Amplified carbon release from vast West Siberian peatlands by 2100
[1] Extensive new data from previously unstudied Siberian streams and rivers suggest that mobilization of currently frozen, high-latitude soil carbon is likely over the next century in response to predicted Arctic warming. We present dissolved organic carbon (DOC) measurements from ninety-six waters...
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ftciteseerx:oai:CiteSeerX.psu:10.1.1.468.1211 2023-05-15T14:53:42+02:00 Amplified carbon release from vast West Siberian peatlands by 2100 Karen E. Frey Laurence C. Smith The Pennsylvania State University CiteSeerX Archives application/pdf http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.468.1211 http://wordpress.clarku.edu/kfrey/files/2011/01/Frey_GRL2005.pdf en eng http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.468.1211 http://wordpress.clarku.edu/kfrey/files/2011/01/Frey_GRL2005.pdf Metadata may be used without restrictions as long as the oai identifier remains attached to it. http://wordpress.clarku.edu/kfrey/files/2011/01/Frey_GRL2005.pdf text ftciteseerx 2016-01-08T07:03:11Z [1] Extensive new data from previously unstudied Siberian streams and rivers suggest that mobilization of currently frozen, high-latitude soil carbon is likely over the next century in response to predicted Arctic warming. We present dissolved organic carbon (DOC) measurements from ninety-six watersheds in West Siberia, a region that contains the world’s largest stores of peat carbon, exports massive volumes of freshwater and DOC to the Arctic Ocean, and is warming faster than the Arctic as a whole. The sample sites span 106 km2 over a large climatic gradient (55–68N), providing data on a much broader spatial scale than previous studies and for the first time explicitly examining stream DOC in permafrost peatland environments. Our results show that cold, permafrost-influenced watersheds release little DOC to streams, regardless of the extent of peatland cover. However, we find considerably higher concentrations in warm, permafrost-free watersheds, rising sharply as a function of peatland cover. The two regimes are demarcated by the position of the 2C mean annual air temperature (MAAT) isotherm, which is also approximately coincident with the permafrost limit. Climate model simulations for the next century predict near-doubling of West Siberian land surface areas with a MAAT warmer than 2C, suggesting up to 700 % increases in stream DOC concentrations and 2.7– 4.3 Tg yr1 (29–46%) increases in DOC flux to the Text Arctic Arctic Ocean permafrost Siberia Unknown Arctic Arctic Ocean |
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English |
description |
[1] Extensive new data from previously unstudied Siberian streams and rivers suggest that mobilization of currently frozen, high-latitude soil carbon is likely over the next century in response to predicted Arctic warming. We present dissolved organic carbon (DOC) measurements from ninety-six watersheds in West Siberia, a region that contains the world’s largest stores of peat carbon, exports massive volumes of freshwater and DOC to the Arctic Ocean, and is warming faster than the Arctic as a whole. The sample sites span 106 km2 over a large climatic gradient (55–68N), providing data on a much broader spatial scale than previous studies and for the first time explicitly examining stream DOC in permafrost peatland environments. Our results show that cold, permafrost-influenced watersheds release little DOC to streams, regardless of the extent of peatland cover. However, we find considerably higher concentrations in warm, permafrost-free watersheds, rising sharply as a function of peatland cover. The two regimes are demarcated by the position of the 2C mean annual air temperature (MAAT) isotherm, which is also approximately coincident with the permafrost limit. Climate model simulations for the next century predict near-doubling of West Siberian land surface areas with a MAAT warmer than 2C, suggesting up to 700 % increases in stream DOC concentrations and 2.7– 4.3 Tg yr1 (29–46%) increases in DOC flux to the |
author2 |
The Pennsylvania State University CiteSeerX Archives |
format |
Text |
author |
Karen E. Frey Laurence C. Smith |
spellingShingle |
Karen E. Frey Laurence C. Smith Amplified carbon release from vast West Siberian peatlands by 2100 |
author_facet |
Karen E. Frey Laurence C. Smith |
author_sort |
Karen E. Frey |
title |
Amplified carbon release from vast West Siberian peatlands by 2100 |
title_short |
Amplified carbon release from vast West Siberian peatlands by 2100 |
title_full |
Amplified carbon release from vast West Siberian peatlands by 2100 |
title_fullStr |
Amplified carbon release from vast West Siberian peatlands by 2100 |
title_full_unstemmed |
Amplified carbon release from vast West Siberian peatlands by 2100 |
title_sort |
amplified carbon release from vast west siberian peatlands by 2100 |
url |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.468.1211 http://wordpress.clarku.edu/kfrey/files/2011/01/Frey_GRL2005.pdf |
geographic |
Arctic Arctic Ocean |
geographic_facet |
Arctic Arctic Ocean |
genre |
Arctic Arctic Ocean permafrost Siberia |
genre_facet |
Arctic Arctic Ocean permafrost Siberia |
op_source |
http://wordpress.clarku.edu/kfrey/files/2011/01/Frey_GRL2005.pdf |
op_relation |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.468.1211 http://wordpress.clarku.edu/kfrey/files/2011/01/Frey_GRL2005.pdf |
op_rights |
Metadata may be used without restrictions as long as the oai identifier remains attached to it. |
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1766325289244164096 |