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

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Abstract

We present an analysis of data from a nearly 1-year measurement campaign performed at Høvsøre, Denmark, a coastal farmland area where the terrain is flat. Within the easterly sector upstream of the site, the terrain is nearly homogenous. This topography and conditions provide a good basis for the analysis of vertical wind-speed profiles under a wide range of atmospheric stability, turbulence, and forcing conditions. One of the objectives of the campaign was to serve as a benchmark for flow over flat terrain models. The observations consist of combined wind lidar and sonic anemometer measurements at a meteorological mast. The sonic measurements cover the first 100 m and the wind lidar measures above 100 m every 50 m in the vertical. Results of the analysis of observations of the horizontal wind-speed components in the range 10–1200 m and surface turbulence fluxes are illustrated in detail, combined with forcing conditions derived from mesoscale model simulations. Ten different cases are presented. The observed wind profiles approach well the simulated gradient and geostrophic winds close to the simulated boundary-layer height during both barotropic and baroclinic conditions, respectively, except for a low-level jet case, as expected. The simulated winds are also presented for completeness and show good agreement with the measurements, generally underpredicting the turning of the wind in both barotropic and baroclinic cases.

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Notes

  1. http://veaonline.risoe.dk/tallwind/cases/coordinate_system.png.

  2. http://veaonline.risoe.dk/tallwind/cases/Hovsore.png.

  3. http://veaonline.risoe.dk/tallwind/cases/windlidar.png.

  4. http://veaonline.risoe.dk/tallwind/cases/wrfmodel.png.

  5. http://veaonline.risoe.dk/tallwind/cases/lidar_sonic.png.

  6. http://veaonline.risoe.dk/tallwind/tallwindcases.html.

  7. http://veaonline.risoe.dk/tallwind/cases/case1.txt.

  8. http://veaonline.risoe.dk/tallwind/cases/case2.txt.

  9. http://veaonline.risoe.dk/tallwind/cases/case3.txt.

  10. http://veaonline.risoe.dk/tallwind/cases/case4.txt.

  11. http://veaonline.risoe.dk/tallwind/cases/case5.txt.

  12. http://veaonline.risoe.dk/tallwind/cases/case6.txt.

  13. http://veaonline.risoe.dk/tallwind/cases/case7.txt.

  14. http://veaonline.risoe.dk/tallwind/cases/case8.txt.

  15. http://veaonline.risoe.dk/tallwind/cases/case9.txt.

  16. http://veaonline.risoe.dk/tallwind/cases/case10.txt.

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Acknowledgments

Funding from the Danish Council for Strategic Research Project Number 2104-08-0025 “Tall Wind” project is acknowledged. We would also like to thank the Test and Measurements section of DTU Wind Energy for the maintenance of the Høvsøre database.

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Authors and Affiliations

  1. DTU Wind Energy, Technical University of Denmark, Risø Campus, Frederiksborgvej 399, 4000 , Roskilde, Denmark

    Alfredo Peña, Rogier Floors & Sven-Erik Gryning

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  1. Alfredo Peña
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  2. Rogier Floors
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  3. Sven-Erik Gryning
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Correspondence to Alfredo Peña.

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Peña, A., Floors, R. & Gryning, SE. The Høvsøre Tall Wind-Profile Experiment: A Description of Wind Profile Observations in the Atmospheric Boundary Layer. Boundary-Layer Meteorol 150, 69–89 (2014). https://doi.org/10.1007/s10546-013-9856-4

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