<html><head><meta http-equiv="Content-Type" content="text/html; charset=utf-8"></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; line-break: after-white-space;" class=""><div><blockquote type="cite" class=""><div class=""><blockquote type="cite" style="font-family: SFMono-Regular; font-size: 12px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none;" class=""><br class="">4) The MY82 package does not allow using the convective adjustment (cAdjFreq) and ivdc_kappa. Does it mean that the MY in MITgcm works fine with vertical instability cases? Actually, it should, as follows from J. Mellor's papers, but this question arose when I was investigating the GGL90 code, where I found the line "convective adjustment might be needed even with ggl90"…<br class=""></blockquote><span style="caret-color: rgb(0, 0, 0); font-family: SFMono-Regular; font-size: 12px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration: none; float: none; display: inline !important;" class="">Why do you want to use the MY82 package? I’d prefer GGL90 or KPP (although at your resolution, KPP might be noisy (see this thread <</span><a href="http://mailman.mitgcm.org/pipermail/mitgcm-support/2020-April/012427.html" style="font-family: SFMono-Regular; font-size: 12px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px;" class="">http://mailman.mitgcm.org/pipermail/mitgcm-support/2020-April/012427.html</a><span style="caret-color: rgb(0, 0, 0); font-family: SFMono-Regular; font-size: 12px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration: none; float: none; display: inline !important;" class="">>).</span><br style="caret-color: rgb(0, 0, 0); font-family: SFMono-Regular; font-size: 12px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration: none;" class=""><span style="caret-color: rgb(0, 0, 0); font-family: SFMono-Regular; font-size: 12px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration: none; float: none; display: inline !important;" class="">You can just comment out the stop-statement in the code and use MY82 with other convective adjustment, but it should (like GGL90) remove the instabilities, because it’s also Richardson number based. MY82 is not really used that much (at all?).</span><br style="caret-color: rgb(0, 0, 0); font-family: SFMono-Regular; font-size: 12px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration: none;" class=""></div></blockquote></div><br class=""><div class="">Right, when the Richardson number goes to less than 1/4, the diffusivity and viscoisity goes to infinity, or more practically, to a capping value. </div><div class=""><br class=""></div><div class="">You may also look at KL10 for these scales, which only puts dissipation into overturns, but tries to do so in an energetically consistent way.</div><div class=""><br class=""></div><div class="">Cheers, Jody</div></body></html>