PM 2.5 unit conversion from kg/m3 to kg/m2

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dinesh_5497
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PM 2.5 unit conversion from kg/m3 to kg/m2

by dinesh_5497 » Sat Mar 09, 2024 10:55 am America/New_York

I have data from merra 2 for sea salt mass concentration, the unit is kg/m3 , i need it in kg/m2 for my application. I like value for length scale which needs to multipled to it. How to find a length scale for specific location.

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Re: PM 2.5 unit conversion from kg/m3 to kg/m2

by GES DISC - mgreene » Tue Mar 12, 2024 10:40 am America/New_York

Hello,

A MERRA-2 subject matter expert will respond soon.

Regards,

mbosilov
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Re: PM 2.5 unit conversion from kg/m3 to kg/m2

by mbosilov » Tue Mar 12, 2024 2:33 pm America/New_York

dinesh_5497 wrote: Sat Mar 09, 2024 10:55 am America/New_York I have data from merra 2 for sea salt mass concentration, the unit is kg/m3 , i need it in kg/m2 for my application. I like value for length scale which needs to multipled to it. How to find a length scale for specific location.

mbosilov
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Re: PM 2.5 unit conversion from kg/m3 to kg/m2

by mbosilov » Tue Mar 12, 2024 2:37 pm America/New_York

dinesh_5497 wrote: Sat Mar 09, 2024 10:55 am America/New_York I have data from merra 2 for sea salt mass concentration, the unit is kg/m3 , i need it in kg/m2 for my application. I like value for length scale which needs to multipled to it. How to find a length scale for specific location.
Hi, I am assuming that you are using a variable SSSMASS25. The surface layer height varies in space and time. You can find HLML (Height of the lowest model layer, units m) in tavg1_2d_flx_Nx (M2T1NXFLX): Surface Flux Diagnostics. I hope that helps.

dinesh_5497
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Re: PM 2.5 unit conversion from kg/m3 to kg/m2

by dinesh_5497 » Wed Mar 13, 2024 12:14 am America/New_York

Based on your answer, i need to download HLML from tavg1_2d_flx_Nx (M2T1NXFLX) and multiply with the SSSMASS.

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