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

青藏高原晚冰期-早全新世气候演化：北半球气候变化的触发因素还是响应？

• 批准号: 16318205
• 负责人: Professorin Dr. Ulrike Herzschuh
• 金额: --
• 依托单位: Institut für Geowissenschaften
• 依托单位国家: 德国
• 项目类别: Research Grants
• 财政年份: 2005
• 资助国家: 德国
• 起止时间: 2004-12-31 至 2008-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/16318205?language=en
• 关键词: Late; Glacial; Early; Holocene; climate

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.

ka。因此，本研究旨在进一步验证导致这些空间差异的假设和机制。利用花粉-气候传递函数从化石花粉谱中定量重建七月平均气温和年降水量。为此，已经获得了-140个湖泊（作为现代花粉数据校准集）的地表样本和4个选定湖泊的沉积物岩心，并进行了初步分析。