Citation:

PANGAEA.993352 (dataset in review)

Name: Geochemical information for marine sediments in the Kanivaliuraq lagoon (Ptarmigan Bay) and Herschel Basin, western Canadian Arctic
License: https://creativecommons.org/licenses/by/4.0/
Keywords: Lagoon; permafrost carbon fluxes; Permafrost coasts

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Abstract:

These data sets compile geochemical and sedimentological information on terrestrial and marine sediments taken from the Yukon coastal plain (Canadian Arctic) and the Beaufort Sea (Arctic Ocean).

Terrestrial sediments were taken from active layer and permafrost compartments with a SIPRE corer, drill hammer, spade and probing cylinder between the coastline south-east of Qiqiktaruk – Herschel Island and the adjacent Richardson Mountains. Lagoon surface sediments and short cores were taken with a Van-Veen grab sampler and a percussion corer from Kanivaliuraq – Ptarmigan Bay lagoon. Marine sediments were taken with a gravity corer along transects from the lagoon towards the open ocean (Herschel Basin). All sediments were taken during a spring field campaign in 2016 (April/May) and two summer field campaigns in 2018 and 2019 (July/August).

The sediments were analysed for total carbon (TC), total organic carbon (TOC), total nitrogen (TN), OC loading as well as stable carbon and nitrogen isotopes (δ13C-TOC and δ15N-TN, respectively) to characterize organic matter (OM) composition. Grain size distribution and surface area of particles was determined to describe the sedimentological characteristics of the sediments. OC loading was estimated using TOC content and surface area of particles.Furthermore, bulk density, bulk mineralogy, and radioisotopes (total and excess 210Pb, total 137Cs) were measured on lagoon and marine short cores. Mass accumulation and sediment accumulation rates (MAR and SAR, respectively) were calculated. Bulk mineralogy included smectite, chlorite, kaolinite, illite, amphibole, quartz, albite, microcline, calcite, dolomite, pyroxene, pyrite and halite.

The aim of the study was to determine transport pathways and biogeochemical cycling of OM at the land-ocean-interface of permafrost coasts. A better understanding of these processes is needed to better constrain the impact of climate warming on carbon pathways along degrading coastlines in the Arctic and the role of lagoon environments and embayments for carbon dynamics. The data sets summarise metadata and geochemical information for terrestrial sediments (Data set 1), lagoon sediments (Data set 2) and marine sediments (Data set 3). Radioisotopic measurements, MAR and SAR are summarized in Data set 4 (lagoon short core) and Data set 5 (marine short core).

Keyword(s):

Lagoon; permafrost carbon fluxes; Permafrost coasts

Related to:

Tanski, George; et al. (in prep.): Arctic reactors: Lateral and vertical organic matter dynamics in coastal permafrost lagoons of the western Canadian Arctic.

Coverage:

Median Latitude: 69.519639 * Median Longitude: -138.937404 * South-bound Latitude: 69.491400 * West-bound Longitude: -138.969550 * North-bound Latitude: 69.546040 * East-bound Longitude: -138.895030

Date/Time Start: 2016-04-17T00:00:00 * Date/Time End: 2018-08-10T00:00:00

Minimum Elevation: -50.3 m * Maximum Elevation: -15.1 m

Event(s):

PG2302-1 (Lc2) * Latitude: 69.546040 * Longitude: -138.920730 * Date/Time: 2016-04-17T00:00:00 * Elevation: -28.6 m * Recovery: 0.295 m * Location: Herschel Basin * Campaign: (Yukon_Coast_2016_spring) * Basis: AWI Arctic Land Expedition * Method/Device: Gravity corer (GC) * Comment: Ice thickness: 1.7 m; Snow thickness: ca. 30 - 100 cm

PG2303-7 (Lc1) * Latitude: 69.513060 * Longitude: -138.895030 * Date/Time: 2016-04-22T00:00:00 * Elevation: -38.3 m * Recovery: 0.18 m * Location: Herschel Basin * Campaign: (Yukon_Coast_2016_spring) * Basis: AWI Arctic Land Expedition * Method/Device: Gravity corer (GC)

PG2307-1 (Lc5) * Latitude: 69.492630 * Longitude: -138.953090 * Date/Time: 2016-04-28T00:00:00 * Elevation: -23.7 m * Recovery: 0.24 m * Location: Herschel Basin * Campaign: (Yukon_Coast_2016_spring) * Basis: AWI Arctic Land Expedition * Method/Device: Gravity corer (GC) * Comment: Ice thickness: 1.55 m; Snow thickness: ca. 10 - 50 cm

Parameter(s):

#	Name	Short Name	Unit	Principal Investigator	Comment
1	Event label	Event		Tanski, George
2	Sample code/label	Sample label		Tanski, George
3	Campaign	Campaign		Tanski, George
4	Area/locality	Area		Tanski, George
5	Sample material	Samp mat		Tanski, George
6	DEPTH, soil	Depth soil	m	Tanski, George	Geocode – top
7	DEPTH, soil	Depth soil	m	Tanski, George	Geocode – bottom
8	Gear	Gear		Tanski, George	Device
9	DATE/TIME	Date/Time		Tanski, George	Geocode
10	Site	Site		Tanski, George	Sampling site
11	Comment	Comment		Tanski, George
12	LATITUDE	Latitude		Tanski, George	Geocode
13	LONGITUDE	Longitude		Tanski, George	Geocode
14	ELEVATION	Elevation	m a.s.l.	Tanski, George	Geocode
15	Carbon, organic, total	TOC	%	Tanski, George	wt%
16	Carbon, total	TC	%	Tanski, George	wt%
17	Nitrogen, total	TN	%	Tanski, George	wt%
18	δ13C, total organic carbon	δ13C TOC	‰ PDB	Tanski, George
19	δ15N, total nitrogen	δ15N TN	‰ air	Tanski, George
20	Surface area	Surface	m²	Tanski, George	mineral

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:

2002 data points

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