Serbu, Jessica; Tank, Suzanne; Peucker-Ehrenbrink, Bernhard; St.Louis, Vincent: Weathering dataset collected from climate-threatened glacial river headwaters on the eastern slopes of the Canadian Rocky Mountains (2019-2021) [dataset]. PANGAEA, https://doi.pangaea.de/10.1594/PANGAEA.972842 (dataset in review)
Abstract:
Here we provide a biogeochemical dataset containing weathering-specific parameters that we collected between 2019-2021 from the headwaters of three rivers (Sunwapta-Athabasca, North Saskatchewan, and Bow) which originate from the glacierized eastern slopes of the Canadian Rocky Mountains. Geochemical weathering can be extremely pronounced in glacierized watersheds due to large quantities of fresh glacial flour, which in turn can impact both local and global carbon budgets depending on the type of weathering that occurs. However, despite glaciers serving as hotspots of geochemical weathering globally, we still know little about how the type and magnitude of various geochemical weathering reactions change downriver of glaciers, and how this effect may change seasonally or interannually. Our dataset begins to address this.
River sampling sites were visited monthly in 2019 and 2020 during the open water season (OWS), beginning during snowmelt in late May/early June, through peak glacial melt in July/August, then during the receding flow period in September/October. Additional samples were collected twice in winter (December 2019, January 2021) during base flow, but only at sites where it was safe to do so. In general, at each river sampling site and time, atmospheric CO2(g) and dissolved in situ riverine CO2(aq) concentrations were directly measured with a Vaisala CARBOCAP® GM70 Hand-Held CO2 Meter fitted with a 0 - 2000 ppm GMP222 CO2 probe sealed in a tight Teflon sleeve. Using clean field sampling protocols, we also collected samples for the analyses of δ13C-dissolved inorganic carbon (DIC) and Δ14C-DIC; δ13C-particulate inorganic carbon (PIC); sulfate isotopes (δ34S-SO4, δ18O-SO4), and radiogenic strontium (87Sr/86Sr).
Keyword(s):
Funding:
Alberta Conservation Association, grant/award no. 030-00-90-140/1016: Impacts of rapid glacial melt on downstream river freshwater quality and food webs in Banff and Jasper National Parks
Government of Canada, grant/award no. 29000-RES0046243: From the Mountains to Our Tables: Freshwater Security in Three Canadian Eastern Rocky Mountain Watersheds
Natural Sciences and Engineering Research Council (NSERC), grant/award no. RGPIN-2019-04272: The impacts of rapidly receding glaciers on proglacial freshwater resources and ecological services
Coverage:
Median Latitude: 52.140886 * Median Longitude: -122.155132 * South-bound Latitude: 51.284950 * West-bound Longitude: 116.463890 * North-bound Latitude: 52.916146 * East-bound Longitude: -115.983500
Date/Time Start: 2019-05-14T00:00:00 * Date/Time End: 2023-06-14T00:00:00
Minimum Elevation: 1060.0 m * Maximum Elevation: 2960.0 m
Event(s):
Canadian_Rocky_Mountains_BowLake * Latitude: 51.679280 * Longitude: 116.463890 * Date/Time: 2023-06-14T00:00:00 * Elevation: 1951.0 m * Location: Rocky Mountains, Canada * Method/Device: Sampling river (RIVER)
Parameter(s):
| # | Name | Short Name | Unit | Principal Investigator | Method/Device | Comment |
|---|---|---|---|---|---|---|
| 1 | Event label | Event | Serbu, Jessica | |||
| 2 | Latitude of event | Latitude | Serbu, Jessica | |||
| 3 | Longitude of event | Longitude | Serbu, Jessica | |||
| 4 | Date/Time of event | Date/Time | Serbu, Jessica | |||
| 5 | Elevation of event | Elevation | m | Serbu, Jessica | ||
| 6 | Sample ID | Sample ID | Serbu, Jessica | |||
| 7 | Water Body | Water Body | Serbu, Jessica | |||
| 8 | Site | Site | Serbu, Jessica | Unique River-Number code of sample site | ||
| 9 | Watershed area | Watershed | km2 | Serbu, Jessica | Gross watershed area | |
| 10 | Distance to glacier | Distance glacier | km | Serbu, Jessica | Distance to source glacier termini as the river flows (approximated) | |
| 11 | Season | Season | Serbu, Jessica | |||
| 12 | Sample material | Samp mat | Serbu, Jessica | |||
| 13 | δ34S, sulfate | δ34S [SO4]2- | ‰ CDT | Serbu, Jessica | Filtered [0.45µm cellulose acetate filter] | Mean (VCDT) |
| 14 | δ18O, sulfate | δ18O [SO4]2- | ‰ SMOW | Serbu, Jessica | Filtered [0.45µm cellulose acetate filter] | Mean (VSMOW) |
| 15 | Strontium-87/Strontium-86 ratio | 87Sr/86Sr | Serbu, Jessica | Filtered [0.45µm cellulose acetate filter] | ||
| 16 | δ13C, particulate inorganic carbon | δ13C PIC | ‰ | Serbu, Jessica | Captured [0.7µm GF/F filter] | Mean (VPDB) |
| 17 | δ13C, dissolved inorganic carbon | δ13C DIC | ‰ PDB | Serbu, Jessica | Filtered [0.45µm cellulose acetate filter] | Mean (#0 = <DL) |
| 18 | Age, dated | Age dated | ka BP | Serbu, Jessica | Calculated | Age of measured dissolved carbon in years before present (BP = 1950 AD) |
| 19 | Carbon-14, modern, dissolved inorganic carbon | pMC DIC | % | Serbu, Jessica | Filtered [0.7µm GF/F filter] | |
| 20 | ΔΔ14C | ΔΔ14C | ‰ | Serbu, Jessica | Filtered [0.7µm GF/F filter] | Per mil depletion or enrichment relative to standard normalized for isotope fractionation |
| 21 | δ14C, dissolved inorganic carbon | δ14C DIC | ‰ | Serbu, Jessica | Filtered [0.7µm GF/F filter] | The absolute amount of dissolved 14C in the sample the year it was measured |
| 22 | Carbon dioxide content | CO2 | µmol | Serbu, Jessica | Calculated | In situ aqueous carbon dioxide (µmol) as calculated from measured CO2 (g ppm) |
| 23 | Carbon dioxide content | CO2 | µmol | Serbu, Jessica | Calculated | Atmospheric equilibrium of gaseous carbon dioxide (µmol) |
| 24 | Carbon dioxide saturation | CO2 sat | % | Serbu, Jessica | Calculated | Mean in situ dissolved carbon dioxide (% saturation) as calculated from Vaisala CO2 meter data and corrected to 100% saturation |
License:
Creative Commons Attribution 4.0 International (CC-BY-4.0) (License comes into effect after moratorium ends)
Status:
Curation Level: Enhanced curation (CurationLevelC)
Size:
2389 data points
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