@article{88bcc3b02b1d4cb384282e2bcbf5818d,
title = "Comparisons of observed and modelled lake δ18O variability",
abstract = "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.",
keywords = "Groundwater, Lakes, Modelling, Oxygen isotopes",
author = "M.D. Jones and M.O. Cuthbert and M.J. Leng and S. McGowan and G. Mariethoz and C. Arrowsmith and H.J. Sloane and K.K. Humphrey and I. Cross",
note = "CODEN: QSRED Funding details: Seventh Framework Programme, FP7, 299091 Funding details: Natural Environment Research Council, NERC, nigl010001 Funding details: Royal Society Funding details: Research Councils UK, RCUK, EP/E500102/1 Funding details: University of New South Wales, UNSW Funding details: University of Queensland, UQ Funding details: Seventh Framework Programme, FP7 Funding text 1: We thank the NERC Isotope Geoscience Facilities ( IP/855/0505 ), the School of Geography, University of Nottingham , and CEMEX UK Ltd ( 299091 ) for funding to make this work possible. MDJ was supported by an RCUK Academic Fellowship ( EP/E500102/1 ), part of this work was undertaken whilst MDJ was the beneficiary of a Royal Society Travel Grant to the University of New South Wales and the final version of the manuscript was written whilst a visiting Fellow in the School of Geography, Planning and Environmental Management at the University of Queensland. MOC was supported by funding from the European Community's Seventh Framework Programme ([FP7/2007-2013] under grant agreement n°299091. We thank Teresa Needham, Lorelei Benoit, Graham Morris and Ian Conway for field and laboratory support and Nottinghamshire Wildlife Trust, the Attenborough Nature Centre and Nottingham City Council for site access. The CET and EWP data sets were downloaded from www.metoffice.gov.uk/hadobs . Jara Imbers and Randy Hunt provided thoughtful discussion in the early stages of this work and we thank Byron Steinman and an anonymous referee for thorough reviews of this manuscript which significantly improved the paper.",
year = "2016",
doi = "10.1016/j.quascirev.2015.09.012",
language = "English",
volume = "131",
pages = "329--340",
journal = "Quaternary Science Reviews",
issn = "0277-3791",
publisher = "Elsevier Limited",
}