Linking soil descriptions to the thawing of permafrost: insights into fate of carbon and nitrogen
Permafrost soils were characterized first in the field by numerous investigators according to standard soil descriptions and were sampled by depth increment within soil horizon boundaries. Measures of bulk density, C, N, and pH were used to further characterize C and N storage for soil horizons and...
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Stockholm University
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ftawi:oai:epic.awi.de:35919 2024-09-15T17:34:55+00:00 Linking soil descriptions to the thawing of permafrost: insights into fate of carbon and nitrogen Harden, Jennifer W. Koven, C. Hugelius, Gustaf Ping, Chien-Lu McGuire, A. D. Camill, P. Jorgenson, Torre Kuhry, Peter Michaelson, G. O`Donnell, Jonathan A. Schuur, Edward. A. G. Tarnocai, Charles Johnson, K. Grosse, Guido Schädel, Christina 2014-05-12 https://epic.awi.de/id/eprint/35919/ https://hdl.handle.net/10013/epic.43835 unknown Stockholm University Harden, J. W. , Koven, C. , Hugelius, G. , Ping, C. L. , McGuire, A. D. , Camill, P. , Jorgenson, T. , Kuhry, P. , Michaelson, G. , O`Donnell, J. A. , Schuur, E. A. G. , Tarnocai, C. , Johnson, K. , Grosse, G. orcid:0000-0001-5895-2141 and Schädel, C. (2014) Linking soil descriptions to the thawing of permafrost: insights into fate of carbon and nitrogen , 3rd and final CAPP workshop, Stockholm, Sweden, 12 May 2014 - 14 May 2014 . hdl:10013/epic.43835 EPIC33rd and final CAPP workshop, Stockholm, Sweden, 2014-05-12-2014-05-14Stockholm, Sweden, Stockholm University Conference notRev 2014 ftawi 2024-06-24T04:09:53Z Permafrost soils were characterized first in the field by numerous investigators according to standard soil descriptions and were sampled by depth increment within soil horizon boundaries. Measures of bulk density, C, N, and pH were used to further characterize C and N storage for soil horizons and profiles. Field attributes for organic (Oi, Oe, Oa or L, F, H) horizons, mineral (A, E, B, C) horizons, cryoturbated (jj subscripts with mixtures of organic and mineral matrices), and gleying (subscript g with reduced colors), ice-rich layers (e.g., Wf/Cgfjj, Wf/Oafjj) were examined for differences in C, N, and bulk density. Using the Community Climate System Model (CCSM4) we calculated cumulative distributions of active layer thickness (ALT) under current and future climates. We then superposed physical state over soil horizons to explore how chemical attributes are exposed by progressive thaw. Thawing will likely expose 147 Pg of C with 10 Pg of N by 2050 (representative concentration pathway RCP scenario 4.5) and as much as 436 PgC with 29 PgN by 2100 (RCP 8.5). This represents about 30% and 80% of circumarctic permafrost carbon for yr 2050 (RCP 4.5) and yr 2100 (RCP 8.5) scenarios, respectively. Organic horizons will likely contribute the earliest pulse of CO2 via combustion and decomposition. These changes have the potential for strong additional loading to our atmosphere, water resources, and ecosystems. Conference Object Active layer thickness Ice permafrost Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center) |
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Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center) |
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ftawi |
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description |
Permafrost soils were characterized first in the field by numerous investigators according to standard soil descriptions and were sampled by depth increment within soil horizon boundaries. Measures of bulk density, C, N, and pH were used to further characterize C and N storage for soil horizons and profiles. Field attributes for organic (Oi, Oe, Oa or L, F, H) horizons, mineral (A, E, B, C) horizons, cryoturbated (jj subscripts with mixtures of organic and mineral matrices), and gleying (subscript g with reduced colors), ice-rich layers (e.g., Wf/Cgfjj, Wf/Oafjj) were examined for differences in C, N, and bulk density. Using the Community Climate System Model (CCSM4) we calculated cumulative distributions of active layer thickness (ALT) under current and future climates. We then superposed physical state over soil horizons to explore how chemical attributes are exposed by progressive thaw. Thawing will likely expose 147 Pg of C with 10 Pg of N by 2050 (representative concentration pathway RCP scenario 4.5) and as much as 436 PgC with 29 PgN by 2100 (RCP 8.5). This represents about 30% and 80% of circumarctic permafrost carbon for yr 2050 (RCP 4.5) and yr 2100 (RCP 8.5) scenarios, respectively. Organic horizons will likely contribute the earliest pulse of CO2 via combustion and decomposition. These changes have the potential for strong additional loading to our atmosphere, water resources, and ecosystems. |
format |
Conference Object |
author |
Harden, Jennifer W. Koven, C. Hugelius, Gustaf Ping, Chien-Lu McGuire, A. D. Camill, P. Jorgenson, Torre Kuhry, Peter Michaelson, G. O`Donnell, Jonathan A. Schuur, Edward. A. G. Tarnocai, Charles Johnson, K. Grosse, Guido Schädel, Christina |
spellingShingle |
Harden, Jennifer W. Koven, C. Hugelius, Gustaf Ping, Chien-Lu McGuire, A. D. Camill, P. Jorgenson, Torre Kuhry, Peter Michaelson, G. O`Donnell, Jonathan A. Schuur, Edward. A. G. Tarnocai, Charles Johnson, K. Grosse, Guido Schädel, Christina Linking soil descriptions to the thawing of permafrost: insights into fate of carbon and nitrogen |
author_facet |
Harden, Jennifer W. Koven, C. Hugelius, Gustaf Ping, Chien-Lu McGuire, A. D. Camill, P. Jorgenson, Torre Kuhry, Peter Michaelson, G. O`Donnell, Jonathan A. Schuur, Edward. A. G. Tarnocai, Charles Johnson, K. Grosse, Guido Schädel, Christina |
author_sort |
Harden, Jennifer W. |
title |
Linking soil descriptions to the thawing of permafrost: insights into fate of carbon and nitrogen |
title_short |
Linking soil descriptions to the thawing of permafrost: insights into fate of carbon and nitrogen |
title_full |
Linking soil descriptions to the thawing of permafrost: insights into fate of carbon and nitrogen |
title_fullStr |
Linking soil descriptions to the thawing of permafrost: insights into fate of carbon and nitrogen |
title_full_unstemmed |
Linking soil descriptions to the thawing of permafrost: insights into fate of carbon and nitrogen |
title_sort |
linking soil descriptions to the thawing of permafrost: insights into fate of carbon and nitrogen |
publisher |
Stockholm University |
publishDate |
2014 |
url |
https://epic.awi.de/id/eprint/35919/ https://hdl.handle.net/10013/epic.43835 |
genre |
Active layer thickness Ice permafrost |
genre_facet |
Active layer thickness Ice permafrost |
op_source |
EPIC33rd and final CAPP workshop, Stockholm, Sweden, 2014-05-12-2014-05-14Stockholm, Sweden, Stockholm University |
op_relation |
Harden, J. W. , Koven, C. , Hugelius, G. , Ping, C. L. , McGuire, A. D. , Camill, P. , Jorgenson, T. , Kuhry, P. , Michaelson, G. , O`Donnell, J. A. , Schuur, E. A. G. , Tarnocai, C. , Johnson, K. , Grosse, G. orcid:0000-0001-5895-2141 and Schädel, C. (2014) Linking soil descriptions to the thawing of permafrost: insights into fate of carbon and nitrogen , 3rd and final CAPP workshop, Stockholm, Sweden, 12 May 2014 - 14 May 2014 . hdl:10013/epic.43835 |
_version_ |
1810433091656744960 |