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Palynological investigation of a Holocene profile section from the Palaeo-Gaxun- Nur-Basin

机译:古隆起-努尔盆地的全新世剖面剖面的孢粉学研究

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摘要

Palynological investigations on lacustrine sediment samples revealed a general dominance of open Ar-temisia-Chenopodiaceae vegetation in the Palaeo-Gaxun-Nur-Basin (Inner Mongolia) between 5250 and 3500 cal. aBP. Riverside woods (Hippophaee, Populus) developed between 3500 — 3250 cal. aBP and reflect moister growing conditions. During the following moist-dry transition pronounced cooling occurred around 3000 cal. aBP, in upper elevations favouring the spread of montane woods (Picea, Betula). Aridity strongly increased from 2900 to 2700 cal. aBP. The recorded vegetational and environmental changes after 3500 cal. aBP can be correlated with glacier advances in the mountains and with a humid phase in the Tengger Shamo followed by desertification.
机译:对湖泊沉积物样本的孢粉学调查显示,内蒙古古隆-加克森-努尔-巴辛的内陆开放的Ar-Temisia-Chenopodiaceae植被在5250至3500 cal之间具有普遍优势。血压沿河森林(希波菲,胡杨)在3500至3250卡路里之间发展。 aBP并反映出潮湿的生长条件。在随后的干湿过渡过程中,大约3000摄氏度发生了明显的冷却。 aBP,在高海拔地区,有利于山地树林的蔓延(Picea,Betula)。干旱从2900卡路里大幅增加到2700卡路里。血压3500 cal后记录的植被和环境变化。 aBP可能与山区的冰川发展以及腾格里莫(Tengger Shamo)的湿润阶段以及随后的荒漠化有关。

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