Dissolved organic carbon (DOC) in Arctic ground ice, from northwest Canada, east Siberia, and Alaska
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| Format: | Dataset Open Access |
| Langue: | en |
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2015
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| _version_ | 1867168167119290368 |
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| author | Fritz, Michael Opel, Thomas Tanski, George Herzschuh, Ulrike Meyer, Hanno Eulenburg, Antje Lantuit, Hugues |
| author_facet | Fritz, Michael Opel, Thomas Tanski, George Herzschuh, Ulrike Meyer, Hanno Eulenburg, Antje Lantuit, Hugues |
| collection | Datos científicos de ciencias marinas y ambientales |
| contents | Thermal permafrost degradation and coastal erosion in the Arctic remobilize substantial amounts of organic carbon (OC) and nutrients which have accumulated in late Pleistocene and Holocene unconsolidated deposits. Permafrost vulnerability to thaw subsidence, collapsing coastlines and irreversible landscape change are largely due to the presence of large amounts of massive ground ice such as ice wedges. However, ground ice has not, until now, been considered to be a source of dissolved organic carbon (DOC), dissolved inorganic carbon (DIC) and other elements which are important for ecosystems and carbon cycling. Here we show, using biogeochemical data from a large number of different ice bodies throughout the Arctic, that ice wedges have the greatest potential for DOC storage, with a maximum of 28.6 mg/L (mean: 9.6 mg/L). Variation in DOC concentration is positively correlated with and explained by the concentrations and relative amounts of typically terrestrial cations such as Mg2+ and K+. DOC sequestration into ground ice was more effective during the late Pleistocene than during the Holocene, which can be explained by rapid sediment and OC accumulation, the prevalence of more easily degradable vegetation and immediate incorporation into permafrost. We assume that pristine snowmelt is able to leach considerable amounts of well-preserved and highly bioavailable DOC as well as other elements from surface sediments, which are rapidly frozen and stored in ground ice, especially in ice wedges, even before further degradation. We found that ice wedges in the Yedoma region represent a significant DOC (45.2 Tg) and DIC (33.6 Tg) pool in permafrost areas and a freshwater reservoir of 4200 km**3. This study underlines the need to discriminate between particulate OC and DOC to assess the availability and vulnerability of the permafrost carbon pool for ecosystems and climate feedback upon mobilization. |
| format | Dataset Open Access |
| id | pangaea_https___doi_org_10_1594_PANGAEA_846074 |
| institution | PANGAEA |
| language | en |
| publishDate | 2015 |
| publisher | PANGAEA |
| record_format | pangaea |
| spellingShingle | Dissolved organic carbon (DOC) in Arctic ground ice, from northwest Canada, east Siberia, and Alaska Fritz, Michael Opel, Thomas Tanski, George Herzschuh, Ulrike Meyer, Hanno Eulenburg, Antje Lantuit, Hugues AWI_PerDyn; AWI Arctic Land Expedition; BAR-06-1.23A; BAR-06-IW1.4A; BAR-06-IW1-29A; BAR-06-IW1-34A; BAR-06-IW3-12A; BAR-06-IW4-2A; Barrow, Northern Alaska; Bicarbonate ion; Bol'shoy Lyakhovsky Island, New Siberian Islands; Calcium; Calculated; Cape Mamontov Klyk , Western Laptev Sea; Carbon, inorganic, dissolved; Carbon, organic, dissolved; Chloride; Conductivity, electrolytic; Deuterium excess; Event label; FAI-IW14-U/Th; FAI-IW3-U/Th; FAI-IW4-U/Th; FAI-IW6-U/Th; FAI-IW7-U/Th; Fairbanks, Interior Alaska; GI-2-11; GI-2-16a; GI-2-20; GI-2-23; GI-2-29; GI-2-43; ground ice; HAND; Herschel Island, Yukon Territory, Canada; HIWCS12-MI-02; HIWCS12-MI-03; HTCO, Shimadzu TOC-V; Ice type; ICP-OES, Perkin-Elmer, Optima 3000XL; Ion chromatograph, Dionex Corporation, DX-320; Kay Point, Yukon Coast; KOM12-H20-2-1m; Komakuk Beach, Yukon Coastal Plain, Canada; KOM-SPI-1; KP12-IW1-01; KP12-IW1-02; KP12-MI-01; KP12-MI-02; KP12-MI-03; KP12-MI-04; KP12-MI-05; KP12-MI-06; KP12-MI-07; L6-C11; L6-C2; L6-C3; Latitude of event; LD05-IW-7.1_R; LD05-IW-7.18; Lena2007; LH-2012; Location of event; Longitude of event; Magnesium; MAK-IW-28.1_C1; MAK-IW-28.4_C4; MAK-IW-28.5_C5; MAK-IW-28.6_C6; Mass spectrometer Finnigan Delta-S/equilibration device; MUO11-IW-1-Block1; MUO11-IW-1-Block2; MUO11-IW-1-Block3; MUO11-IW-1-Block4; MUO11-IW-1-Block5; MUO11-IW-1-Block6; MUO11-IW-1-Block7; MUO11-IW-1-Block8; MUO11-IW-1-Block9; Muo-C1; Muo-C2; Muo-C3; Muo-C4; Muo-C5; Muo-C6; Muo-C7; Muo-C8; Muostakh Island, Eastern Laptev Sea; Nitrate; Oy7-11-IW7-11-12; Oy7-11-IW7-1-2; Oy7-11-IW7-13-14; Oy7-11-IW7-15-16; Oy7-11-IW7-17-18; Oy7-11-IW7-19-20; Oy7-11-IW7-21-22; Oy7-11-IW7-23-24; Oy7-11-IW7-3-4; Oy7-11-IW7-5-6; Oy7-11-IW7-7-8; Oy7-11-IW7-9-10; Oyogos Yar coast, Dmitry Laptev Strait; permafrost; Permafrost Research (Periglacial Dynamics) @ AWI; pH; Potassium; RB12-IW1; RB12-IW2; RB12-IW3; RB12-IW4; RB12-IW5; RB12-IW6; RB12-IW7; RB12-IW8; RB12-IW9; Roland Bay, Yukon Coastal Plain, Canada; RU-Land_2007_Lena; Samoylov Island, Lena Delta, Siberia; Sampling by hand; Sodium; SP-H2O-1-1m; Stratigraphy; Sulfate; Titration potentiometric, 794 Basic Titrino (Metrohm); TSA12-IW1-01; TSA12-IW1-02; TSA12-IW1-03; TSC12-IW1-01; TSC12-IW1-02; TSD09-6-1; TSD09-6-2; TSD09-IW-5-1; TSD12-IW1-71; TSD12-IW1-72; TSD12-IW1-73; TSD12-IW2-01; TSD12-IW2-02; TSD12-IW2-03; TSD12-MI-01; TSD12-MI-02; TSD12-MI-03; TSD12-MI-04; TSD12-MI-05; TSD12-MI-06; TSD12-MI-07; TSD12-MI-08; TSD12-MI-09; TSD12-MI-10; TSD-MI-6; δ18O; δ Deuterium Thermal permafrost degradation and coastal erosion in the Arctic remobilize substantial amounts of organic carbon (OC) and nutrients which have accumulated in late Pleistocene and Holocene unconsolidated deposits. Permafrost vulnerability to thaw subsidence, collapsing coastlines and irreversible landscape change are largely due to the presence of large amounts of massive ground ice such as ice wedges. However, ground ice has not, until now, been considered to be a source of dissolved organic carbon (DOC), dissolved inorganic carbon (DIC) and other elements which are important for ecosystems and carbon cycling. Here we show, using biogeochemical data from a large number of different ice bodies throughout the Arctic, that ice wedges have the greatest potential for DOC storage, with a maximum of 28.6 mg/L (mean: 9.6 mg/L). Variation in DOC concentration is positively correlated with and explained by the concentrations and relative amounts of typically terrestrial cations such as Mg2+ and K+. DOC sequestration into ground ice was more effective during the late Pleistocene than during the Holocene, which can be explained by rapid sediment and OC accumulation, the prevalence of more easily degradable vegetation and immediate incorporation into permafrost. We assume that pristine snowmelt is able to leach considerable amounts of well-preserved and highly bioavailable DOC as well as other elements from surface sediments, which are rapidly frozen and stored in ground ice, especially in ice wedges, even before further degradation. We found that ice wedges in the Yedoma region represent a significant DOC (45.2 Tg) and DIC (33.6 Tg) pool in permafrost areas and a freshwater reservoir of 4200 km**3. This study underlines the need to discriminate between particulate OC and DOC to assess the availability and vulnerability of the permafrost carbon pool for ecosystems and climate feedback upon mobilization. |
| title | Dissolved organic carbon (DOC) in Arctic ground ice, from northwest Canada, east Siberia, and Alaska |
| topic | AWI_PerDyn; AWI Arctic Land Expedition; BAR-06-1.23A; BAR-06-IW1.4A; BAR-06-IW1-29A; BAR-06-IW1-34A; BAR-06-IW3-12A; BAR-06-IW4-2A; Barrow, Northern Alaska; Bicarbonate ion; Bol'shoy Lyakhovsky Island, New Siberian Islands; Calcium; Calculated; Cape Mamontov Klyk , Western Laptev Sea; Carbon, inorganic, dissolved; Carbon, organic, dissolved; Chloride; Conductivity, electrolytic; Deuterium excess; Event label; FAI-IW14-U/Th; FAI-IW3-U/Th; FAI-IW4-U/Th; FAI-IW6-U/Th; FAI-IW7-U/Th; Fairbanks, Interior Alaska; GI-2-11; GI-2-16a; GI-2-20; GI-2-23; GI-2-29; GI-2-43; ground ice; HAND; Herschel Island, Yukon Territory, Canada; HIWCS12-MI-02; HIWCS12-MI-03; HTCO, Shimadzu TOC-V; Ice type; ICP-OES, Perkin-Elmer, Optima 3000XL; Ion chromatograph, Dionex Corporation, DX-320; Kay Point, Yukon Coast; KOM12-H20-2-1m; Komakuk Beach, Yukon Coastal Plain, Canada; KOM-SPI-1; KP12-IW1-01; KP12-IW1-02; KP12-MI-01; KP12-MI-02; KP12-MI-03; KP12-MI-04; KP12-MI-05; KP12-MI-06; KP12-MI-07; L6-C11; L6-C2; L6-C3; Latitude of event; LD05-IW-7.1_R; LD05-IW-7.18; Lena2007; LH-2012; Location of event; Longitude of event; Magnesium; MAK-IW-28.1_C1; MAK-IW-28.4_C4; MAK-IW-28.5_C5; MAK-IW-28.6_C6; Mass spectrometer Finnigan Delta-S/equilibration device; MUO11-IW-1-Block1; MUO11-IW-1-Block2; MUO11-IW-1-Block3; MUO11-IW-1-Block4; MUO11-IW-1-Block5; MUO11-IW-1-Block6; MUO11-IW-1-Block7; MUO11-IW-1-Block8; MUO11-IW-1-Block9; Muo-C1; Muo-C2; Muo-C3; Muo-C4; Muo-C5; Muo-C6; Muo-C7; Muo-C8; Muostakh Island, Eastern Laptev Sea; Nitrate; Oy7-11-IW7-11-12; Oy7-11-IW7-1-2; Oy7-11-IW7-13-14; Oy7-11-IW7-15-16; Oy7-11-IW7-17-18; Oy7-11-IW7-19-20; Oy7-11-IW7-21-22; Oy7-11-IW7-23-24; Oy7-11-IW7-3-4; Oy7-11-IW7-5-6; Oy7-11-IW7-7-8; Oy7-11-IW7-9-10; Oyogos Yar coast, Dmitry Laptev Strait; permafrost; Permafrost Research (Periglacial Dynamics) @ AWI; pH; Potassium; RB12-IW1; RB12-IW2; RB12-IW3; RB12-IW4; RB12-IW5; RB12-IW6; RB12-IW7; RB12-IW8; RB12-IW9; Roland Bay, Yukon Coastal Plain, Canada; RU-Land_2007_Lena; Samoylov Island, Lena Delta, Siberia; Sampling by hand; Sodium; SP-H2O-1-1m; Stratigraphy; Sulfate; Titration potentiometric, 794 Basic Titrino (Metrohm); TSA12-IW1-01; TSA12-IW1-02; TSA12-IW1-03; TSC12-IW1-01; TSC12-IW1-02; TSD09-6-1; TSD09-6-2; TSD09-IW-5-1; TSD12-IW1-71; TSD12-IW1-72; TSD12-IW1-73; TSD12-IW2-01; TSD12-IW2-02; TSD12-IW2-03; TSD12-MI-01; TSD12-MI-02; TSD12-MI-03; TSD12-MI-04; TSD12-MI-05; TSD12-MI-06; TSD12-MI-07; TSD12-MI-08; TSD12-MI-09; TSD12-MI-10; TSD-MI-6; δ18O; δ Deuterium |
| url | https://doi.org/10.1594/PANGAEA.846074 |