中文摘要：

陆地温度的定量重建一直是古气候研究领域最具挑战性的工作之一。古温度定量记录不仅可以为气候模式的输出结果提供验证，同时也可为全球变化背景下过去温度提供参考。长链不饱和烯酮化合物的发现及有机地球化学分析手段的提高为古温度定量重建提供了可能。新生代以来青藏高原的隆升对东亚环境演变产生显著影响，其在全球气候变化研究中具有重要位置，然而高质量的古气候定量记录在青藏高原仍十分缺乏，极大限制了对高原气候变化机制的深入理解。近年来利用长链不饱和烯酮指标重建水体温度在海洋及陆地湖泊环境得到了广泛应用。青藏高原湖泊具有分布广、数量多等特点，是利用长链烯酮开展古气候定量重建的理想区域。本文通过对已发表的湖泊长链烯酮研究手段及相关成果进行总结，以青藏高原湖泊烯酮研究现状为背景，对高原烯酮研究提出展望。

英文摘要：

Quantitative temperature reconstruction has always been one of the most challenging issues in paleoclimate research. It can potentially verify the simulations of climate change and provide necessary background knowledge for past temperature in the context of global change. With the discovery of long-chain unsaturated alkenones and the development of organic geochemistry, which provide the possibility for the quantitative reconstruction. The Tibetan Plateau has played an important role in global climate change research due to its influence on the environmental evolution in East Asia since the Cenozoic. However, high-quality paleoclimate records are still limited which greatly restrict our understanding of the climatic mechanisms. During the last three decades, the long-chain alkenones-based proxies have been widely used in water temperature reconstructions, both in marine and lake environment. In addition, the plateau offers an ideal natural laboratory for paleoclimate reconstruction using alkenones as there is a wide distribution and large number of lakes. This paper will summary the up-to-date alkenones research in lakes, including the following aspects： alkenone-producing haptophyte algae, calibration methods for alkenone paleothermometer, alkenone-based proxies and the sedimentary alkenone records, with its focus on Tibetan Plateau lakes to present prospects for the future studies on alkenones in this region.