Wind and solar power are the predominant new sources of electrical power in recent years. Solar power reached a milestone of providing 50 % of demand in Germany during one hour in 2012, and wind power occasionally exceeds 100 % of demand in Denmark. This kind of explosive growth is likely to continue in the near future. By their very nature, wind and solar power are dependent on weather and climate. Modelling and measurement of both for resource assessment, site selection and operational forecasting for minutes-days time horizon are of paramount importance for the success of wind and solar power integration.
The success of wind power means that wind turbines are increasingly put in sites with complex terrain or forests, with towers extending beyond the strict logarithmic profile and offshore regions that are difficult to model and where data are scarcer. Major challenges for solar power are accurate measurements and the short-term prediction of the spatiotemporal evolution of the cloud field. For both solar and wind power, the integration of large amounts of renewable energy into the grid is another critical research problem due to the uncertainties linked to their forecast.
We therefore invite contributions in the following areas:
• Wind conditions (both resources and loads) on short and long time scales for wind power development.
• Solar resource and solar atlas.
• Wind conditions in complex terrain (mountains, forests and coastal).
• Wake effects, especially for large wind farms and offshore.
• Performance and uncertainties of forecasts of wind or solar power at different time horizons and in different external conditions.
• Forecast of extreme wind events and wind ramps.
• Effects of large-scale integration of wind and solar power.
• Local, regional and global impacts of renewable energy power plants.
• Dedicated wind measurement techniques (SODARS, LIDARS, UAVs etc.).
• Dedicated solar measurement techniques (radiation, aerosol, cloud cover etc.).

Any abstract related to other weather dependent renewable energy generation (e.g. wave power, tidal or hydro) will also be considered.