Demonstrating the potential of an annually-laminated lake record to evaluate landscape response to climate and anthropogenic forcing during the Holoce

我们对全新世气候复杂性的理解因人类与环境之间的相互作用以及缺乏关于景观响应和人类活动的替代记录的高分辨率年表而变得更加复杂。约会方面的改进旨在促进代理记录中对应激源的反应的整合。湖泊沉积物是景观敏感性的宝贵记录，记录了气候变化、人类活动和景观演变之间的复杂相互作用。迪斯米尔遗址(英国诺福克)提供了一个独特的机会来增进我们对全新世不列颠的了解，因为它每年的层状沉积物具有高的年代学分辨率和高的沉积速率。这个博士学位是围绕两个关键方法建立的。首先，对高分辨率迪斯米尔记录进行密码分析，这是一种精确的地层等时线，将沉积物与日历时间联系在一起。因此，DISS记录的年代很好，为古气候、古环境和考古学研究提供了理想的试验场。为了实现这一点，第二个关键方法使用高分辨率的孢粉数据，结合现有的代理数据。这适用于关键的时间片，沿着人类活动的梯度，从中石器时代到罗马时期，与快速的气候转变重合：8.2ka BP事件，2.8ka BP事件和罗马暖期。

Our understanding of Holocene climatic complexity is compounded by the interactions between humans and environment, and a lack of high-resolution chronologies for proxy records of landscape response and human activity. Improvements in dating are sought to facilitate the integration of responses in proxy records to stressors. Lake sediments constitute valuable records of landscape sensitivity, documenting the complex interplay between climate change, human activity, and landscape evolution. The site of Diss Mere (Norfolk, UK), offers a unique opportunity to improve our understanding of Holocene Britain owing to the high chronological resolution of its annually-laminated sediments and high sedimentation rates. This PhD is built around two key approaches. Firstly, cryptotephra analyses of the highly resolved Diss Mere record, which act as precise, stratigraphic isochrones, tying the sediments to calendar time. The well-dated, Diss record, thus, provides an ideal testing ground for palaeoclimatic, palaeoenvironmental, and archaeological studies. To achieve this, the second key approach uses high-resolution palynological data, combined with existing proxy data. This is applied to key time slices, along a gradient of human activity, from the Mesolithic to the Roman period, coinciding with rapid climatic transitions: the 8.2ka BP event, the 2.8 ka BP event, and the Roman warm period.