| Title: |
Improvements of a subcanopy snow model conveyed by observations from a mid-altitude alpine site |
| Authors: |
Pauze, Thomas; Bouchet, Axel; Boone, Aaron; Lafaysse, Matthieu; Fructus, Mathieu; Rivière, Agnès; Lejeune, Yves; Gouttevin, Isabelle |
| Contributors: |
Centre d’Etudes de la Neige – Centre National de Recherches Météorologiques, observatoire des sciences de l’univers de Grenoble, Université Grenoble Alpes – France; Centre d'Etudes de la Neige (CEN); Centre national de recherches météorologiques (CNRM); Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Communauté d'universités et établissements de Toulouse (Comue de Toulouse)-Météo-France-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Communauté d'universités et établissements de Toulouse (Comue de Toulouse)-Météo-France-Observatoire des Sciences de l'Univers de Grenoble (Fédération OSUG)-Université Grenoble Alpes (UGA); Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Communauté d'universités et établissements de Toulouse (Comue de Toulouse)-Météo-France; Météo-France; Centre de Géosciences (GEOSCIENCES); Mines Paris - PSL (École nationale supérieure des mines de Paris); Université Paris Sciences et Lettres (PSL)-Université Paris Sciences et Lettres (PSL) |
| Source: |
eLTER-France OZCAR - Observatoires de la Zone Critique, Applications et Recherche Research infrastructure ; https://minesparis-psl.hal.science/hal-05415914 ; eLTER-France OZCAR - Observatoires de la Zone Critique, Applications et Recherche Research infrastructure, Sep 2025, PARIS, France ; https://nextcloud.inrae.fr/s/Qw5ad3fRjyE5Piz?dir=/&editing=false&openfile=true |
| Publisher Information: |
CCSD |
| Publication Year: |
2025 |
| Collection: |
Université Grenoble Alpes: HAL |
| Subject Terms: |
Mountain Aquifer; Alpe; snow; Col de Porte; OZCAR; [SDU.STU.HY]Sciences of the Universe [physics]/Earth Sciences/Hydrology; [SDU.STU.CL]Sciences of the Universe [physics]/Earth Sciences/Climatology |
| Subject Geographic: |
PARIS; France |
| Description: |
International audience ; In the Alpine region, forests cover about 2/3 of the ground, yet surface and/or snow models designed forhydrological applications, often represent them in a very coarse way.In the current study, we present and evaluate new developments in the physics-based ISBA/MEB-Crocusmodel that enables a detailed representation of snow cover and processes in interaction with an above-lying1-layer canopy and atmosphere, and with a litter layer on top of the ground. While the canopy represen-tation within this model demonstrated an added value for climate modeling, due to a better representationof snowpack in subarctic regions characterised by boreal forests, ISBA/MEB-Crocus failed to reproduce theobserved snowpack at a mid-altitude alpines forest site, systematically overestimating the snowpack in termsof depth and duration.With a view of correcting for these biases, we use detailed snowpack and meteorological measurementsavailable at the Col de Porte research site in the Chartreuse massif, France, at both open and forested sites.In addition to conventional measures, the air temperatures in the canopy at 22 m and 32m and transectof sub-canopy snow depth, to represent spatial variability, are recorded. LiDAR data are also available todescribe forest parameters.The use of this dataset enables the improvement of the MEB-Crocus model for alpine forests. This enhance-ment is achieved through an adaptation of the interception scheme, a revision of the melt parametrizationfor intercepted snow, and of the unloading scheme. The meteorological forcing is also adapted to alignwith the top-of-canopy conditions. We demonstrate that these adjustements enable the snowpack model toreplicates the observations for the Col de Porte forest site without degrading the results for Artic regions.Furthermore, we characterize the influence of the various parameters employed for the representation of theforest and their physical consistency.This detailed, point-scale evaluation paves the way for the use of this model for ... |
| Document Type: |
conference object |
| Language: |
English |
| Availability: |
https://minesparis-psl.hal.science/hal-05415914 |
| Accession Number: |
edsbas.1D3968E0 |
| Database: |
BASE |