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--></style></head><body lang=EN-US link="#0563C1" vlink="#954F72"><div class=WordSection1><p class=MsoNormal>Hi everyone, <o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>I have been using ptracers, but only with RBCS to restore the surface BC as a source. However, this only allows a fixed location for surface input. <o:p></o:p></p><p class=MsoNormal>I am wondering if the following is possible, potentially with/without RBCS. <o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>1. Change the locations of surface source of ptracers while the code is running. The locations are based on other output. <o:p></o:p></p><p class=MsoNormal>2. If the above is plausible, link the ptracers surface BC with the continuous changes of sea ice cover. <o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>These might need modifications in the code. My goal is to enforce ptracers=1 on the surface, when the sea ice cover percentage at that location is below a certain level. Is there any reference to it? I see some words mentioning this in gchem pkg, but I am unfamiliar with it. <o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>Thank you very much. <o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>Best,<o:p></o:p></p><p class=MsoNormal>Yilang <o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p></div></body></html>