RAPID: Analyzing dDwax in the Dead Sea DSDDP Core as an Indicator of Aridity and a Stratigraphic Aid

技术描述此拨款将支持使用&amp；#948；Dwax代理作为地层指南和最近钻探的死海深部钻探项目（DSDDP）沉积物过去干旱变化的指标。这些结果将用于细化岩心地层，这必须在进行进一步分析之前完成。该项目将产生200ka &amp；#948；来自死海DSDDP岩心的Dwax记录将为DSDDP岩心提供关键的地层控制，有助于解释主要气候事件，如最后一次间冰期死海的干燥，以及了解黎凡特地区过去干旱的变化，包括冰期水文气候的状态，围绕这一点有很多争论。&#948；Dwax源于其追踪海洋同位素阶段的清晰能力，使其能够相对比较在全球海相同位素地层学背景下，可以解释岩心中的Dwax和其他代用物。这些的发展&amp；#948；Dwax数据将在DSDDP项目的国际进展中发挥关键作用，因为测年结果将允许将其他代理和岩心描述工作置于时间背景下。本研究将调查来自当地洞穴石笋的结果之间的明显不一致，这些结果表明在最后一个冰期周期（大约2000年）长期干旱。10万年前)和死海在这段时间内明显的间歇性高水位（科学家们称之为更大的利桑湖，深约250米，一直向北延伸到加利利海/太比利亚湖，向南延伸到目前海岸线以外150公里处）。这项研究将支持通过东北大学合作教育项目招募的一名早期职业研究员、一名技术人员和一名本科生实习生。PI还将通过法尔茅斯学院实习计划（法尔茅斯学院和WHOI之间正在进行的合作），在她的实验室接待积极进取的高中生，从而促进当地的外展工作。这些学生将参与死海项目的各个方面，并了解气候变化对黎凡特地区的影响。将促进与德国、以色列和日本同事的国际合作。

Technical DescriptionThis grant will support the use of the δDwax proxy as a stratigraphic guide and as an indicator of past changes in aridity for sediments from the recently-drilled Dead Sea Deep Drilling Project (DSDDP). The results will be used to refine the core stratigraphy, which must be achieved before further analyses are conducted. The project will produce a preliminary 200ka δDwax record from the Dead Sea DSDDP core that will provide critical stratigraphic control on the DSDDP core, aiding the interpretation of major climatic events such as the desiccation of the Dead Sea during the last interglacial period, and insights into changes in past aridity in the Levant region, including the state of hydroclimate during glacial periods, around which there is much debate. The stratigraphic utility of δDwax derives from its clear ability to track Marine Isotope Stages, enabling relative comparisons between δDwax and other proxies in the core that can be interpreted in the context of global marine isotope stratigraphy. The development of these δDwax data will play a critical role in the international progress of the DSDDP project as the dating results will allow other proxies and core description work to be put into temporal context.Non-Technical DescriptionThis research will investigate the apparent discordance between results from local cave stalagmites, which indicate long droughts during the last glacial cycle (approx. 100,000 years) and the apparent intermittent high levels of the Dead Sea during this time (known to scientists as the much larger Lake Lisan, which was ~250m deeper, and extended all the way North to the Sea of Galilee/Lake Tiberias, and South to 150km beyond the current shoreline).The research will support an early career researcher, a technician, and an undergraduate intern recruited through the Northeastern University cooperative education program. The PI will also facilitate local outreach efforts by hosting motivated high school students in her lab through the Falmouth Academy Internship program, an ongoing collaboration between Falmouth Academy and WHOI. These students will participate in aspects of the Dead Sea project and learn about the effects of climate change on the Levant region. International collaboration with colleagues from Germany, Israel and Japan will be facilitated.