*2021/05/31 15:27:51.32 *IOS HEADER VERSION 2.0 2016/04/28 2016/06/13 IVF16 *FILE START TIME : UTC 2019/08/16 04:13:41.000 TIME INCREMENT : 0 0 0 0.416667E-01 0 ! (day hr min sec ms) NUMBER OF RECORDS : 24 DATA DESCRIPTION : Bottle:Rosette:Up:Stop + CTD:Up FILE TYPE : ASCII CRC : EADE2659 NUMBER OF CHANNELS : 13 $TABLE: CHANNELS ! No Name Units Minimum Maximum !--- ----------------------------- --------------- -------------- -------------- 1 Sample_Number n/a 109 132 2 Bottle_Number n/a 1 24 3 Bottle:Firing_Sequence n/a 1 24 4 Pressure:CTD dbar 200.1 500.4 5 Temperature:CTD deg_C_(ITS90) 4.9481 7.2839 6 Salinity:CTD PSS-78 33.9175 34.076 7 Sigma-t:CTD kg/m^3 26.5527 26.9744 8 Transmissivity:CTD:650 %/m 56.7 57.4 9 Transmissivity:CTD:530 %/m 86.4 87.7 10 Oxygen:Dissolved:CTD:Volume ml/l 0.79 2.73 11 Oxygen:Dissolved:CTD:Mass µmol/kg 34.2 118.9 12 Fluorescence:CTD:Seapoint mg/m^3 0.98E-01 0.113 13 PAR:CTD µE/m^2/sec 0 0 $END $TABLE: CHANNEL DETAIL ! No Pad Start Width Format Type Decimal_Places !--- ---- ----- ----- ------ ---- -------------- 1 -99 ' ' 5 I I 0 2 -99 ' ' 3 I I 0 3 -99 ' ' 3 I I 0 4 -99 ' ' 7 F ' ' 1 5 -99 ' ' 9 F ' ' 4 6 -99 ' ' 9 F ' ' 4 7 -99 ' ' 9 F R4 4 8 -99 ' ' 6 F ' ' 1 9 -99 ' ' 6 F ' ' 1 10 -99 ' ' 7 F ' ' 2 11 -99 ' ' 6 F ' ' 1 12 -99 ' ' 8 F ' ' 3 13 -99 ' ' 7 F ' ' 1 $END *ADMINISTRATION MISSION : 2019-008 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 : P4 EVENT NUMBER : 19 LATITUDE : 48 38.93000 N ! (deg min) LONGITUDE : 126 39.91000 W ! (deg min) WATER DEPTH : 1324 *INSTRUMENT TYPE : Sea-Bird CTD MODEL : SBE-911plus SERIAL NUMBER : 0506 LOCATION : Mid-ship ! custom item *COMMENTS Analysis methods: ----------------- Salinity samples were collected in 200 ml type ll glass bottles with disposable nylon inserts and screw caps supplied by Ocean Scientific International Limited. They were analyzed in a temperature-controlled lab on a Guildline 8400B Salinometer standardized with IAPSO standard seawater 13 - 25 days after collection. For details on duplicate analysis see file 2019-008_SAL.pdf. Oxygen samples were analyzed at sea using an automated Winkler titration system (Metrohm Dosimat model 876 and a UV light source and detector with a 365nm filter controlled by LV02_876 software designed and constructed by Scripps Institution of Oceanography) with modifications based on Carpenter (1965) and adhering to WOCE protocols (Culberson 1991). For details on duplicate analysis see file 2019-008_OXY.pdf. Nutrient samples were collected in plastic tubes. One set of samples was collected and immediately quick frozen in aluminum blocks stored in -20 freezer. Another set of samples from 400 dbar and deeper (to be used for silicate analysis) was collected and stored at 4C in the dark. All samples were returned to IOS for analysis using an Astoria analyzer following methods described in IOS Nutrient Methods (1996) Barwell-Clarke and Whitney. For precision and duplicate analysis see file 2019-008_NUT.pdf. Chlorophyll samples were filtered onto 25mm GF/F filters and stored in glass scintillation vials at -80C prior to analysis. Samples were extracted in 90% acetone at -20C for 24 hours and analyzed on a Turner 10AU fluorometer calibrated with commercially pure chlorophyll a standard (Sigma). Fluorescence readings taken before and after acidification were used to calculate chlorophyll and phaeopigment concentrations (Holm-Hansen et al 1965). Chlorophyll samples were analyzed at IOS ~2 weeks after the cruise. When duplicate samples were collected the average of two samples is reported. Variability is assessed as the CV% (std dev / mean*100). Flags and comments apply to chlorophyll values only. No flags or comments are assigned for Phaeopigment values. Precision Statement: Chlorophyll values ranged from 0.03-10.66 µg/l in 115 samples. Average %CV for this cruise was 2.80% with 0 out of 35 duplicate pairs having a CV > 10% and 0 duplicate pairs having a CV > 30%. Our average dataset %CV is 3.80% for 2013 - 2018 so the overall quality of this dataset is excellent. For details on duplicates see file 2019-008_CHL.pdf. DMS samples were collected in 250 ml ground glass stoppered bottles and stored in a fridge, in the dark and removed one at a time before analysis. A sample was loaded onto the stripper and purged with UHP Nitrogen for 10 minutes at ~100 ml/min. The DMS was extracted from the water and absorbed on to a Tenax TA trap kept at -80C. The trap was subsequently desorbed at 100C (with a Dewar containing boiling water) onto a Chromosil 330 column which eluted onto a Flame Photometric Detector (FPD). All samples were run as soon as possible after being collected. The minimum detectable level for DMS is 0.10 nmol/l, so “0” values should be interpreted as < 0.1 nmol/l. DMS data are limited to 2 significant figures. Unless otherwise indicated the % relative difference between duplicates is < 20%. For more details see file 2019-008_DMS_report.pdf and for duplicate analysis see 2019-008_DMS.pdf. DMSP-D: Approximately 20-75 ml of seawater were allowed to flow directly from the Niskin into a magnetic filtration funnel containing a 0.7 µm GF/F filter. The first 3.5 ml were collected in a polypropylene tube (15 ml) containing 50 µl of a 50% sulphuric acid solution. A new funnel and filter were used for each sample. Samples were hydrolized and run at IOS when time permitted. DMSP-T: 3.5 ml of seawater were collected directly from the Niskin into a polypropylene tube (15 ml) containing 50 µl of a 50% sulphuric acid solution. DMSP-D and DMSP-T: Samples were stored in the dark at 4 degrees C for a minimum of 24 hours. They were hydrolized and analyzed later at the Institute of Ocean Sciences. The minimum detectable level is 0.1 nmol/l, so “0” values should be interpreted as < 0.1 nmol/l. DMSP data are limited to 2 significant figures. Unless otherwise indicated the % relative difference between duplicates is < 20%. For more details see file 2019-008_DMS_report.pdf and for duplicate analysis see 2019-008_DMSP.pdf. References: 1. Holm-Hansen, O., Lorenzen, C.J., Holmes, R.W., and Strickland J.D.H. 1965. Fluorometric Determination of Chlorophyll. J.du Cons. Intl. Pour l’Epl. De la Mer. 30:3-15. 2. Carpenter, J.H. 1965. The Chesapeake Bay Institute Technique for the Winkler Dissolved Oxygen Method. Limmnol. & Oceanogr., 10: 141-143. 3. Culberson, C.H. 1991. Dissolved oxygen. WOCE Hydrographic Programme Operations and Methods (July 1991). 15pp. 4. Barwell-Clarke, J. and Whitney, F. 1996. Institute of Ocean Sciences Nutrient Methods and Analysis. Canadian Technical Report of Hydrography and Ocean Sciences, No. 182, 43 pp. 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:650 refers to sensor #1185DR (650nm - red) Transmissometer:CTD:530 refers to sensor #1883DG (530nm - green) For comparison with other Institute of Ocean Sciences cruises, note that the transmissometer wavelength is 650 nm unless otherwise stated. NOTE: While the Fluorescence:CTD 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. For details on the processing see the report: 2019-008-proc.pdf. $REMARKS Quality flags have the following significance: ---------------------------------------------------------------------------------- 0 = Acceptable measurement with no header comment. 1 = Sample for this measurement was collected but not analyzed. Sample lost. 2 = Acceptable measurement with header comment. 3 = Questionable measurement (probably good). 4 = Poor measurement (probably bad). 5 = Measurement not reported (bad). 6 = Mean of replicate measurements. 7 = Manual chromatographic peak measurement. 8 = Irregular digital chromatographic peak integration. 9 = Sample was planned for this measurement from this bottle but was not collected. ----------------------------------------------------------------------------------- $END !-1-- 2- 3- --4--- ---5---- ---6---- ---7---- --8-- --9-- --10-- --11- ---12-- --13-- !Samp Bo Bo Pressu Temperat Salinity Sigma-t: Trans Trans Oxygen Oxyge Fluores PAR: !le_ tt tt re:CTD ure:CTD :CTD CTD missi missi :Disso n:Dis cence: CTD !Numb ~u ~u vity: vity: lved: solve CTD: !er mb en CTD: CTD: CTD: d:CTD Seapoin ! er ce 650 530 Volume :Mass t !---- -- -- ------ -------- -------- -------- ----- ----- ------ ----- ------- ------ *END OF HEADER 132 24 24 200.2 7.2813 33.9181 26.5535 56.7 86.4 2.73 118.5 0.111 0.0 131 23 23 200.7 7.2820 33.9179 26.5532 56.7 86.4 2.72 118.5 0.111 0.0 130 22 22 200.2 7.2819 33.9178 26.5532 56.7 86.4 2.73 118.9 0.113 0.0 129 21 21 200.4 7.2831 33.9177 26.5529 56.7 86.5 2.72 118.4 0.111 0.0 128 20 20 200.1 7.2839 33.9175 26.5527 56.7 86.4 2.72 118.4 0.112 0.0 127 19 19 200.8 7.2831 33.9182 26.5533 56.7 86.4 2.72 118.4 0.110 0.0 126 18 18 300.3 6.0852 33.9616 26.7472 57.0 86.9 1.79 78.0 0.110 0.0 125 17 17 300.5 6.0845 33.9616 26.7473 57.0 86.9 1.79 78.0 0.110 0.0 124 16 16 300.5 6.0855 33.9615 26.7471 57.0 86.9 1.79 78.0 0.110 0.0 123 15 15 300.5 6.0862 33.9615 26.7470 57.0 86.9 1.80 78.1 0.110 0.0 122 14 14 300.5 6.0864 33.9615 26.7470 56.9 86.9 1.80 78.1 0.110 0.0 121 13 13 300.4 6.0863 33.9614 26.7469 57.0 86.9 1.80 78.1 0.110 0.0 120 12 12 400.5 5.3215 34.0156 26.8833 57.2 87.4 1.17 50.8 0.107 0.0 119 11 11 400.4 5.3232 34.0156 26.8831 57.2 87.4 1.17 50.9 0.106 0.0 118 10 10 400.8 5.3234 34.0153 26.8828 57.2 87.4 1.17 50.9 0.107 0.0 117 9 9 400.5 5.3235 34.0156 26.8831 57.2 87.4 1.17 50.9 0.106 0.0 116 8 8 400.8 5.3207 34.0157 26.8835 57.2 87.4 1.17 50.8 0.107 0.0 115 7 7 400.6 5.3204 34.0155 26.8833 57.2 87.4 1.17 50.9 0.106 0.0 114 6 6 500.1 4.9482 34.0760 26.9744 57.3 87.7 0.79 34.2 0.102 0.0 113 5 5 500.2 4.9481 34.0760 26.9744 57.3 87.7 0.79 34.3 0.102 0.0 112 4 4 500.4 4.9485 34.0759 26.9743 57.3 87.7 0.79 34.2 0.101 0.0 111 3 3 500.1 4.9483 34.0759 26.9743 57.3 87.7 0.79 34.2 0.104 0.0 110 2 2 500.2 4.9482 34.0759 26.9743 57.4 87.7 0.79 34.2 0.102 0.0 109 1 1 500.1 4.9485 34.0759 26.9743 57.4 87.7 0.79 34.2 0.098 0.0