{"action":"created","issue":{"url":"https://api.github.com/repos/StrikeNP/trac_test/issues/466","repository_url":"https://api.github.com/repos/StrikeNP/trac_test","labels_url":"https://api.github.com/repos/StrikeNP/trac_test/issues/466/labels{/name}","comments_url":"https://api.github.com/repos/StrikeNP/trac_test/issues/466/comments","events_url":"https://api.github.com/repos/StrikeNP/trac_test/issues/466/events","html_url":"https://github.com/StrikeNP/trac_test/issues/466","id":332177226,"node_id":"MDU6SXNzdWUzMzIxNzcyMjY=","number":466,"title":"Tune parameters in order to improve s12 and rf01_fixed_sst at coarse resolution (Trac #466)","user":{"login":"StrikeNP","id":2577059,"node_id":"MDQ6VXNlcjI1NzcwNTk=","avatar_url":"https://avatars0.githubusercontent.com/u/2577059?v=4","gravatar_id":"","url":"https://api.github.com/users/StrikeNP","html_url":"https://github.com/StrikeNP","followers_url":"https://api.github.com/users/StrikeNP/followers","following_url":"https://api.github.com/users/StrikeNP/following{/other_user}","gists_url":"https://api.github.com/users/StrikeNP/gists{/gist_id}","starred_url":"https://api.github.com/users/StrikeNP/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/StrikeNP/subscriptions","organizations_url":"https://api.github.com/users/StrikeNP/orgs","repos_url":"https://api.github.com/users/StrikeNP/repos","events_url":"https://api.github.com/users/StrikeNP/events{/privacy}","received_events_url":"https://api.github.com/users/StrikeNP/received_events","type":"User","site_admin":false},"labels":[{"id":963997231,"node_id":"MDU6TGFiZWw5NjM5OTcyMzE=","url":"https://api.github.com/repos/StrikeNP/trac_test/labels/Migrated%20from%20Trac","name":"Migrated from Trac","color":"FFFFFF","default":false},{"id":963997516,"node_id":"MDU6TGFiZWw5NjM5OTc1MTY=","url":"https://api.github.com/repos/StrikeNP/trac_test/labels/clubb_src","name":"clubb_src","color":"FFFFFF","default":false},{"id":963998767,"node_id":"MDU6TGFiZWw5NjM5OTg3Njc=","url":"https://api.github.com/repos/StrikeNP/trac_test/labels/meyern@uwm.edu","name":"meyern@uwm.edu","color":"FFFFFF","default":false},{"id":963997380,"node_id":"MDU6TGFiZWw5NjM5OTczODA=","url":"https://api.github.com/repos/StrikeNP/trac_test/labels/task","name":"task","color":"FFFFFF","default":false}],"state":"open","locked":false,"assignee":null,"assignees":[],"milestone":{"url":"https://api.github.com/repos/StrikeNP/trac_test/milestones/7","html_url":"https://github.com/StrikeNP/trac_test/milestone/7","labels_url":"https://api.github.com/repos/StrikeNP/trac_test/milestones/7/labels","id":3423174,"node_id":"MDk6TWlsZXN0b25lMzQyMzE3NA==","number":7,"title":"Improve CLUBB's accuracy at coarse vertical grid spacing","description":null,"creator":{"login":"StrikeNP","id":2577059,"node_id":"MDQ6VXNlcjI1NzcwNTk=","avatar_url":"https://avatars0.githubusercontent.com/u/2577059?v=4","gravatar_id":"","url":"https://api.github.com/users/StrikeNP","html_url":"https://github.com/StrikeNP","followers_url":"https://api.github.com/users/StrikeNP/followers","following_url":"https://api.github.com/users/StrikeNP/following{/other_user}","gists_url":"https://api.github.com/users/StrikeNP/gists{/gist_id}","starred_url":"https://api.github.com/users/StrikeNP/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/StrikeNP/subscriptions","organizations_url":"https://api.github.com/users/StrikeNP/orgs","repos_url":"https://api.github.com/users/StrikeNP/repos","events_url":"https://api.github.com/users/StrikeNP/events{/privacy}","received_events_url":"https://api.github.com/users/StrikeNP/received_events","type":"User","site_admin":false},"open_issues":17,"closed_issues":19,"state":"open","created_at":"2018-06-13T20:02:02Z","updated_at":"2018-06-15T04:43:24Z","due_on":null,"closed_at":null},"comments":33,"created_at":"2018-06-13T21:49:43Z","updated_at":"2018-06-15T04:44:35Z","closed_at":null,"author_association":"OWNER","body":"I have felt for a while that wp3 is too dependent on the buoyancy term, wp2thvp.  A way to reduce this dependency is to increase the value of C11 and/or C11b.  However, this will probably damp wp3 too much.  We can compensate by reducing wp3's other damping term, C8 (https://github.com/larson-group/clubb/issues/409).  \n\nLet's start by raising the domain top of all cases (ticket:465), then zeroing out C8b in CLUBB standalone (cpt:https://github.com/larson-group/clubb/issues/96), and then plotgenning the results at 48 and 128 levels.  Make sure that rf01_fixed_sst is included in the plots.  (Of course, one hazard of this is that spurious maxima in wp3 will be less damped (cpt:https://github.com/larson-group/clubb/issues/79), but those spikes\n\nA next step would be to reduce C8 itself, and then increase C11 and/or C11b if necessary.  The goal is to improve wp3 in the subcloud layer and to allow Sc to be better maintained.\n\nAttachments:\n\n[31_lev_1_min_step_skw_denom_coef_1.maff](https://github.com/larson-group/trac_attachment_archive/blob/master/clubb/31_lev_1_min_step_skw_denom_coef_1.maff)\n[31_lev_1_min_step_skw_denom_coef_10.maff](https://github.com/larson-group/trac_attachment_archive/blob/master/clubb/31_lev_1_min_step_skw_denom_coef_10.maff)\n[48_lev_skw_denom_coef_1.maff](https://github.com/larson-group/trac_attachment_archive/blob/master/clubb/48_lev_skw_denom_coef_1.maff)\n[48_lev_1_min_step_skw_denom_coef_10.maff](https://github.com/larson-group/trac_attachment_archive/blob/master/clubb/48_lev_1_min_step_skw_denom_coef_10.maff)\n\nMigrated from http://carson.math.uwm.edu/trac/clubb/ticket/466\n```json\n{\n    \"status\": \"closed\", \n    \"changetime\": \"2012-05-23T19:30:39\", \n    \"description\": \"I have felt for a while that wp3 is too dependent on the buoyancy term, wp2thvp.  A way to reduce this dependency is to increase the value of C11 and/or C11b.  However, this will probably damp wp3 too much.  We can compensate by reducing wp3's other damping term, C8 (comment:18:ticket:409).  \\n\\nLet's start by raising the domain top of all cases (ticket:465), then zeroing out C8b in CLUBB standalone (cpt:comment:3:ticket:96), and then plotgenning the results at 48 and 128 levels.  Make sure that rf01_fixed_sst is included in the plots.  (Of course, one hazard of this is that spurious maxima in wp3 will be less damped (cpt:comment:17:ticket:79), but those spikes\\n\\nA next step would be to reduce C8 itself, and then increase C11 and/or C11b if necessary.  The goal is to improve wp3 in the subcloud layer and to allow Sc to be better maintained.\", \n    \"reporter\": \"vlarson@uwm.edu\", \n    \"cc\": \"vlarson@uwm.edu\", \n    \"resolution\": \"fixed\", \n    \"_ts\": \"1337801439410109\", \n    \"component\": \"clubb_src\", \n    \"summary\": \"Tune parameters in order to improve s12 and rf01_fixed_sst at coarse resolution\", \n    \"priority\": \"major\", \n    \"keywords\": \"\", \n    \"time\": \"2011-11-02T20:50:56\", \n    \"milestone\": \"Improve CLUBB's accuracy at coarse vertical grid spacing\", \n    \"owner\": \"meyern@uwm.edu\", \n    \"type\": \"task\"\n}\n```\n"},"comment":{"url":"https://api.github.com/repos/StrikeNP/trac_test/issues/comments/397512081","html_url":"https://github.com/StrikeNP/trac_test/issues/466#issuecomment-397512081","issue_url":"https://api.github.com/repos/StrikeNP/trac_test/issues/466","id":397512081,"node_id":"MDEyOklzc3VlQ29tbWVudDM5NzUxMjA4MQ==","user":{"login":"StrikeNP","id":2577059,"node_id":"MDQ6VXNlcjI1NzcwNTk=","avatar_url":"https://avatars0.githubusercontent.com/u/2577059?v=4","gravatar_id":"","url":"https://api.github.com/users/StrikeNP","html_url":"https://github.com/StrikeNP","followers_url":"https://api.github.com/users/StrikeNP/followers","following_url":"https://api.github.com/users/StrikeNP/following{/other_user}","gists_url":"https://api.github.com/users/StrikeNP/gists{/gist_id}","starred_url":"https://api.github.com/users/StrikeNP/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/StrikeNP/subscriptions","organizations_url":"https://api.github.com/users/StrikeNP/orgs","repos_url":"https://api.github.com/users/StrikeNP/repos","events_url":"https://api.github.com/users/StrikeNP/events{/privacy}","received_events_url":"https://api.github.com/users/StrikeNP/received_events","type":"User","site_admin":false},"created_at":"2018-06-15T04:44:35Z","updated_at":"2018-06-15T04:44:35Z","author_association":"OWNER","body":"**Trac update on 2011/12/20 at 12:03**\n**vlarson@uwm.edu commented:**\n\nReplying to [comment:33 meyern@…]:\n> I noticed that at 31 levels, rtp2 was collapsing early in the rf01_fixed_sst simulation and then alternating between a zero profile and a more normal profile.  To solve this, I ran the case at a 1 minute timestep instead of a 5 minute timestep, which help the simulation significantly.  Plots at 31 and 48 levels can be found below:\n> [http://www.larson-group.com/meyernr/protected/31_lev_1_min_step.maff 31 level]\n> [http://www.larson-group.com/meyernr/protected/48_lev_1_min_step.maff 48 level]\n> \n> At 31 levels, the simulation looks improved as rtp2 is no longer collapsing.\n> \n> At 48 levels, there is no improvement in rf01_fixed_sst.  We looked at the output and noticed that wp3 began to increase and kills the cloud in this simulation.\n\n\nPerhaps wp3 increases because just below the (stably stratified) inversion, wp2 goes to zero.  This makes Skw large, even though wp3 is small.  (Is this true?)  Because Skw is large, C11_Skw_func drops, thereby reducing the damping on wp3, thereby causing wp3 to increase.\n\nIn function Skw_func, I'd replace\n\n```text\n    Skw = wp3 / ( max( wp2, w_tol_sqd ) )**1.5\n```\nwith\n\n```text\n    Skw = wp3 / ( max( wp2, Skw_denom_coef * w_tol_sqd ) )**1.5\n```\nwhere Skw_denom_coef is some coefficient --- e.g. 2, 10, or 100, etc. --- which is designed to drive Skw toward zero whenever both wp2 and wp3 are small.  \n\n\n"}}
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