GLENS DATA

[pansah]

Hi,

I want to download GLENS data on stratosphere SO4. What I found was SO4_al1,SO4_a2, and SO4_a3 which I suppose are the aikten, accumulation and coarse modes. To get the total SO4 across modes is it plausible to add (SO4_total=SO4_al1*1.0+ SO4_a2*1.0 + SO4_a3*1.0 ) -based on how the fields where derived ?

Thank you

 

[rrbuchholz]

Hi Peter,

Correct, this is the way to sum atmospheric aerosols. If you also want to add the "in cloud" aerosol, you need to also add the "<species>_c1", "<species>_c2" and "<species>_c3" values.

Here is the Wiki page on aerosols: Aerosols - CAM-Chem - wiki.ucar.edu

Unit conversions may also be helpful: Using MOZART-4 output - MOZART-4 - wiki.ucar.edu

Best,
Rebecca

 

[pansah]

Hi Peter,

Correct, this is the way to sum atmospheric aerosols. If you also want to add the "in cloud" aerosol, you need to also add the "<species>_c1", "<species>_c2" and "<species>_c3" values.

Here is the Wiki page on aerosols: Aerosols - CAM-Chem - wiki.ucar.edu

Unit conversions may also be helpful: Using MOZART-4 output - MOZART-4 - wiki.ucar.edu

Best,
Rebecca

Thank you, Rebecca. That was helpful!
Also, for SO4 AOD, what I found was at 550nm. Are there other spectral bands (slightly around that wavelength) available in the GLENS dataset that I might have overlooked?

I suppose the SO4 AOD is for the extinction?

 

[pansah]

Thank you, Rebecca. That was helpful!
Also, for SO4 AOD, what I found was at 550nm. Are there other spectral bands (slightly around that wavelength) available in the GLENS dataset that I might have overlooked?

I suppose the SO4 AOD is for the extinction?

And if there are not, are there angstrom exponents for that purpose? Or is there a more standardadized, advisable way you would recommend?

Thank you,
Peter

 

[strandwg]

For reference, the variable list for GLENS is at

Geoengineering large ensemble field List