The Høvsøre Tall Wind-Profile Experiment: A Description of Wind Profile Observations in the Atmospheric Boundary Layer

Ten Years of Boundary-Layer and Wind-Power Meteorology at Høvsøre, Denmark

“…These 'large-scale' winds provided further understanding of the observed vertical wind shear and wind turning at Høvsøre for a 1-yr lidar campaign; particularly close to the PBL height, baroclinity was found to significantly influence the wind at Høvsøre (Peña et al 2014a;Floors et al 2014). Floors et al (2013) used two roughness descriptions to simulate the flow at Høvsøre with the WRF model: the standard one based on MODIS land-cover data 2 and the other based on observations at Høvsøre (z o was computed similarly as shown in Sect.…”

“…They also found that the mean along-wind and transverse wind-speed components deviated from the simulated mean geostrophic components close to the PBL height but approached the geostrophic wind when considering baroclinity. On the basis of these findings the 'Høvsøre tall wind profile' cases were prepared and cover a range of stability, forcing and baroclinic conditions, which can be used to evaluate PBL models (Peña et al 2014a). Peña et al (2014b) used several of these cases to study the turning of the wind with height, and found that within the PBL and under barotropic conditions, the more stable the conditions the greater the wind at Høvsøre veered; under baroclinic conditions the wind could even turn anticlockwise.…”

“…Baroclinity has been found to play a significant role in the LLJ formation at Høvsøre; a decrease of the geostrophic wind speed with height causes a wind-speed maximum at low levels (Peña et al 2014a;Floors et al 2014). For a one-year lidar campaign, the easterly flow was on average highly baroclinic (due to a large temperature contrast between land and sea) with a geostrophic wind shear of −3 m s −1 km −1 and a jet at 600 m. WRF model simulations, made with two different PBL schemes at two different vertical resolutions, tended to underestimate the LLJ magnitude at Høvsøre compared with lidar observations up to 650 m for a four-week period in autumn 2010 ).…”

Addressing Spatial Variability of Surface-Layer Wind with Long-Range WindScanners

“…Today this picture is heavily challenged by remote sensing instruments, such as sodars and especially lidars (Emeis et al 2007). Whereas the mastmounted instruments (mainly sonics) are still superior when it comes to measuring and quantifying turbulent structures (Sathe et al 2011), the advantages of remote sensing instruments are obvious: easy deployment for campaigns with a flexible layout, a fixed coordinate system for profile studies (Berg et al 2013), measurements above the surface layer (Peña et al 2009), detailed wake studies (Bingöl et al 2010;Trujillo et al 2011;Smalikho et al 2013;Aitken et al 2014), offshore applications, (Peña et al 2010), etc.…”

Study on Wind Speed Distribution of Surface Layer

“…In Australia, there were 5 times the atmospheric boundary layer field observation experiment in 60 and 70s, of which the most famous is the Wangara atmospheric boundary layer experiment [4] , then the study reveals the ground height, the nocturnal boundary layer thickness and convective boundary layer structure and development process, Hicks studied the near surface wind profile the relationship by using Wangara data [5] . From April 2010 to March 2011, the Danish National Energy Laboratory Risoe [6] in HøVSøre coastal area flat farmland was carried out in a joint observation experiment, 6 layer ultrasonic anemometer mounted on the tower 100 meters high on the (10, 20, 40, 60, 80, 100 m) observation, 100 meters to 1200 meters using lidar, the interval of every 50 meters, wind profile obtained were similar with gradient wind profile and geostrophic wind profiles simulated by the WRF model (The Weather Research and Forecasting Model) .…”