Marius Lambert

• Lambert, Marius; Tang, Hui; Aas, Kjetil Schanke; Stordal, Frode; Fisher, Rosie & Bjerke, Jarle Werner [Show all 8 contributors for this article] (2023). Integration of a Frost Mortality Scheme Into the Demographic Vegetation Model FATES. Journal of Advances in Modeling Earth Systems. ISSN 1942-2466. 15(7). doi: 10.1029/2022MS003333. Full text in Research Archive
• Lambert, Marius; Tang, Hui; Aas, Kjetil Schanke; Stordal, Frode; Fisher, Rosie & Fang, Yilin [Show all 8 contributors for this article] (2022). Inclusion of a cold hardening scheme to represent frost tolerance is essential to model realistic plant hydraulics in the Arctic-boreal zone in CLM5.0-FATES-Hydro. Geoscientific Model Development. ISSN 1991-959X. 15(23), p. 8809–8829. doi: 10.5194/gmd-15-8809-2022. Full text in Research Archive Show summary

  As temperatures decrease in autumn, vegetation of temperate and boreal ecosystems increases its tolerance to freezing. This process, known as hardening, results in a set of physiological changes at the molecular level that initiate modifications of cell membrane composition and the synthesis of anti-freeze proteins. Together with the freezing of extracellular water, anti-freeze proteins reduce plant water potentials and xylem conductivity. To represent the responses of vegetation to climate change, land surface schemes increasingly employ “hydrodynamic” models that represent the explicit fluxes of water from soil and through plants. The functioning of such schemes under frozen soil conditions, however, is poorly understood. Nonetheless, hydraulic processes are of major importance in the dynamics of these systems, which can suffer from, e.g., winter “frost drought” events. In this study, we implement a scheme that represents hardening into CLM5.0-FATES-Hydro. FATES-Hydro is a plant hydrodynamics module in FATES, a cohort model of vegetation physiology, growth, and dynamics hosted in CLM5.0. We find that, in frozen systems, it is necessary to introduce reductions in plant water loss associated with hardening to prevent winter desiccation. This work makes it possible to use CLM5.0-FATES-Hydro to model realistic impacts from frost droughts on vegetation growth and photosynthesis, leading to more reliable projections of how northern ecosystems respond to climate change.

• Lambert, Marius; Kittel, Christoph; Damseaux, Adrien & Fettweis, Xavier (2019). Sensitivity of arctic surface temperatures to sea ice thickness changes using the regional climate model mar. Bulletin - Société géographique de Liège. ISSN 0770-7576. 73, p. 131–137. doi: 10.25518/0770-7576.5968.

View all works in Cristin

• Lambert, Marius; Tang, Hui; Aas, Kjetil Schanke; Stordal, Frode; Bjerke, Jarle Werner & Fisher, Rosie [Show all 10 contributors for this article] (2023). Winter survival of vegetation in the Arctic-boreal region: Integrating cold hardiness and frost mortality schemes into CLM-FATES.
• Aas, Kjetil Schanke; Lambert, Marius; Tang, Hui; Althuizen, Inge; Berntsen, Terje Koren & Fisher, Rosie [Show all 11 contributors for this article] (2022). Recent high-latitude vegetation developments in CLM-FATES.
• Lambert, Marius; Aas, Kjetil Schanke; Tang, Hui; Stordal, Frode & Parmentier, Frans-Jan (2021). Modelling insights into the effects of hardening during extreme winter root water release.
• Lambert, Marius (2021). Grønt eller brunt? Uforutsigbar fremtid i Arktis. Naturen. ISSN 0028-0887. 145(5), p. 226–229. doi: 10.18261/issn.1504-3118-2021-05-03.

View all works in Cristin