I added codes to decay the passive tracer in step3d_t.F, as shown in the figure. And I set a cpp option in .h file. When I ran the case, the screen displayed as follow: There is no cpp option of TRACER DECAY in the log. I am curious about if the cpp option works? Is there a way to prove that these codes have taken effect?(expcet run the case twice) And can I add the new cpp option through the above method?
Thanks for your attention and looking forward your reply!
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
