The effect of seasonal drying on sulphate dynamics in streams across southeastern Canada and the northeastern USA

TitleThe effect of seasonal drying on sulphate dynamics in streams across southeastern Canada and the northeastern USA
Publication TypeJournal Article
Year of Publication2012
AuthorsKerr, JG, Eimers, MC, Creed, IF, Adams, MB, Beall, F, Burns, D, Campbell, JL, Christopher, SF, Clair, TA, Courchesne, F, Duchesne, L, Fernandez, I, Houle, D, Jeffries, DS, Likens, GE, Mitchell, MJ, Shanley, J, Yao, H
JournalBiogeochemistry
Volume111
Issue1-3
Pagination393 - 409
Date Published2012/11/01/
ISBN Number0168-2563, 1573-515X
KeywordsBiogeosciences, Drought, Ecosystems, Environmental Chemistry, Forested streams, Life Sciences, general, Seasonal drying, Sulphate, Wetlands
Abstract

Within the southeast Canada and northeast USA region, a peak in sulphate (SO4 2−) concentration has been reported for some streams following periods of substantial catchment drying during the summer months (ON, Canada; VT, NH and NY, USA). However, it is currently unclear if a SO4 2− response to seasonal drying is widespread across the broader region, or to what extent the level of response varies among catchments. In our study, SO4 2− response to seasonal drying was compared in 20 catchments from 11 locations across southeastern Canada (ON, QC and NS) and northeastern USA (NH, NY, VT, WV and ME). Using long-term monitoring data of stream discharge and chemistry, the number of days for each month of the dry season (# d) when discharge (Q) was below a threshold level (25th percentile; Q25) was calculated for each catchment to give a measure of ‘seasonal dryness’ (# d Q

URLhttp://link.springer.com/article/10.1007/s10533-011-9664-1
Short TitleBiogeochemistry