Rückert, Janna Elisabeth; Spreen, Gunnar; Walbröl, Andreas; Ebell, Kerstin; Mech, Mario: HATPRO microwave radiometer measurements of the surface emissions from onboard the RV POLARSTERN during the ATWAICE expedition PS131 to the Arctic in summer 2022 [dataset]. PANGAEA, https://doi.pangaea.de/10.1594/PANGAEA.974415 (dataset in review)
Abstract:
The data set contains daily files of microwave radiation measurements by the HATPRO microwave radiometer (see Rose et al., 2015, doi:doi:10.1016/j.atmosres.2004.12.005) during a surface-observation mode onboard the RV POLARSTERN during cruise PS131 (ATWAICE expedition, see Kanzow, 2023, doi:10.57738/BzPM_0770_2023). The instrument was installed at about 22 m height at the top deck on starboard site. Via a mirror construction the radiometers were observing the surface, i.e, ocean and sea ice, at a viewing angle of about 53° off nadir for 15 min each hour. The actual viewing angle could vary by a few degrees because of ship motion. Also, on six occasions the mirror position was changed to observe at different viewing angles. The data covers the range July 7, 2022 to August 12, 2022. The radiation measurements are given as brightness temperatures in seven K band channels (22.24 - 31.4 GHz), predominantly-vertical polarization at the viewing angle, and seven V band (51.26 - 58 GHz) channels, predominantly-horizontal polarization at the viewing angle. During the cruise the instrument was calibrated with liquid nitrogen on July 7 and July 30. The data is processed with the mwr_pro software (doi:10.5281/zenodo.7973552). Quality flags characterizing the instrument and retrieval performance are set and described. The brightness temperatures are provided for all available times so that it is up to the user to decide whether or not to use the values if quality flags are set. The sanity_receiver_band1, sanity_receiver_band2 and rain_flag are rather strict and data quality might still be satisfying despite the flag being set. However, we recommend to exclude data where visual_inspection_filter_band_1, visual_inspection_filter_band_2 or visual_inspection_filter_band_3 are set.
Supplement to:
Rückert, Janna Elisabeth; Walbröl, Andreas; Risse, Nils; Krobot, Pavel; Haseneder-Lind, R; Mech, Mario; Ebell, Kerstin; Spreen, Gunnar (2025): Microwave sea ice and ocean brightness temperature and emissivity between 22 and 243 GHz from ship-based radiometers. Annals of Glaciology, 1-33, https://doi.org/10.1017/aog.2025.1
Related to:
Rückert, Janna Elisabeth; Niehaus, Hannah; Walbröl, Andreas; Spreen, Gunnar (2024): Visual images of the surface taken by a camera installed on RV POLARSTERN during expedition PS131 (ATWAICE) (June - August 2022, Fram Strait/East Greenland) [dataset]. PANGAEA, https://doi.org/10.1594/PANGAEA.967580
Rückert, Janna Elisabeth; Spreen, Gunnar; Huntemann, Marcus; Niehaus, Hannah; Walbröl, Andreas (2024): Surface brightness temperature images measured by an infrared camera installed on RV POLARSTERN during expedition PS131 (ATWAICE) (June - August 2022, Fram Strait/East Greenland) [dataset]. PANGAEA, https://doi.org/10.1594/PANGAEA.967576
References:
Alfred-Wegener-Institut Helmholtz-Zentrum für Polar- und Meeresforschung (2017): Polar Research and Supply Vessel POLARSTERN operated by the Alfred-Wegener-Institute. Journal of large-scale research facilities JLSRF, 3, A119, https://doi.org/10.17815/jlsrf-3-163
Kanzow, Torsten (2023): The Expedition PS131 of the Research Vessel Polarstern to the Fram Strait in 2022. Berichte zur Polar- und Meeresforschung = Reports on Polar and Marine Research, 770, 320 pp, https://doi.org/10.57738/BzPM_0770_2023
Rose, Thomas; Crewell, Susanne; Löhnert, Ulrich; Simmer, Clemens (2005): A network suitable microwave radiometer for operational monitoring of the cloudy atmosphere. Atmospheric Research, 75(3), 183-200, https://doi.org/10.1016/j.atmosres.2004.12.005
Project(s):
Arctic Amplification (AC3)
Funding:
Alfred Wegener Institute, Helmholtz Centre for Polar and Marine Research, Bremerhaven (AWI), grant/award no. AWI_PS131_11: WALSEMA
German Research Foundation (DFG), grant/award no. 268020496: TRR 172: ArctiC Amplification: Climate Relevant Atmospheric and SurfaCe Processes, and Feedback Mechanisms
Coverage:
Latitude: 53.563999 * Longitude: 8.558988
Date/Time Start: 2022-06-28T11:00:00 * Date/Time End: 2022-08-17T06:03:00
Event(s):
PS131-track * Latitude Start: 53.563998 * Longitude Start: 8.558993 * Latitude End: 53.564000 * Longitude End: 8.558982 * Date/Time Start: 2022-06-28T11:00:00 * Date/Time End: 2022-08-17T06:03:00 * Campaign: PS131 (ATWAICE) * Basis: Polarstern * Method/Device: Underway cruise track measurements (CT) * Comment: Bremerhaven - Bremerhaven
Comment:
File descriptions:
The data is uploaded as daily netCDF files following CF-1.6 convention. The dimensions and variables that are included in each files are:
dimensions: time, nv, n_freq, n_freq2, n_wl_irp
variables(dimensions): time(time), time_bnds(time, nv), lat(time), lon(time), zsl(), freq_sb(n_freq), azi(time), ele(time), tb(time, n_freq), tb_bias_estimate(time, n_freq), freq_shift(n_freq), tb_absolute_accuracy(n_freq), tb_cov(n_freq2, n_freq), wl_irp(n_wl_irp), tb_irp(time, n_wl_irp), ele_irp(time), ta(time), pa(time), hur(time), flag(time), target_zenith(time)
Here, we have two receivers (nv) with corresponding frequencies (n_freq and n_freq2)
Parameter(s):
| # | Name | Short Name | Unit | Principal Investigator | Method/Device | Comment |
|---|---|---|---|---|---|---|
| 1 | Binary Object | Binary | Rückert, Janna Elisabeth | Passive microwave radiometer, RPG-Radiometer Physics GmbH, HATPRO | ||
| 2 | Binary Object (File Size) | Binary (Size) | Bytes | Rückert, Janna Elisabeth | Passive microwave radiometer, RPG-Radiometer Physics GmbH, HATPRO | |
| 3 | Binary Object (Character Set) | Binary (Charset) | Rückert, Janna Elisabeth | Passive microwave radiometer, RPG-Radiometer Physics GmbH, HATPRO | ||
| 4 | Binary Object (Media Type) | Binary (Type) | Rückert, Janna Elisabeth | Passive microwave radiometer, RPG-Radiometer Physics GmbH, HATPRO | ||
| 5 | Binary Object (MD5 Hash) | Binary (Hash) | Rückert, Janna Elisabeth | Passive microwave radiometer, RPG-Radiometer Physics GmbH, HATPRO |
License:
Creative Commons Attribution 4.0 International (CC-BY-4.0) (License comes into effect after moratorium ends)
Status:
Curation Level: Enhanced curation (CurationLevelC)
Size:
36 data points