ESA-JAXA Pre-Launch EarthCARE
Science and Validation Workshop

13 – 17 November 2023 | ESA-ESRIN, Frascati (Rome), Italy

EVID36 (AO70173):
AVE-ECARE:
validation and evaluation of the EarthCARE aerosol products.
Larisa Sogacheva
Finnish Meteorological InstituteObjectives
The proposed work is aimed at the validation and evaluation ofEarthCARE products with the main focus on the aerosols.
Validation of aerosol products will be performed to(i) identify the level of confidence(ii) identify (provide to users) products limitations(iii) advice product providers on directions for product further development

ESA-JAXA Pre-Launch EarthCARE Science and Validation Workshop | 13 – 17 November 2023 | ESA-ESRIN, Frascati (Rome), Italy

EVID36 (AO70173): AVE-ECARE, aerosols

Products• ATLID aerosol parameters (KNMI)
Extinction, backscatter, and depolarisation for aerosol regions, aerosol layer information, aerosol type
• ATLID aerosol layer descriptors (TROPOS)
Aerosol layer top/base height, optical thickness, extinction, backscatter, depolarisation• MSI aerosol optical thickness (FU Berlin)
Aerosol optical thickness at 670 nm (land and ocean) and at 865 nm (ocean only)• ATLID/MSI aerosol column descriptor (Tropos)
Aerosol optical thickness at 355 and 670 nm (land and ocean) and at 865 nm (ocean only),
corresponding Angstrom exponents, aerosol type
• ATLID/CPR/MSI composite product (Environment Canada )Cloud water/ice content, cloud particle size, aerosol optical depth at 355 nm, aerosol typeESA-JAXA Pre-Launch EarthCARE Science and Validation Workshop | 13 – 17 November 2023 | ESA-ESRIN, Frascati (Rome), Italy

EVID36 (AO70173): AVE-ECARE, aerosols

Reference products

AERONET ground based observations and other similar
aerosol products retrieved from satellites (e.g., MODIS forcolumn AOD, Calipso*, Icesat-2,• *Calipso is not in operation since
MISR, Tropomi, PACE and for aerosol vertical profile
01.08.2023(ALH)).
• ALH from GEO satellites (Sentinel-4,GEMS, TEMPO)• High Spectral Resolution Lidar(HSRL-2)
https://www.unescap.org/sites/default/d8files/event-documents/Day3GEMS_SLee_1.pdf

https://aeronet.gsfc.nasa.gov/10.5194/acp-18-3903-2018
ESA-JAXA Pre-Launch EarthCARE Science and Validation Workshop | 13 – 17 November 2023 | ESA-ESRIN, Frascati (Rome), Italy

EVID36 (AO70173): AVE-ECARE, aerosols

Validation protocol
For column AOD• ESA/Copernicus LAW project (validation of Sy_2_AOD product) – has
not been finalized• ESA OPT_MPC project – further development

ESA-JAXA Pre-Launch EarthCARE Science and Validation Workshop | 13 – 17 November 2023 | ESA-ESRIN, Frascati (Rome), Italy

EVID36 (AO70173): AVE-ECARE, aerosols

Methods (1)Data collection and matchup• AERONET data in time window ±30 min around satellite
overpass• satellite data in XXX km radius around AERONET stations will
be collected and utilized

ESA-JAXA Pre-Launch EarthCARE Science and Validation Workshop | 13 – 17 November 2023 | ESA-ESRIN, Frascati (Rome), Italy

EVID36 (AO70173): AVE-ECARE, aerosols

Methods (2)Validation approaches• Statistical analysis• Temporal and spatial distribution• Analysis of factors possibly influencing product quality

Important to know
• Instrument specifications• Retrieval approaches/assumptions

ESA-JAXA Pre-Launch EarthCARE Science and Validation Workshop | 13 – 17 November 2023 | ESA-ESRIN, Frascati (Rome), Italy

EVID36 (AO70173): AVE-ECARE, aerosols

Examples for visualizationof validation results (1)Statistical analysis

Sogacheva et al., 2022
https://doi.org/10.5194/amt-15-5289-2022
ESA-JAXA Pre-Launch EarthCARE Science and Validation Workshop | 13 – 17 November 2023 | ESA-ESRIN, Frascati (Rome), Italy

EVID36 (AO70173): AVE-ECARE, aerosols

Examples for visualizationof validation results (2)Temporal and spatial distribution

Aeronet AOD

ESA-JAXA Pre-Launch EarthCARE Science and Validation Workshop | 13 – 17 November 2023 | ESA-ESRIN, Frascati (Rome), Italy

Sogacheva et al., 2022
https://doi.org/10.5194/amt-15-5289-2022
EVID36 (AO70173): AVE-ECARE, aerosols

Examples for visualizationof validation results (3)Per station analysis

ESA-JAXA Pre-Launch EarthCARE Science and Validation Workshop | 13 – 17 November 2023 | ESA-ESRIN, Frascati (Rome), Italy

EVID36 (AO70173): AVE-ECARE, aerosols

Examples for visualizationof validation results (4)Impact of, e.g.,geometry/
aerosol types/
surface reflectance

Sogacheva et al., 2022https://doi.org/10.5194/amt-15-5289-2022
ESA-JAXA Pre-Launch EarthCARE Science and Validation Workshop | 13 – 17 November 2023 | ESA-ESRIN, Frascati (Rome), Italy

EVID36 (AO70173): AVE-ECARE, aerosols

Examples for visualizationof validation results (5)Validation of AOD uncertainties

χ2 testPrognostic uncertainties
AOD error
Gaussian distribution

ESA-JAXA Pre-Launch EarthCARE Science and Validation Workshop | 13 – 17 November 2023 | ESA-ESRIN, Frascati (Rome), Italy

Potential of
Expected Discrepancy
Sogacheva et al., 2022
https://doi.org/10.5194/amt-15-5289-2022
EVID36 (AO70173): AVE-ECARE, aerosols

Where to go• Column aerosol validation approaches have to be adapted for EarthCARE• Consider lessons learnt from the validation / evaluation of Caliop products• Explore funding opportunities

Thank you for your attention

ESA-JAXA Pre-Launch EarthCARE Science and Validation Workshop | 13 – 17 November 2023 | ESA-ESRIN, Frascati (Rome), Italy

EVID36 (AO70173): AVE-ECARE, aerosols