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LIBRIS Formathandbok  (Information om MARC21)
FältnamnIndikatorerMetadata
00004413naa a2200601 4500
001oai:DiVA.org:su-186658
003SwePub
008201207s2020 | |||||||||||000 ||eng|
009oai:DiVA.org:umu-175825
0247 a https://urn.kb.se/resolve?urn=urn:nbn:se:su:diva-1866582 URI
0247 a https://doi.org/10.1073/pnas.19163871172 DOI
0247 a https://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-1758252 URI
040 a (SwePub)sud (SwePub)umu
041 a engb eng
042 9 SwePub
072 7a ref2 swepub-contenttype
072 7a art2 swepub-publicationtype
1001 a Hugelius, Gustafu Stockholms universitet,Institutionen för naturgeografi,Stanford University, USA4 aut0 (Swepub:su)chuge
2451 0a Large stocks of peatland carbon and nitrogen are vulnerable to permafrost thaw
264 c 2020-08-10
264 1b Proceedings of the National Academy of Sciences,c 2020
338 a print2 rdacarrier
520 a Northern peatlands have accumulated large stocks of organic carbon (C) and nitrogen (N), but their spatial distribution and vulnerability to climate warming remain uncertain. Here, we used machine-learning techniques with extensive peat core data (n > 7,000) to create observation-based maps of northern peatland C and N stocks, and to assess their response to warming and permafrost thaw. We estimate that northern peatlands cover 3.7 ± 0.5 million km2 and store 415 ± 150 Pg C and 10 ± 7 Pg N. Nearly half of the peatland area and peat C stocks are permafrost affected. Using modeled global warming stabilization scenarios (from 1.5 to 6 °C warming), we project that the current sink of atmospheric C (0.10 ± 0.02 Pg C⋅y−1) in northern peatlands will shift to a C source as 0.8 to 1.9 million km2 of permafrost-affected peatlands thaw. The projected thaw would cause peatland greenhouse gas emissions equal to ∼1% of anthropogenic radiative forcing in this century. The main forcing is from methane emissions (0.7 to 3 Pg cumulative CH4-C) with smaller carbon dioxide forcing (1 to 2 Pg CO2-C) and minor nitrous oxide losses. We project that initial CO2-C losses reverse after ∼200 y, as warming strengthens peatland C-sinks. We project substantial, but highly uncertain, additional losses of peat into fluvial systems of 10 to 30 Pg C and 0.4 to 0.9 Pg N. The combined gaseous and fluvial peatland C loss estimated here adds 30 to 50% onto previous estimates of permafrost-thaw C losses, with southern permafrost regions being the most vulnerable.
650 7a NATURVETENSKAPx Geovetenskap och miljövetenskap0 (SwePub)1052 hsv//swe
650 7a NATURAL SCIENCESx Earth and Related Environmental Sciences0 (SwePub)1052 hsv//eng
650 7a NATURVETENSKAPx Geovetenskap och miljövetenskapx Klimatforskning0 (SwePub)105012 hsv//swe
650 7a NATURAL SCIENCESx Earth and Related Environmental Sciencesx Climate Research0 (SwePub)105012 hsv//eng
653 a northern peatlands
653 a carbon stocks
653 a nitrogen stocks
653 a greenhouse gas fluxes
653 a permafrost thaw
7001 a Loisel, Julie4 aut
7001 a Chadburn, Sarah4 aut
7001 a Jackson, Robert B.4 aut
7001 a Jones, Miriam4 aut
7001 a MacDonald, Glen4 aut
7001 a Marushchak, Maija4 aut
7001 a Olefeldt, David4 aut
7001 a Packalen, Maara4 aut
7001 a Siewert, Matthias B.u Umeå universitet,Institutionen för ekologi, miljö och geovetenskap,Arcum4 aut0 (Swepub:umu)masi0110
7001 a Treat, Claire4 aut
7001 a Turetsky, Merritt4 aut
7001 a Voigt, Carolina4 aut
7001 a Yu, Zicheng4 aut
7102 a Stockholms universitetb Institutionen för naturgeografi4 org
7730 t Proceedings of the National Academy of Sciences of the United States of Americad : Proceedings of the National Academy of Sciencesg 117:34, s. 20438-20446q 117:34<20438-20446x 0027-8424x 1091-6490
8564 u https://doi.org/10.1073/pnas.1916387117y Fulltext
8564 u https://www.pnas.org/content/pnas/117/34/20438.full.pdf
8564 u https://umu.diva-portal.org/smash/get/diva2:1475321/FULLTEXT01.pdfx primaryx Raw objecty fulltext:print
8564 8u https://urn.kb.se/resolve?urn=urn:nbn:se:su:diva-186658
8564 8u https://doi.org/10.1073/pnas.1916387117
8564 8u https://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-175825

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