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Multiscale Flow in complex terrain: The Perdigão ExperimentPICO session
Convener: R.J. Barthelmie  | Co-Conveners: Margarida Belo-Pereira , S.C. Pryor 
 / Thu, 12 Apr, 13:30–15:00  / PICO spot 5a
The Perdigão Experiment in Portugal is part of the New European Wind Atlas project that aims to bring new insight to understanding and quantifying all aspects of flow in complex terrain. The double ridge site at Perdigão has been extensively instrumented with a network of 49 meteorological masts and 29 lidars and other instruments for an extensive period from November 2016 to September 2017. The experiment is multinational involving about 80 scientists and engineers from Europe and the US. For six weeks in May-June an intensive experiment was conducted during which the larger network was supplemented with with tethersondes, radiosondes, UAVs, additional lidars, water vapor and acoustic measurements. In brief, it is the most comprehensive atmospheric measurement suite at the highest spatial resolution ever deployed on this scale. In tandem with the measurements, high resolution forecasts were provided and an extensive suite of numerical modeling will be undertaken.
In this session, we invite papers based on numerical simulations or experimental data that are focused on quantifying and understanding the flow in complex terrain with a specific focus on the Perdigão region. We invite contributions across all scales of motion from the microscale through mesoscale to the synoptic scale. The operation of and processing of lidar data in complex terrain is of particular interest as is comparison and use of the AROME and ECMWF forecasts during the experiment, but all relevant topics are welcome.