Permafrost development in northern Fennoscandian peatlands since the mid-Holocene

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Fältnamn	Indikatorer	Metadata
000		02921naa a2200361 4500
001		oai:DiVA.org:su-223245
003		SwePub
008		231113s2023 \| \|\|\|\|\|\|\|\|\|\|\|000 \|\|eng\|
024	7	a https://urn.kb.se/resolve?urn=urn:nbn:se:su:diva-2232452 URI
024	7	a https://doi.org/10.1080/15230430.2023.22500352 DOI
040		a (SwePub)su
041		a engb eng
042		9 SwePub
072	7	a ref2 swepub-contenttype
072	7	a art2 swepub-publicationtype
100	1	a Hichens-Bergström, Maritu Stockholms universitet,Institutionen för naturgeografi,Bolincentret för klimatforskning (tills m KTH & SMHI)4 aut
245	1 0	a Permafrost development in northern Fennoscandian peatlands since the mid-Holocene
264	1	c 2023
338		a print2 rdacarrier
520		a Increased permafrost temperatures have been reported in the circum-Arctic, and widespread degradation of permafrost peatlands has occurred in recent decades. The timing of permafrost aggradation in these ecosystems could have implications for the soil carbon lability upon thawing, and an increased understanding of the permafrost history is therefore needed to better project future carbon feedbacks. In this study, we have conducted high-resolution plant macrofossil and geochemical analyses and accelerator mass spectrometry radiocarbon dating of active layer cores from four permafrost peatlands in northern Sweden and Norway. In the mid-Holocene, all four sites were wet fens, and at least three of them remained permafrost-free until a shift in vegetation toward bog species was recorded around 800 to 400 cal. BP, suggesting permafrost aggradation during the Little Ice Age. At one site, Karlebotn, the plant macrofossil record also indicated a period of dry bog conditions between 3300 and 2900 cal. BP, followed by a rapid shift toward species growing in waterlogged fens or open pools, suggesting that permafrost possibly was present around 3000 cal. BP but thawed and was replaced by thermokarst.
650	7	a NATURVETENSKAPx Geovetenskap och miljövetenskapx Naturgeografi0 (SwePub)105072 hsv//swe
650	7	a NATURAL SCIENCESx Earth and Related Environmental Sciencesx Physical Geography0 (SwePub)105072 hsv//eng
653		a Sub-Arctic peatlands
653		a plant macrofossils
653		a carbon/nitrogen ratio
653		a stable isotopes
653		a late Holocene
700	1	a Sannel, A. Britta K.,d 1968-u Stockholms universitet,Institutionen för naturgeografi,Bolincentret för klimatforskning (tills m KTH & SMHI)4 aut0 (Swepub:su)bsann
710	2	a Stockholms universitetb Institutionen för naturgeografi4 org
773	0	t Arctic, Antarctic and Alpine researchg 55:1q 55:1x 1523-0430x 1938-4246
856	4	u https://doi.org/10.1080/15230430.2023.2250035y Fulltext
856	4 8	u https://urn.kb.se/resolve?urn=urn:nbn:se:su:diva-223245
856	4 8	u https://doi.org/10.1080/15230430.2023.2250035

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