کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
5755688 1622119 2017 15 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Monsoonal climate evolution in southern China since 1.2 Ma: New constraints from Fe-oxide records in red earth sediments from the Shengli section, Chengdu Basin
موضوعات مرتبط
مهندسی و علوم پایه علوم زمین و سیارات فرآیندهای سطح زمین
پیش نمایش صفحه اول مقاله
Monsoonal climate evolution in southern China since 1.2 Ma: New constraints from Fe-oxide records in red earth sediments from the Shengli section, Chengdu Basin
چکیده انگلیسی
Large fluctuations in major-element oxide concentrations and clay-mineral assemblages in the lower part of the section indicate climatic fluctuations between perennially humid and seasonally humid conditions in the mid-Pleistocene. Monsoonal climate evolution, as proxied by the hematite/(hematite + goethite) [Hm/(Hm + Gt)] ratio, shows a long-term but stepwise cooling and drying pattern in the Chengdu Basin with major transitions at ~ 1.0, 0.45, and 0.1 Ma. These transitions were probably triggered by episodes of tectonic uplift of the Tibetan Plateau and global climate change, with consequent effects on the Asian monsoons. The transitions in our paleoclimate proxy records for southern China match well with shifts in the marine oxygen and carbon isotope records since the mid-Quaternary, providing evidence of strong teleconnections between global and regional climates, terrestrial weathering, and the global carbon cycle.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Palaeogeography, Palaeoclimatology, Palaeoecology - Volume 473, 1 May 2017, Pages 1-15
نویسندگان
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