Forest or no forest: implications of the vegetation record for climatic stability in Western Beringia during Oxygen Isotope Stage 3
Forest or no forest: implications of the vegetation record for climatic stability in Western Beringia during Oxygen Isotope Stage 3
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森林或无森林：氧同位素阶段 3 期间植被记录对西白令海峡气候稳定性的影响
DOI：
10.1016/j.quascirev.2010.12.022
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发表时间：
2011
影响因子：
4
通讯作者：
P. Anderson
中科院分区：
文献类型：
--
作者：
A. Lozhkin;P. Anderson
两个相互冲突的地层方案描述西伯利亚Karginskii interstade（相当于氧同位素第3阶段）具有：1）相对稳定的气候，环境更类似于完整的冰川;或2）多变的气候，景观更接近当代。新的数据从连续的湖芯和一个几乎连续的部分从西白令海（WB）表明，这两个方案是有效的。草本植物占主导地位的社区，可能与孤立的人口落叶松，特点北方WB只有轻微的转变，从相对温暖到凉爽的夏季在中期interstade。相比之下，草本和灌木苔原，草原，森林苔原，现代落叶松林发生在不同的时间在WB南部地区，这表明更大的气候不稳定性。一个热的最佳是明显的南部在中期interstade，与现代植被在西南部的西南部的WB和落叶松森林苔原。白皮松花粉的变化表明，夏季温暖/冬季干燥和夏季温暖/冬季潮湿的条件在西南部。这些波动与世界银行的其他地区形成鲜明对比，那里的夏季和冬季可能一直干旱。虽然该区间在晚更新世呈现出独特的间隔，但古数据和古气候模型表明，包括海平面在内的海洋条件的变化可能是该区域气候历史的关键驱动因素。
Two conflicting stratigraphic schemes describe the Siberian Karginskii interstade (Oxygen Isotope Stage 3 equivalent) as having: 1) relatively stable climate with environments more similar to the full glaciation; or 2) variable climate with landscapes that more closely approximate contemporary ones. New data from continuous lake cores and a nearly continuous section from western Beringia (WB) suggest that both schemes are valid. Herb-dominated communities, possibly with isolated populations of Larix, characterized northern WB with only a slight shift from relatively warm to cool summers during the mid-interstade. In contrast, herb and shrub tundra, steppe, forest-tundra, and modern Larix forest occurred at various times in areas of southern WB, suggesting greater climatic instability. A thermal optimum is evident in the south during the mid-interstade, with modern vegetation in southeastern WB and Larix forest-tundra in the southwest. Variations in Pinus pumila pollen indicate summer warm/winter dry and summer warm/winter wet conditions in southeastern WB. These fluctuations contrast to other areas of WB, where summers and probably winters were consistently arid. Although the interstade presents a unique interval within the Late Pleistocene, paleodata and paleoclimatic models suggest that changes in marine conditions, including sea level, were likely key drivers in the regional climate history.
影响因子：
4
作者：
Binney, Heather A.;Willis, Katherine J.;Vazhenina, Ludmila
通讯作者：
Vazhenina, Ludmila