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Preprints
https://doi.org/10.5194/essd-2020-153
© Author(s) 2020. This work is distributed under
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/essd-2020-153
© Author(s) 2020. This work is distributed under
the Creative Commons Attribution 4.0 License.

  10 Aug 2020

10 Aug 2020

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A revised version of this preprint was accepted for the journal ESSD and is expected to appear here in due course.

Winter atmospheric boundary layer observations over sea ice in the coastal zone of the Bothnian Bay (Baltic Sea)

Marta Wenta1, David Brus2, Konstantinos Doulgeris2, Ville Vakkari2, and Agnieszka Herman1 Marta Wenta et al.
  • 1University of Gdansk, Institute of Oceanography, al. Marszałka Piłsudskiego 46, 81 - 378 Gdynia, Poland
  • 2Finnish Meteorological Institute, FI-00101 Helsinki, Finland

Abstract. The Hailuoto Atmospheric Observations over Sea ice (HAOS) campaign took place at the westernmost point of Hailuoto island (Finland) between 27 February and 2 March 2020. The aim of the campaign was to obtain atmospheric boundary layer (ABL) observations over seasonal sea ice in the Bay of Bothnia. Throughout 4 days both fixed-wing and quad-propeller rotorcraft unmanned aerial vehicles (UAV) were deployed over the sea ice to measure the properties of the lower ABL and to obtain accompanying high-resolution aerial photographs of the underlying ice surface. Additionally, a 3D sonic anenometer, an automatic weather station and a Halo Doppler lidar were installed on the shore to collect meteorological observations. During the UAV flights, measurements of temperature, relative humidity and atmospheric pressure were collected at 4 different altitudes between 25 m and 100 m, over an area of ~ 1.5 km2 of sea ice, located 1.1–1.3 km offshore from the Hailuoto Marjaniemi pier, together with orthomosaic maps of the ice surface below. Altogether the obtained dataset consists of 27 meteorological flights, 4 photogrammetry missions and continuous measurements of atmospheric properties from ground-based stations located at the coast. The acquired observations have been quality controlled and post processed and are available through the PANGAEA repository (https://doi.pangaea.de/10.1594/PANGAEA.918823, Wenta et al., 2020).

Marta Wenta et al.

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Marta Wenta et al.

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Winter atmospheric boundary layer observations over sea ice in the coastal zone of the Bothnian Bay (Baltic Sea). Wenta, Marta; Brus, David; Doulgeris, Konstantinos-Matthaios; Vakkari, Ville; Herman, Agnieszka https://doi.org/10.1594/PANGAEA.918823

Marta Wenta et al.

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Short summary
Representation of atmospheric boundary layer (ABL) over sea ice is a challenge for numerical weather prediction (NWP) models. To increase our understanding of the relevant processes a field campaign was carried out over the sea ice in the Baltic Sea on 27 Feb.–2 Mar. 2020. Observations included 27 UAV flights, 4 photogrammetry missions and continuous, shore based automatic weather station and LIDAR wind measurements. Obtain dataset is used for the validation of models results.
Representation of atmospheric boundary layer (ABL) over sea ice is a challenge for numerical...
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