globalchange  > 过去全球变化的重建
DOI: 10.1016/j.quascirev.2015.09.012
Scopus记录号: 2-s2.0-84949636564
论文题名:
Comparisons of observed and modelled lake δ18O variability
作者: Jones M.D.; Cuthbert M.O.; Leng M.J.; McGowan S.; Mariethoz G.; Arrowsmith C.; Sloane H.J.; Humphrey K.K.; Cross I.
刊名: Quaternary Science Reviews
ISSN: 2773791
出版年: 2016
卷: 131
起始页码: 329
结束页码: 340
语种: 英语
英文关键词: Groundwater ; Lakes ; Modelling ; Oxygen isotopes
Scopus关键词: Climate change ; Evaporation ; Groundwater ; Isotopes ; Models ; Monitoring ; Climatic variables ; Groundwater exchanges ; Hydrological characteristics ; Isotope compositions ; Lake sediments ; Long term monitoring ; Mass balance model ; Oxygen isotopes ; Lakes ; climate variation ; comparative study ; groundwater ; isotopic composition ; lacustrine deposit ; lake water ; monitoring ; oxygen isotope ; paleoclimate ; England ; Midlands [England] ; United Kingdom
英文摘要: With the substantial number of lake sediment δ18O records published in recent decades, a quantitative, process-based understanding of these systems can increase our understanding of past climate change. We test mass balance models of lake water δ18O variability against five years of monthly monitoring data from lakes with different hydrological characteristics, in the East-Midlands region of the UK, and the local isotope composition of precipitation. These mass balance models can explain up to 74% of the measured lake water isotope variability. We investigate the sensitivity of the model to differing calculations of evaporation amount, the amount of groundwater, and to different climatic variables. We show there is only a small range of values for groundwater exchange flux that can produce suitable lake water isotope compositions and that variations in evaporation and precipitation are both required to produce recorded isotope variability in lakes with substantial evaporative water losses. We then discuss the potential for this model to be used in a long-term, palaeo-scenario. This study demonstrates how long term monitoring of a lake system can lead to the development of robust models of lake water isotope compositions. Such systematics-based explanations allow us to move from conceptual, to more quantified reconstructions of past climates and environments. © 2015 The Authors.
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/59727
Appears in Collections:过去全球变化的重建

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作者单位: School of Geography, University of Nottingham, Nottingham, United Kingdom; Connected Waters Initiative Research Centre, University of New South Wales, Sydney, Australia; School of Geography, Earth and Environmental Sciences, University of Birmingham, Birmingham, United Kingdom; Centre for Environmental Geochemistry, University of Nottingham, Nottingham, United Kingdom; NERC Isotope Geosciences Facilities, British Geological Survey, Nottingham, United Kingdom; School of Geography, University of Nottingham Malaysia Campus, Jalan Broga, Semenyih, Selangor Darul Ehsan, Malaysia; Institute of Earth Surface Dynamics (IDYST), University of Lausanne, Lausanne, Switzerland; Jacobs SKM, Perth, Australia; School of Management and Social Sciences, St Mary's University, Waldegrave Road, Twickenham, United Kingdom

Recommended Citation:
Jones M.D.,Cuthbert M.O.,Leng M.J.,et al. Comparisons of observed and modelled lake δ18O variability[J]. Quaternary Science Reviews,2016-01-01,131
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