Task 1.2 List of Field Campaigns

Creation of annual reports documenting and announcing field measurement programs and availability of data. 

  • Aim: to find new data useable for further NWP development, and to coordinate new measurement campaigns (e.g. New European Wind Atlas, WFIP2).

  • Partners: DWD, PNNL, DTU

April 12, 2017

Helmut Frank (DWD), Will Shaw (PNNL)

Field measurement programs in 2016


In IEA Wind Task 36 no experiments are made to compare Numerical Weather Prediction (NWP) models with observations. However, there are work packages trying to foster this comparison. Therefore, we compile a list of experiments which are particularly relevant for wind energy forecasting. We try to give a short description of the experiments and some information on the data. 

Major Field experiments in 2016

Wind Forecast Improvement Project 2 (WFIP 2) in Complex Flow

WFIP 2 (http://www.esrl.noaa.gov/gsd/renewable/wfip2.html) aims to improve NOAA's short-term weather forecast models and increase understanding of physical processes such as stability, turbulence, and low-level jet that affect wind energy generation in regions of complex terrain, such as coastlines, mountains, and canyons. The experiment takes place in the Columbia River Gorge area in the northwestern USA. The terrain includes mountains, canyons, and coastlines, and experiences a variety of complex flow including frontal passages, strong cross-barrier flow, mountain waves, topographic wakes, convective outflow, and marine pushes.

The field campaign started in fall 2015 and lasts 15 to 18 month running through the whole year 2016. Measurement instruments include Lidar, Sodar, wind profiler, surface meteorological stations, microbarographs, microwave radiometers. Partners are Vaisala, ESRL, PNNL, University of Colorado, NOAA, ARL, NREL. Measurements are taken by Vaisala, Project data are archived at the PNNL Data Archive and Portal (DAP), https://a2e.pnnl.gov/data/. Access to a lot of data is free after registration at https://a2e.energy.gov/.

Experiments in the New European Wind Atlas (NEWA)

The New European Wind Atlas (NWEA, http://www.neweuropeanwindatlas.eu/) will create a freely accessible wind atlas for Europe. To validate the models used for this project it includes several atmospheric flow experiments.  An overview of the experiments is given by Mann et al (2017). The experiments employ Doppler Lidar systems to supplement or replace meteorological masts. At the latest by the end of the New European Wind Atlas project all data will become freely available for the scientific community.

The coastal experiment RUNE (Floors et al, 2016) took place from November 2015 to February 2016 at the Danish west coast to measure offshore flow by wind lidar systems. It was followed by an experiment to investigate flow over heterogeneous roughness with horizontally scanning wind lidars. This experiment took place at the DTU test station for wind turbines at Østerild (http://rodeo.dtu.dk/rodeo/ProjectOverview.aspx?&Project=179&Rnd=975820) in northern Jutland, Denmark.

In another experiment, a ship-lidar system developed by Fraunhofer IWES, i.e. a Doppler lidar device installed on a vessel and supplemented by a motion monitoring and correction unit, is deployed to measure the wind along a regular ferry route between northern Germany and the Baltic countries across the Baltic Sea. A two-month test campaign took place in summer 2016 with measurements from the ferry between Bremerhaven and the island of Helgoland in the German North Sea.

Flow over forested rolling hills is investigated by the experiment in Hornamossen in south-central Sweden from April to July 2016. The site includes a variety of heterogeneisties in topography, land cover and forest height. Measurement are taken at a 180 m mast, several SODAR and two lidar systems.

Another experiment to measure flow over a forested hill is the NEWA Kassel Experiment from August to December 2016 in central Germany.  The experiment is centred around a 200 m tall tower on the Rödeser Berg. This tower is equipped with sonic and cup anemometers at several heights. In addition up to 11 long-range WindScanners, 8 wind profilers, and another 140 m mast measure the mean flow and turbulence. A predecessor was the Kassel 2016 Experiment (Pauscher et al, 2016).

Field experiments in 2017

WFIP 2 continues into 2017.

In February 2017 the main campaign of the ship-lidar experiment of Fraunhofer IWES within NEWA started on the route between Kiel, Germany,  and Klaipeda, Lithuania.

The big NEWA experiment will be the campaign in Perdigão, in central Portugal from January to June 2017. Several US universities and research institutes will join several European groups for this experiment. Serra do Perdigão is formed by two parallel ridges with Southeast-Northwest orientation, separated by circa 1.5 km, 4 km long and 500-550 m tall at their summit. A preparation for the large Perdigão experiment took place in May-June 2015 (see Mann et al., 2016).


J. Mann, N. Angelou, J. Arnqvist, D. Callies, E. Cantero, R. Chávez Arroyo, M. Courtney, J. Cuxart, E. Dellwik, J. Gottschall, S. Ivanell, P. Kühn, G. Lea, J. C. Matos, C. M. Veiga Rodrigues, J. M. L. M. Palma, L. Pauscher, A. Peña, J. Sanz Rodrigo, S. Söderberg and N. Vasiljevic. Complex terrain experiments in the New European Wind Atlas, Phil. Trans. R. Soc. A, 2017, 375. DOI:10.1098/rsta.2016.0101 (http://rsta.royalsocietypublishing.org/content/375/2091/20160101)

Mann J, Palma JMLM, Matos JC, Angelou N, Courtney M, Lea G, et al.. Experimental investigation of flow over a double ridge with several Doppler lidar systems; 2016. Available at http://ams.confex.com/ams/96Annual/webprogram/Paper284781.html. 96th American Meteorological Society Annual Meeting.

Floors, R.; Peña, A.; Lea, G.; Vasiljević, N.; Simon, E.; Courtney, M. The RUNE Experiment—A Database of Remote-Sensing Observations of Near-Shore Winds. Remote Sens. 2016, 8, 884.

Pauscher, L.; Vasiljevic, N.; Callies, D.; Lea, G.; Mann, J.; Klaas, T.; Hieronimus, J.; Gottschall, J.; Schwesig, A.; Kühn, M.; Courtney, M. An Inter-Comparison Study of Multi- and DBS Lidar Measurements in Complex Terrain. Remote Sens. 2016, 8, 782.

The authors thank Julia Gottschall from Fraunhofer IWES for contributions


Helmut Frank
DWD, Deutscher Wetterdienst


Will Shaw
Pacific North-West National Laboratory
16 DECEMBER 2018