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geoschem / HEMCO

The Harmonized Emissions Component (HEMCO), developed by the GEOS-Chem Support Team.
https://hemco.readthedocs.io
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Use USTAR read from GEOS instead of calculating from U10M and V10M #279

Open yuanjianz opened 1 month ago

yuanjianz commented 1 month ago

Name and Institution (Required)

Name: Yuanjian Zhang Institution: WashU

Describe the update

Use USTAR friction velocity from meteorology instead of calculating from wind at 10m. Comment out unused codes after this update but keep them following tradition.

Expected changes

Friction velocity is estimated to increase by 3 times. Dust emission is estimated to increase by 30 times, since dust emission is proportional to cube of friction velocity. Therefore, dust scaling factor needs to be recalculated. Following Meng, J.,et al, 2021, global annual dust emission for 2016 is scaled to 2000Tg.

Scaling factor GEOS-IT: 2.6421e-05 MERRA-2: 3.8891e-05 GEOS-FP: 3.0655e-05

Related Github Issue

278

yantosca commented 1 month ago

Also, this PR will need to go into GC 14.5.0 / HEMCO 3.10.0, as this will change the fullchem benchmark simulation results. I've changed the target branch accordingly.