Timing of glacier expansion during the Last Glacial in the inner Tien Shan, Kyrgyz Republic by OSL dating

Autor:	R. Kondo, Chiyuki Narama, Sumiko Tsukamoto, K. Abdrakhmatov, Murataly Duishonakunov, T. Kajiura
Rok vydání:	2009
Předmět:	Marine isotope stage geography geography.geographical_feature_category Westerlies Glacier Siberian High Moraine Loess Physical geography Glacial period Ice sheet Geomorphology Geology Earth-Surface Processes
Zdroj:	Quaternary International. 199:147-156
ISSN:	1040-6182
Popis:	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.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::a45496344dac0756509c6ed65e4aaa9c https://doi.org/10.1016/j.quaint.2008.04.010 Zobrazit plný text záznamu Full Text from ScienceDirect