Early Pleistocene (Olduvai Subchron) vegetation and climate change based on palynological records from the Yinchuan Basin of northwestern China
Early Pleistocene (Olduvai Subchron) vegetation and climate change based on palynological records from the Yinchuan Basin of northwestern China
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基于中国银川盆地孢粉学记录的早更新世植被与气候变化
DOI：
10.1016/j.palaeo.2020.109893
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发表时间：
2020-10
期刊：
影响因子：
--
通讯作者：
Chi Changting
中科院分区：
文献类型：
--
作者：
Tian Yanyan;Andreev Andrei A.;Zhou Zhu;Wei Mingjian;Wang Junping;Lu Lu;Chi Changting
近年来的研究主要集中在早更新世奥杜威亚时（1.95-1.77 Ma）相对寒冷和潮湿的时间段，但这一时间段的详细环境记录仍然很少。本文利用银川盆地PL 02钻孔（38°55′26.62″N，106°36′3.82″E）的高分辨率花粉记录，重建植被，推断气候变化。1.95 ~ 1.89 Ma，植被以荒漠草原为主，气候寒冷干燥。云杉属和冷杉属花粉的高比例表明1.89 ~ 1.87 Ma的气候条件寒冷潮湿，而阔叶植物花粉的比例在1.87 ~ 1.84 Ma的气候条件相对温暖潮湿，花粉比例迅速增加。从1.84至1.82 Ma的孢粉组合反映了一个寒冷和干燥的气候与旱生植物类群的增加和减少针叶树。进一步增加的旱生植物类群表明，相对寒冷和干燥的气候占主导地位后，1.80 Ma。新的高分辨率孢粉记录表明，银川盆地的环境变化与全球波动是同步的。推断的气候波动显示20 kyr周期在奥杜威亚时，支持的观点，研究区域的气候变化主要是由轨道因素控制。
Many recent studies focus on the relatively cold and humid interval during the Early Pleistocene Olduvai Subchron (1.95–1.77 Ma), but detailed environmental records for this interval are still rare. Here we present a high-resolution pollen record from the PL02 core (38°55′26.62″N, 106°36′3.82″E) from the Yinchuan Basin of northwestern China to reconstruct vegetation and infer climatic changes. Vegetation was dominated by desert steppe from 1.95 to 1.89 Ma suggesting a cold and dry climate. High percentages ofPiceaandAbiespollen indicate cold and humid conditions between 1.89 and 1.87 Ma while pollen percentages of broadleaved taxa increased rapidly between 1.87 and 1.84 Ma reflecting relatively warm and humid conditions. Palynological assemblages from 1.84 to 1.82 Ma reflect a colder and drier climate with an increase in xerophytic taxa and a decrease in conifers. Further increases of xerophytic taxa suggest a relatively cold and dry climate prevailed after 1.80 Ma. The new high-resolution palynological record suggests that environmental changes in the Yinchuan Basin are synchronous with global fluctuations. The inferred climate fluctuations show 20-kyr cycles during the Olduvai Subchron, supporting the view that climate changes in the study region were mainly controlled by orbital factors.
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影响因子：
2.2
作者：
Fuli Wu;X. Fang;Congrong An;M. Herrmann;Yan Zhao;Y. Miao
通讯作者：
Fuli Wu;X. Fang;Congrong An;M. Herrmann;Yan Zhao;Y. Miao
银川盆地PL02钻孔磁性地层学及其古气候意义
影响因子：
3
作者：
Wang Junping;Shen Miaomiao;Hu Jianmin;Wei Mingjian;Zhao Xiaohong;Liu Shaochang;Li Xiaolei;Li Xinling
通讯作者：
Li Xinling
影响因子：
2.2
作者：
M. Cai;Mingjian Wei;D. Xu;Y. Miao;Fuli Wu;Baolin Pan
通讯作者：
M. Cai;Mingjian Wei;D. Xu;Y. Miao;Fuli Wu;Baolin Pan
DOI：
10.1016/s0031-0182(98)00048-0
发表时间：
1998-07
期刊：
Palaeogeography, Palaeoclimatology, Palaeoecology
影响因子：
--
作者：
Li Ze-chun;Wang Yongjin;Chengzhi Ye;Liang Xuesong;Li Qingchen
通讯作者：
Li Ze-chun;Wang Yongjin;Chengzhi Ye;Liang Xuesong;Li Qingchen
从银川盆地花粉记录推断青藏高原东北部的阶段性隆升
影响因子：
4.6
作者：
Li X;Hao Q;Wei M;Andreev AA;Wang J;Tian Y;Li X;Cai M;Hu J;Shi W
通讯作者：
Shi W