Marine Sediment data along the Yukon Coastal Plain, Canada
Fuente:
PANGAEA
Salvato in:
| Autori principali: | , , , , |
|---|---|
| Natura: | Dataset Open Access |
| Lingua: | en |
| Pubblicazione: |
PANGAEA
2019
|
| Soggetti: | |
| Accesso online: | |
| Tags: |
Aggiungi Tag
Nessun Tag, puoi essere il primo ad aggiungerne!!
|
| _version_ | 1867171860503855104 |
|---|---|
| author | Couture, Nicole Irrgang, Anna Maria Pollard, Wayne H Lantuit, Hugues Fritz, Michael |
| author_facet | Couture, Nicole Irrgang, Anna Maria Pollard, Wayne H Lantuit, Hugues Fritz, Michael |
| collection | Datos científicos de ciencias marinas y ambientales |
| contents | 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. |
| format | Dataset Open Access |
| id | pangaea_https___doi_org_10_1594_PANGAEA_897273 |
| institution | PANGAEA |
| language | en |
| publishDate | 2019 |
| publisher | PANGAEA |
| record_format | pangaea |
| spellingShingle | Marine Sediment data along the Yukon Coastal Plain, Canada Couture, Nicole Irrgang, Anna Maria Pollard, Wayne H Lantuit, Hugues Fritz, Michael 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 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. |
| title | Marine Sediment data along the Yukon Coastal Plain, Canada |
| topic | 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 |
| url | https://doi.org/10.1594/PANGAEA.897273 |