Vegetation and environmental changes during the last interglacial in eastern Anatolia (Turkey): a new high-resolution pollen record from Lake Van
Vegetation and environmental changes during the last interglacial in eastern Anatolia (Turkey): a new high-resolution pollen record from Lake Van
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安纳托利亚东部（土耳其）末次间冰期期间的植被和环境变化：来自凡湖的新高分辨率花粉记录
DOI：
10.1016/j.palaeo.2015.06.015
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发表时间：
2015
期刊：
影响因子：
--
通讯作者：
Djamali
中科院分区：
文献类型：
--
作者：
Pickarski;Kwiecien;Djamali
一个高分辨率的多代理记录从湖货车，安纳托利亚东部，来自一个湖泊序列在357米深的阿赫拉特脊（AR）取芯，允许在最后一次间冰期（LI）在大陆近东的古气候和环境历史的全面看法。我们结合古植被（花粉），稳定氧同位素（δ 18 Obulk）和XRF数据从同一个沉积序列，显示在135至110万年前的期间，导致和完全间冰期条件下的明显变化。最后一次间冰期高原，作为定义的存在嗜热草原森林群落，持续约。13.5货车湖详细的孢粉序列记录了一个具有多个气候阶段的植被演替过程：（I）黄连木（Pistaciazone，约129.1-115.6 ka BP）; 131.2- 129.1kaBP），表明气候变暖初期夏季干燥，冬季温和; 129.1- 127.2kaBP）发生在温暖潮湿的气候条件下，蒸发增强; 127.2- 124.1kaBP），表明全球气候条件逐渐变冷和变湿;（IV）Pinusat ~ 124.1kaBP的扩张标志着全球气候环境开始变冷/变干，并一直延续到全球冰增长期。花粉数据表明，在末次间冰期开始时，喜热树木从避难所迁移。类似于目前的间冰期，迁移文件之间的时间间隔的气候改善和建立一个橡树草原森林，跨越2.1万年。因此，最后一次间冰期与当前间冰期（全新世）之间的主要区别是松的丰度以及落叶阔叶树的减少，表明在最后一次间冰期期间更高的大陆性。最后，我们的研究结果表明，在低中纬度地区的间冰期内的变化，并建议与格陵兰冰芯记录的高频气候变化的密切联系。
A high-resolution multi-proxy record from Lake Van, eastern Anatolia, derived from a lacustrine sequence cored at the 357 m deep Ahlat Ridge (AR), allows a comprehensive view of paleoclimate and environmental history in the continental Near East during the last interglacial (LI). We combined paleovegetation (pollen), stable oxygen isotope (δ18Obulk) and XRF data from the same sedimentary sequence, showing distinct variations during the period from 135 to 110 ka ago leading into and out of full interglacial conditions. The last interglacial plateau, as defined by the presence of thermophilous steppe-forest communities, lasted ca. 13.5 ka, from ~ 129.1–115.6 ka BP.The detailed palynological sequence at Lake Van documents a vegetation succession with several climatic phases: (I) thePistaciazone (ca. 131.2–129.1 ka BP) indicates summer dryness and mild winter conditions during the initial warming, (II) theQuercus-Ulmuszone (ca. 129.1–127.2 ka BP) occurred during warm and humid climate conditions with enhanced evaporation, (III) theCarpinuszone (ca. 127.2–124.1 ka BP) suggest increasingly cooler and wetter conditions, and (IV) the expansion ofPinusat ~ 124.1 ka BP marks the onset of a colder/drier environment that extended into the interval of global ice growth. Pollen data suggest migration of thermophilous trees from refugial areas at the beginning of the last interglacial. Analogous to the current interglacial, the migration documents a time lag between the onset of climatic amelioration and the establishment of an oak steppe-forest, spanning 2.1 ka. Hence, the major difference between the last interglacial compared to the current interglacial (Holocene) is the abundance ofPinusas well as the decrease of deciduous broad-leaved trees, indicating higher continentality during the last interglacial. Finally, our results demonstrate intra-interglacial variability in the low mid-latitudes and suggest a close connection with the high-frequency climate variability recorded in Greenland ice cores.
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发表时间：
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2000
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Netherlands Journal of Geosciences
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