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| Titel |
Permafrost-affected soils and their carbon pools with a focus on the Russian Arctic |
| VerfasserIn |
S. Zubrzycki, L. Kutzbach, E.-M. Pfeiffer |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
1869-9510
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| Digitales Dokument |
URL |
| Erschienen |
In: Solid Earth ; 5, no. 2 ; Nr. 5, no. 2 (2014-07-01), S.595-609 |
| Datensatznummer |
250115311
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| Publikation (Nr.) |
 copernicus.org/se-5-595-2014.pdf |
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| Zusammenfassung |
| Permafrost-affected soils have accumulated enormous pools of organic
matter during the Quaternary period. The area occupied by these
soils amounts to more than 8.6 million km2, which is
about 27% of all land areas north of 50° N. Therefore,
permafrost-affected soils are considered to be one of the
important cryosphere elements within the climate system. Due to the
cryopedogenic processes that form these particular soils and the
overlying vegetation that is adapted to the arctic climate, organic
matter has accumulated to the present extent of up to
1024 Pg (1 Pg = 1015 g = 1 Gt)
of soil organic carbon stored within the uppermost 3 m of
ground. Considering the observed progressive climate change and the
projected polar amplification, permafrost-affected soils will
undergo fundamental property changes. Higher turnover and
mineralisation rates of the organic matter are consequences of these
changes, which are expected to result in an increased release of
climate-relevant trace gases into the atmosphere. The controversy
of whether permafrost regions continue accumulating carbon or
already function as a carbon source remains open until today. An
increased focus on this subject matter, especially in
underrepresented Siberian regions, could contribute to a more robust
estimation of the soil organic carbon pool of permafrost regions and
at the same time improve the understanding of the carbon sink and
source functions of permafrost-affected soils. |
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