Satellite-based measurements of brightness temperatures (AMSR2 sensor) colocated to MOSAiC ground measurements

• Main Author: Janna E. Rückert
• Format: Other/Unknown Material
• Language: unknown
• Published: Zenodo 2023
• Subjects: Sea ice
• Online Access: https://doi.org/10.5281/zenodo.8144560

The file contains measurements of brightness temperatures of satellite overpasses of the research vessel Polarstern during the MOSAiC expedition from October 26, 2019 - May 26, 2020 as well as co-located measurements of different parameters. For every overpass of Polarstern, the satellite measurement closest to the hourly position of Polarstern is taken. The satellite sensor is AMSR2 (six frequencies between 6.9 and 89 GHz and both polarizations) and we use the Level 1R ( Madea et al., 2016) product available at JAXA https://gportal.jaxa.jp/gpr/ The co-located parameters are liquid water path, total water vapor, sea ice concentration, multi-year ice fraction, snow depth, snow-air interface temperature, snow-ice interface temperature, wind speed and sea surface temperature. In addition to the co-located parameters as ground truth, the dataset also contains their “uncertainties” given as temporal and/or spatial variability. Note: The dataset contains only satellite overpasses where co-located data is available. More information on the parameters are found below and they are described in more detail in Rückert et al., 2023 and the references given therein. scantime : time of satellite observation as included in the satellite data from JAXA lon : longitude in decimal degrees (DD) of satellite observations as included in the satellite data from JAXA lat : latitude in decimal degrees (DD) of satellite observations as included in the satellite data from JAXA distance : distance to the hourly Polarstern position TB6.9V, TB6.9H, TB10.7V, TB10.7H, TB18.7V, TB18.7H, TB23.8V, T B23.8H, TB36.5V, TB36.5H, TB89V, TB89H : Brightness temperatures (TB) measured by AMSRE2, the name includes the frequency in GHz and the polarization (either H for horizontal or V for vertical polarization), e.g, TB6.9V is the brightness temperature at 6.9 GHz and vertical polarization LWP : liquid water path in kg/m² measured by a radiometer onboard the ship ( Walbröl et al., 2022 ), averaged within +/- 10 minutes of the satellite ...