Comparisons of observed and modelled lake δ18O variability

Jones, M.D. and Cuthbert, M.O. and Leng, Melanie J. and McGowan, Suzanne and Mariethoz, G. and Arrowsmith, C. and Sloane, Hilary J. and Humphrey, K.K. and Cross, Iain (2015) Comparisons of observed and modelled lake δ18O variability. Quaternary Science Reviews . ISSN 1873-457X (In Press)

WarningThere is a more recent version of this item available.
PDF - Requires a PDF viewer such as GSview, Xpdf or Adobe Acrobat Reader
Available under Licence Creative Commons Attribution Non-commercial No Derivatives.
Download (1MB) | Preview


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.

Item Type: Article
Schools/Departments: University of Nottingham UK Campus > Faculty of Social Sciences > School of Geography
Identification Number:
Depositing User: Jones, Dr Matthew
Date Deposited: 17 Nov 2015 11:55
Last Modified: 15 Sep 2016 03:01

Available Versions of this Item

Actions (Archive Staff Only)

Edit View Edit View