The importance of interactions between snow, permafrost and vegetation dynamics in affecting terrestrial carbon balance in circumpolar regions, 2022-2100 ...

• Main Authors: Xu, Yiming, Zhuang, Qianlai
• Format: Dataset
• Language: English
• Published: NSF Arctic Data Center 2023
• Subjects: permafrost; carbon dynamics; ecosystem modeling; land surface process
• Online Access: https://dx.doi.org/10.18739/a2dj58j2r; https://arcticdata.io/catalog/view/doi:10.18739/A2DJ58J2R

Permafrost dynamics can drastically affect vegetation and soil carbon dynamics in northern high latitudes. Vegetation has significant influences on the energy balance of soil surface by impacting the short-wave radiation, long-wave radiation and surface sensible heat flux, affecting soil thermal dynamics, in turn, inducing vegetation shift, affecting carbon cycling. During winter, snow can also significantly impact soil temperature due to its insulative effect. However, these processes have not been fully modeled to date. To quantify the interactions between vegetation, snow, and soil thermal dynamics and their impacts on carbon dynamics over the circumpolar region (45–90◦ N), we revise a sophisticated ecosystem model to improve simulations of soil temperature profile and their influences on vegetation, ecosystem carbon pools and fluxes. We find that, with warmer soil temperature in winter and cooler soil temperature in summer simulated with the revised model considering vegetation shift and snow effects, ...