Back to parent page - Aerosol nucleation
Test of initial particle growth after nucleation¶
The subroutine newnuc_cluster_growth in MAM's microphysics package is tested in isolation.
Generating the input¶
The input to the subroutine newnuc_cluster_growth is obtained by exercising the full microphysics package in three representative cases:
| Case | T | p | z | PBL nuc. | Namelist file |
|---|---|---|---|---|---|
| 1 | 273 K | 1000 hPa | 500 m | On | nucgrowth_input4test_273K_PBL_on.nl |
| 2 | 273 K | 1000 hPa | 500 m | Off | nucgrowth_input4test_273K_PBL_off.nl |
| 3 | 233 K | 300 hPa | 9000 m | Off | nucgrowth_input4test_233K.nl |
Values of the input variables are archived 1280 time steps in each simulation. These values, together with various fixed parameters (constants), are written to the following YAML files by the script nucgrowth_input_txt2yaml.py.
The YAML files are used by the test driver described below.
Test driver¶
The test driver file is skywalker_mam_test_newnuc_growth.F90
in the mam_refactor code repository, located under
standalone/tests/nucleation/.
Test output: data and plots¶
After executing the test, the output data and plots
can be found in your build directory under standalone/tests/nucleation/.
Plots are generated by the script
standalone/tests/mam_x_validation/nucleation/nucgrowth_plots.py.
Reference results¶
Case 1 results
Changes in Aitken-mode number concentration per time step plotted agains various input quantities.
Changes in Aitken-mode mass mixing ratio per time step plotted agains various input quantities.
Case 2 results
Changes in Aitken-mode number concentration per time step plotted agains various input quantities.
Changes in Aitken-mode mass mixing ratio per time step plotted agains various input quantities.
Case 3 results
Changes in Aitken-mode number concentration per time step plotted agains various input quantities.
Changes in Aitken-mode mass mixing ratio per time step plotted agains various input quantities.
