New insights into rapid climate events from Galapagos and Southern Ocean deep-sea corals

对加拉帕戈斯群岛和南大洋深海珊瑚快速气候事件的新见解

基本信息

批准号：
2282612
负责人：
金额：
--
依托单位：
University of Bristol
依托单位国家：
英国
项目类别：
Studentship
财政年份：
2019
资助国家：
英国
起止时间：
2019 至无数据
项目状态：
已结题

来源：
https://gtr.ukri.org/projects?ref=studentship-2282612
关键词：
New insights into rapid climate

项目摘要

The unprecedented rise in greenhouse gases over recent decades has emphasised the importance of examining the links between carbon and climate during intervals of rapid warming. The last glacial termination (~18-10 ka) witnessed rapid (decadal) increases in atmospheric pCO2 and temperature, thus presenting a unique opportunity to examine the links between the carbon cycle and global climate on timescales relevant to the modern day. The ocean doubtless plays an important role but a major challenge remains finding suitable archives that record how the deep sea behaves. Deep-sea corals offer a solution to this problem. Unlike reef-forming corals found in shallow tropical areas, deep-sea corals do not have algal symbionts so they are not restricted to shallow waters. This project offers the opportunity to establish high resolution deep-sea climate records from Stylasterid corals. Stylasterid corals are widespread in the global ocean, and their geochemistry reflects their growth conditions- however they have not been previously been used in studies of the past - opening up an exciting new field of research. The aim will be to develop and use the skeletons of fossil deep-sea Stylasterid corals to provide unique insights into the oceanic processes in the past with a focus on the last deglacial transition. The PhD will include development of geochemical proxies and radiometric dating techniques, reconstructions of past oceanographic conditions and interpretations in light of global climate and environmental change.

近几十年来，温室气体的前所未有的升高强调了在快速变暖间隔期间检查碳与气候之间的联系的重要性。最后的冰川终止（〜18-10 ka）见证了大气PCO2和温度的迅速增加（年代际），从而带来了一个独特的机会，可以检查碳循环与与现代相关的时间表上的碳循环与全球气候之间的联系。毫无疑问，海洋起着重要作用，但一个重大挑战是找到合适的档案，记录深海的行为方式。深海珊瑚为这个问题提供了解决方案。与在浅层热带地区发现的珊瑚礁形成珊瑚不同，深海珊瑚没有藻类共生体，因此它们不仅限于浅水。该项目提供了从Stylasterid Corals建立高分辨率深海气候记录的机会。 Stylasterid珊瑚在全球海洋中很普遍，它们的地球化学反映了它们的生长条件 - 但是，以前尚未在过去的研究中使用它们 - 开辟了一个令人兴奋的新研究领域。目的是开发和使用化石深海静脉内掌握珊瑚的骨骼，以对过去的海洋过程提供独特的见解，重点是最后一次冰乳转变。博士学位将包括地球化学代理和辐射测年技术的发展，过去海洋学条件的重建以及根据全球气候和环境变化的解释。