title: Complex terrain experiments in the New European Wind Atlas.
abstract: The New European Wind Atlas project will create a freely accessible wind atlas covering Europe and Turkey, develop the model chain to create the atlas and perform a series of experiments on flow in many different kinds of complex terrain to validate the models. This paper describes the experiments of which some are nearly completed while others are in the planning stage. All experiments focus on the flow properties that are relevant for wind turbines, so the main focus is the mean flow and the turbulence at heights between 40 and 300 m. Also extreme winds, wind shear and veer, and diurnal and seasonal variations of the wind are of interest. Common to all the experiments is the use of Doppler lidar systems to supplement and in some cases replace completely meteorological towers. Many of the lidars will be equipped with scan heads that will allow for arbitrary scan patterns by several synchronized systems. Two pilot experiments, one in Portugal and one in Germany, show the value of using multiple synchronized, scanning lidar, both in terms of the accuracy of the measurements and the atmospheric physical processes that can be studied. The experimental data will be used for validation of atmospheric flow models and will by the end of the project be freely available.This article is part of the themed issue 'Wind energy in complex terrains'.
authors.affiliation: Technical University of Denmark, Roskilde, Denmark jmsq@dtu.dk.
authors.forename: J
authors.identifier: http://orcid.org/0000-0002-6096-611X
authors.initials: J
authors.lastname: Mann
authors.affiliation: Technical University of Denmark, Roskilde, Denmark.
authors.forename: N
authors.initials: N
authors.lastname: Angelou
authors.affiliation: Uppsala University, Uppsala, Sweden.
authors.forename: J
authors.identifier: http://orcid.org/0000-0002-5443-3173
authors.initials: J
authors.lastname: Arnqvist
authors.affiliation: Fraunhofer Institute for Wind Energy and Energy System Technology IWES, Germany.
authors.forename: D
authors.initials: D
authors.lastname: Callies
authors.affiliation: National Renewable Energy Centre (CENER), Sarriguren, Spain.
authors.forename: E
authors.initials: E
authors.lastname: Cantero
authors.affiliation: National Renewable Energy Centre (CENER), Sarriguren, Spain.
authors.forename: R Chávez
authors.initials: RC
authors.lastname: Arroyo
authors.affiliation: Technical University of Denmark, Roskilde, Denmark.
authors.forename: M
authors.initials: M
authors.lastname: Courtney
authors.affiliation: Universitat de les Illes Balears, Mallorca, Spain.
authors.forename: J
authors.initials: J
authors.lastname: Cuxart
authors.affiliation: Technical University of Denmark, Roskilde, Denmark.
authors.forename: E
authors.initials: E
authors.lastname: Dellwik
authors.affiliation: Fraunhofer Institute for Wind Energy and Energy System Technology IWES, Germany.
authors.forename: J
authors.initials: J
authors.lastname: Gottschall
authors.affiliation: Uppsala University, Uppsala, Sweden.
authors.forename: S
authors.initials: S
authors.lastname: Ivanell
authors.affiliation: Fraunhofer Institute for Wind Energy and Energy System Technology IWES, Germany.
authors.forename: P
authors.initials: P
authors.lastname: Kühn
authors.affiliation: Technical University of Denmark, Roskilde, Denmark.
authors.forename: G
authors.initials: G
authors.lastname: Lea
authors.affiliation: Instituto de Ciência e Inovação em Engenharia Mecânica e Gestão Industrial (INEGI), Porto, Portugal.
authors.forename: J C
authors.initials: JC
authors.lastname: Matos
authors.affiliation: Faculdade de Engenharia da Universidade do Porto (FEUP), Porto, Portugal.
authors.forename: J M L M
authors.initials: JM
authors.lastname: Palma
authors.affiliation: Fraunhofer Institute for Wind Energy and Energy System Technology IWES, Germany.
authors.forename: L
authors.identifier: http://orcid.org/0000-0003-3096-5674
authors.initials: L
authors.lastname: Pauscher
authors.affiliation: Technical University of Denmark, Roskilde, Denmark.
authors.forename: A
authors.initials: A
authors.lastname: Peña
authors.affiliation: National Renewable Energy Centre (CENER), Sarriguren, Spain.
authors.forename: J Sanz
authors.initials: JS
authors.lastname: Rodrigo
authors.affiliation: WeatherTech Scandinavia AB, Uppsala, Sweden.
authors.forename: S
authors.initials: S
authors.lastname: Söderberg
authors.affiliation: Technical University of Denmark, Roskilde, Denmark.
authors.forename: N
authors.initials: N
authors.lastname: Vasiljevic
authors.affiliation: Faculdade de Engenharia da Universidade do Porto (FEUP), Porto, Portugal.
authors.forename: C Veiga
authors.initials: CV
authors.lastname: Rodrigues
keywords: Doppler lidar; complex terrain; meteorological experiment