Impact of global warming during the penultimate termination on regional hydroclimates in the Dead Sea and Lake Van

地中海地区对当前全球变暖高度敏感，这对水文气候和极端天气事件的发生有很大影响。然而，从死海和凡湖重建的湖平面揭示了过去全球气候变化导致的相反的降雨量变化。然而，当地在气候变暖期间的反应仍然不清楚。我们的目标是在从倒数第二次冰川到最后一次间冰期的过渡期间，对这两个地点进行详细和综合的比较，后者是过去800 KYR中最温暖的间冰期。长死海ICDP钻探现场5017-1和凡湖钻探现场5034-1(Ahlat Ridge)的层状湖泊沉积物为研究全球变暖对水文气候的影响提供了独特的档案。这些沉积物与区域水文气候条件密切相关，并将用于重建年际时间尺度上的变化。我们将用叶蜡氢同位素(δD)分析来补充这些重建，以追踪大气环流、水蒸气输送和季节性降雨模式的变化。通过D重建，从死海沉积物记录中获得了冰期-间冰期循环的区域连贯特征。这里提出的十年至百年重建建议将提供关于倒数第二次冰川变暖至最后一次间冰期期间降水制度的关键见解。此外，这些记录的详细年代地层对比将使用最新的Varive年龄深度模拟和(密码)年代学，以最大限度地减少年龄不确定性。这些详细的天气重建将有助于全面了解地中海东部地区过去的气候动态和全球联系，这是第四纪晚期变暖最强烈的时期之一。

The Mediterranean region is highly sensitive to the current global warming, which has a strong influence on the hydroclimate and the occurrence of extreme weather events. However, lake level reconstructions from the Dead Sea and Lake Van reveal contrasting rainfall variability due to past global climatic changes. Yet local responses during warming climates are still not understood. We aim here to provide a detailed and integrated comparison between these two locations during the transition from the penultimate glaciation to the last interglacial, which was the warmest interglacial of the last 800 kyr. The laminated lacustrine sediments of the long Dead Sea ICDP drilling Site 5017-1 and Lake Van drilling Site 5034-1 (Ahlat Ridge) provide unique archives to study the impact of global warming on the hydroclimates. These sediments are strongly linked to regional hydroclimatic conditions and will be used for reconstructing changes at an interannual time scale. We will complement these reconstructions with analyses of leaf wax hydrogen isotopes (δD) to trace variations in atmospheric circulation, water vapor transport, and seasonal rainfall patterns. Regionally coherent signatures of glacial-interglacial cycles have been obtained from the Dead Sea sediment record using D reconstructions. The proposed decadal to centennial reconstruction proposed here will provide key insights into precipitation regimes during warming of the penultimate glaciation to the last interglacial. In addition, detailed chronostratigraphic correlation of these record will be performed using the latest varve age-depth modelling and (crypto)tephrochronology to minimize the age uncertainties. These detailed synoptic reconstructions will contribute to a comprehensive picture of past climatic dynamics and global linkages over the eastern Mediterranean during one of the strongest warming intervals of the Late Quaternary.