GLORIA

GEOMAR Library Ocean Research Information Access

X
feed icon rss

Your email was sent successfully. Check your inbox.

An error occurred while sending the email. Please try again.

Proceed reservation?

Export
Filter
Document type
Keywords
Publisher
Years
  • 1
    facet.materialart.
    Unknown
    Marine Sediment data along the Yukon Coastal Plain, Canada (2019)
    PANGAEA
    Details
    Publication Date: 2023-01-13
    Description: Narrowing uncertainties about carbon cycling is important in the Arctic where rapid environmental changes contribute to enhanced mobilization of carbon. Here we quantify soil organic carbon (SOC) contents of permafrost soils along the Yukon Coastal Plain and determine the annual fluxes from erosion. Different terrain units are assessed based on surficial geology, morphology, and ground ice conditions. To account for the volume of wedge ice and massive ice in a unit, sample SOC contents are reduced by 19% and sediment contents by 16%. The SOC content in a 1 m**2 column of soil varies according to the height of the bluff, ranging from 30 to 662 kg, with a mean value of 183 kg. Forty-four per cent of the SOC is within the top 1 m of soil and values vary based on surficial materials, ranging from 30 to 53 kg C/m**3, with a mean of 41 kg. Eighty per cent of the shoreline is erosive with a mean annual rate of change is 0.7 m/a. This results in a SOC flux per meter of shoreline of 131 kg C/m/a, and a total flux for the entire Yukon coast of 35.5 10**6 kg C/a (0.036 Tg C/a). The mean flux of sediment per meter of shoreline is 5.3 10**3 kg/m/a, with a total flux of 1,832.0 10**6 kg/a (1.832 Tg/a). Sedimentation rates indicate that approximately 13% of the eroded carbon is sequestered in nearshore sediments, where the overwhelming majority of organic carbon is of terrestrial origin.
    Keywords: Box corer/grab; Carbon, organic, terrestrial matter; Carbon, organic, total; Carbon/Nitrogen ratio; DEPTH, water; Distance; Event label; Herschel_North_HN-1; Herschel_North_HN-3; Herschel_North_HN-5; Herschel_West_HW-1; King_Point-3; King_Point-4; Latitude of event; Longitude of event; Nitrogen, total; Nunaluk_Inside_NI-2; Nunaluk_Inside_NI-4; Nunaluk_Inside_NI-5; Push_Ridge-1; Push_Ridge-5; Sample ID; Shingle_Point-1; Shingle_Point-3; Shingle_Point-5; Site; Stokes-3; Thetis_Bay_TB-1; Thetis_Bay_TB-5; Whale_Bay_WB-5; Workboat_North_WN-3; Workboat_North_WN-5; Workboat_South_WS-3; Workboat_South_WS-5; Yukon, Canada, North America; δ13C, organic carbon
    Type: Dataset
    Format: text/tab-separated-values, 176 data points
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
    DATA PANGAEA
  • 2
    facet.materialart.
    Unknown
    Quantification of shoreline movements along the Yukon Territory mainland coast between 1951 and 2011 (2017)
    PANGAEA
    In:  Supplement to: Irrgang, Anna Maria; Lantuit, Hugues; Manson, Gavin K; Günther, Frank; Grosse, Guido; Overduin, Pier Paul (2018): Variability in rates of coastal change along the Yukon Coast, 1951 to 2015. Journal of Geophysical Research-Earth Surface, 123(4), 779-800, https://doi.org/10.1002/2017JF004326
    Details
    Publication Date: 2023-01-13
    Description: The Arctic is warming, but the impacts on its coasts are not well documented. To better understand the reaction of Arctic coasts to increasing environmental pressure, shoreline position changes along a 210 km length of the Yukon Territory mainland coast in north-west Canada were investigated for the time period from 1951 to 2011. Shoreline positions were extracted from georeferenced aerial photographs from 1951, 1953, 1954, 1972, 1976, 1992, 1994, and 1996, and from WorldView and GeoEye satellite imagery from 2011. Shoreline change was then analyzed using the Digital Shoreline Analysis System (DSAS) extension for ESRI ArcGIS. Shoreline change rates decelerated to a mean rate of -0.5 m/a between the 1970s to 1990s, which was followed by a significant increase in coastal erosion to -1.3 m/a in the 1990s to 2011 time period. These observation indicate that the current rate of coastal retreat along the Yukon coast is higher than at any time before in the 60 year long observation record.
    Keywords: ACD; Arctic Coastal Dynamics; Classification; Digital Shoreline Analysis System extension for ESRI ArcGIS, Thieler et al, 2009; Digitized shoreline indicator; LATITUDE; LONGITUDE; Net shoreline movement; Rates of positional changes; SAT; Satellite derived; Satellite remote sensing; Transect; UTM Easting, Universal Transverse Mercator; UTM Northing, Universal Transverse Mercator; UTM Zone, Universal Transverse Mercator; Yukon_Territory_mainland_coast; Yukon, Canada, North America
    Type: Dataset
    Format: text/tab-separated-values, 43963 data points
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
    DATA PANGAEA
  • 3
    facet.materialart.
    Unknown
    Current velocity measurements from upward-looking ADCP at Qikiqtaruk during the Yukon Coast 2018 expedition of the AWI (2021)
    PANGAEA
    In:  Alfred Wegener Institute - Research Unit Potsdam
    Details
    Publication Date: 2024-01-08
    Description: The dataset compiles water current velocities and direction measured by a platform-based upward looking Acoustic Doppler Current Profiler. Data was acquired in August 2018 during the Yukon Coast 2018 expedition to the Herschel Island – Qikiqtaruk coastal observatory, conducted by the Alfred Wegener Institute in Potsdam, Germany. Goal of this project was to find drivers that control nearshore currents and to map their spatio-temporal variation. These currents might play an important role in the transport process of sediments and organic matter in the nearshore zone of the Arctic Ocean. The sediments mainly originate from the rapidly eroding permafrost coasts. The columns of this data file include Date/Time, height above the seafloor of the respective measurement cell (bin), current velocity in east-west direction and current velocity in north-south direction.
    Keywords: Acoustic Current Doppler Profiler; Acoustic Doppler Current Profiling (ADCP); Acoustic Doppler Current Profiling (ADCP), RDI Workhorse Sentinel, 600 kHz; ADCP; ADCP data; Arctic Ocean; Arctic Shelf; AWI_Perma; AWI Arctic Land Expedition; Beaufort Sea; CA-Land_2018_YukonCoast; Coastal erosion; Current Direction; currents; current velocity; Current velocity, east-west; Current velocity, north-south; Date/Time local; Height above sea floor/altitude; Herschel Island; hydrodynamics; Nearshore zone; NUNATARYUK; NUNATARYUK, Permafrost thaw and the changing Arctic coast, science for socioeconomic adaptation; Permafrost; Permafrost Research; Qikiqtaruk; YC_2018_ADCP; Yukon_Coast_2018; Yukon Coast
    Type: Dataset
    Format: text/tab-separated-values, 923306 data points
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
    DATA PANGAEA
  • 4
    facet.materialart.
    Unknown
    Current velocity measurements from upward-looking ADCP at Qikiqtaruk during the Yukon Coast 2015 expedition of the AWI (2021)
    PANGAEA
    In:  Alfred Wegener Institute - Research Unit Potsdam
    Details
    Publication Date: 2024-01-08
    Description: The dataset compiles water current velocities and direction measured by a platform-based upward looking Acoustic Doppler Current Profiler. Data was acquired in July/August 2015 during the Yukon Coast 2015 expedition to the Herschel Island – Qikiqtaruk coastal observatory, conducted by the Alfred Wegener Institute in Potsdam, Germany. Goal of this project was to find drivers that control nearshore currents and to map their spatio-temporal variation. These currents might play an important role in the transport process of sediments and organic matter in the nearshore zone of the Arctic Ocean. The sediments mainly originate from the rapidly eroding permafrost coasts. The columns of this data file include Date/Time, height above the seafloor of the respective measurement cell (bin), current velocity in east-west direction and current velocity in north-south direction.
    Keywords: Acoustic Current Doppler Profiler; Acoustic Doppler Current Profiling (ADCP); Acoustic Doppler Current Profiling (ADCP), RDI Workhorse Sentinel, 600 kHz; ADCP; ADCP data; Arctic Ocean; Arctic Shelf; AWI_Perma; AWI Arctic Land Expedition; Beaufort Sea; CA-Land_2015_YukonCoast; Coastal erosion; currents; current velocity; Current velocity, east-west; Current velocity, north-south; Date/Time local; Height above sea floor/altitude; Herschel Island; hydrodynamics; Nearshore zone; Permafrost; Permafrost Research; Qikiqtaruk; YC_2015_ADCP; Yukon_Coast_2015; Yukon Coast
    Type: Dataset
    Format: text/tab-separated-values, 150784 data points
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
    DATA PANGAEA
  • 5
    facet.materialart.
    Unknown
    Sedimentological and biogeochemical data on samples from undisturbed, disturbed and marine sediments from Qikiqtaruk (Herschel Island, Yukon Coast, Canada) taken in summer 2014 (2017)
    PANGAEA
    In:  Alfred Wegener Institute - Research Unit Potsdam
    Details
    Publication Date: 2024-03-22
    Keywords: Active layer depth; Ammonium; AWI_PerDyn; Carbon, organic, dissolved; Carbon, organic, dissolved/Nitrogen, total, dissolved ratio; Carbon, organic, total; Carbon, organic, total/Nitrogen, total ratio; Comment; DATE/TIME; Density, dry bulk; DEPTH, sediment/rock; Herschel Island, Yukon Territory, Canada; Ice content; LATITUDE; LONGITUDE; MULT; Multiple investigations; Nitrate; Nitrite; Nitrogen, inorganic, dissolved; Nitrogen, total; Nitrogen, total dissolved; Permafrost Research (Periglacial Dynamics) @ AWI; Qikiqtaruk; Sample ID; Sample mass; Sample volume; Subzone; Zone; δ13C, dissolved organic carbon; δ13C, organic carbon
    Type: Dataset
    Format: text/tab-separated-values, 2514 data points
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
    DATA PANGAEA
  • 6
    facet.materialart.
    Unknown
    Soil organic carbon (SOC) and sediment contents and fluxes for terrain units along the Yukon Coastal Plain, Canada, including corrections for volumetric ground ice contents (2018)
    PANGAEA
    In:  Supplement to: Couture, Nicole; Irrgang, Anna Maria; Pollard, Wayne H; Lantuit, Hugues; Fritz, Michael (2018): Coastal Erosion of Permafrost Soils Along the Yukon Coastal Plain and Fluxes of Organic Carbon to the Canadian Beaufort Sea. Journal of Geophysical Research: Biogeosciences, https://doi.org/10.1002/2017JG004166
    Details
    Publication Date: 2024-05-07
    Description: Narrowing uncertainties about carbon cycling is important in the Arctic where rapid environmental changes contribute to enhanced mobilization of carbon. Here we quantify soil organic carbon (SOC) contents of permafrost soils along the Yukon Coastal Plain and determine the annual fluxes from erosion. Different terrain units are assessed based on surficial geology, morphology, and ground ice conditions. To account for the volume of wedge ice and massive ice in a unit, sample SOC contents are reduced by 19% and sediment contents by 16%. The SOC content in a 1 m**2 column of soil varies according to the height of the bluff, ranging from 30 to 662 kg, with a mean value of 183 kg. Forty-four per cent of the SOC is within the top 1 m of soil and values vary based on surficial materials, ranging from 30 to 53 kg C/m**3, with a mean of 41 kg. Eighty per cent of the shoreline is erosive with a mean annual rate of change is 0.7 m/a. This results in a SOC flux per meter of shoreline of 131 kg C/m/a, and a total flux for the entire Yukon coast of 35.5 10**6 kg C/a (0.036 Tg C/a). The mean flux of sediment per meter of shoreline is 5.3 10**3 kg/m/a, with a total flux of 1,832.0 10**6 kg/a (1.832 Tg/a). Sedimentation rates indicate that approximately 13% of the eroded carbon is sequestered in nearshore sediments, where the overwhelming majority of organic carbon is of terrestrial origin.
    Keywords: Area, eroded; Carbon, organic, total; Carbon and nitrogen and sulfur (CNS) isotope element analyzer, Elementar, Vario EL III; Change rate; Corrected; Density, dry bulk; Density, mass density; Depth, soil, maximum; Depth, soil, minimum; Ice content; LATITUDE; Layer thickness; Lithology/composition/facies; Location; LONGITUDE; Mass, flux; Mass per unit area; Reference/source; Sample ID; Yukon_Coastal_Soils; Yukon, Canada, North America
    Type: Dataset
    Format: text/tab-separated-values, 12409 data points
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
    DATA PANGAEA
  • 7
    facet.materialart.
    Unknown
    Where and Why Do Retrogressive Thaw Slumps Occur? (2016)
    In:  EPIC3ArcticNet, 2016-12-05-2016-12-09
    Details
    Publication Date: 2017-01-26
    Description: Retrogressive thaw slumps (RTSs) are among the most active landforms in the Arctic; their number has increased tremendously over the past decades. While processes initiating discrete RTSs are well defined, little research has been done on a regional scale to reveal the major terrain controls on their development. Our research provides new insights into the dynamics of coastal RTSs. We reveal the main geomorphic factors determining the development of RTSs along a 238 km coastal segment of the Yukon Coastal Plain, Canada. We 1) show the current extent of RTSs, 2) ascertain the factors controlling their activity and initiation, and 3) explain the differences in density and coverage of RTSs. We mapped and classified the RTSs based on high-resolution satellite images acquired in 2011. We derived the terrain characteristics for each RTS and highlighted the main terrain controls over their development using univariate regression trees. We tested the response variables (RTSs activity, initiation, density and coverage) against 16 environmental variables. We detected 287 coastal RTSs in the study area. Both the activity and the initiation of the RTSs were influenced by coastal geomorphology: active RTSs and new RTSs occurred primarily on terrain with slope angles greater than 3.9° and 5.9°, respectively. The density and coverage of RTSs within each coastal segment were constrained by the volume and thickness of massive ice bodies. Coastal erosion appears to have only an indirect effect on the development of RTSs by maintaining the best conditions for RTSs to reactivate.
    Repository Name: EPIC Alfred Wegener Institut
    Type: Conference , notRev
    Format: application/pdf
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
    PAPER (OA)
  • 8
    facet.materialart.
    Unknown
    Contribution of Coastal Retrogressive Thaw Slumps to the Nearshore Organic Carbon budget along the Yukon Coast (2017)
    EGU
    In:  EPIC3Biogeosciences Discuss., EGU, ISSN: 1810-6277
    Details
    Publication Date: 2017-11-09
    Description: We describe the evolution of coastal retrogressive thaw slumps (RTSs) between 1952 and 2011 along the Yukon Coast, Canada, and provide the first estimate of the contribution of RTSs to the nearshore organic carbon budget in this area. We 1) monitor the evolution of RTSs during the periods 1952-1972 and 1972-2011; 2) calculate the volume of material eroded and stocks of organic carbon (OC) mobilized through slumping – including soil organic carbon (SOC) and dissolved organic carbon (DOC) – and 3) measure the OC fluxes mobilized through slumping between 1972 and 2011. We identified RTSs using high-resolution satellite imagery from 2011 and geocoded aerial photographs from 1952 and 1972. To estimate the volume of eroded material, we applied a spline interpolation on an airborne LiDAR dataset acquired in July 2013. We inferred the stocks of mobilized SOC and DOC from existing related literature. Our results show a 73% increase in the number of RTSs between 1952 and 2011. In the study area, RTSs displaced at least 8600*103 m^3 of material, with 53% of ice. We estimated that slumping mobilized 81900*10^3 kg of SOC and 156*10^3 kg of DOC. Since 1972, 17% of the RTSs have displaced 8.6*103 m^3/yr of material, with an average OC flux of 82.5*10^3 kg/yr. This flux represents 0.3% of the OC flux released from coastal retreat; however RTSs have a strong impact on the transformation of OC in the coastal fringe.
    Repository Name: EPIC Alfred Wegener Institut
    Type: Article , notRev
    Format: application/pdf
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
    PAPER (OA)
  • 9
    facet.materialart.
    Unknown
    Terrain controls on the occurrence of coastal retrogressive thaw slumps along the Yukon Coast, Canada (2017)
    Wiley
    In:  EPIC3Journal of Geophysical Research-Earth Surface, Wiley, 122, pp. 1619-1634, ISSN: 0148-0227
    Details
    Publication Date: 2018-08-30
    Description: Retrogressive thaw slumps (RTSs) are among the most active landforms in the Arctic; their number has increased significantly over the past decades. While processes initiating discrete RTSs are well identified, the major terrain controls on the development of coastal RTSs at a regional scale are not yet defined. Our research reveals the main geomorphic factors that determine the development of RTSs along a 238 km segment of the Yukon Coast, Canada. We (1) show the current extent of RTSs, (2) ascertain the factors controlling their activity and initiation, and (3) explain the spatial differences in the density and areal coverage of RTSs. We mapped and classified 287 RTSs using high-resolution satellite images acquired in 2011. We highlighted the main terrain controls over their development using univariate regression trees model. Coastal geomorphology influenced both the activity and initiation of RTSs: active RTSs and RTSs initiated after 1972 occurred primarily on terrains with slope angles greater than 3.9° and 5.9°, respectively. The density and areal coverage of RTSs were constrained by the volume and thickness of massive ice bodies. Differences in rates of coastal change along the coast did not affect the model. We infer that rates of coastal change averaged over a 39 year period are unable to reflect the complex relationship between RTSs and coastline dynamics. We emphasize the need for large-scale studies of RTSs to evaluate their impact on the ecosystem and to measure their contribution to the global carbon budget.
    Repository Name: EPIC Alfred Wegener Institut
    Type: Article , isiRev
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
    PAPER (OA)
  • 10
    facet.materialart.
    Unknown
    Present and future impacts of coastal dynamics on the human environment of the Yukon coast (2017)
    In:  EPIC3Arctic Change, Quebec City, 2017-12-11-2017-12-15
    Details
    Publication Date: 2019-09-01
    Repository Name: EPIC Alfred Wegener Institut
    Type: Conference , notRev
    Format: application/pdf
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
    PAPER (OA)
Close ⊗
This website uses cookies and the analysis tool Matomo. More information can be found here...