uu.seUppsala University Publications
Change search
ReferencesLink to record
Permanent link

Direct link
The late Pleistocene glaciation in the Bogchigir Valleys (Pamir, Tajikistan) based on 10Be surface exposure dating
Show others and affiliations
2012 (English)In: Quaternary Research, ISSN 0033-5894, E-ISSN 1096-0287, Vol. 78, no 3, 590-597 p.Article in journal (Refereed) Published
Abstract [en]

Glacial chronologies from the Pamir may not only provide insights into past changes in temperature, but also into past changes in precipitation related to the northern-hemispheric westerlies and the monsoonal circulation. We present 18 new exposure ages from the Bogchigir Valleys that complement and refine our previous studies in these valleys. The most extensive dated glaciation in the area occurred ~. 100. ka, during Marine Oxygen Isotope Stage (MIS) 5, and indicates increased precipitation likely from both the westerlies and the monsoonal circulation. A subsequent glacier advance, which deposited characteristic 'chukur' moraine lobes, occurred at ~. 80-75. ka. Circumstantial evidence points to glacial advances at ~. 65 and 40. ka, the latter likely also documenting increased monsoonal moisture supply during MIS 3. Less extensive glacial advances occurred during MIS 2 at ~. 28 and 24. ka and reflect the aridization trend during the course of the last glacial cycle. Deglaciation started ~. 21. ka, interrupted by minor stillstands or readvances at ~. 16 and 12. ka. Local calibration sites and glacier-climate modeling would be very helpful to reduce the systematic methodological uncertainties (still at least 10%) and to draw more detailed paleoclimatic conclusions.

Place, publisher, year, edition, pages
2012. Vol. 78, no 3, 590-597 p.
Keyword [en]
Cosmogenic nuclides, Monsoon, Paleoclimate, Quaternary, Westerlies
National Category
Natural Sciences
URN: urn:nbn:se:uu:diva-186021DOI: 10.1016/j.yqres.2012.09.002ISI: 000310822100018OAI: oai:DiVA.org:uu-186021DiVA: diva2:572590
Available from: 2012-11-28 Created: 2012-11-27 Last updated: 2012-12-10Bibliographically approved

Open Access in DiVA

No full text

Other links

Publisher's full text

Search in DiVA

By author/editor
Aldahan, Ala
By organisation
In the same journal
Quaternary Research
Natural Sciences

Search outside of DiVA

GoogleGoogle Scholar
The number of downloads is the sum of all downloads of full texts. It may include eg previous versions that are now no longer available

Altmetric score

Total: 296 hits
ReferencesLink to record
Permanent link

Direct link