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

人类与环境之间的相互作用，以及缺乏高分辨率的景观响应和人类活动代用记录的年表，使我们对全新世气候复杂性的理解更加复杂。为了促进代理记录中对压力源的反应的整合，研究人员试图改进测年方法。湖泊沉积物构成了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复杂的相互作用。Diss Mere（英国诺福克）的遗址提供了一个独特的机会来提高我们对全新世英国的理解，因为它的年层状沉积物和高沉积速率的年代学分辨率很高。这个博士学位是围绕两个关键方法建立的。首先，对高分辨率的Diss Mere记录进行隐层分析，作为精确的地层等时线，将沉积物与日历时间联系起来。因此，年代久远的Diss记录为古气候、古环境和考古研究提供了理想的试验场。为了实现这一目标，第二种关键方法使用高分辨率孢粉学数据，结合现有的代理数据。这被应用于关键的时间片段，沿着人类活动的梯度，从中石器时代到罗马时期，与快速的气候转变相一致：8.2ka BP事件，2.8 ka BP事件和罗马温暖期。

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.