EGU2020-14242, updated on 21 Oct 2022
EGU General Assembly 2020
© Author(s) 2022. This work is distributed under
the Creative Commons Attribution 4.0 License.

Validation of Aeolus aerosol and wind products with sophisticated ground-based instruments in the Northern and Southern Hemisphere

Holger Baars1, Alina Herzog1,2, Ronny Engelmann1, Johannes Bühl1, Martin Radenz1, Patric Seifert1, Albert Ansmann1, Dietrich Althausen1, Birgit Heese1, Julian Hofer1, Kevin Ohneiser1, Karsten Hanbuch1, Elizaveta Basharova1, Tülin Gülbas1, Alexandra Chudnovsky3, Boris Barja4, Maria Filioglou5, Mika Komppula5, and Ulla Wandiger1
Holger Baars et al.
  • 1Leibniz Institute for Tropospheric Research (TROPOS), Remote Sensing of Atmospheric Processes, Leipzig, Germany (
  • 2Institute for Meteorology, University Leipzig, Leipzig, Germany
  • 3Tel Aviv University, Porter School of Earth Sciences and Environment, Tel Aviv, Israel
  • 4Laboratorio de Investigaciones Atmosféricas, Universidad de Magallanes, Punta Arenas, Chile
  • 5Finnish Meteorological Institute, Kuopio, Finland

The European Space Agency (ESA) has launched the Earth Explorer Mission Aeolus on 22 August 2018. Within the German initiative EVAA (Experimental Validation and Assimilation of Aeolus observations), Cal/Val activities for Aeolus started immediately after the instrument was turned on in space. The aim is to validate the wind and aerosol products of Aeolus and to quantify the benefits of these new measurements for weather forecasting and aerosol and cloud research.
For this purpose, ground-based aerosol and wind lidar observations have been performed at the Leibniz Institute for Tropospheric Research (TROPOS) in Leipzig, Germany, and at Punta Arenas (53.13 S, 70.88 W), Chile, in the frame of the DACAPO-PESO campaign ( Radiosondes have been launched during the Aeolus overpasses each Friday at Leipzig in addition since mid of May 2019. In Punta Arenas, we also used Doppler cloud radar observations with respect to the validation of Mie and Rayleigh winds of Aeolus.  

Aerosol-only observations with multiwavelength-Raman polarization lidar were made at the PollyNET (Baars 2016) stations in Haifa (Israel), Dushanbe (Tajikistan), Tel Aviv (Israel), and in the United Arab Emirates (UAE) - the latter two are hosted by PollyNET partner institutions (Baars, 2016). These locations are close to the desert with frequent dense, lofted aerosol layers and are thus of particular interest for Aeolus Cal/Val. Considering the long averaging length of Aeolus (87 km) and the distance to the lidars (max. 100 km), a good agreement with respect to the co-polar backscatter coefficient is found between Aeolus and the ground-based lidars at these locations.

We will present results from the above-mentioned Cal/Val activities with respect to, both, wind and aerosol products of Aeolus. It will be shown, that one of the mission goals, namely the demonstration that wind observations from space by active remote sensing are possible, have been already achieved. Furthermore, it will be demonstrated that the spaceborne HSRL (high spectral resolution lidar) technique applied for Aeolus can provide independent backscatter and extinction measurements of aerosols – a spaceborne novelty as well. Since September 2019, also an aerosol-optimized range resolution, the so-called Mediterranean range-bin setting (MARS), is operational for Aeolus in the Eastern Mediterranean. First results show a significantly improved aerosol retrieval for this adapted instrumental setting and will be presented as well.



Baars, H., et al. (2016), An overview of the first decade of PollyNET: An emerging network of automated Raman-polarization lidars for continuous aerosol profiling, Atmos. Chem. Phys., 16(8), 5111-5137, doi:10.5194/acp-16-5111-2016.

How to cite: Baars, H., Herzog, A., Engelmann, R., Bühl, J., Radenz, M., Seifert, P., Ansmann, A., Althausen, D., Heese, B., Hofer, J., Ohneiser, K., Hanbuch, K., Basharova, E., Gülbas, T., Chudnovsky, A., Barja, B., Filioglou, M., Komppula, M., and Wandiger, U.: Validation of Aeolus aerosol and wind products with sophisticated ground-based instruments in the Northern and Southern Hemisphere , EGU General Assembly 2020, Online, 4–8 May 2020, EGU2020-14242,, 2020.


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