Temperature and wind profiles measured with UAS and lidar during TEAMx wEOP at Hochhäuser in the Inn Valley, Austria

This dataset contains vertical profiles of temperature and wind speed up to 100 m above ground level (AGL), collected above a steep, snow-covered, north-facing slope near the "i-Box Hochhäuser" weather station in the Inn Valley, Austria (https://acinn-data.uibk.ac.at/pages/i-box-hochhaeuser.html), at 47.28764°N, 11.63120°E, 1009 m MSL. Temperature profiles were measured with an uncrewed aircraft system (UAS) and four near-surface sensors. The data are provided in NetCDF format with separate files for each of the five Intensive Observation Periods (IOP). Wind profiles were collected with a Doppler wind lidar and averaged over 10 minutes. Additionally, the raw data are included as csv files. The data were collected in the framework of the winter EOP of TEAMx (https://www.teamx-programme.org) and analysed in the Bachelor's thesis of Simon Widy at the University of Innsbruck (Widy 2025) under the supervision of Alexander Gohm.

Temperature profiles (iopXX_uasprofiles.nc)

Temperature measurements were conducted on five days with relatively weak synoptic forcing during the TEAMx wEOP in winter 2025. Profiles were obtained using an iMet-XQ2 sensor mounted on a DJI Mavic Mini 2 UAS and supplemented by four near-surface HOBO temperature loggers (three MX2302 sensors with RS3-B radiation shield and one MX2201 for surface temperature).

Due to the limited accuracy of the iMet-XQ2 altitude measurements, reference heights for the UAS profiles were determined by aligning airborne and near-surface temperature data. Moreover, temperature values below 2 m AGL were taken purely from the HOBO loggers and above 2 m AGL from the iMet-XQ2. For further information on the method and calculation processes, see the file readme.pdf provided in this repository.

Temperature profile files include the following variables:

• Height (m AGL)

• Profile number

• UAS-ascent start and end times (date and time in UTC)

• Temperature profile (°C)

• Potential temperature profile (°C)

• Pressure (hPa)

• Linear temperature profile of the ambient atmosphere (°C)

• Brunt-Väisälä frequency of the ambient atmosphere (1/s)

Wind profiles (wr_averaged.nc)

Wind measurements were obtained using a Doppler wind lidar (METEK Wind Ranger 200) and averaged over 10 minutes. The Wind Ranger measured at 14 height levels between 7 and 200 m AGL. Additional wind measurements for lower heights (1.5, 2.6, 5.3 m AGL) can be found in the i-Box data files.

The wind file includes Wind Ranger measurements of selected IOP days:

• Height (m AGL)

• Date and time (UTC)

• VEL: wind speed in m/s

• DIR: wind direction

• descriptions for all other variables are in the metadata of the NetCDF

Raw data

The raw data from the UAS, HOBO and i-Box sensors are provided as csv files.

The UAS data files (yyyymmdd-uas_hochhaeuser.csv) include:

• Date and time (UTC)

• Pressure (hPa)

• Rolling median of the pressure over 2000 seconds (hPa)

• Air Temperature (°C)

• Relative Humidity (%)

The i-Box data (yyyymmdd-ibox.csv) has been downloaded from ACINN-Data hub (https://acinn-data.uibk.ac.at/station/105/) and averaged over 10 minutes. The files among other variables include:

• Date and time (UTC)

• Wind speed 1 at 1.47 m AGL (m/s)

• Wind speed 2 at 2.62 m AGL (m/s)

• Wind speed 3 at 5.33 m AGL (m/s)

• Wind direction at 1.47 m AGL

The HOBO data file (hobo_rawdata.csv) includes temperature and dew point temperature (°C) at different heights:

• T01: Surface

• H2629: 0.72 m AGL

• H32: 1.22 m AGL

• H10: 1.82 m AGL

Note that HOBO H29 replaced HOBO H26 on 2025-02-03. The data has been combined to H2629.

References

Widy, S., 2025: Profiling the slope wind layer in steep Alpine terrain during winter with UAS. Bachelor‘s thesis, University of Innsbruck, 43 pp.