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2021-08-02Zeitschriftenartikel DOI: 10.1088/1748-9326/ac153d
Sensitivity of ecosystem-protected permafrost under changing boreal forest structures
dc.contributor.authorStuenzi, Simone M
dc.contributor.authorBoike, Julia
dc.contributor.authorGädeke, Anne
dc.contributor.authorHerzschuh, Ulrike
dc.contributor.authorKruse, Stefan
dc.contributor.authorPestryakova, Luidmila A
dc.contributor.authorWestermann, Sebastian
dc.contributor.authorLanger, Moritz
dc.date.accessioned2022-08-08T14:36:40Z
dc.date.available2022-08-08T14:36:40Z
dc.date.issued2021-08-02none
dc.date.updated2022-01-29T13:09:26Z
dc.identifier.urihttp://edoc.hu-berlin.de/18452/25774
dc.description.abstractBoreal forests efficiently insulate underlying permafrost. The magnitude of this insulation effect is dependent on forest density and composition. A change therein modifies the energy and water fluxes within and below the canopy. The direct influence of climatic change on forests and the indirect effect through a change in permafrost dynamics lead to extensive ecosystem shifts such as a change in composition or density, which will, in turn, affect permafrost persistence. We derive future scenarios of forest density and plant functional type composition by analyzing future projections provided by the dynamic global vegetation model (LPJ-GUESS) under global warming scenarios. We apply a detailed permafrost-multilayer canopy model to study the spatial impact-variability of simulated future scenarios of forest densities and compositions for study sites throughout eastern Siberia. Our results show that a change in forest density has a clear effect on the ground surface temperatures (GST) and the maximum active layer thickness (ALT) at all sites, but the direction depends on local climate conditions. At two sites, higher forest density leads to a significant decrease in GSTs in the snow-free period, while leading to an increase at the warmest site. Complete forest loss leads to a deepening of the ALT up to 0.33 m and higher GSTs of over 8 ∘C independently of local climatic conditions. Forest loss can induce both, active layer wetting up to four times or drying by 50%, depending on precipitation and soil type. Deciduous-dominated canopies reveal lower GSTs compared to evergreen stands, which will play an important factor in the spreading of evergreen taxa and permafrost persistence under warming conditions. Our study highlights that changing density and composition will significantly modify the thermal and hydrological state of the underlying permafrost. The induced soil changes will likely affect key forest functions such as the carbon pools and related feedback mechanisms such as swamping, droughts, fires, or forest loss.eng
dc.description.sponsorshipRussian Foundation for Basic Researchhttp://dx.doi.org/10.13039/501100002261
dc.description.sponsorshipBundesministerium für Bildung und Forschunghttp://dx.doi.org/10.13039/501100002347
dc.description.sponsorshipHelmholtz-Gemeinschafthttp://dx.doi.org/10.13039/501100001656
dc.description.sponsorshipH2020 European Research Councilhttp://dx.doi.org/10.13039/100010663
dc.description.sponsorshipNorges Forskningsrådhttp://dx.doi.org/10.13039/501100005416
dc.description.sponsorshipMinistry of Science and Higher Education of the Russian Federationhttp://dx.doi.org/10.13039/501100012190
dc.language.isoengnone
dc.publisherHumboldt-Universität zu Berlin
dc.rights(CC BY 4.0) Attribution 4.0 Internationalger
dc.rights.urihttps://creativecommons.org/licenses/by/4.0/
dc.subjectglobal warming impacteng
dc.subjectboreal foresteng
dc.subjectpermafrosteng
dc.subject.ddc577 Ökologienone
dc.titleSensitivity of ecosystem-protected permafrost under changing boreal forest structuresnone
dc.typearticle
dc.identifier.urnurn:nbn:de:kobv:11-110-18452/25774-1
dc.identifier.doi10.1088/1748-9326/ac153dnone
dc.identifier.doihttp://dx.doi.org/10.18452/25090
dc.type.versionpublishedVersionnone
local.edoc.container-titleEnvironmental research lettersnone
local.edoc.pages20none
local.edoc.type-nameZeitschriftenartikel
local.edoc.institutionMathematisch-Naturwissenschaftliche Fakultätnone
local.edoc.container-typeperiodical
local.edoc.container-type-nameZeitschrift
local.edoc.container-publisher-nameIOP Publ.none
local.edoc.container-publisher-placeBristolnone
local.edoc.container-volume16none
local.edoc.container-issue8none
local.edoc.container-year2021none
dc.description.versionPeer Reviewednone
local.edoc.container-articlenumber084045none
dc.identifier.eissn1748-9326

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