Day 4

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Paper title EarthCARE’s MSI aerosol product
  1. Nicole Docter Freie Universität Berlin Speaker
  2. Rene Preusker Freie Universität Berlin (FUB)
  3. Jürgen Fischer Freie Universität Berlin (FUB)
Form of presentation Poster
  • A1. Atmosphere
    • A1.09 EarthCARE: Preparing for the Scientific Mission Exploitation to Quantify the Impact of Clouds and Aerosols on Radiation
Abstract text The upcoming EarthCARE mission will deliver horizontal and vertical aerosol information from one single platform. While ATLID (atmospheric lidar) will be responsible for vertically resolved aerosol properties, horizontal, columnar information about aerosol will be provided by MSI (multi-spectral imager) measurements. For the latter, the L2 aerosol processor M-AOT has been developed. It will operationally estimate aerosol optical thickness over ocean at 670 and 865 nm and, where possible, over land at 670 nm.

Measurements of the four available MSI bands in the visible to shortwave infra-red (670 nm, 865 nm 1650 nm and 2200 nm) are used within the underlying algorithm that consists of a separate land and ocean retrieval part. The ocean surface is parameterized following Cox and Munk (1954) and the land surface albedo is empirically parameterized relying on information about the vegetation type and the albedo at 2200 nm. Both algorithm parts are using an optimal estimation framework, whose forward operator relies on pre-calculated look-up tables that have been generated using radiative transfer code MOMO [Hollstein and Fischer, 2012] and are using the EarthCARE Hybrid End-To-End Aerosol Classification (HETEAC) model [Wandinger et al. 2016] to ensure consistency between ATLID and MSI based aerosol products.

Here, the underlying algorithm itself and product examples based on EarthCARE simulator test scenes will be presented together with algorithm verification and already known limitations of the area of application based on retrieval testing with MODIS input data.

Cox, C. and Munk, W.: Measurements of the roughness of the sea surface from photographs of the sun's glitter. J.Optical Soc. Amer. 44, Pages 838-850, 1954.
Hollstein, A. and Fischer,J.: Radiative transfer solutions for coupled atmosphere ocean systems using the matrix operator technique. Journal of Quantitative Spectroscopy and Radiative Transfer Volume 113, Issue 7, May 2012, Pages 536–548, 2012.
Wandinger, U., Baars, H., Engelmann, R., Hünerbein, A., Horn, S., Kanitz, T., Donovan, D., van Zadelhoff, G.J., Daou, D., Fischer J., von Bismarck, J., Filipitsch, F., Docter, N., Eisinger, M., Lajas, D. and Wehr, T.: HETEAC: The Aerosol Classification Model for EarthCARE. EPJ Web of Conferences, 119, 2016