*2021/04/22 15:09:29.12 *IOS HEADER VERSION 2.0 2016/04/28 2016/06/13 IVF16 *FILE START TIME : UTC 2020/02/20 18:13:14.000 TIME INCREMENT : 0 0 0 0.416667E-01 0 ! (day hr min sec ms) NUMBER OF RECORDS : 12 DATA DESCRIPTION : Bottle:Rosette:Up:Stop + CTD:Up FILE TYPE : ASCII CRC : BBAC85CF NUMBER OF CHANNELS : 19 $TABLE: CHANNELS ! No Name Units Minimum Maximum !--- ---------------------------------- --------------- -------------- -------------- 1 Sample_Number n/a 775 786 2 Bottle_Number n/a 1 12 3 Bottle:Firing_Sequence n/a 1 12 4 Pressure:CTD dbar 3.1 193.8 5 Temperature:CTD deg_C_(ITS90) 6.6829 6.9819 6 Salinity:CTD PSS-78 31.589 31.9198 7 Sigma-t:CTD kg/m^3 24.7997 25.0214 8 Transmissivity:CTD:650 %/m 37.7 51.1 9 Transmissivity:CTD:530 %/m 58.3 82.9 10 Oxygen:Dissolved:CTD:Volume ml/l 6.19 6.83 11 Oxygen:Dissolved:CTD:Mass µmol/kg 269.8 297.6 12 Fluorescence:CTD:Seapoint mg/m^3 0.225 0.496 13 PAR:CTD µE/m^2/sec 0 186.9 14 Nitrate_plus_Nitrite:Bottle µmol/l 15.6 17.5 15 Flag:Nitrate_plus_Nitrite:Bottle n/a 16 Phosphate:Bottle µmol/l 1.349 1.512 17 Flag:Phosphate:Bottle n/a 18 Silicate:Bottle µmol/l 25.46 30.7 19 Flag:Silicate:Bottle n/a $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 14 -99 ' ' 6 F R4 1 15 0 ' ' 3 NQ C ' ' 16 -99 ' ' 8 F R4 3 17 0 ' ' 3 NQ C ' ' 18 -99 ' ' 7 F R4 2 19 0 ' ' 3 NQ C ' ' $END *ADMINISTRATION MISSION : 2020-001 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 : CH15 EVENT NUMBER : 102 LATITUDE : 54 18.42000 N ! (deg min) LONGITUDE : 130 42.44000 W ! (deg min) WATER DEPTH : 195 *INSTRUMENT TYPE : Sea-Bird CTD MODEL : SBE-911plus SERIAL NUMBER : 443 LOCATION : Mid-ship ! custom item *COMMENTS Sample Number 778: PHOS:Bottle - analysis error resulted in poor duplicate values, only one value available. 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 17 - 32 days after collection. For details on duplicate analysis see file 2020-001_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 2020-001_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 2020-001_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 ~1 to 7 weeks after the cruise, during the COVID-19 pandemic restriction. 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 0.02-1.11 µg/l in 171 samples. Average %CV for this cruise was 2.24% with 0 out of 52 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 2020-001_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. Many samples were run but had bad calibration and data were not logical. Many other samples were planned to be collected but were not due to the instrument problems. 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 2020-001_DMS_report.pdf and for duplicate analysis see 2020-001_DMS.pdf. DMSP-D: Approximately 50-75 ml of seawater were allowed to flow directly from the Niskin into a 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. 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%. There were some detectable concentrations for DMSP-D & DMSP-T at 200m for this cruise. It is uncertain as to the validity of these "hits" because there are not enough historical data to support them, nor are there DMS data for this cruise due to instrument problems. For more details see file 2020-001_DMS_report.pdf and for duplicate analysis see 2020-001_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: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 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: 2020-001-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-- --14- 15 ---16-- 17 --18-- 19 !Samp Bo Bo Pressu Temperat Salinity Sigma-t: Trans Trans Oxygen Oxyge Fluores PAR: Nitra Fl Phospha Fl Silica Fl !le_ tt tt re:CTD ure:CTD :CTD CTD missi missi :Disso n:Dis cence: CTD te_pl ag te: ag te: ag !Numb ~u ~u vity: vity: lved: solve CTD: ~Nitr ~o Bottle ~o Bottle ~o !er mb en CTD: CTD: CTD: d:CTD Seapoin ite:B tt tt tt ! er ce 650 530 Volume :Mass t ottle le le le !---- -- -- ------ -------- -------- -------- ----- ----- ------ ----- ------- ------ ----- -- ------- -- ------ -- *END OF HEADER 786 12 12 3.1 6.6832 31.5894 24.7999 50.3 81.3 6.83 297.5 0.392 168.7 15.8 0 1.383 0 26.36 0 785 11 11 5.3 6.6829 31.5890 24.7997 50.3 81.3 6.83 297.6 0.437 186.9 15.9 0 1.385 0 26.46 0 784 10 10 10.0 6.6959 31.5934 24.8015 50.5 81.6 6.83 297.4 0.496 59.0 15.9 0 1.365 0 26.48 0 783 9 9 20.4 6.7095 31.5984 24.8037 50.6 81.9 6.82 297.0 0.484 10.5 15.9 0 1.369 0 26.30 0 782 8 8 30.4 6.8143 31.6418 24.8244 51.1 82.9 6.78 295.3 0.447 3.6 15.8 0 1.355 0 25.96 0 781 7 7 50.5 6.8385 31.6771 24.8491 50.9 82.8 6.77 294.7 0.428 0.4 15.7 0 1.376 0 25.69 0 780 6 6 74.9 6.8304 31.6950 24.8642 50.4 81.8 6.75 294.3 0.446 0.0 15.6 0 1.349 0 25.58 0 779 5 5 100.0 6.8758 31.7397 24.8935 50.1 81.2 6.71 292.3 0.375 0.0 15.7 0 1.378 0 25.96 0 778 4 4 124.8 6.9182 31.7603 24.9042 50.7 82.3 6.69 291.5 0.341 0.0 15.7 6 1.363 2 25.46 6 777 3 3 150.4 6.9252 31.7966 24.9319 47.4 76.0 6.58 286.4 0.277 0.0 16.1 0 1.405 0 26.82 0 776 2 2 175.3 6.9334 31.8645 24.9842 37.9 58.6 6.36 277.1 0.246 0.0 17.0 0 1.495 0 29.65 0 775 1 1 193.8 6.9819 31.9198 25.0214 37.7 58.3 6.19 269.8 0.225 0.0 17.5 0 1.512 0 30.70 0