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Explanations of output diagnostic variables
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An example list of possible history file variables can be found here: CAM-chem History Fields
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. You can find the possible history fields for your own specific model build by looking in a log file for your setup simulation and searching for "MASTER FIELD LIST".
| Output variable | Units | Definition |
|---|---|---|
| SF_<species> | kg/m2/s | Emissions of species (Surface Flux) |
| MEG_<species> | kg/m2/s | Biogenic emissions calculated by MEGAN in CLM |
| LNO_PROD | molecules /cm3/s | 3D lightning NO emissions |
| LNO_COL_PROD | Tg-N/yr | vertically integrated lightning NO emissions |
| DV_<species> | cm/s | Dry Deposition Velocity of species |
| DF_<species> | kg/m2/s | Dry Deposition Flux of species |
| DTWR_<species> | kg/kg/s | Washout Rate of species (3D field) |
| WD_<species> | kg/m2/s | Wet Deposition vertically integrated flux. Note: prior to CESM2 this was output in units (kg/grid-box/s). |
<species>_CHMP <species>_CHML | molecules /cm3/s | Total chemical production and loss for species (based on equations found in $CASE/CaseDocs/chem_mech.doc). |
O3_Prod O3_Loss | molecules /cm3/s | For ozone, the gross production and loss terms (CHMP, CHML) are not particularly useful as they include the fast cycling reactions, so O3_Prod and O3_Loss are defined to represent the sum of the rate-limiting reactions of the OddOx family (O3 + O + O1D + NO2). These are the key terms in the OddOx equations. In hindsight, these O3_Prod and O3_Loss names probably should not have the name O3_ in them. These reactions are aimed primarily at deriving the tropospheric photochemical smog chemistry. The main reactions are: O3_Prod = NO_HO2 + CH3O2_NO + PO2_NO + CH3CO3_NO + C2H5O2_NO + .92*ISOPAO2_NO + .92*ISOPBO2_NO + MACRO2_NOa + MCO3_NO + C3H7O2_NO + RO2_NO + XO2_NO + .9*TOLO2_NO + .9*PHENO2_NO + .9*C6H5O2_NO + .9*BENZO2_NO + .9*MALO2_NO + .9*BZOO_NO + .9*ACBZO2_NO + .9*DICARBO2_NO + .9*MDIALO2_NO + .9*XYLOLO2_NO + .9*XYLENO2_NO + TERPO2_NO + TERP2O2_NO + NTERPO2_NO + ALKO2_NO + ENEO2_NO + EO2_NO + MEKO2_NO + HOCH2OO_NO + jonitr O3_Loss = O1D_H2O + OH_O3 + HO2_O3 + H_O3 + C3H6_O3 + .9*ISOP_O3 + C2H4_O3 + .8*MVK_O3 + 0.8*MACR_O3 + MTERP_O3 + BCARY_O3 These diagnostic terms are now (CESM2) defined in the atm_in namelist (the rxn_rate_sums variable in the rxn_rates_diag_nl group). These rate sums can be modified, or additional ones created, by the user in user_nl_cam. |
| j<photorate_label> | /s | Photolysis rate constant |
| r_j<photorate_label> | molecules /cm3/s | Photolysis rate (j * species density) |
| <rxnrate_label> | Reaction rate constant (e.g., "O1D_H2O" gives k for O1D+H2O) | |
| r_<rxnrate_label> | molecules /cm3/s | Reaction rate (k * [O1D] * [H2O] ) |
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