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 fluxes vary in sign and magnitude. Without accurate estimates of current carbon fluxes from Arctic and boreal ecosystems, predicting the response of these systems to global chang...
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ftcdlib:oai:escholarship.org:ark:/13030/qt542751wf 2023-05-15T14:52:30+02:00 Controls over carbon storage and turnover in high-latitude soils. Hobbie, Sarah E Schimel, Joshua P Trumbore, Susan E Randerson, James R 196 - 210 2000-12-01 application/pdf https://escholarship.org/uc/item/542751wf unknown eScholarship, University of California qt542751wf https://escholarship.org/uc/item/542751wf CC-BY CC-BY Global change biology, vol 6, iss S1 Arctic boreal carbon decomposition global change soil Environmental Sciences Biological Sciences Ecology article 2000 ftcdlib 2022-08-15T17:29:27Z Despite the importance of Arctic and boreal regions in the present carbon cycle, estimates of annual high-latitude carbon fluxes vary in sign and magnitude. Without accurate estimates of current carbon fluxes 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 significantly to annual soil carbon fluxes. However, the controls over this winter activity remain poorly understood. Finally, processes at the landscape scale, such as fire, permafrost dynamics, and drainage, control regional carbon fluxes, complicating the extrapolation of site-level measurements to regional scales. Article in Journal/Newspaper Arctic Climate change permafrost University of California: eScholarship Arctic |
institution |
Open Polar |
collection |
University of California: eScholarship |
op_collection_id |
ftcdlib |
language |
unknown |
topic |
Arctic boreal carbon decomposition global change soil Environmental Sciences Biological Sciences Ecology |
spellingShingle |
Arctic boreal carbon decomposition global change soil Environmental Sciences Biological Sciences Ecology Hobbie, Sarah E Schimel, Joshua P Trumbore, Susan E Randerson, James R Controls over carbon storage and turnover in high-latitude soils. |
topic_facet |
Arctic boreal carbon decomposition global change soil Environmental Sciences Biological Sciences Ecology |
description |
Despite the importance of Arctic and boreal regions in the present carbon cycle, estimates of annual high-latitude carbon fluxes vary in sign and magnitude. Without accurate estimates of current carbon fluxes 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 significantly to annual soil carbon fluxes. However, the controls over this winter activity remain poorly understood. Finally, processes at the landscape scale, such as fire, permafrost dynamics, and drainage, control regional carbon fluxes, complicating the extrapolation of site-level measurements to regional scales. |
format |
Article in Journal/Newspaper |
author |
Hobbie, Sarah E Schimel, Joshua P Trumbore, Susan E Randerson, James R |
author_facet |
Hobbie, Sarah E Schimel, Joshua P Trumbore, Susan E Randerson, James R |
author_sort |
Hobbie, Sarah E |
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. |
publisher |
eScholarship, University of California |
publishDate |
2000 |
url |
https://escholarship.org/uc/item/542751wf |
op_coverage |
196 - 210 |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic Climate change permafrost |
genre_facet |
Arctic Climate change permafrost |
op_source |
Global change biology, vol 6, iss S1 |
op_relation |
qt542751wf https://escholarship.org/uc/item/542751wf |
op_rights |
CC-BY |
op_rightsnorm |
CC-BY |
_version_ |
1766323747347759104 |