Aerosol / particle single-scattering radiative properties

[mk-luftblick]

Hi @leroyvn,

I would like to know more about the aerosol data you are providing on the Eradiate Website and in your database. How did you extrapolated the continental and desert aerosol data based on which data? I need to further extrapolate all relevant aerosol types (continental, urban, biomass burning and desert dust) down to 300 nm in order to cover the O3 fitting window up to 325 nm. Could you please provide some more informations how you did it, cause so far I did not find the specific publications of these data and more insight informations on the procedure. I tried to extrapolate the data on my own, but I am not sure if this complies to your method.

https://eradiate.readthedocs.io/en/latest/data/aerosols_particles.html#govaerts-2021-continental-extrapolated

Thank you for your support in advance!

Cheers,
Markus.

[leroyvn]

Hi @mk-luftblick, sorry for the late response, I had to dig into the past of our work. The govaerts* datasets' name is a bit misleading as they are not published work: they were created to support RAMI4ATM and are representative of "continental" and "desert" aerosol classes. The single-scattering properties were computed using miepython.

IIRC, the "extrapolated" suffix comes from the fact that we extended the data to Eradiate's nominal spectral range, but we did this still computing the single-scattering properties. We do not have a systematic method to extend the spectral range of these data.

[mk-luftblick]

Hi @leroyvn,
no worries, thank you so much for your answer.

Does this mean that there is currently no established procedure to extrapolate the sixsv-biomass_burning and sixsv-urban aerosol datasets down to 300 nm? We would need this in order to match the spectral range of our Eradiate simulations to that of the Pandora measurements (280–545 nm).

Alternatively, do you know of any other data products for these two aerosol types that cover wavelengths below 350 nm?

Thank you in advance!
Cheers,
Markus

[leroyvn]

Hi @mk-luftblick, we recently added a converter for libRadtran's single-scattering property format. The MOPSMAP online tool can generate data in this format, I think you could create a configuration to generate an aerosol dataset that suits your use case.

I hope that helps. If you have issues using the converter, please don't hesitate to reach out.

[mk-luftblick]

Hi @leroyvn,

very good. Great thank you so much for your hint this really helps.

Cheers,
Markus.