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  • 1
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    Erosion and Flooding—Threats to Coastal Infrastructure in the Arctic: A Case Study from Herschel Island, Yukon Territory, Canada (2015)
    Springer
    Details
    Publication Date: 2015-11-12
    Print ISSN: 1559-2723
    Electronic ISSN: 1559-2731
    Topics: Geography
    Published by Springer
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  • 2
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    Erratum to: Erosion and Flooding - Threats to Coastal Infrastructure in the Arctic: A Case Study from Herschel Island, Yukon Territory, Canada (2016)
    Springer
    Details
    Publication Date: 2016-05-24
    Print ISSN: 1559-2723
    Electronic ISSN: 1559-2731
    Topics: Geography
    Published by Springer
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  • 3
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    The Permafrost Young Researchers Network (PYRN) is getting older: The past, present, and future of our evolving community (2019)
    Cambridge University Press
    Details
    Publication Date: 2019-02-07
    Description: A lasting legacy of the International Polar Year (IPY) 2007–2008 was the promotion of the Permafrost Young Researchers Network (PYRN), initially an IPY outreach and education activity by the International Permafrost Association (IPA). With the momentum of IPY, PYRN developed into a thriving network that still connects young permafrost scientists, engineers, and researchers from other disciplines. This research note summarises (1) PYRN’s development since 2005 and the IPY’s role, (2) the first 2015 PYRN census and survey results, and (3) PYRN’s future plans to improve international and interdisciplinary exchange between young researchers. The review concludes that PYRN is an established network within the polar research community that has continually developed since 2005. PYRN’s successful activities were largely fostered by IPY. With 〉200 of the 1200 registered members active and engaged, PYRN is capitalising on the availability of social media tools and rising to meet environmental challenges while maintaining its role as a successful network honouring the legacy of IPY.
    Print ISSN: 0032-2474
    Electronic ISSN: 1475-3057
    Topics: Ethnic Sciences , Geography
    Published by Cambridge University Press
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  • 4
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    Transformation of terrestrial organic matter along thermokarst-affected permafrost coasts in the Arctic (2017)
    Elsevier
    Details
    Publication Date: 2017-03-01
    Print ISSN: 0048-9697
    Electronic ISSN: 1879-1026
    Topics: Energy, Environment Protection, Nuclear Power Engineering
    Published by Elsevier
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  • 5
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    Rapid retreat of permafrost coastline observed with aerial drone photogrammetry (2019)
    Copernicus
    Details
    Publication Date: 2019-05-27
    Description: Permafrost landscapes are changing around the Arctic in response to climate warming, with coastal erosion being one of the most prominent and hazardous features. Using drone platforms, satellite images, and historic aerial photographs, we observed the rapid retreat of a permafrost coastline on Qikiqtaruk – Herschel Island, Yukon Territory, in the Canadian Beaufort Sea. This coastline is adjacent to a gravel spit accommodating several culturally significant sites and is the logistical base for the Qikiqtaruk – Herschel Island Territorial Park operations. In this study we sought to (i) assess short-term coastal erosion dynamics over fine temporal resolution, (ii) evaluate short-term shoreline change in the context of long-term observations, and (iii) demonstrate the potential of low-cost lightweight unmanned aerial vehicles (“drones”) to inform coastline studies and management decisions. We resurveyed a 500 m permafrost coastal reach at high temporal frequency (seven surveys over 40 d in 2017). Intra-seasonal shoreline changes were related to meteorological and oceanographic variables to understand controls on intra-seasonal erosion patterns. To put our short-term observations into historical context, we combined our analysis of shoreline positions in 2016 and 2017 with historical observations from 1952, 1970, 2000, and 2011. In just the summer of 2017, we observed coastal retreat of 14.5 m, more than 6 times faster than the long-term average rate of 2.2±0.1 m a−1 (1952–2017). Coastline retreat rates exceeded 1.0±0.1 m d−1 over a single 4 d period. Over 40 d, we estimated removal of ca. 0.96 m3 m−1 d−1. These findings highlight the episodic nature of shoreline change and the important role of storm events, which are poorly understood along permafrost coastlines. We found drone surveys combined with image-based modelling yield fine spatial resolution and accurately geolocated observations that are highly suitable to observe intra-seasonal erosion dynamics in rapidly changing Arctic landscapes.
    Print ISSN: 1994-0416
    Electronic ISSN: 1994-0424
    Topics: Geography , Geosciences
    Published by Copernicus on behalf of European Geosciences Union.
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  • 6
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    Rapid retreat of permafrost coastline observed with aerial drone photogrammetry (2018)
    Copernicus
    Details
    Publication Date: 2018-12-12
    Description: Permafrost landscapes are changing around the Arctic in response to climate warming, with coastal erosion being one of the most prominent and hazardous features. Using drone platforms, satellite images and historic aerial photos, we observed the rapid retreat of a permafrost coastline on Qikiqtaruk–Herschel Island, Yukon Territory, in the Canadian Beaufort Sea. Erosion of this coast increasingly threatens the settlement located on the Kuvluraq–Simpson Point gravel spit. This spit accommodates several culturally significant sites and is the logistical base for the Qikiqtaruk–Herschel Island Territorial Park operations. The objectives of this study were to demonstrate the effective use of low-cost lightweight drones for: (i) assessing short-term coastal erosion dynamics over fine temporal resolution, (ii) evaluating short-term change detection in the context of long-term observations of shoreline change, and (iii) demonstrating the potential of these measurement tools for park management and decision makers. Using drones, we resurveyed a 500 m permafrost coastal reach at high temporal frequency (seven surveys over 40 days in 2017). The observed intra-seasonal shoreline changes were related to meteorological and oceanographic variables to understand intra-seasonal erosion dynamics. To put our short-term observations into historical context, we integrated analysis of shoreline positions in 2016 and 2017 with historical observations from 1952, 1970, 2000, and 2011. We found drone surveys analysed with image-based modelling yield fine-grain and accurately geolocated observations that are highly suitable to observe intra-seasonal erosion dynamics. In 2017, we observed coastal retreat of 14.5 m a−1, more than six times faster than the long-term average rate of 2.2 ± 0.2 m a−1 (1952–2017). Over a single 4 day period, coastline retreat exceeded 1 ± 0.1 m d−1. Our findings highlight the episodic nature of shoreline change, which is poorly understood along permafrost coastlines. We conclude that the data available from drones is an effective tool to understand better the mechanistic short-term controls on coastal erosion dynamics and thus long-term coastline change, and has strong potential to support local management decisions regarding coastal settlements in rapidly changing Arctic landscapes.
    Print ISSN: 1994-0432
    Electronic ISSN: 1994-0440
    Topics: Geography , Geosciences
    Published by Copernicus on behalf of European Geosciences Union.
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  • 7
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    Application of portable free-fall penetrometer for geotechnical investigation of Arctic nearshore zone (2017)
    Canadian Science Publishing
    Details
    Publication Date: 2017-01-01
    Description: The Arctic is currently undergoing rapid changes with regard to sea ice extent permafrost thaw, and coastal erosion. In addition to hydrodynamic processes, the sediments in the Arctic nearshore zone are affected by freeze–thaw cycles, as well as an increase of abundant suspended sediment introduced by permafrost-induced mass movements, such as retrogressive thaw slumps, and increased river discharge. During the YUKON14 expedition to Herschel Island, Yukon, in situ geotechnical testing of nearshore zone sediments was conducted using a portable free-fall penetrometer. Approximately 200 sites were tested, and four different geotechnical signatures identified and grouped. Most locations were characterized by a soft sediment top layer that exhibited a noticeably lower sediment strength than the underlying sediment. In some cases, multiple layers of different sediment strength were detected in the upper meter of the seabed surface. The results were correlated to existing sediment grain size records and backscatter information from a phase measuring bathymetric sonar. Strong spatial variations in sediment type and stiffness were observed, as well as in abundance and thickness of a top layer of very soft and loose sediment. The geotechnical signatures were correlated to site-specific hydrodynamic conditions, morphology, and vicinity to thaw slumps.
    Print ISSN: 0008-3674
    Electronic ISSN: 1208-6010
    Topics: Geosciences
    Published by Canadian Science Publishing
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  • 8
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    Workboat Passage Bathymetry Isobaths (2018)
    PANGAEA
    In:  Alfred Wegener Institute - Research Unit Potsdam
    Details
    Publication Date: 2023-01-13
    Description: This dataset contains isobaths of Workboat Passage near Herschel Island, Yukon, Canada. The map is intended for display purposes only. It represents a compilation of three very different datasets. The majority of information stems from from a georeferenced scanned image of the insert pertaining to Workboat Passage included in Canadian Hydrographic Service map #7661 Demarcation Bay to Phillips Bay (1986). Soundings and isobaths were digitized. Single point sonar soundings obtained with the onboard GPS and sonar system (Garmin) in 2013 were added to the dataset. Lastly, a coastline was digitized based on a Geoeye satellite image at 1:1000 scale to provide the 0 m contour. The data (i.e. points and contours) were gridded at 40 m using the "topo to raster" tool in ArcMap. This dataset resulted from contouring the raster surface with 1m contours. No corrections for sea level elevation were carried out.
    Keywords: Herschel Island, Yukon Territory, Canada; WorkboatPassage
    Type: Dataset
    Format: application/zip, 78.7 kBytes
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  • 9
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    Granulometry and bulk geochemistry of nearshore sediments, Herschel Island, Yukon Territory, Canada (2016)
    PANGAEA
    In:  Alfred Wegener Institute - Research Unit Potsdam
    Details
    Publication Date: 2023-09-27
    Description: This dataset contains the results of granulometric and bulk geochemical analyses of Van Veen surface samples obtained by the Alfred Wegener Institute (AWI) in the course of the 2012 and 2013 summer field seasons. The sampling was performed along transects in depths generally 〈13 m, to a distance of about 〈5 km off Herschel Island. In 2012, 75 samples in Pauline Cove and in the vicinity of Simpson Point were obtained. Sample collection was expanded in 2013, on transects established the previous year, with additional locations in Tetris Bay and Workboat Passage. Samples consisted of approximately 100 g of the top 3-6 cm of sediment, and were frozen in the field and freeze dried at the AWI before undergoing analytical procedures. Sample locations were recorded with the onboard global positioning system (GPS) unit. Grain size distributions in our study were obtained using laser diffractometry at the AWI (Beckman Coulter LS200) on the 〈1 mm fraction of samples oxidized with 30% H2O2 until effervescence ceased to remove organics. Some samples were also sieved using a sieve stack with 1 phi intervals. GRADISTAT (Blott and Pye, 2001) was used to calculate graphical grain size statistics (Folk and Ward, 1957). Grain diameters were logarithmically transformed to phi values, calculated as phi=-log2d, where d is the grain diameter in millimeters (Blott and Pye, 2001; Krumbein, 1934). Freeze dried samples were ground and ground using an Elemetar Vario EL III carbon-nitrogen-sulphur analyzer at the AWI to measure total carbon (TC) and total nitrogen (TN). Tungsten oxide was added to the samples as a catalyst to the pyrolysis. Following this analysis, total organic carbon (TOC) was determined using an Elementar VarioMax. Stable carbon isotope ratios of 13C/12C of 118 samples were determined on a DELTAplusXL mass spectrometer (ThermoFisher Scientific, Bremen) at the German Research Centre for Geosciences (GFZ) in Potsdam, Germany . An additional analysis on 69 samples was carried out at the University of Hamburg with an isotope ratio mass spectrometer (Delta V, Thermo Scientific, Germany) coupled to an elemental analyzer (Flash 2000, Thermo Scientific, Germany). Prior to analysis, soil samples were treated with phosphoric acid (43%) to release inorganic carbon. Values are expressed relative to Vienna Peedee belemnite (VPDB) using external standards (USGS40, -26.4 per mil VPDB and IVA soil 33802153, -27.5 per mil VPDB).
    Keywords: Area/locality; AWI_PerDyn; Beckman Coulter Laser diffraction particle size analyzer LS 200; Carbon, organic, total; Carbon, total; Carbon and Nitrogen and sulfur (CNS) isotope element analyzer, Elementar, Elementar Vario MAX Cube; Carbon and nitrogen and sulfur (CNS) isotope element analyzer, Elementar, Vario EL III; Comment; Date/Time of event; DEPTH, sediment/rock; Description; Difference; Distance; Event label; Grain size, combined laser diffraction and sieve analyses; Grain size, mean; Grain size, sieving, sieve stack 1 phi interval (-3-〉4); Grain size description; Gravel; Herschel Island, Yukon Territory, Canada; Kurtosis; Kurtosis description; Latitude of event; Longitude of event; Mode, grain size; Nitrogen, total; PC1210001; PC1210002; PC1210003; PC1210004; PC121001; PC121002; PC121003; PC121004; PC122001; PC122002; PC122003; PC122004; PC122005; PC123001; PC123002; PC123003; PC123004; PC124001; PC124002; PC124003; PC124004; PC124005; PC125001; PC125002; PC125003; PC125004; PC125005; PC126001; PC126002; PC126003; PC127001; PC127002; PC127003; PC127004; PC127005; PC127006; PC128001; PC128002; PC128003; PC128004; PC128005; PC128006; PC129001; PC129002; PC129003; PC129004; Percentile 10; Percentile 50; Percentile 90; Permafrost Research (Periglacial Dynamics) @ AWI; Ratio; Sample type; Sand; Sediment type; Size fraction 〈 0.002 mm, clay; Size fraction 〈 0.063 mm, mud, silt+clay; Size fraction 0.004-0.002 mm, 8.0-9.0 phi, very fine silt; Size fraction 0.008-0.004 mm, 7.0-8.0 phi, fine silt; Size fraction 0.016-0.008 mm, 6.0-7.0 phi, medium silt; Size fraction 0.032-0.016 mm, 5.0-6.0 phi, coarse silt; Size fraction 0.063-0.032 mm, 4.0-5.0 phi, very coarse silt; Size fraction 0.125-0.063 mm, 3.0-4.0 phi, very fine sand; Size fraction 0.250-0.125 mm, 2.0-3.0 phi, fine sand; Size fraction 0.500-0.250 mm, 1.0-2.0 phi, medium sand; Size fraction 1.000-0.500 mm, 0.0-1.0 phi, coarse sand; Size fraction 16-8 mm, medium gravel; Size fraction 2.000-1.000 mm, (-1.0)-0.0 phi, very coarse sand; Size fraction 30-10 mm, coarse gravel, pebble; Size fraction 4.0-2.0 mm, very fine gravel, granule; Size fraction 64-32 mm, very coarse gravel, pebble; Size fraction 8.0-4.0 mm, fine gravel; Skewness; Skewness description; Sorting; Sorting description; Sulfur, total; TB121001; TB121002; TB121003; TB121004; TB122001; TB122002; TB122003; TB122004; TB122005; TB123001; TB123002; TB123003; TB123004; TB123005; TB124001; TB124002; TB124003; TB124004; TB124005; TB125001; TB125002; TB125003; TB125004; TB125005; TB126001; TB126002; TB126003; TB126004; TB126005; Texture; Transect; UTM Easting, Universal Transverse Mercator; UTM Northing, Universal Transverse Mercator; VA-01; VA-02; VA-03; van Veen Grab; VB-01; VB-02; VB-03; VB-03-2; VB-03-3; VC-01; VC-02; VC-03; VD-01; VD-02; VE-01; VE-02; VF-01; VF-02; VG-01; VG-02; VG-03; VG-04; VGRAB; VH-01; VH-02; VH-03; VH-04; VH-05; VH-06; VH-07; VI-01; VI-02; VI-03; VI-04; VI-04-2; VI-05; VI-06; VI-07; VI-08; VI-09; VI-10; VI-11; VI-11-1; VJ-02; VJ-03; VJ-04; VJ-05; VJ-06; VJ-07; VJ-07-2; VJ-08; VJ-10; VJ-11; VJ-12; VK-01; VK-02; VK-03; VK-04; VK-05; VK-06; VK-07; VK-07-2; VK-08; VK-08-2; VK-09; VK-10; VK-11; VK-12; VL-02; VL-03; VL-04; VL-05; VL-06; VL-07; VL-08; VL-09; VL-10; VM-01; VM-02; VM-03; VM-04; VM-05; VM-06; VM-07; VM-08; VM-09; VM-10; VM-11; VM-12; VM-13; VN-01; VN-02; VN-03; VN-04; VN-05; VN-06; VN-07; VN-08; VN-09; VN-10; VN-11; VN-12; VN-13; VN-14; VO-01; VO-02; VO-03; VO-04; VO-05; VO-06; VO-07; VO-08; VO-09; VO-10; VO-11; VO-12; VO-12-2; VO-13; VO-14; VP-01; VP-02; VP-03; VP-04; VP-05; VP-06; VP-07; VP-08; VP-09; VP-10; VP-11; VP-12; VP-13; VP-14; VQ-01; VQ-03; VQ-04; VR-01; VR-03; VR-05; VR-07; VS-02; VS-04; VS-06; VS-09; VT-01; VT-02; VT-04; VT-06; VT-08; VT-09; VU-06; VU-09; VU-10; VV-01; VV-05; VV-06; VV-08; VV-09; VW-01; VW-05; VW-06; VW-07; VW-08; VW-09; δ13C, organic carbon
    Type: Dataset
    Format: text/tab-separated-values, 24069 data points
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  • 10
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    Nearshore sub-bottom profiles at Herschel Island - Qikiqtaruk, Yukon, Canada (2019)
    PANGAEA
    Details
    Publication Date: 2024-01-08
    Description: Shallow reflective seismic surveys were carried out in the vicinity of Herschel Island in 2013. These data were collected to investigate the depositional dynamics to the west, north and east of the island. A portion of the Herschel Basin was also surveyed. The surveys were carried out in nearshore waters ca. 3-45 m deep and to about 5 km offshore, with a total line length of about 80 km. The data were recorded using an Innomar SES-2000 compact sub-bottom profiler. The primary frequency for this instrument is approximately 100 kHz. The secondary frequency was varied between 5 and 15 kHz. Gain was applied during acquisitition (24-50 dB) depending on conditions. Positional data was recorded using a Trimble R4 Global Positioning System (GPS) where the antenna was mounted directly over the transducer without offset. Survey speed was generally 〈5 knots. Data are provided as several SEG-Y files in a zip archive. The data were converted from the manufacturer's SES format using the proprietary SES Convert software. The 16 bit Integer SEG-Y files have little endian (PC) byte order. Navigational data was recorded in UTM Zone 7 N, in meters. Navigational data is also provided in tab separated files containing trace number, northing, easting and survey line ID. In addition, a zip file containing a shape file (polylines) is also provided.
    Keywords: HER; Herschel_Island; Herschel Basin; innomar; MULT; Multiple investigations; Seismic
    Type: Dataset
    Format: application/zip, 157.5 MBytes
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