Field information links permafrost carbon to physical vulnerabilities of thawing
[1] Deep soil profiles containing permafrost (Gelisols) were characterized for organic carbon (C) and total nitrogen (N) stocks to 3 m depths. Using the Community Climate System Model (CCSM4) we calculate cumulative distributions of active layer thickness (ALT) under current and future climates. The...
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ftciteseerx:oai:CiteSeerX.psu:10.1.1.296.6985 2023-05-15T13:03:11+02:00 Field information links permafrost carbon to physical vulnerabilities of thawing Jennifer W. Harden Charles D. Koven Chien-lu Ping Gustaf Hugelius A. David Mcguire Phillip Camill Torre Jorgenson Peter Kuhry Gary J. Michaelson Guido Grosse The Pennsylvania State University CiteSeerX Archives 2012 application/pdf http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.296.6985 http://www.lter.uaf.edu/pdf/1644_Harden_Koven_2012.pdf en eng http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.296.6985 http://www.lter.uaf.edu/pdf/1644_Harden_Koven_2012.pdf Metadata may be used without restrictions as long as the oai identifier remains attached to it. http://www.lter.uaf.edu/pdf/1644_Harden_Koven_2012.pdf text 2012 ftciteseerx 2016-01-07T21:49:32Z [1] Deep soil profiles containing permafrost (Gelisols) were characterized for organic carbon (C) and total nitrogen (N) stocks to 3 m depths. Using the Community Climate System Model (CCSM4) we calculate cumulative distributions of active layer thickness (ALT) under current and future climates. The difference in cumulative ALT distributions over time was multiplied by C and N contents of soil horizons in Gelisol suborders to calculate newly thawed C and N. Thawing ranged from 147 PgC with 10 PgN by 2050 (representative concentration pathway RCP scenario 4.5) to 436 PgC with 29 PgN by 2100 (RCP 8.5). Organic horizons that thaw are vulnerable to combustion, and all horizon types are vulnerable to shifts in hydrology and decomposition. The rates and extent of such losses are unknown and can be further constrained by linking field and modelling approaches. These changes have the potential for strong additional loading to our atmosphere, water resources, and ecosystems. Text Active layer thickness permafrost Unknown |
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description |
[1] Deep soil profiles containing permafrost (Gelisols) were characterized for organic carbon (C) and total nitrogen (N) stocks to 3 m depths. Using the Community Climate System Model (CCSM4) we calculate cumulative distributions of active layer thickness (ALT) under current and future climates. The difference in cumulative ALT distributions over time was multiplied by C and N contents of soil horizons in Gelisol suborders to calculate newly thawed C and N. Thawing ranged from 147 PgC with 10 PgN by 2050 (representative concentration pathway RCP scenario 4.5) to 436 PgC with 29 PgN by 2100 (RCP 8.5). Organic horizons that thaw are vulnerable to combustion, and all horizon types are vulnerable to shifts in hydrology and decomposition. The rates and extent of such losses are unknown and can be further constrained by linking field and modelling approaches. These changes have the potential for strong additional loading to our atmosphere, water resources, and ecosystems. |
author2 |
The Pennsylvania State University CiteSeerX Archives |
format |
Text |
author |
Jennifer W. Harden Charles D. Koven Chien-lu Ping Gustaf Hugelius A. David Mcguire Phillip Camill Torre Jorgenson Peter Kuhry Gary J. Michaelson Guido Grosse |
spellingShingle |
Jennifer W. Harden Charles D. Koven Chien-lu Ping Gustaf Hugelius A. David Mcguire Phillip Camill Torre Jorgenson Peter Kuhry Gary J. Michaelson Guido Grosse Field information links permafrost carbon to physical vulnerabilities of thawing |
author_facet |
Jennifer W. Harden Charles D. Koven Chien-lu Ping Gustaf Hugelius A. David Mcguire Phillip Camill Torre Jorgenson Peter Kuhry Gary J. Michaelson Guido Grosse |
author_sort |
Jennifer W. Harden |
title |
Field information links permafrost carbon to physical vulnerabilities of thawing |
title_short |
Field information links permafrost carbon to physical vulnerabilities of thawing |
title_full |
Field information links permafrost carbon to physical vulnerabilities of thawing |
title_fullStr |
Field information links permafrost carbon to physical vulnerabilities of thawing |
title_full_unstemmed |
Field information links permafrost carbon to physical vulnerabilities of thawing |
title_sort |
field information links permafrost carbon to physical vulnerabilities of thawing |
publishDate |
2012 |
url |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.296.6985 http://www.lter.uaf.edu/pdf/1644_Harden_Koven_2012.pdf |
genre |
Active layer thickness permafrost |
genre_facet |
Active layer thickness permafrost |
op_source |
http://www.lter.uaf.edu/pdf/1644_Harden_Koven_2012.pdf |
op_relation |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.296.6985 http://www.lter.uaf.edu/pdf/1644_Harden_Koven_2012.pdf |
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Metadata may be used without restrictions as long as the oai identifier remains attached to it. |
_version_ |
1766330499165323264 |