Ändra sökning
RefereraExporteraLänk till posten
Permanent länk

Direktlänk
Referera
Referensformat
  • apa
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Annat format
Fler format
Språk
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Annat språk
Fler språk
Utmatningsformat
  • html
  • text
  • asciidoc
  • rtf
Decade of experimental permafrost thaw reduces turnover of young carbon and increases losses of old carbon, without affecting the net carbon balance
Umeå universitet, Institutionen för ekologi, miljö och geovetenskap.ORCID-id: 0000-0003-3857-3210
Umeå universitet, Institutionen för ekologi, miljö och geovetenskap.ORCID-id: 0000-0001-8814-0013
Umeå universitet, Institutionen för ekologi, miljö och geovetenskap.ORCID-id: 0000-0001-9923-2036
Visa övriga samt affilieringar
Ansvarig organisation
2020 (Engelska)Ingår i: Global Change Biology, ISSN 1354-1013, E-ISSN 1365-2486, Vol. 26, nr 10, s. 5886-5898Artikel i tidskrift (Refereegranskat) Published
Abstract [en]

Thicker snowpacks and their insulation effects cause winter-warming and invoke thaw of permafrost ecosystems. Temperature-dependent decomposition of previously frozen carbon (C) is currently considered one of the strongest feedbacks between the Arctic and the climate system, but the direction and magnitude of the net C balance remains uncertain. This is because winter effects are rarely integrated with C fluxes during the snow-free season and because predicting the net C balance from both surface processes and thawing deep layers remains challenging. In this study, we quantified changes in the long-term net C balance (net ecosystem production) in a subarctic peat plateau subjected to 10 years of experimental winter-warming. By combining(210)Pb and(14)Cdating of peat cores with peat growth models, we investigated thawing effects on year-round primary production and C losses through respiration and leaching from both shallow and deep peat layers. Winter-warming and permafrost thaw had no effect on the net C balance, but strongly affected gross C fluxes. Carbon losses through decomposition from the upper peat were reduced as thawing of permafrost induced surface subsidence and subsequent waterlogging. However, primary production was also reduced likely due to a strong decline in bryophytes cover while losses from the old C pool almost tripled, caused by the deepened active layer. Our findings highlight the need to estimate long-term responses of whole-year production and decomposition processes to thawing, both in shallow and deep soil layers, as they may contrast and lead to unexpected net effects on permafrost C storage.

Ort, förlag, år, upplaga, sidor
John Wiley & Sons , 2020. Vol. 26, nr 10, s. 5886-5898
Nyckelord [en]
age-depth modelling, carbon accumulation, carbon cycle, climate change, decomposition, peat dating, permafrost thawing, production, snow addition, winter-warming
Nationell ämneskategori
Klimatforskning
Identifikatorer
URN: urn:nbn:se:polar:diva-8548DOI: 10.1111/gcb.15283ISI: 000560893800001PubMedID: 32681580OAI: oai:DiVA.org:polar-8548DiVA, id: diva2:1517623
Tillgänglig från: 2021-01-14 Skapad: 2021-01-14 Senast uppdaterad: 2021-01-14Bibliografiskt granskad

Open Access i DiVA

fulltext(909 kB)23 nedladdningar
Filinformation
Filnamn FULLTEXT01.pdfFilstorlek 909 kBChecksumma SHA-512
a244e47fa84b2955bde11da7f4c555ab77888e6529b8e93f398eae836d44b8ca7fbe5024f652ad0f6b3b41bc3b50a851f0c426d2d542acfd2aabf134d5c786be
Typ fulltextMimetyp application/pdf

Övriga länkar

Förlagets fulltextPubMedFulltext

Sök vidare i DiVA

Av författaren/redaktören
Olid, CarolinaKlaminder, JonatanMonteux, SylvainDorrepaal, Ellen
I samma tidskrift
Global Change Biology
Klimatforskning

Sök vidare utanför DiVA

GoogleGoogle Scholar
Totalt: 23 nedladdningar
Antalet nedladdningar är summan av nedladdningar för alla fulltexter. Det kan inkludera t.ex tidigare versioner som nu inte längre är tillgängliga.

doi
pubmed
urn-nbn

Altmetricpoäng

doi
pubmed
urn-nbn
Totalt: 111 träffar
RefereraExporteraLänk till posten
Permanent länk

Direktlänk
Referera
Referensformat
  • apa
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Annat format
Fler format
Språk
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Annat språk
Fler språk
Utmatningsformat
  • html
  • text
  • asciidoc
  • rtf