Controls over carbon storage and turnover in high-latitude soils
Despite the importance of Arctic and boreal regions in the present carbon cycle, estimates of annual high-latitude carbon ¯uxes vary in sign and magnitude. Without accurate estimates of current carbon ¯uxes from Arctic and boreal ecosystems, predicting the response of these systems to global change...
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ftciteseerx:oai:CiteSeerX.psu:10.1.1.420.2990 2023-05-15T14:52:28+02:00 Controls over carbon storage and turnover in high-latitude soils Sarah E. Hobbie Joshua P. Schimel Susan E. Trumbore James R. Randerson The Pennsylvania State University CiteSeerX Archives 2001 application/pdf http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.420.2990 http://www.lter.uaf.edu/pdf/833_hobbie_schimel_2000.pdf en eng http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.420.2990 http://www.lter.uaf.edu/pdf/833_hobbie_schimel_2000.pdf Metadata may be used without restrictions as long as the oai identifier remains attached to it. http://www.lter.uaf.edu/pdf/833_hobbie_schimel_2000.pdf Arctic boreal carbon decomposition global change soil text 2001 ftciteseerx 2016-01-08T03:59:08Z Despite the importance of Arctic and boreal regions in the present carbon cycle, estimates of annual high-latitude carbon ¯uxes vary in sign and magnitude. Without accurate estimates of current carbon ¯uxes from Arctic and boreal ecosystems, predicting the response of these systems to global change is daunting. A number of factors control carbon turnover in high-latitude soils, but because they are unique to northern systems, they are mostly ignored by biogeochemical models used to predict the response of these systems to global change. Here, we review those factors. First, many northern systems are dominated by mosses, whose extremely slow decomposition is not predicted by commonly used indices of litter quality. Second, cold temperature, permafrost, waterlogging, and substrate quality interact to stabilize soil organic matter, but the relative importance of these factors, and how they respond to climate change, is unknown. Third, recent evidence suggests that biological activity occurring over winter can contribute signi®cantly to annual soil carbon ¯uxes. However, the controls over this winter activity remain poorly understood. Finally, processes at the landscape scale, such as ®re, permafrost dynamics, and drainage, control regional carbon ¯uxes, complicating the extrapolation of site-level measurements to regional scales. Text Arctic Climate change permafrost Unknown Arctic |
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ftciteseerx |
language |
English |
topic |
Arctic boreal carbon decomposition global change soil |
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Arctic boreal carbon decomposition global change soil Sarah E. Hobbie Joshua P. Schimel Susan E. Trumbore James R. Randerson Controls over carbon storage and turnover in high-latitude soils |
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Arctic boreal carbon decomposition global change soil |
description |
Despite the importance of Arctic and boreal regions in the present carbon cycle, estimates of annual high-latitude carbon ¯uxes vary in sign and magnitude. Without accurate estimates of current carbon ¯uxes from Arctic and boreal ecosystems, predicting the response of these systems to global change is daunting. A number of factors control carbon turnover in high-latitude soils, but because they are unique to northern systems, they are mostly ignored by biogeochemical models used to predict the response of these systems to global change. Here, we review those factors. First, many northern systems are dominated by mosses, whose extremely slow decomposition is not predicted by commonly used indices of litter quality. Second, cold temperature, permafrost, waterlogging, and substrate quality interact to stabilize soil organic matter, but the relative importance of these factors, and how they respond to climate change, is unknown. Third, recent evidence suggests that biological activity occurring over winter can contribute signi®cantly to annual soil carbon ¯uxes. However, the controls over this winter activity remain poorly understood. Finally, processes at the landscape scale, such as ®re, permafrost dynamics, and drainage, control regional carbon ¯uxes, complicating the extrapolation of site-level measurements to regional scales. |
author2 |
The Pennsylvania State University CiteSeerX Archives |
format |
Text |
author |
Sarah E. Hobbie Joshua P. Schimel Susan E. Trumbore James R. Randerson |
author_facet |
Sarah E. Hobbie Joshua P. Schimel Susan E. Trumbore James R. Randerson |
author_sort |
Sarah E. Hobbie |
title |
Controls over carbon storage and turnover in high-latitude soils |
title_short |
Controls over carbon storage and turnover in high-latitude soils |
title_full |
Controls over carbon storage and turnover in high-latitude soils |
title_fullStr |
Controls over carbon storage and turnover in high-latitude soils |
title_full_unstemmed |
Controls over carbon storage and turnover in high-latitude soils |
title_sort |
controls over carbon storage and turnover in high-latitude soils |
publishDate |
2001 |
url |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.420.2990 http://www.lter.uaf.edu/pdf/833_hobbie_schimel_2000.pdf |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic Climate change permafrost |
genre_facet |
Arctic Climate change permafrost |
op_source |
http://www.lter.uaf.edu/pdf/833_hobbie_schimel_2000.pdf |
op_relation |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.420.2990 http://www.lter.uaf.edu/pdf/833_hobbie_schimel_2000.pdf |
op_rights |
Metadata may be used without restrictions as long as the oai identifier remains attached to it. |
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1766323706398769152 |