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dc.contributor.authorLeith, Fraser Ien_UK
dc.contributor.authorDinsmore, Kerry Jen_UK
dc.contributor.authorWallin, Marcus Ben_UK
dc.contributor.authorBillett, Michaelen_UK
dc.contributor.authorHeal, Kate Ven_UK
dc.contributor.authorLaudon, Hjalmaren_UK
dc.contributor.authorOquist, Mats Gen_UK
dc.contributor.authorBishop, Kevinen_UK
dc.description.abstractHeadwater streams export CO2 as lateral downstream export and vertical evasion from the stream surface. CO2 in boreal headwater streams generally originates from adjacent terrestrial areas, so determining the sources and rate of CO2 transport along the hillslope–riparian–stream continuum could improve estimates of CO2 export via the aquatic pathway, especially by quantifying evasion at higher temporal resolutions. Continuous measurements of dissolved CO2 concentrations and water table were made along the hillslope–riparian–stream continuum in the Västrabäcken sub-catchment of the Krycklan catchment, Sweden. Daily water and CO2 export from the hillslope and riparian zone were estimated over one hydrological year (October 2012–September 2013) using a flow-concentration model and compared with measured lateral downstream CO2 export. Total water export over the hydrological year from the hillslope was 230 mm yr-1 compared with 270 mm yr−1 from the riparian zone. This corresponds well (proportional to the relative upslope contributing area) to the annual catchment runoff of 265 mm yr−1. Total CO2 export from the riparian zone to the stream was 3.0 g CO2-C m−2 yr−1. A hotspot for riparian CO2 export was observed at 30–50 cm depth (accounting for 71 % of total riparian export). Seasonal variability was high with export peaks during the spring flood and autumn storm events. Downstream lateral CO2 export (determined from stream water dissolved CO2 concentrations and discharge) was 1.2 g CO2-C m−2 yr−1. Subtracting downstream lateral export from riparian export (3.0 g CO2-C m−2 yr−1) gives 1.8 g CO2-C m−2 yr-1 which can be attributed to evasion losses (accounting for 60 % of export via the aquatic pathway). The results highlight the importance of terrestrial CO2 export, especially from the riparian zone, for determining catchment aquatic CO2 losses and the importance of the CO2 evasion component to carbon export via the aquatic conduit.en_UK
dc.publisherCopernicus Publications on behalf of the European Geosciences Unionen_UK
dc.relationLeith FI, Dinsmore KJ, Wallin MB, Billett M, Heal KV, Laudon H, Oquist MG & Bishop K (2015) Carbon dioxide transport across the hillslope-riparian-stream continuum in a boreal headwater catchment. Biogeosciences, 12 (6), pp. 1881-1902.
dc.rights© Author(s) 2015. This work is distributed under the Creative Commons Attribution 3.0 License.en_UK
dc.titleCarbon dioxide transport across the hillslope-riparian-stream continuum in a boreal headwater catchmenten_UK
dc.typeJournal Articleen_UK
dc.type.statusVoR - Version of Recorden_UK
dc.contributor.affiliationCentre for Ecology & Hydrology (CEH)en_UK
dc.contributor.affiliationCentre for Ecology & Hydrology (CEH)en_UK
dc.contributor.affiliationUppsala Universityen_UK
dc.contributor.affiliationBiological and Environmental Sciencesen_UK
dc.contributor.affiliationUniversity of Edinburghen_UK
dc.contributor.affiliationSwedish University of Agricultural Sciencesen_UK
dc.contributor.affiliationSwedish University of Agricultural Sciencesen_UK
dc.contributor.affiliationUppsala Universityen_UK
rioxxterms.apcnot requireden_UK
rioxxterms.typeJournal Article/Reviewen_UK
local.rioxx.authorLeith, Fraser I|en_UK
local.rioxx.authorDinsmore, Kerry J|en_UK
local.rioxx.authorWallin, Marcus B|en_UK
local.rioxx.authorBillett, Michael|0000-0003-3737-6063en_UK
local.rioxx.authorHeal, Kate V|en_UK
local.rioxx.authorLaudon, Hjalmar|en_UK
local.rioxx.authorOquist, Mats G|en_UK
local.rioxx.authorBishop, Kevin|en_UK
local.rioxx.projectInternal Project|University of Stirling|
local.rioxx.filenameLeith et al_Biogeosciences_2015.pdfen_UK
Appears in Collections:Biological and Environmental Sciences Journal Articles

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