Assessing the performance of the community terrestrial system model in simulating arctic permafrost ...

• Main Author: Damseaux, Adrien
• Format: Article in Journal/Newspaper
• Language: unknown
• Published: GFZ German Research Centre for Geosciences 2023
• Subjects: Arctic; Active layer monitoring; Active layer thickness; Circumpolar Active Layer Monitoring Network; Climate change; permafrost
• Online Access: https://dx.doi.org/10.57757/iugg23-0484; https://gfzpublic.gfz-potsdam.de/pubman/item/item_5015922

<!--!introduction!--> Our study aims to evaluate the performance of the Community Terrestrial System Model (CTSM) in simulating Arctic permafrost areas. We compare (1) soil temperatures against an extensive network of 554 in-situ stations, (2) the active layer thickness against the Circumpolar Active Layer Monitoring Network (CALM), and (3) soil temperatures, the active layer thickness, and the permafrost extent against the grid-based product from the ESA Climate Change Initiative covering 1980 to 2021. To overcome the limitation of using average depth to assess land models, we introduce a new interpolation method called Partial Curve Mapping. Unlike traditional methods, this approach allows us to evaluate the land model without losing the soil depth variability, which we find essential to accurately assess any land model's capabilities. In addition, we run the model in three different configurations. The first is the (1) default mode with ERA5 atmospheric forcings. The second is the (2) GSWP3 mode ... : The 28th IUGG General Assembly (IUGG2023) (Berlin 2023) ...