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

DOI

Presence of sea ice in the Bay of Bothnia affects the intensity of moisture and heat exchange between the atmosphere and the sea, and the radiation budget in the region. Depending on the sea ice extent it affects weather both locally and globally. The goal of Hailuoto Atmospheric Observations over Sea Ice (HAOS) campaign was to collect measurements of atmospheric boundary layer properties over the sea ice in the coastal zone west of the Hailuoto island (north-eastern Bay of Bothnia) and to increase our understanding of the processes at the interface of sea ice and air. The observations took place between 27 of February and 2 of March 2020 and included 27 fixed-wing unmanned aerial vehicle (UAV) flights at the heights of 25, 50, 75 and 100 m over the survey area of 1.5 km2, along with 4 photogrammetry missions over the sea ice below the fixed wing UAV path. The atmospheric properties measured during the flights were temperature, relative humidity and air pressure while the aerial photography was used to generate orthomosaic maps. The campaign also involved continuous observations with a ground based weather station, a 3D anemometer, and a Halo Doppler Lidar installed on the shore, at the pier of the Hailuoto Marjaniemi harbour. Data collected by two meteorological sensors installed on the fixed wing UAV include, apart from meteorological conditions: date,time, latitude, longitude, UTM coordinates, altitude. The part of the data collected outside of the prescribed trajectories (i.e. directly after take-off/before landing) has been removed during preprocessing and the altitude has been calculated using a hypsometric equation. The orthomosaic maps are provided as GeoTiff, Google Maps tiles and KML files in WGS84 (EGM 96 Geoid) Coordinate System. Weather station measurements include (logged as 1-minute averages): date and time, minimum wind direction (deg), averaged wind direction (deg), maximum wind direction (deg), minimum wind speed (m.s-1), averaged wind speed (m.s-1), maximum wind speed (m.s-1), temperature (C), relative humidity (%), pressure (hPa). The 3D anemometer dataset contains three wind speed components (u, v, w in 10-2 m.s-1) and acoustic temperature (10-2 °C) in 10 Hz resolution. The post-processed Halo Doppler Lidar measurements of radial velocity and retrieved parameters of horizontal wind speed and direction, TKE dissipation rate and turbulence proxy are provided in netCDFformat.

Identifier
DOI https://doi.org/10.1594/PANGAEA.918823
Metadata Access https://ws.pangaea.de/oai/provider?verb=GetRecord&metadataPrefix=datacite4&identifier=oai:pangaea.de:doi:10.1594/PANGAEA.918823
Provenance
Creator Wenta, Marta (ORCID: 0000-0001-7264-820X); Brus, David; Doulgeris, Konstantinos-Matthaios; Vakkari, Ville; Herman, Agnieszka ORCID logo
Publisher PANGAEA
Publication Year 2020
Rights Creative Commons Attribution 4.0 International; https://creativecommons.org/licenses/by/4.0/
OpenAccess true
Representation
Language English
Resource Type Bundled Publication of Datasets; Collection
Format application/zip
Size 66 datasets
Discipline Earth System Research
Spatial Coverage (24.495W, 65.026S, 24.555E, 65.052N)
Temporal Coverage Begin 2020-02-27T11:10:00Z
Temporal Coverage End 2020-03-02T11:32:30Z