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Date of report: 2022
Title: Advection error in Spectral Element dycore
Issue: Spurious vertical transport was found over steep topography. The issue is described in this AMWG GitHub issue #151.
Model tags affected: ???
Model response: ???
Fix: For For CESM2.2.0 source code the correction is, in src/dynamics/se/dycore/prim_advance_mod.F90 (at l.578), replace:
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elem(ie)%derived%dpdiss_ave(i,j,k)=elem(ie)%derived%dpdiss_ave(i,j,k)+& |
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rhypervis_subcycle*eta_ave_w*elem(ie)%state%dp3d(i,j,k,nt) |
with:
| Code Block | ||
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elem(ie)%derived%dpdiss_ave(i,j,k)=elem(ie)%derived%dpdiss_ave(i,j,k)+& |
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rhypervis_subcycle*eta_ave_w*(elem(ie)%state%dp3d(i,j,k,nt)-dp3d_ref(i,j,k,ie)) |
More information: The correction for current development tags is provided in CAM github issue #633.
Update Nov 1, 2022: Please see additional code fix described in CAM github issue #678.
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Date of report: 2021
Title: MPAN+M chemistry bug
Issue: In the TS1 and TSMLT1 chemistry mechanisms (compsets FCnudged, FCHIST, FWHIST, etc.) the MPAN+M reaction is not calculated because the user reaction refers to a reaction not in the mechanism (tag_MCO3_NO2 instead of usr_MCO3_NO2). This error does not exist in the TS2 chemical mechanisms.
Model tags affected: Not in versions CESM2.1 and prior. Found in version CESM2.2, May 2021. Fixed in version CAM6_3_019.
Model response: Missing chemistry.
Fix: Update chemical mechanism from:
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[usr_MCO3_NO2] MCO3 + NO2 + M -> MPAN + M |
to:
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[tag_MCO3_NO2] MCO3 + NO2 + M -> MPAN + M. ; 9.7e-29, 5.6, 9.3e-12, 1.5, 0.6 |
More information: CAM GitHub issue #364
Contact Louisa Emmons with any questions.
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