Land–atmosphere interactions in sub-polar and alpine climates in the CORDEX Flagship Pilot Study Land Use and Climate Across Scales (LUCAS) models – Part 2: The role of changing vegetation - Archive ouverte HAL Accéder directement au contenu
Article Dans Une Revue The Cryosphere Année : 2022

Land–atmosphere interactions in sub-polar and alpine climates in the CORDEX Flagship Pilot Study Land Use and Climate Across Scales (LUCAS) models – Part 2: The role of changing vegetation

Priscilla Mooney
Diana Rechid
  • Fonction : Auteur
Edouard Davin
Eleni Katragkou
Marcus Breil
  • Fonction : Auteur
Rita Cardoso
Anne Sophie Daloz
Peter Hoffmann
Daniela Lima
  • Fonction : Auteur
Ronny Meier
Pedro Soares
Giannis Sofiadis
Susanna Strada
Gustav Strandberg
Merja Toelle
Marianne Lund
Anne Daloz

Résumé

Abstract. Land cover in sub-polar and alpine regions of northern and eastern Europe have already begun changing due to natural and anthropogenic changes such as afforestation. This will impact the regional climate and hydrology upon which societies in these regions are highly reliant. This study aims to identify the impacts of afforestation/reforestation (hereafter afforestation) on snow and the snow-albedo effect and highlight potential improvements for future model development. The study uses an ensemble of nine regional climate models for two different idealised experiments covering a 30-year period; one experiment replaces most land cover in Europe with forest, while the other experiment replaces all forested areas with grass. The ensemble consists of nine regional climate models composed of different combinations of five regional atmospheric models and six land surface models. Results show that afforestation reduces the snow-albedo sensitivity index and enhances snowmelt. While the direction of change is robustly modelled, there is still uncertainty in the magnitude of change. The greatest differences between models emerge in the snowmelt season. One regional climate model uses different land surface models which shows consistent changes between the three simulations during the accumulation period but differs in the snowmelt season. Together these results point to the need for further model development in representing both grass–snow and forest–snow interactions during the snowmelt season. Pathways to accomplishing this include (1) a more sophisticated representation of forest structure, (2) kilometre-scale simulations, and (3) more observational studies on vegetation–snow interactions in northern Europe.
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hal-03657399 , version 1 (03-05-2022)

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Priscilla Mooney, Diana Rechid, Edouard Davin, Eleni Katragkou, Natalie de Noblet-Ducoudré, et al.. Land–atmosphere interactions in sub-polar and alpine climates in the CORDEX Flagship Pilot Study Land Use and Climate Across Scales (LUCAS) models – Part 2: The role of changing vegetation. The Cryosphere, 2022, 16 (4), pp.1383 - 1397. ⟨10.5194/tc-16-1383-2022⟩. ⟨hal-03657399⟩
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