Integrator error code : -5, STOP at INTEGRATE_KPP

[zkkk0218]

Your name

kun zhang

Your affiliation

Southern University of Science and Technology

What happened? What did you expect to happen?

I am running the standard version of GC12.9.3 nested grid, and now I have encountered the problem that T and H are 0.

AbsTol( 2 ) = 0.000000000000000E+000

INTEGRATE RETURNED ERROR AT: 4 4 27

RelTol( 2 ) = 1.000000000000000E-002
GEOS-CHEM ERROR: Integrator error code : -5
RelTol( 2 ) = 1.000000000000000E-002
STOP at INTEGRATE_KPP

RTOL and ATOL have adjusted it for many times but failed to solve it. Do you know the solution? Thank you!

What are the steps to reproduce the bug?

1. Run GC12.9.3global with a resolution of 4*5 and output boundary conditions
2. Run the nested grid with a resolution of 0.25x0.3125.

Please attach any relevant configuration and log files.

[
173414.log
](url)

What GEOS-Chem version were you using?

12.9.3

What environment were you running GEOS-Chem on?

Personal computer

What compiler and version were you using?

Intel Fortran Compiler

Will you be addressing this bug yourself?

No

In what configuration were you running GEOS-Chem?

GCClassic

What simulation were you running?

Full chemistry

As what resolution were you running GEOS-Chem?

0.25x0.3125

What meterology fields did you use?

GEOS-FP

Additional information

No response

[yantosca]

Thanks for writing @zkkk0218. We no longer support version 12.9.3. There have been several updates to the chemistry mechanism since this version. We would encourage you to update to the latest version (14.4.1 as of this time).

[yantosca]

@zkkk0218: Very often in the nested-grid simulations, a KPP integration error can be caused by boundary conditions containing nonrealistic concentrations. You can try changing the buffer values in the nested grid menu of geoschem_config.yml from [3,3,3,3] to [6,6,6,6]. This will reduce the size of the window in which chemistry will be performed, and thus hopefully prevent unphysical concentrations from the boundary conditions from affecting the chemistry.

[zkkk0218]

Thanks for your advice @yantosca! But I still get the same error after trying this method.