Research School for Socio-Economic and
Natural Sciences of the Environment
Research School for Socio-Economic and
Natural Sciences of the Environment
Agenda

Xabier Pedruzo Bagazgoitia

Date: 06 December 2019
Time: 11:00 - 13:00

Dissertation title: 

On the interactions between clouds, radiation, turbulence and vegetation in the atmospheric boundary layer

Group: Wageningen University
Promotor: Prof. Dr. Jordi Vilà – Guerau de Arellano

Extra information:

 
Abstract:

The vegetation and the boundary-layer clouds interact within the boundary layer. Radiation and turbulence are the main mechanisms through which these interactions take place. The vegetation adjusts the photosynthesis rates depending on the environmental conditions including radiation. Photosynthesis also determines the amount of water vapor entering the atmosphere at surface, as plants exchange CO2 and water vapor through their stomata. Thus, vegetation regulates the surface fluxes, i.e. the latent heat and sensible heat flux at the lower boundary of the boundary layer. This inevitably affects the turbulent conditions at boundary layer and clouds. We investigate these effects on a wide range of cases. We assess whether these interactions can be represented through parameterizations. Furthermore, we investigate the role of the surface in shallow cumulus and stratocumulus-topped boundary layers. Finally, we research whether a three-dimensional radiative scheme modifies the surface responses and dynamics of the boundary layer with shallow cumulus.