Seoul National University - Atmospheric Chemistry Modeling Group

CESM + GEOS-Chem linking tool

This part will be chaged by general linkingtooldescription....--> Our research goal is to improve knowledge of the chemical composition of the atmosphere and its perturbation by human activity, with consequences ranging from regional air pollution to global climate change.

Our group uses 3D global and regional models of atmospheric chemistry and climate, together with analyses of various atmospheric observations including aircraft, satellite, and surface networks, to address issues related to chemical composition, emission sources, transport of pollution, and climate forcing by ozone and aerosols.

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How to run GEOS-Chem using CESM output

Build GCAP executable

1) Uncomment the CESM definition line in 'define.h'. Comment other definition line (e.g. GEOS5, GEOS4, GEOS3)

!----- Model types -----

#define CESM 'CESM'

!#define GEOS_3 'GEOS_3'

!#define GEOS_4 'GEOS_4'

!#define GEOS_5 'GEOS_5'

2) In the main directory, type 'make clean' to remove all the dependent and objective files away from each directory.

3) Type 'make' to build the executable file

Readme before running

1. linkingtool need 3-types of file 3-hr atm, 6-hr atm, and 3-hr lnd.

2. CESM output list (variables name in CESM model)

* 3-hr atm output:
time, datesec, P0, hyai, hybi, hyam, hybm , CLDTOT, SHFLX, LHFLX, PBLH, PRECC, PRECSC, PRECSL, PRECT, SNOWHLND, FLNS, FSNS, UBOT, VBOT, USTAR, TS, ASDIR

* 6-hr atm output:
time, datesec, hyai, hybi, hyam, hybm, CLOUD, TOT_CLD_VISTAU, TGCLDLWP, TGCLDIWP, CMFMC, CMFMCDZM, PTECLDICE, PTECLDLIQ, DCQ,ICIMR, ICWMR, Q,RELHUM, T, U, V, HKFLXPRC, ZMFLXPRC, ZMDLF, PS, PSL, LANDFRAC, ICEFRAC

* 3-hr lnd output:
time, SNOWDP, TSA, TG, FSDSVD, FSDSVI, ELAI, H2OSOI, FCEV, FCTR, FGEV, Z0M

3. namelist file is namelist.input file. main program is cems_linking.pro and are writing in IDL code.

4. CESM output file should be monthly file. If file is yearly, you can use Make_Monthfile_CESM.sh to change yearly file to monthly file.

5. Linking tool only support 0.9x1.25 resolution now. It will be updated.