Reviews and syntheses: Changing ecosystem influences on soil thermal regimes in northern high-latitude permafrost regions

Research output: Contribution to journalReview article

Abstract

Soils in Arctic and boreal ecosystems store twice as much carbon as the atmosphere, a portion of which may be released as high-latitude soils warm. Some of the uncertainty in the timing and magnitude of the permafrost-climate feedback stems from complex interactions between ecosystem properties and soil thermal dynamics. Terrestrial ecosystems fundamentally regulate the response of permafrost to climate change by influencing surface energy partitioning and the thermal properties of soil itself. Here we review how Arctic and boreal ecosystem processes influence thermal dynamics in permafrost soil and how these linkages may evolve in response to climate change. While many of the ecosystem characteristics and processes affecting soil thermal dynamics have been examined individually (e.g., vegetation, soil moisture, and soil structure), interactions among these processes are less understood. Changes in ecosystem type and vegetation characteristics will alter spatial patterns of interactions between climate and permafrost. In addition to shrub expansion, other vegetation responses to changes in climate and rapidly changing disturbance regimes will affect ecosystem surface energy partitioning in ways that are important for permafrost. Lastly, changes in vegetation and ecosystem distribution will lead to regional and global biophysical and biogeochemical climate feedbacks that may compound or offset local impacts on permafrost soils. Consequently, accurate prediction of the permafrost carbon climate feedback will require detailed understanding of changes in terrestrial ecosystem distribution and function, which depend on the net effects of multiple feedback processes operating across scales in space and time.

Details

Authors
  • Michael M. Loranty
  • Benjamin W. Abbott
  • Daan Blok
  • Thomas A. Douglas
  • Howard E. Epstein
  • Bruce C. Forbes
  • Benjamin M. Jones
  • Alexander L. Kholodov
  • Heather Kropp
  • Avni Malhotra
  • Steven D. Mamet
  • Isla H. Myers-Smith
  • Susan M. Natali
  • Jonathan A. O'Donnell
  • Gareth K. Phoenix
  • Adrian V. Rocha
  • Oliver Sonnentag
  • Ken D. Tape
  • Donald A. Walker
Organisations
External organisations
  • Brigham Young University
  • University of Virginia
  • University of Lapland
  • University of Alaska Fairbanks
  • Oak Ridge National Laboratory
  • University of Edinburgh
  • Woods Hole Oceanographic Institution
  • University of Sheffield
  • University of Notre Dame
  • University of Montreal, Canada
  • Colgate University
  • Cold Regions Research and Engineering Laboratory
  • University of Saskatchewan
  • US National Park Service
Research areas and keywords

Subject classification (UKÄ) – MANDATORY

  • Environmental Sciences
  • Climate Research
Original languageEnglish
Pages (from-to)5287-5313
Number of pages27
JournalBiogeosciences
Volume15
Issue number17
Publication statusPublished - 2018 Aug 31
Publication categoryResearch
Peer-reviewedYes