GEOS-Chem version 14.3.1, CH4 simulation, The “CH4emission” variable in “GEOSChem.Metrics” was not saved.

[XunZhangNJU]

Your name

XunZhang

Your affiliation

Nanjing University

What happened? What did you expect to happen?

When I ran GEOS-Chem for global CH4 concentrations and used metrics.py to calculate CH4 lifetime, I found that the CH4 total lifetime had no values.

What are the steps to reproduce the bug?

The results of running metrics.py are shown in the following screenshot.

When I test the data, I find that the variable named CH4emission in the GEOSChem.Metrics file has no data. However, I have selected to save this variable in the HISTORY.rc file. How can I solve this problem?

Please attach any relevant configuration and log files.

HEMCO_Config.rc.gmao_metfields.txt
HEMCO_Config.rc.txt
HISTORY.rc.txt
HEMCO_Diagn.rc.txt
geoschem_config.yml.txt

What GEOS-Chem version were you using?

14.3.1

What environment were you running GEOS-Chem on?

Local cluster

What compiler and version were you using?

ifort 2023

Will you be addressing this bug yourself?

Yes

In what configuration were you running GEOS-Chem?

GCClassic

What simulation were you running?

CH4

As what resolution were you running GEOS-Chem?

4x5

What meterology fields did you use?

MERRA-2

Additional information

No response

[yantosca]

Thanks for writing @XunZhangNJU. The OH metrics for the carbon simulation depend on a fixed OH, so some of those metrics might not make as much sense. Tagging @msulprizio.

[msulprizio]

@yantosca is correct. We need to reevaluate these diagnostics for the carbon/CH4 simulations and perhaps do these calculations offline via GCPy.