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. By their very nature, wind and solar power, as well as hydro, tidal, wave and other weather dependent renewable forms of generation are dependent on weather and climate. Modelling and measurement for resource assessment, site selection and operational forecasting for horizons ranging from decades to minutes are of paramount importance.
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 in offshore regions that are difficult to model and measure. 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.
Of particular interest these days is the field of urban meteorology applied to the renewable energy sector. The urban energy field is quite new, but there are several “Smart Cities” and “Smart Grids” projects in Europe focusing on urban measurement development for forecasts or resource mapping.

We invite contributions on all aspects of weather dependent renewable power generation, especially:
• Wind conditions (both resources and loads) on short and long time scales for wind power development, especially in complex environments (e.g. mountains, forests, coastal or urban).
• Wind and solar resource and atlases.
• Wake effect models and measurements, especially for large wind farms and offshore.
• Performance and uncertainties of forecasts of renewable power at different time horizons and in different external conditions.
• Forecast of extreme wind events and wind ramps.
• Local, regional and global impacts of renewable energy power plants or of large-scale integration.
• Dedicated wind measurement techniques (SODARS, LIDARS, UAVs etc.).
• Dedicated solar measurement techniques (radiation, aerosol, cloud cover etc.) from ground-based and space-borne remote sensing.
• Tools for urban area renewable energy supply strategic planning and control.