{"id":2403,"date":"2019-10-23T16:09:37","date_gmt":"2019-10-23T20:09:37","guid":{"rendered":"https:\/\/www2.whoi.edu\/site\/itp\/?page_id=2403"},"modified":"2021-07-20T13:24:24","modified_gmt":"2021-07-20T17:24:24","slug":"itp52-data-processing","status":"publish","type":"page","link":"https:\/\/www2.whoi.edu\/site\/itp\/data\/completed-missions\/itp52\/itp52-data-processing\/","title":{"rendered":"ITP 052 Data Processing"},"content":{"rendered":"\r\n\t<h1>ITP52 Data Processing<\/h1>\r\n\t<p>The 378 profiles that were recovered from the ITP were processed according to the procedures described in the\u00a0<a href=\"https:\/\/www2.whoi.edu\/site\/itp\/wp-content\/uploads\/sites\/92\/2019\/08\/ITP_Data_Processing_Procedures_35803-1.pdf\">ITP Updated Data Processing Procedures<\/a>.\u00a0 The processing parameters for are shown in the figures to the right.\u00a0 The biosuite sensor data handling are described in Laney et al., (2014). Buoy drift speeds were almost always less than 30 cm\/s so the profiler covered nearly the full extent of nearly every profile that it communicated to the surface package, except for profiles 63 to 68, 367-370, and 378 which were influenced by excessive drift speeds.<i>\u00a0<\/i><\/p>\r\n<p>The temperature and salinity data were mostly free of obvious fouling. Only 9 profiles out of the first 365 had a large amount of bad salinity points (&gt;100) that were removed, but all of the salinities after profile 370 were corrupted.\u00a0 Thermohaline staircases were present during the time series in the deep profiles, enabling lag correction estimates. However, the lags were not typical and generally increased over the timeseries. The profile-to-profile potential conductivity corrections were mostly constant for the first 60 profiles, and then varied greatly for the remainder of the time series.\u00a0 Part of the variability is likely due to the fact that the short 200 m profiles could not be corrected to the deeper, more stable conductivity levels.\u00a0 Due to a problem with an internal seal on this generation of DO sensors, the sensor failed after profile 37.<\/p>\r\n<p>See the Data Products tab to the left for descriptions of the three levels (I, II, III) of data processing and to access all data.<\/p>\r\n<p>References:<\/p>\r\n<p>Laney, S.R., R.A. Krishfield, J.M. Toole, T.R. Hammar, C.J. Ashjian, and M.-L. Timmermans, 2014. Assessing Algal Biomass and Bio-optical Distributions in Perennially Ice-Covered Ocean Ecosystems.\u00a0<i>Polar Science<\/i>, Vol. 8,\u00a0<a href=\"http:\/\/dx.doi.org\/10.1016\/j.polar.2013.12.003\">http:\/\/dx.doi.org\/10.1016\/j.polar.2013.12.003<\/a>.<\/p>\r\n\t\t\t\t<a href=\"https:\/\/www2.whoi.edu\/site\/itp\/wp-content\/uploads\/sites\/92\/2019\/10\/itp52loc2_455239.jpg\" target=\"_self\" rel=\"noopener noreferrer\">\r\n\t\t\t\t<img loading=\"lazy\" src=\"https:\/\/www2.whoi.edu\/site\/itp\/wp-content\/uploads\/sites\/92\/2019\/10\/itp52loc2_455239.jpg\" alt=\"ITP surface buoy status.\" height=\"1730\" width=\"1000\" title=\"itp52loc2_455239\" \/>\r\n\t\t\t\t<\/a>\r\n\t\tITP surface buoy status.\r\n\t\t\t\t<a href=\"https:\/\/www2.whoi.edu\/site\/itp\/wp-content\/uploads\/sites\/92\/2019\/10\/itp52dat1_455257.jpg\" target=\"_self\" rel=\"noopener noreferrer\">\r\n\t\t\t\t<img loading=\"lazy\" src=\"https:\/\/www2.whoi.edu\/site\/itp\/wp-content\/uploads\/sites\/92\/2019\/10\/itp52dat1_455257.jpg\" alt=\"ITP profiler engineering data.\" height=\"1480\" width=\"1560\" title=\"itp52dat1_455257\" \/>\r\n\t\t\t\t<\/a>\r\n\t\tITP profiler engineering data.\r\n\t\t\t\t<a href=\"https:\/\/www2.whoi.edu\/site\/itp\/wp-content\/uploads\/sites\/92\/2019\/10\/itp52final1_513633.jpg\" target=\"_self\" rel=\"noopener noreferrer\">\r\n\t\t\t\t<img loading=\"lazy\" src=\"https:\/\/www2.whoi.edu\/site\/itp\/wp-content\/uploads\/sites\/92\/2019\/10\/itp52final1_513633.jpg\" alt=\"Number of bad points removed (top); variance of vertical difference of temperature and salinity in step region for up-going profiles; depth of staircase layer; temperature lag (bottom).\" height=\"2712\" width=\"2025\" title=\"itp52final1_513633\" \/>\r\n\t\t\t\t<\/a>\r\n\t\tNumber of bad points removed (top); variance of vertical difference of temperature and salinity in step region for up-going profiles; depth of staircase layer; temperature lag (bottom).\r\n\t\t\t\t<a href=\"https:\/\/www2.whoi.edu\/site\/itp\/wp-content\/uploads\/sites\/92\/2019\/10\/itp52final2_513653.jpg\" target=\"_self\" rel=\"noopener noreferrer\">\r\n\t\t\t\t<img loading=\"lazy\" src=\"https:\/\/www2.whoi.edu\/site\/itp\/wp-content\/uploads\/sites\/92\/2019\/10\/itp52final2_513653.jpg\" alt=\"Top: conductivity lag, Middle: conductivity thermal mass amplitude correction, Bottom: conductivity thermal mass lag correction.\" height=\"2724\" width=\"2060\" title=\"itp52final2_513653\" \/>\r\n\t\t\t\t<\/a>\r\n\t\tTop: conductivity lag, Middle: conductivity thermal mass amplitude correction, Bottom: conductivity thermal mass lag correction.\r\n\t\t\t\t<a href=\"https:\/\/www2.whoi.edu\/site\/itp\/wp-content\/uploads\/sites\/92\/2019\/10\/itp52final3_513673.jpg\" target=\"_self\" rel=\"noopener noreferrer\">\r\n\t\t\t\t<img loading=\"lazy\" src=\"https:\/\/www2.whoi.edu\/site\/itp\/wp-content\/uploads\/sites\/92\/2019\/10\/itp52final3_513673.jpg\" alt=\"Top: down pressure deviation correction, Middle: salinity ratio adjustment, Bottom: Number of filtered spikes.\" height=\"2716\" width=\"2040\" title=\"itp52final3_513673\" \/>\r\n\t\t\t\t<\/a>\r\n\t\tTop: down pressure deviation correction, Middle: salinity ratio adjustment, Bottom: Number of filtered spikes.\r\n\t\t\t\t<a href=\"https:\/\/www2.whoi.edu\/site\/itp\/wp-content\/uploads\/sites\/92\/2019\/10\/itp52final4_513693.jpg\" target=\"_self\" rel=\"noopener noreferrer\">\r\n\t\t\t\t<img loading=\"lazy\" src=\"https:\/\/www2.whoi.edu\/site\/itp\/wp-content\/uploads\/sites\/92\/2019\/10\/itp52final4_513693.jpg\" alt=\"Top: number of bad dissolved oxygen points removed, Middle: dissolved oxygen ratio adjustment, Bottom: Number of filtered spikes.\" height=\"2710\" width=\"2010\" title=\"itp52final4_513693\" \/>\r\n\t\t\t\t<\/a>\r\n\t\tTop: number of bad dissolved oxygen points removed, Middle: dissolved oxygen ratio adjustment, Bottom: Number of filtered spikes.\r\n","protected":false},"excerpt":{"rendered":"<p>ITP52 Data Processing The 378 profiles that were recovered from the ITP were processed according to the procedures described in the\u00a0ITP Updated Data Processing Procedures.\u00a0 The processing parameters for are shown in the figures to the right.\u00a0 The biosuite sensor data handling are described in Laney et al., (2014). Buoy drift speeds were almost always&hellip;<\/p>\n","protected":false},"author":83,"featured_media":0,"parent":2387,"menu_order":2,"comment_status":"closed","ping_status":"closed","template":"tpl-sidebar.php","meta":{"advanced-sidebar-menu\/link-title":"","advanced-sidebar-menu\/exclude-page":false},"_links":{"self":[{"href":"https:\/\/www2.whoi.edu\/site\/itp\/wp-json\/wp\/v2\/pages\/2403"}],"collection":[{"href":"https:\/\/www2.whoi.edu\/site\/itp\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/www2.whoi.edu\/site\/itp\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/www2.whoi.edu\/site\/itp\/wp-json\/wp\/v2\/users\/83"}],"replies":[{"embeddable":true,"href":"https:\/\/www2.whoi.edu\/site\/itp\/wp-json\/wp\/v2\/comments?post=2403"}],"version-history":[{"count":3,"href":"https:\/\/www2.whoi.edu\/site\/itp\/wp-json\/wp\/v2\/pages\/2403\/revisions"}],"predecessor-version":[{"id":3598,"href":"https:\/\/www2.whoi.edu\/site\/itp\/wp-json\/wp\/v2\/pages\/2403\/revisions\/3598"}],"up":[{"embeddable":true,"href":"https:\/\/www2.whoi.edu\/site\/itp\/wp-json\/wp\/v2\/pages\/2387"}],"wp:attachment":[{"href":"https:\/\/www2.whoi.edu\/site\/itp\/wp-json\/wp\/v2\/media?parent=2403"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}