Abstract
Abstract. Mesoscale wind fluctuations on a time scale of tens of minutes to several hours lead to high wind power fluctuations. Enhanced mesoscale wind variability emerges during cold air outbreaks and resulting cellular convection. The study investigates spatial wind and solar variability and their correlation during cellular convection. Cellular convection leads to simultaneous high solar and wind variability, but the highest solar or wind variability occurs due to other meteorological phenomena.
Highlights
Mesoscale wind fields on a time scale of tens of minutes to several hours can be very variable above the North Sea
Around the 8 February 2009, the wind speed shows recurring wind speed changes. These wind fluctuations are in a wind speed range, where the power curve is steep
Vincent and Hahmann (2011), Heggem et al (1998) and others showed that a typical weather situation, which enhances mesoscale wind variability, are cold air outbreaks on the rear of low pressure systems
Summary
Around the 8 February 2009, the wind speed shows recurring wind speed changes. These wind fluctuations are in a wind speed range, where the power curve is steep. The wind fluctuations are transformed to very large power fluctuations. Vincent and Hahmann (2011), Heggem et al (1998) and others showed that a typical weather situation, which enhances mesoscale wind variability, are cold air outbreaks on the rear of low pressure systems. It is possible to simulate these fluctuations in mesoscale models (Vincent et al, 2012; Vincent, 2010)
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