Spatial variability of 2H and 18O composition of meteoric freshwater lakes in Scotland.

Hoogewerff, Jurian; Kemp, Helen F.; Leng, Melanie J.; Meier-Augenstein, Wolfram

Abstract

Coastal regions, and in particular islands where precipitation from clouds formed out at sea occurs for the first time, are prime candidates for regions where 2H and 18O composition of precipitation will deviate significantly from the global mean geographic and physiographic trends of vapour-transport patterns. The results reported here are the outcome of a study that aimed to test this hypothesis by ‘isotopographically’ mapping the characteristic δ2H and δ18O signatures of Scottish freshwaters. The resulting isotope abundance landscapes or ‘isoscapes’ will underpin studies aiming to authenticate origin of Scottish produce but may also offer a baseline against which environmental changes could be assessed. Between April 2011 and May 2012 freshwater samples were collected from 127 different freshwater lochs and reservoirs across Scotland, and analysis results were compared to precipitation data provided by the British Geological Survey. Here we present the results of the 2H and 18O analyses of these water samples as well as the first detailed Scotland freshwater isoscapes with a grid resolution of about 5 × 5 km (0.05 degrees).

Citation

HOOGEWERFF, J., KEMP, H.F., LENG, M.J. and MEIER-AUGENSTEIN, W. 2019. Spatial variability of 2H and 18O composition of meteoric freshwater lakes in Scotland. Isotopes in environmental and health studies [online], 55(3), pages 237-253. Available from: https://doi.org/10.1080/10256016.2019.1609958

• Journal Article Type: Article
• Acceptance Date: Apr 4, 2019
• Online Publication Date: Apr 30, 2019
• Publication Date: Jun 30, 2019
• Deposit Date: May 3, 2019
• Publicly Available Date: May 1, 2020
• Journal: Isotopes in Environmental and Health Studies
• Print ISSN: 1025-6016
• Electronic ISSN: 1477-2639
• Publisher: Taylor and Francis
• Peer Reviewed: Peer Reviewed
• Volume: 55
• Issue: 3
• Pages: 237-253
• DOI: https://doi.org/10.1080/10256016.2019.1609958
• Keywords: Coastal regions; Continental effect; D-excess; Evaporated rain; Freshwater; Hebrides; Hydrogen-2; Island; Isoscapes; Isotope hydrology; Latitude effect; Oxygen-18; Precipitation; Scotland; Western Isles
• Public URL: https://rgu-repository.worktribe.com/output/239925
• Contract Date: May 6, 2019