Vegetation and climate changes during three interglacial periods represented in the Luochuan loess-paleosol section, on the Chinese Loess Plateau
Vegetation and climate changes during three interglacial periods represented in the Luochuan loess-paleosol section, on the Chinese Loess Plateau
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DOI：
10.1016/j.quaint.2012.06.041
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发表时间：
2013-05
影响因子：
2.2
通讯作者：
M. Cai;Mingjian Wei;D. Xu;Y. Miao;Fuli Wu;Baolin Pan
中科院分区：
文献类型：
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作者：
M. Cai;Mingjian Wei;D. Xu;Y. Miao;Fuli Wu;Baolin Pan
对与前几次间冰期气候变化有关的植被演替的研究为了解当前间冰期气候变化的机制提供了重要的见解，并使人们能够预测未来气候对生态系统的影响。中国黄土高原（CLP），这是特别敏感的气候变暖，提供了一个很好的网站，这样的研究。然而，很少有详细的记录存在的植被和气候变化在间冰期的CLP。本文通过对洛川黄土-古土壤剖面的高分辨率孢粉记录，讨论了前三个间冰期（MIS 9、MIS 7和MIS 5）的植被和气候历史。342 ~ 312 ka，该地区的蒿属-藜科草原植被在312 ~ 302 ka转变为草属-藜科草原，302 ka后又恢复为蒿属-藜科草原。250 ~ 237 ka，植被类型为蒿-藜科草原，237 ~ 227 ka，植被类型转变为蒿-草属草原。227 ~ 195 ka，植被恢复为蒿藜草原。在MIS 5期间，研究区植被从129 ~ 117 ka的松-蔷薇科-藜科森林草原向117 ~ 96 ka的蒿-草-毛茛科草原转变。96 ka后，植被类型转变为松桦藜科森林草原。将这些花粉记录与CLP的其他气候代用指标和太平洋的氧同位素记录进行比较，表明研究地点周围的植被和气候变化特征与65°N附近的东亚季风变化是同步的。区域构造抬升可能仅对MIS 5期间CLP的植被和气候变化产生次要影响。
Studies of vegetation successions related to climate changes during previous interglacial periods provide important insights into the mechanisms of climate change during the current interglacial and enable predictions of future climate impacts on ecosystems. The Chinese Loess Plateau (CLP), which is particularly sensitive to climate warming, presents an excellent site for such studies. However, few detailed records exist of vegetation and climate variations during interglacial periods on the CLP. This study obtained a series high resolution pollen records from the Luochuan loess-paleosol section on the CLP, and the paper discusses the vegetation and climate histories during three previous interglacial periods (MIS 9, MIS 7 and MIS 5). The Artemisia-Chenopodiaceae steppe vegetation that covered this area between 342 ka and 312 ka changed to Humulus-Chenopodiaceae steppe between 312 ka and 302 ka, and then reverted to Artemisia-Chenopodiaceae steppe after 302 ka. From 250 ka to 237 ka, the vegetation type remained Artemisia-Chenopodiaceae steppe, and then changed to Artemisia-Humulus steppe between 237 ka and 227 ka. Between 227 ka and 195 ka, the vegetation returned to Artemisia-Chenopodiaceae steppe. During MIS 5, vegetation of the study area changed from Pinus-Rosaceae-Chenopodiaceae forest-steppe between 129 ka and 117 ka, to Artemisia-Humulus-Ranunculaceae steppe from 117 ka to 96 ka. After 96 ka, the vegetation types changed to Pinus-Betula-Chenopodiaceae forest-steppe. Comparing these pollen records with other climatic proxies from the CLP and the oxygen isotope records from the Pacific Ocean suggests that vegetation and climate change features around the study site were synchronous with East Asian monsoon variations near 65°N. The regional tectonic uplift probably provided only a subordinate influence on vegetation and climate variation on the CLP during MIS 5.