*2021/09/14 08:57:15.97 *IOS HEADER VERSION 2.0 2016/04/28 2016/06/13 IVF16 *FILE START TIME : UTC 2021/05/15 00:56:58.000 TIME INCREMENT : 0 0 0 0.416667E-01 0 ! (day hr min sec ms) NUMBER OF RECORDS : 34 DATA DESCRIPTION : CTD FILE TYPE : ASCII CRC : 6E69B6C8 NUMBER OF CHANNELS : 10 $TABLE: CHANNELS ! No Name Units Minimum Maximum !--- ----------------------------- --------------- -------------- -------------- 1 Pressure:CTD dbar 3 35.9 2 Temperature:CTD deg_C_(ITS90) 7.3216 9.3458 3 Salinity:CTD PSS-78 23.1798 31.4129 4 Sigma-t:CTD kg/m^3 17.8592 24.5775 5 Transmissivity:CTD:650 %/m 9.3 31.5 6 Transmissivity:CTD:530 %/m 7.8 41.1 7 Oxygen:Dissolved:CTD:Volume ml/l 6.3 7.08 8 Oxygen:Dissolved:CTD:Mass µmol/kg 274.4 310.8 9 Fluorescence:CTD:Seapoint mg/m^3 0.183 0.884 10 PAR:CTD µE/m^2/sec 0 140.7 $END $TABLE: CHANNEL DETAIL ! No Pad Start Width Format Type Decimal_Places !--- ---- ----- ----- ------ ---- -------------- 1 -99 ' ' 7 F ' ' 1 2 -99 ' ' 9 F ' ' 4 3 -99 ' ' 9 F ' ' 4 4 -99 ' ' 9 F R4 4 5 -99 ' ' 6 F ' ' 1 6 -99 ' ' 6 F ' ' 1 7 -99 ' ' 7 F ' ' 2 8 -99 ' ' 6 F ' ' 1 9 -99 ' ' 8 F ' ' 3 10 -99 ' ' 7 F ' ' 1 $END *ADMINISTRATION MISSION : 2021-006 AGENCY : IOS, Ocean Sciences Division, Sidney, B.C. COUNTRY : Canada PROJECT : Line P SCIENTIST : Robert M. PLATFORM : John P. Tully *LOCATION GEOGRAPHIC AREA : North-East Pacific STATION : PRHR74 EVENT NUMBER : 129 LATITUDE : 54 13.53000 N ! (deg min) LONGITUDE : 130 21.09000 W ! (deg min) WATER DEPTH : 42 *INSTRUMENT TYPE : Sea-Bird CTD MODEL : SBE-911plus SERIAL NUMBER : 0443 LOCATION : Mid-ship ! custom item *COMMENTS CTDEDIT was used to remove some near-surface records and records corrupted by shed wakes near the bottom of the cast. Data Processing Notes: ---------------------- Transmissivity, Fluorescence and PAR data are nominal and unedited except that some records were removed in editing temperature and salinity. There were 2 WetLabs CStar transmissometers in use during this cruise: Transmissometer:CTD:530 refers to sensor #1883DG (530nm - green) Transmissometer:CTD:650 refers to sensor #1185DR (650nm - red) For comparison with other Institute of Ocean Sciences cruises, note that the transmissometer wavelength is 650 nm unless otherwise stated. NOTE: While the CTD fluorescence data are expressed in concentration units, they do not always compare well to extracted chlorophyll samples, particularly for casts far from shore. It is recommended that users check extracted chlorophyll values where available. The Fluorescence:CTD channel was removed from the CTD files for events 0001 to 0015 due to excessive noise. The problem was resolved when a Y-cable was replaced before event 0016. Data collected during bottle stops looked better, so the channel is included in CHE files. Oxygen:Dissolved:CTD was calibrated using the method described in Sea-Bird Application Note #64-2, June 2012 revision (Sea-Bird_64-2_Jun2012.pdf), except that a small offset in the fit was allowed. The Oxygen:Dissolved:CTD sensor has a fairly long response time so data accuracy is not as high when it is in motion as it is during stops for bottles. This will be especially true when vertical dissolved oxygen gradients are large. To get an estimate of the accuracy of the Oxygen:Dissolved:CTD data during downcasts (after recalibration) a rough comparison was made between downcast Oxygen:Dissolved:CTD data and upcast titrated samples. Much of the difference will be due to problems with flushing of Niskin bottles and/or analysis errors, so the following statement likely underestimates Oxygen:Dissolved:CTD accuracy. Downcast (CTD files) Oxygen:Dissolved:CTD data for this cruise are considered, very roughly, to be ±3% except in areas of very large DO gradients, especially at the base of the mixed layer. For details on the processing see document 2021-006-proc.pdf. !--1--- ---2---- ---3---- ---4---- --5-- --6-- --7--- --8-- ---9--- --10-- !Pressu Temperat Salinity Sigma-t: Trans Trans Oxygen Oxyge Fluores PAR: !re:CTD ure:CTD :CTD CTD missi missi :Disso n:Dis cence: CTD ! vity: vity: lved: solve CTD: ! CTD: CTD: CTD: d:CTD Seapoin ! 650 530 Volume :Mass t !------ -------- -------- -------- ----- ----- ------ ----- ------- ------ *END OF HEADER 3.0 9.3458 23.1798 17.8592 9.3 7.8 7.08 310.8 0.884 140.7 4.0 9.1921 23.5716 18.1857 10.4 8.6 7.02 307.8 0.799 60.9 5.0 9.0905 24.3273 18.7890 11.5 8.9 6.93 303.9 0.846 28.1 6.0 8.5723 26.0230 20.1838 16.6 9.8 6.87 300.7 0.794 13.9 7.0 8.2954 26.6749 20.7309 17.0 14.1 6.81 298.1 0.794 7.3 8.0 8.1037 27.3868 21.3138 15.1 18.0 6.76 295.7 0.870 4.1 9.0 7.9485 28.3062 22.0549 21.1 18.9 6.71 293.4 0.832 2.4 10.0 7.8895 28.5762 22.2744 24.5 23.5 6.69 292.2 0.883 1.5 11.0 7.8115 28.9196 22.5541 24.0 27.9 6.66 291.1 0.852 0.9 12.0 7.7278 29.4059 22.9468 28.3 30.2 6.63 289.4 0.815 0.6 13.0 7.6137 29.9753 23.4090 28.7 35.1 6.57 286.8 0.762 0.4 14.0 7.5539 30.2702 23.6485 29.6 38.7 6.54 285.2 0.697 0.3 15.0 7.4738 30.6751 23.9773 29.1 39.3 6.51 283.8 0.570 0.2 16.0 7.4674 30.7224 24.0153 29.2 37.6 6.50 283.4 0.439 0.2 17.0 7.4677 30.7369 24.0266 30.1 38.6 6.50 283.4 0.355 0.1 18.0 7.4674 30.7401 24.0292 30.4 39.1 6.50 283.7 0.315 0.1 19.0 7.4672 30.7449 24.0330 30.6 39.6 6.50 283.6 0.286 0.1 20.0 7.4686 30.7498 24.0366 30.9 40.0 6.50 283.4 0.260 0.0 21.0 7.4694 30.7504 24.0370 30.9 40.1 6.49 283.3 0.248 0.0 22.0 7.4695 30.7570 24.0422 30.9 40.4 6.49 283.2 0.235 0.0 23.0 7.4658 30.7796 24.0604 31.4 40.3 6.49 282.9 0.231 0.0 24.0 7.4536 30.8376 24.1076 31.5 40.9 6.47 282.4 0.219 0.0 25.0 7.4419 30.9245 24.1775 31.2 41.1 6.47 282.0 0.208 0.0 26.0 7.4356 31.0296 24.2609 30.3 40.6 6.45 281.3 0.204 0.0 27.0 7.4335 31.0659 24.2897 29.5 39.5 6.44 280.9 0.204 0.0 28.0 7.4311 31.0735 24.2960 29.3 38.9 6.44 280.8 0.208 0.0 29.0 7.4306 31.0958 24.3136 28.8 38.1 6.44 280.8 0.205 0.0 30.0 7.4326 31.0970 24.3143 28.9 37.7 6.43 280.4 0.197 0.0 31.0 7.4321 31.1217 24.3337 29.5 37.5 6.41 279.7 0.187 0.0 32.0 7.4137 31.1832 24.3846 28.9 37.7 6.39 278.5 0.183 0.0 33.0 7.3903 31.2458 24.4369 26.3 37.1 6.35 277.0 0.183 0.0 34.0 7.3663 31.3066 24.4879 23.1 35.5 6.32 275.5 0.183 0.0 35.0 7.3325 31.3910 24.5588 20.9 32.3 6.30 274.4 0.183 0.0 35.9 7.3216 31.4129 24.5775 17.9 29.0 6.30 274.7 0.187 0.0