Nom du corpus

Corpus Systématique Végétale

Titre du document

Dynamics of the larch taigapermafrost coupled system in Siberia under climate change

Lien vers le document
Éditeur
IOP
Langue(s) du document
Anglais
Type de document
Article
Mots-clés d'auteur
  • taigapermafrost
  • vegetation model
  • soil hydrology
Nom du fichier dans la ressource
Syst_veg6_v2_005386
Auteur(s)
  • Ningning Zhang 1,2,3
  • Tetsuzo Yasunari 4,5
  • Takeshi Ohta 5,6
Affiliation(s)
  • 1) Graduate School of Environmental Studies, Nagoya University, Nagoya, Aichi 464-8601, Japan
  • 2) State Key Laboratory of Numerical Modeling for Atmospheric Sciences and Geophysical Fluid Dynamics, Institute of Atmospheric Sciences, Chinese Academy of Sciences, Beijing 100029, Peoples Republic of China
  • 3) Address for correspondence: State Key Laboratory of Numerical Modeling for Atmospheric Sciences and Geophysical Fluid Dynamics, Institute of Atmospheric Sciences, Chinese Academy of Sciences, Beijing 100029, Peoples Republic of China
  • 4) Hydrospheric Atmospheric Research Center, Nagoya University, Nagoya 464-8601, Japan
  • 5) Study Consortium for EarthLife Interactive Systems (SELIS) of Nagoya University, Nagoya, Japan
  • 6) Graduate School of Bioagricultural Sciences, Nagoya University, Nagoya, 464-8601, Japan
Résumé

Larch taiga, also known as Siberian boreal forest, plays an important role in global andregional waterenergycarbon (WEC) cycles and in the climate system. Recentin situ observations have suggested that larch-dominated taiga and permafrostbehave as a coupled eco-climate system across a broad boreal zone of Siberia.However, neither field-based observations nor modeling experiments have clarified thesynthesized dynamics of this system. Here, using a new dynamic vegetation modelcoupled with a permafrost model, we reveal the processes of interaction between thetaiga and permafrost. The model demonstrates that under the present climateconditions in eastern Siberia, larch trees maintain permafrost by controlling theseasonal thawing of permafrost, which in turn maintains the taiga by providingsufficient water to the larch trees. The experiment without permafrost processesshowed that larch would decrease in biomass and be replaced by a dominance ofpine and other species that suffer drier hydroclimatic conditions. In the coupledsystem, fire not only plays a destructive role in the forest, but also, in some cases,preserves larch domination in forests. Climate warming sensitivity experimentsshow that this coupled system cannot be maintained under warming of about2C or more. Under such conditions, a forest with typical boreal tree species (dark conifer anddeciduous species) would become dominant, decoupled from the permafrost processes. Thisstudy thus suggests that future global warming could drastically alter the larch-dominatedtaigapermafrost coupled system in Siberia, with associated changes of WEC processes andfeedback to climate.

Catégories INIST
  • 1 - sciences appliquees, technologies et medecines
  • 2 - sciences biologiques et medicales
  • 3 - sciences biologiques fondamentales et appliquees. psychologie
  • 4 - embryologie: invertebres et vertebres. teratologie
Catégories Scopus
  • 1 - Health Sciences ; 2 - Medicine ; 3 - Public Health, Environmental and Occupational Health
  • 1 - Physical Sciences ; 2 - Environmental Science ; 3 - General Environmental Science
  • 1 - Physical Sciences ; 2 - Energy ; 3 - Renewable Energy, Sustainability and the Environment
Catégories WoS
  • 1 - science ; 2 - meteorology & atmospheric sciences
  • 1 - science ; 2 - environmental sciences
Identifiant ISTEX
97886B795020E7E76FEA7CE4A6D36D360EC65B3D
Revue

Environmental Research Letters

Année de publication
2011
Présence de XML structuré
Oui
Score qualité du texte
8.436
Version PDF
1.4
Type de publication
Journal
ark:/67375/0T8-J9CMCCC6-Q
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