Late Glacial-Early Holocene climate evolution on the Tibetan Plateau: a trigger or a response to Northern Hemisphere climate change?

零星的古气候调查揭示了青藏高原晚冰期-全新世早期气候的强烈变化。根据模拟方法和现代气候研究，青藏高原气候变率对北方气候演变有很强的影响。尽管青藏高原具有重要的气候意义，但它的古气候研究却很少。因此，本研究旨在获得高分辨率的代用资料，并对青藏高原晚冰期-早全新世（19 - 8 cal. ka）的气候演变进行研究。BP）来阐明青藏高原的变化是如何与北方气候演变相联系的。初步研究表明，青藏高原及其周边地区全新世早期气候演化存在差异。因此，本研究进一步的目的是测试假设和机制造成这些空间差异。定量重建平均7月温度和年降水量将推断化石花粉光谱花粉气候转换函数。为此目的，已经获得了来自140个湖泊的地表样品（作为现代花粉数据校准集）和来自四个选定湖泊的沉积物岩心，并进行了初步分析。这项拟议中的研究将提供古气候类比，无论是最近的变暖还是青藏高原对北方半球气候变化的反应，还是触发气候变化。

Sporadic palaeoclimatic investigations revealed a strong climate variability during the Late Glacial and Early Holocene an the Tibetan Plateau. According to modelling approaches and modern climate studies, Tibetan Plateau climate variability should have a strong influence an the Northern Hemisphere climate evolution. Despite of its climatic significance, the Tibetan Plateau was rather seldom subject of palaeoclimatic studies. Therefore, this study aims to obtain high-resolution proxy-data an the climate evolution of the Tibetan Plateau during the Late Glacial and Early Holocene (19 - 8 cal. ka. BP) to illuminate how changes an the Tibetan Plateau are linked to the Northern Hemisphere climatic evolution. Preparatory investigations for this study yielded differences in the early Holocene climate evolution an the Tibetan Plateau and its surroundings. Therefore, this study furthermore aims to test hypotheses an mechanisms causing these spatial differences. Quantitative reconstructions of mean July temperature and annual precipitation will be inferred from fossil pollen spectra using pollen-climate transfer functions. For this purpose, surface samples from -140 lakes (as a modern pollen data calibration set) and sediment cores from four selected lakes have already been obtained and preliminary analyses have been performed. The proposed study was will provide palaeoclimatic analogies whether recent warming an the Tibetan Plateau responses to or rather triggers Northern Hemisphere climate change.