Holocene vegetation evolution and climatic dynamics inferred from an ombrotrophic peat sequence in the southern Altai Mountains within China
Holocene vegetation evolution and climatic dynamics inferred from an ombrotrophic peat sequence in the southern Altai Mountains within China
复制标题
中国阿尔泰山南部的蒙营养泥炭序列推断的全新世植被演化和气候动态
DOI：
10.1016/j.gloplacha.2019.05.003
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发表时间：
2019
影响因子：
3.9
通讯作者：
Zhang Dongliang
中科院分区：
文献类型：
--
作者：
Wang Wei;Zhang Dongliang
根据中国山脉南部克拉萨齐泥炭550 cm岩心的274个样品的花粉数据，重建了全新世的植被动态和气候变化。花粉组合和相关的生物群得分表明，克拉萨齐河谷的植被在全新世早期(约8.2 CAL之前)以高山草甸为主。KYR BP)和全新世中期(~8.2KYR BP~5.6KYR BP)的泰加森林。KYR BP)，之后是高山草甸的扩张(~5.6-~3.2 卡.KYR BP)。基于花粉的温度指数表明，最大热值持续在~8.0%~5.6% CAL之间。KYR BP在60-30°N范围内与温度堆积相一致，克拉萨兹泥炭晚开始变暖与全新世早期残留冰盖的冷却影响有关。克拉萨齐泥炭的花粉水分指数增加曲线与阿拉泰山脉及周边低海拔地区综合干旱指数曲线在~12.0~3.2 CAL的数据重叠期内具有较好的一致性。KYR BP。克拉萨齐泥炭全新世的湿润趋势可能不仅是由于与NAO相关的冬季降水的增加趋势，也是由于AMO调制的夏季降水的增加趋势所致。
Based on pollen data of 274 samples from a 550-cm core at Kelashazi Peat in the southern Altai Mountains within China, we reconstructed the Holocene vegetation dynamics and climatic change. The pollen assemblages and the associated biome scores indicate that the vegetation in Kelashazi valley was dominated by alpine meadows during the early Holocene (before ~8.2 cal. kyr BP) and by taiga forests in the middle Holocene (~8.2-~5.6 cal. kyr BP) that was followed by an expansion of alpine meadows (~5.6-~3.2 cal. kyr BP). The pollen-based temperature index-indicated thermal maximum lasting from ~8.0 to ~5.6 cal. kyr BP was consistent with temperature stack for 60–30°N and the later onset warming at Kelashazi Peat was associated with the cooling influence of remnant ice sheets in the early Holocene. The pollen-based increasing moisture index curve from Kelashazi Peat is in a good agreement with the synthesized decreasing aridity index curve in low-elevation regions of the Altai Mountains and the surrounding areas during the data-overlapping period between ~12.0 and ~3.2 cal. kyr BP. The Holocene wetting trend at Kelashazi Peat might have resulted not only from the increasing trend of NAO-related winter precipitation but also from the increasing trend of AMO-modulated summer precipitation.