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noresm:aerosolbudgetsnoresm2 [2015-06-08 11:53:59]
alfg
noresm:aerosolbudgetsnoresm2 [2022-05-31 09:29:32]
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-===Configuring a run with more aerosol diagnostics in (NorESM2) === 
- 
-In both the default CAM5-aerosol packages (MAM3,MAM7) and the Oslo-aerosol packages, the budget terms can be taken out using a variable in the namelist :  
- 
-<file> 
-&phys_ctl_nl 
-history_aerosol = .true. 
-/ 
-</file> 
- 
-Two more diagnostics are useful: 
-  * Enable estimates multiple calls to radiation which are necessary for effective radiative forcing estimates 
-  * Enable diagnostics for AEROCOM 
- 
- 
-To enable this, take the file cam/src/physics/cam_oslo$ vim preprocessorDefinitions.h and copy it to your SourceMods/src.cam folder 
- 
-Change both preprocessor definitions to true 
- 
-<file> 
-#define AEROCOM 
-#define AEROFFL 
-</file> 
- 
-The AEROCOM-token turns on diagnostics needed for AEROCOM 
-The AEROFFL-token tells the model to do additional radiation-diagnostics for aerosol indirect effect 
- 
-===Fields produced in monthly average files when running with budgets activated=== 
- 
-Running with budgets activated will produce the following terms in the monthly output files:  
- 
-^ Output variable name    ^ Meaning                      ^ Comment               ^ 
-| SF{Tracer}              | Emissions from surface                             | 
-| GS_{Tracer}             | gas phase chemistry          | 3D-emissions and gas phase washout included in this term |  
-| AQ_{Tracer}             | aquous chemistry                                                                      | 
-| {Tracer}_Mixnuc1        | Activation in clouds and evaporation of cloud droplets |                                |  
-| {Tracer}_DDF            | Dry deposition flux (aerosol tracers)                  |                                | 
-| {Tracer}_SFWET          | Wet deposition flux (aerosol tracers)                  |                                | 
-| {Tracer}_condtend       | loss/production in condensation/nuclation              | (CAM-Oslo only)                | 
-| {Tracer}_coagTend       | loss/production in coagulation                         | (CAM-Oslo only)                | 
-| DF_{Tracer}             | dry deposition flux (gas tracers)                      | output with history_aerosol with CAM-Oslo only| 
-| WD_A_{Tracer}           | wet deposititon flux (gas tracers)                     | output with history_aerosol with CAM-Oslo only| 
-| {Tracer}_CLXF           | 3D-emissions ("external forcing"                     | output with history_aerosol with CAM-Oslo only| 
-| {Tracer}_clcoagTend     | loss of tracer due to coagulation with cloud droplets  | output with history_aerosol with CAM-Oslo only| 
- 
-Note: Since 3D-emissions and and gas washout rates are included in the term GS_{Tracer} in the mozart chemistry solver, the individual terms can be found like this (example for SO2):  
-<file> 
-ncap2 -O -s GS_ONLY_SO2=GS_SO2-WD_A_SO2-SO2_CLXF infile.nc outfile.nc 
-</file> 
- 
-More info on SO2 budgets (see /models/atm/cam/tools/diagnostics/ncl/ModIvsModII/ for scripts with info on all tracers):  
- 
-GS_SO2 contains the SO2 budget terms for all that goes on in the chemistry-routine, which is \\ 
-1) Gas phase chemistry, 2) Wet deposition, and 3) 3D-emissions.\\ 
-Gas phase chemistry is both production from DMS (GS_DMS) and loss through OH (GL_OH) \\ 
-For calculations of net loss, e.g. used to calculate SO2 life-times, we're interested in the \\ 
-loss through OH from the chemistry-term (GL_OH).\\ 
-GS_SO2 = GL_OH + SO2_CLXF - WD_A_SO2 - GS_DMS*64/62 \\ 
-or \\ 
-GL_OH = GS_SO2 - SO2_CLXF + WD_A_SO2 + GS_DMS*64/62 \\ 
- 
-Estimating chemical loss w.r.t. S (instead of SO2 or DMS), for comparison with CAM4-Oslo numbers:\\ 
-net chemial loss gas phase = (GS_SO2/1.998 - SO2_CLXF + WD_A_SO2)/1.998  + GS_DMS/1.938 \\ 
-net chemical loss = net chemial loss gas phase + AQ_SO2/1.998 \\ 
- 
-Finally, total net loss (used to calculate life-time = -load/(net loss), where load = cb_SO2/1.998):\\ 
-net loss = \\ 
-- WD_A_SO2/1.998    ;wet deposition in kg/m2/sec (positive in output file) \\ 
-- DF_SO2/1.998      ;dry deposition in kg/m2/sec (positive in output file) \\ 
-+ AQ_SO2/1.998      ;wet phase production of SO4 in kg/m2/ses (negative in output file) \\ 
-+ (GS_SO2 - SO2_CLXF + WD_A_SO2)/1.998 + GS_DMS/1.938  ; net chemical loss gas phase \\ 
- 
-===Looking at the aerosol budgets (CAM-Oslo only) === 
- 
-  * Go to the directory models/atm/cam/tools/diagnostics/ncl/budgets 
-  * Change the filename to use in the file budgets.ncl ("myFileName" around line 18). Should be for example yearly average of month-avg file in a run with budgets 
-  * Run the script budgets.sh to create a pdf-file (output.pdf) 
- 
-===Preparing output for AEROCOM === 
- 
-To prepare output for aerocom, use the script located at **models/atm/cam/tools/aerocom/** in the svn repository.  
- 
-The script requires <ModelName>_<ExperimentName> and <Period> as input. 
- 
-The script creates files named like 
- 
-“aerocom3_<ModelName>_<ExperimentName>_<VariableName>_<VerticalCoordinateType>_<Period>_<Frequency>.nc” 
- 
-<ModelName> ⇒ eg NorESM-CAM53 \\ 
-<ExperimentName> ⇒ svn{RevisionNumber}_YYMMDD{initials}_Freetext \\ 
-<VariableName> ⇒ aerocom variable names \\ 
-<VerticalCoordinateType> ⇒ “Surface”, “Column”, “ModelLevel”, “SurfaceAtStations”, “ModelLevelAtStations” \\ 
-<Period> ⇒ eg “2008”, “2010”, "9999" \\ 
-<Frequency> ⇒ “timeinvariant”,”hourly”, “daily”, “monthly”, “sat1000”, “sat1330”, “sat2200”, “sat0130” \\ 
- 
-Note that VerticalCoordinateType is dependent on the variable!! It is not a question about "vertical coordinate type used in model simulations"! 
- 
-The script copies files on norstore into 
-**/projects/NS2345K/CAM-Oslo/DO_AEROCOM/<ModelName>_<ExperimentName>/renamed/** 
  
  • noresm/aerosolbudgetsnoresm2.txt
  • Last modified: 2022-05-31 09:29:32
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