Dissolved Carbon, ions, and Suspended Material concentrations in snowmelt and glacial meltwater streams at Expedition Fiord, Nunavut, July 2019

Snow and glacier runoff serve as important conduits for carrying materials downstream. Within meltwater, dissolved carbon and suspended material are understudied in the High Arctic with respect to meltwater source. Meltwater samples will be taken from locations within the Wolf Creek Basin and the Expedition River Basin on Axel Heiberg Island, Nunavut, Canada (79° 24’ 55’’ N, 90° 42’ 35 W). Meltwater sources from Wolf Creek Basin are primarily derived from snowmelt and the small (<5 km²) Crown Glacier.

Stream samples were collected using amber High-Density Polyethylene (HDPE) sampling bottles, and stored frozen and returned to Queen’s University. Prior to analyses samples were thawed in a refrigerator over approximately 48 hours. After thawing, samples for total dissolved carbon and total dissolved nitrogen analyses were vacuum filtered in the laboratory using a glass filtration apparatus and precombusted 0.7 μm GF/F glass fibre filters. The samples were then stored refrigerated in amber glass EPA vials with no headspace. DOC concentrations were measured as non-purgeable organic carbon (NPOC), while total Carbon (TC) was measured by acidification with HCl, by high temperature combustion (720°C) with a Shimadzu TOC-L analyser. TDN concentrations were measured as nitrogen monoxide via thermal decomposition, using the total nitrogen module (TNM-L) in line with the TOC-L. Samples for ion analyses were vacuum filtered in the laboratory using 0.2 PVDF membrane and vacuum filtration apparatus. The samples were then stored refrigerated in HDPE scintillation vials with no headspace. Major anions (Cl-, Br-, NO2-, NO3-, SO42-, PO43-) and cations (Na+, K+, NH4+, Mg2+, Ca2+) were measured using an ICS-5000 Thermo Scientific liquid ion chromatography system.

Identifier
Source https://www.polardata.ca/pdcsearch/PDCSearchDOI.jsp?doi_id=13123
Metadata Access http://www.polardata.ca/oai/provider?verb=GetRecord&metadataPrefix=fgdc&identifier=13123_fgdc
Provenance
Creator Thomson, Laura; Koncewicz, Evan; Lafreniere, Melissa
Publisher Canadian Cryospheric Information Network
Contributor Polar Data Catalogue
Publication Year 2020
Rights Research programs, CCIN, or ArcticNet take no liability for the use or transmission of this data
OpenAccess true
Contact melissa.lafreniere(at)queensu.ca; pdc(at)uwaterloo.ca
Representation
Language English
Format Computer file
Discipline Biogeochemistry
Spatial Coverage (-90.000W, 79.000S, -90.000E, 79.000N)
Temporal Coverage Begin 2019-05-01T00:00:00Z
Temporal Coverage End 2020-08-29T00:00:00Z