Dear all,

Using the default namelist settings from Regcm45 code zip, I conducted some experiments with dust scheme, but the aod value from output *STS*.nc file is extremely high, and the max aod value reachs the level of 1e3 and even 1e30 . And I also found the the burden is extremely high when the aod is extremely high.

Besides, I also tried to use other settings, such as using CLM45 with dust scheme instead of BATS , or different moisture scheme and cumulus convection scheme, but the high AOD value still existed.

Appendix: the detail information of the script :regcm.in and others (you can download in the added appendixs)

I want to know how this happens and what I can do to solve this problem. And what is the normal range of aod values in the regcm4 output.

Thank you in advance.

Best regards,

Xiaoxun Xie

Ph.D Student of Environmental Science

Institute of Earth Environment, CAS