997, two ice cores, 149.2 m and 167.7 m long, respectively, were drilled from the Dasuopu glacier ( 28°23′N, 85°43’E) to bedrock on the col at 7 200 m a.s.l. where the average annual net balance is about 1 000 mm water equivalent. Based on the backward trajectories of air parcels, and along with the study on aerosols in the area near the drilling site by other investigators, it was considered that the long-range transport of dust to the drilling site in the middle Himalayas from arid regions ranging from the South and West Asia to perhaps as far as the Sahara. The increase in dust concentration and dust flux in the Dasuopu ice core over the last 500 years might reflect the drying trend in dust source regions, especially in the last two centuries.
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