Long-term chloride concentrations in north american and european freshwater lakes

Hilary A. Dugan (1, 2) , Jamie C. Summers (3) , Nicholas K. Skaff (4) , Flora E. Krivak-Tetley (5) , Jonathan P. Doubek (5) , Samantha M. Burke (6) , Sarah L. Bartlett (7) , Lauri Arvola (8) , Hamdi Jarjanazi (9) , János Korponai (10, 11) , Andreas Kleeberg (12) , Ghislaine Monet (13) , Don Monteith (14) , Karen Moore (15) , Michela Rogora (16) , Paul C. Hanson (1) , Kathleen C. Weathers (2)

1 Center for Limnology
2 Cary Institute of Ecosystem Studies
3 Queen's University
4 Department of Fisheries and Wildlife
5 Department of Biological Sciences
6 University of Waterloo [Waterloo]
7 School of Freshwater Sciences
8 LBS - Lammi Biological Station
9 Environmental Monitoring and Reporting Branch
10 Limnoecology Research Group
11 Department of Chemistry and Environmental Sciences
12 Leibniz-Institute of Freshwater Biology and Inland Fisheries
13 CARRTEL - Centre Alpin de Recherche sur les Réseaux Trophiques et Ecosystèmes Limniques
14 Lancaster Environment Centre
15 NYC DEP - New York City Department of Environmental Protection
16 Institute of Ecosystem Study - CNR

Anthropogenic sources of chloride in a lake catchment, including road salt, fertilizer, and wastewater, can elevate the chloride concentration in freshwater lakes above background levels. Rising chloride concentrations can impact lake ecology and ecosystem services such as fisheries and the use of lakes as drinking water sources. To analyze the spatial extent and magnitude of increasing chloride concentrations in freshwater lakes, we amassed a database of 529 lakes in Europe and North America that had greater than or equal to ten years of chloride data. For each lake, we calculated climate statistics of mean annual total precipitation and mean monthly air temperatures from gridded global datasets. We also quantified land cover metrics, including road density and impervious surface, in buffer zones of 100 to 1,500m surrounding the perimeter of each lake. This database represents the largest global collection of lake chloride data. We hope that long-term water quality measurements in areas outside Europe and North America can be added to the database as they become available in the future.

Mots clés: chlorides; sweet water; open water

Mots clés: chlorure; eau douce; lac; amérique du nord; europe

Domaines: Sciences du Vivant [q-bio]

Hilary A. Dugan, Jamie C. Summers, Nicholas K. Skaff, Flora E. Krivak-Tetley, Jonathan P. Doubek, et al.. Long-term chloride concentrations in north american and european freshwater lakes. Scientific Data , 2017, 4, pp.170101. ⟨10.1038/sdata.2017.101⟩. ⟨hal-01608902⟩