Mercury and Greenhouse Gas Concentrations in Streams/Lakes at the Cape Bounty Arctic Watershed Observatory, Melville Island

Beginning in 2007, St.Louis collected water samples weekly during the open-water season using ultra-clean sampling techniques for filtered and unfiltered concentrations of THg and MeHg. Samples were collected into Teflon bottles and preserved in the field with ultra-pure HCl, and analysed for THg and MeHg back at the University of Alberta Biogeochemistry Laboratory (UABL) using now standard U.S. Environmental Protection Agency analytical protocols. Fluxes of THg and MeHg from the landscape are calculated using measured THg and MeHg concentrations, and aerial water discharge volumes from the landscape. Each summer, St.Louis also collected water samples in specialized evacuated bottles containing a KCl preservative for analyses of dissolved concentrations of pCO2 and pCH4. Samples were collected every three days during the open water season from the East and West rivers just prior to them draining into East and West lakes to determine the flux of CO2 and CH4 from the rivers to the atmosphere, and the flux of CO2 and CH4 into the lakes. He also sampled East and West Lakes themselves, both at the surface (to calculate a surface flux of CO2 and CH4) and throughout the water column (to determine potential zones of CO2 and CH4 production in the lakes). Fluxes to the atmosphere are calculated using pCO2 and pCH4 concentrations, and piston velocities derived from wind speeds or river discharge.

Identifier
Source https://www.polardata.ca/pdcsearch/PDCSearchDOI.jsp?doi_id=11007
Metadata Access http://www.polardata.ca/oai/provider?verb=GetRecord&metadataPrefix=fgdc&identifier=11007_fgdc
Provenance
Creator Vincent St.Louis
Publisher Canadian Cryospheric Information Network
Contributor Polar Data Catalogue
Publication Year 2012
Rights Research programs, CCIN, or ArcticNet take no liability for the use or transmission of this data
OpenAccess true
Contact vince.stlouis(at)ualberta.ca; pdc(at)uwaterloo.ca
Representation
Language English
Format Computer file
Discipline Biogeochemistry
Spatial Coverage (-120.000W, 80.000S, -110.000E, 90.000N)
Temporal Coverage Begin 2007-04-01T00:00:00Z
Temporal Coverage End 2015-08-31T00:00:00Z