Validation study reveals moderate correlations and positive biases in Aeolus satellite wind measurements across India, indicating potential utility for weather model assimilation.
Key Points
To comprehensively validate Aeolus satellite Doppler wind lidar observations against ground-based radiosondes and reanalysis datasets over the Indian monsoon region across multiple seasons.
Evaluated ascending and descending Aeolus Level-2B Horizontal Line of Sight (HLOS) Rayleigh and Mie channel winds against India Meteorological Department GPS radiosondes launched at 00 and 12 UTC between June 2019 and October 2022.
Compared satellite retrievals against global (ERA5) and regional (IMDAA) reanalysis datasets categorized across pre-monsoon, monsoon, post-monsoon, and winter seasons.
Rayleigh-clear retrievals achieved a correlation of 0.64 with a bias of 1.21 m/s against in situ radiosonde observations.
Mie-cloudy retrievals demonstrated a correlation of 0.62 with a bias of 5.08 m/s compared to ground measurements.
Distinct bias variations were identified across seasonal categories when evaluated against ERA5 and IMDAA reanalysis models.