Title Timing of glacier expansion during the last glacial in the inner Tien Shan, Kyrgyz Republic by OSL dating
Author Narama, C.; Kondo, R.; Tsukamoto, S.; Kajiura, T.; Duishonakunov, M.; Abdrakhmatov, K.
Author Affil Narama, C., Research Institute for Humanity and Nature, Kyoto, Japan. Other: Aberystwyth University, United Kingdom; University of Aarhus, Denmark; Korea Basic Science Institute, South Korea; Meiji University, Japan; Aberystwyth University, United Kingdom; Rissho University, Japan; Kyrgyz National University, Kyrgyzstan; National Academy of Sciences of Kyrgyz Republic, Institute of Seismology, Kyrgyzstan
Source Application of luminescence dating to Quaternary tectonic movements and environmental change, edited by S. Tsukamoto, G.A.T. Duller, A.S. Murray and J. Choi. Quaternary International, 199(1-2), p.147- 156, . Publisher: Elsevier, Oxford, United Kingdom. ISSN: 1040-6182
Publication Date Apr. 15, 2009
Notes In English. 41 refs. GeoRef Acc. No: 307817
Index Terms radioactive age determination; Alpine landscapes; climatic change; glaciation; glaciers; loess; paleoclimatology; Pleistocene; Quaternary deposits; sedimentation; sediments; Kyrgyzstan; Asia-- Tien Shan; absolute age; alpine environment; Asia; Cenozoic; chronology; clastic sediments; climate change; Commonwealth of Independent States; glacial sedimentation; MIS 2; moraines; optically stimulated luminescence; paleoenvironment; Quaternary; terrestrial environment; Teskey Ala-Too Range; Tien Shan; upper Pleistocene
Abstract Optically stimulated luminescence (OSL) dating was applied to glacial sediments and adjacent loess from moraines in the Teskey Ala-Too and At-Bashy Ranges in the inner Tien Shan, Kyrgyz Republic (Kyrgyzstan). Two large glacier expansions during the Last Glacial were observed in the two study areas; Teskey (=Terskey) Stages I and II moraines were dated to marine isotope stage (MIS) 4-early-MIS 3 and MIS 2, and At- Bashy Stage II in the At-Bashy Range dated to late-MIS 3-MIS 2. The timing of the two expansions during the Last Glacial coincided with global cold periods and with advances of the major Northern Hemisphere ice sheets. However, the fact that the greater expansion occurred in MIS 4-early-MIS 3 in the Teskey Ala-Too Range, suggests that climate during MIS 4-early-MIS 3 was more humid than during MIS 2. It is possible that the strengthened Siberian High during MIS 2 restricted the impact of the westerlies and this reduced precipitation in the study area.
URL http://hdl.handle.net/10.1016/j.quaint.2008.04.010
Publication Type journal article
Record ID 65004853