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What does it mean diff_opt = -1?


New member

According to your website (Namelist Variables — WRF Users Guide documentation), the default option for diff_opt is -1. However, there is no explanation about what that means. I have checked the registry files Registry.CONVERT and Registry.EM_COMMON, and I have seen that the default option of diff_opt is indeed -1. Could you please explain what this value does?

Thanks in advance.