What are the feedbacks between micrometeorology and hydrology on the scale of a small catchment?
PhD Researcher: Stephan Adam
Supervisors: Volker Wulfmeyer (University of Hohenheim), Andreas Behrendt (University of Hohenheim), Stéphane Bélair (Environment Canada)
Several, under hydrometeorological viewpoints interesting weather situations are used for case studies, for instance heavy rainfall in combination with floods, developing thunderstorms or droughts. The model runs are validated with high resolution measurements of the atmospheric moisture, temperature and wind speed made with lidar. Additionally, in-situ measurements like fluxes form Eddy-Covariance stations are applied for comparing the energy balance at the land surface. The soil hydrology is validated with soil moisture measurements. The model systems has been tested on its ability to simulate feedbacks with the atmosphere and modelling the water fluxes in the different compartments. To make the important fields describing the turbulent exchange in the lower troposphere as well as the budgets of water vapour, hydrometeors, the potential temperature and the three wind vectors accessible, an online scheme for higher moment statistics up to the fourth moment, as well as covariances for turbulent fluxes and an online budget scheme, which accumulates the transport and exchange terms in the model has been implemented.
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- Adam, S., Behrendt, A., Schwitalla, T., Hammann, E., Wulfmeyer, V. (2016): First Assimilation of Temperature Lidar Data into a Numerical Weather Prediction Model: Impact on the Simulation of the Temperature Field, Inversion Strength, and Planetary Boundary Layer Depth. Quarterly Journal of the Royal Meteorological Society, doi: 10.1002/qj.2875