Day 4

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Paper title A synergistic product to optimize EarthCARE's joint radar and lidar observations when probing the atmosphere
Authors
  1. Abdanour Irbah LATMOS/IPSL, Sorbonne Université, UVSQ, CNRS, Paris, France Speaker
  2. Julien Delanoë LATMOS/IPSL, CNRS, Université Paris-Saclay
  3. Gerd-Jan van Zadelhoff Royal Netherlands Meteorological Institute (KNMI)
  4. David Patrick Donovan Royal Netherlands Meteorological Institute (KNMI)
  5. Shannon Mason European Centre for Medium-Range Weather Forecasts (ECMWF)
  6. Aleksandra Tatarevic
  7. Bernat Puigdomènech
  8. Robin Hogan European Centre for Medium-Range Weather Forecasts (ECMWF)
  9. Pavlos Kollias Stony Brook University, Stony Brook, NY, United States
Form of presentation Poster
Topics
  • A1. Atmosphere
    • A1.09 EarthCARE: Preparing for the Scientific Mission Exploitation to Quantify the Impact of Clouds and Aerosols on Radiation
Abstract text Clouds and aerosols play an essential role in the Earth's radiative balance and therefore condition its temperature and possibly its evolution. Knowledge of their life cycle is therefore essential to understand the Earth's climate but also to predict meteorological conditions. The EarthCARE mission, currently under development for launch in 2023, was decided in this direction to provide solutions to these questions. To do this, it will probe the Earth's atmosphere by measuring the profiles of clouds and aerosols but also radiation thanks to its set of on-board instruments including radar and lidar. The association of these two instruments is not accidental. Indeed, the synergy of radar and lidar measurements collocated over an area or a transect of the atmosphere is a powerful tool for removing any ambiguity about the atmospheric targets present. The AC-TC (ATLID CPR – Target Classification) product is then created in this goal for EarthCare. It is a synergistic product that combines observations from the Cloud Profiling Doppler Radar (CPR) and the high spectral resolution Atmospheric Lidar (ATLID) on board EarthCARE satellite (ESA-JAXA). This product relies on the complementary nature of radar and lidar measurements to properly define targets (hydrometeors and aerosols) present when probing the atmosphere. Each instrument is sensitive to different parts of particle size regimes, with ATLID probing the smaller particles (i.e. aerosols and cloud particles) and CPR more sensitive to the larger particles (i.e. ice cloud particles and precipitation) providing independent information (microwave or optical) in the region of overlap. The combination of their signals makes it possible to better classify the different atmospheric targets in comparison to the single instruments. Therefore, the cloud phase, precipitation and aerosol type within the column sampled by the two instruments can be identified. This product is a crucial step for the subsequent synergistic retrieval of cloud, aerosol and precipitation properties. Further, it can also be used on its own for statistical studies of atmospheric conditions via e.g. the statistical analysis of the cloud, aerosol and precipitation occurrence. The AC-TC product capitalizes on the enormous success of CloudSat/CALIPSO satellites on the A-Train constellation and their synergistic derivatives while providing a richer target classification due to the EarthCARE instruments.