EGU23-15305
https://doi.org/10.5194/egusphere-egu23-15305
EGU General Assembly 2023
© Author(s) 2023. This work is distributed under
the Creative Commons Attribution 4.0 License.

Turbulent energy fluxes and surface energy balance closure of a coniferous forest at the complex-terrain site of Renon (Italian Alps)

Nadia Vendrame1, Martina Destro2,3, Mirco Rodeghiero1,4, Leonardo Montagnani5, and Dino Zardi1,2
Nadia Vendrame et al.
  • 1Center Agriculture Food Environment, University of Trento, San Michele all’Adige (TN), Italy
  • 2Department of Civil, Environmental and Mechanical Engineering, University of Trento, Trento, Italy
  • 3Department of Atmospheric and Cryospheric Sciences, University of Innsbruck, Innsbruck, Austria
  • 4Edmund Mach Foundation, San Michele all’Adige (TN), Italy
  • 5Faculty of Science and Technology, Free University of Bolzano, Bolzano, Italy

Exchanges of mass and energy between a subalpine coniferous forest and the atmosphere have been continuously monitored since few decades at Renon (Bolzano, Italy) applying the eddy covariance (EC) technique. The station is part of the Integrated Carbon Observation System (ICOS) EU Research Infrastructure. The area surrounding the site is characterized by complex topography, with a mean slope angle of about 11° and a Southward aspect. In this study, we focused on the analysis of turbulent energy fluxes (sensible and latent heat) and the energy budget closure of the forest during a period of about three months (August-October 2021), when a below-canopy EC system was additionally deployed to better understand the dynamics of turbulent exchanges. The energy balance closure was assessed for periods characterized by distinct wind circulation patterns (thermally-driven slope winds vs.  synoptic winds) and turbulent energy fluxes were processed applying different coordinate rotation methods (double rotation and planar fit). We found significant differences in the magnitude of sensible and latent heat fluxes computed with double rotation or planar fit. These differences were more marked during periods characterized by slope winds, suggesting a connection with local advection performed by these winds.

How to cite: Vendrame, N., Destro, M., Rodeghiero, M., Montagnani, L., and Zardi, D.: Turbulent energy fluxes and surface energy balance closure of a coniferous forest at the complex-terrain site of Renon (Italian Alps), EGU General Assembly 2023, Vienna, Austria, 24–28 Apr 2023, EGU23-15305, https://doi.org/10.5194/egusphere-egu23-15305, 2023.