GTMM Offline Spin-up Methodology

This step-by-step guide provides instructions for running the standalone version of the GTMM to a pre-anthropogenic equilibrium. This document contains information from on the GTMM manual. 

1. Set Up GTMM Directories

Follow instructions in the GTMM/GEOS-Chem Odyssey Guide to set up directories and download data files. 

Directories include:

YOUR_SOURCE_DIRECTORY (i.e., GCgtmm)

YOUR_GTMM_DIRECTORY (i.e., GTMM)

1a. New Simulation (Not a Continuation Run)

If performing a new simulation, make sure that your 

1. Modify and compile GTMM code:
   1. Edit defineConstants.F90 in GTMM code (step 3.1 in GTMM/GEOS-Chem Odyssey Guide)
   2. Compile (step 3.2 in GTMM/GEOS-Chem Odyssey Guide)
2. Set up output directory:
   1. Output directory should contain the following files:
      1. gtmm*
      2. input.gtmm
      3. rungtmm.sh
   2. Modify input.gtmm to the following:
   3. Modify 
      
      

1b. Continuation Run

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  GTMM Offline Spin-up Methodology