中国西南地区过去9万年以来定量温度数据集

该研究通过分析云南腾冲青海（Tengchongqinghai，TCQH）湖泊沉积岩芯中的支链甘油二烷基甘油四醚酯（brGDGTs）和叶蜡氢同位素，首次展示了末次冰期以来（过去8.8万年以来）低纬陆地高分辨率年均温度变化历史。根据TCQH岩心建立出的南亚年均温度，该区域存在8.8-7.1万年和4.5-2.2万年两个暖期，温度变幅约2-3 °C，这样的变幅基本达到了该区域冰期-间冰期的变幅，全新世以来温度呈持续增温趋势，升温约1-2°C。

This study analyzes branched glycerol dialkyl glycerol tetraethers (brGDGTs) and hydrogen isotopes of leaf waxes in the lacustrine sediment core from Tengchongqinghai Lake (TCQH) in Tengchong, Yunnan Province, and for the first time reconstructs the high-resolution annual mean temperature history of low-latitude terrestrial areas since the Last Glacial Period (over the past 88,000 years). Based on the South Asian annual mean temperature record derived from the TCQH sediment core, two warm periods are identified in this region: 88,000–71,000 years ago and 45,000–22,000 years ago, with a temperature amplitude of approximately 2–3 °C, which basically matches the glacial-interglacial temperature variation range of this region. Since the Holocene, the temperature has shown a continuous warming trend, with a total warming magnitude of about 1–2 °C.

搜集汇总

背景与挑战

背景概述

该数据集基于云南腾冲青海湖泊沉积岩芯的brGDGTs和叶蜡氢同位素分析，提供了中国西南地区过去9万年以来（特别是末次冰期以来）的高分辨率定量年均温度变化历史，揭示了两个暖期和全新世持续增温趋势。数据时间分辨率在100年至1000年之间，以开放获取方式共享，适用于古环境与古气候研究。