کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
7450321 | 1484048 | 2018 | 14 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Loess accumulation in the Tian Shan piedmont: Implications for palaeoenvironmental change in arid Central Asia
ترجمه فارسی عنوان
تجمع لوس در تیان شان: تداوم تغییرات محیط زیست در خشکی آسیای مرکزی
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کلمات کلیدی
لس آسیای مرکزی، تیان شان احمق، قزاقستان، بازسازی محیط زیست، تولدت مبارک
موضوعات مرتبط
مهندسی و علوم پایه
علوم زمین و سیارات
زمین شناسی
چکیده انگلیسی
The chronostratigraphic variability between our sites highlights a need to interrogate climate-driven models for loess formation in piedmont environments. We interpret our data in the context of regional palaeoenvironmental archives to indicate that loess accumulation increased coeval with MIS 3 glacial advance in the Tian Shan, which was facilitated by northward expansion of the Asian monsoon and associated increase in precipitation. We hypothesise that increased ice volume impeded teleconnections with the temperate zone westerlies to the north; these were compressed against the piedmont resulting in increased wind strength and facilitating increased loess flux. Peak loess accumulation during the gLGM occurred under colder, drier climatic conditions, with reduced but sustained glacial ice volume and persistent influence of the westerlies in the arid Central Asian piedmont loess belt. In the absence of more widespread, reliably dated palaeoenvironmental records from the region, our data become of critical importance for understanding past environmental conditions in Central Asia, relative to elsewhere in Eurasia and globally.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Quaternary International - Volume 469, Part A, 5 March 2018, Pages 30-43
Journal: Quaternary International - Volume 469, Part A, 5 March 2018, Pages 30-43
نویسندگان
Kathryn E. Fitzsimmons, Tobias Sprafke, Christoph Zielhofer, Christina Günter, Jean-Marc Deom, Renato Sala, Radu Iovita,