*2019/06/25 13:57:08.51 *IOS HEADER VERSION 2.0 2016/04/28 2016/06/13 IVF16 *FILE START TIME : UTC 2019/02/18 16:45:39.000 TIME INCREMENT : 0 0 0 0.416667E-01 0 ! (day hr min sec ms) NUMBER OF RECORDS : 6 DATA DESCRIPTION : Bottle:Rosette:Up:Stop + CTD:Up FILE TYPE : ASCII CRC : 178499CC NUMBER OF CHANNELS : 20 $TABLE: CHANNELS ! No Name Units Minimum Maximum !--- ---------------------------------- --------------- -------------- -------------- 1 Sample_Number n/a 686 691 2 Bottle_Number n/a 1 6 3 Bottle:Firing_Sequence n/a 1 6 4 Pressure:CTD dbar 2.6 45.6 5 Temperature:CTD deg_C_(ITS90) 6.6811 7.775 6 Salinity:CTD PSS-78 30.6986 31.7023 7 Sigma-t:CTD kg/m^3 24.0986 24.7426 8 Transmissivity:CTD %/m 31.2 44.3 9 Oxygen:Dissolved:CTD:Volume ml/l 6.23 6.48 10 Oxygen:Dissolved:CTD:Mass µmol/kg 271.5 282.6 11 Fluorescence:CTD:Seapoint mg/m^3 0.156 0.371 12 PAR:CTD µE/m^2/sec 0 101.5 13 Salinity:Bottle PSS-78 30.7324 30.7324 14 Flag:Salinity:Bottle n/a 15 Nitrate_plus_Nitrite:Bottle µmol/l 15.92 17.65 16 Flag:Nitrate_plus_Nitrite:Bottle n/a 17 Phosphate:Bottle µmol/l 1.476 1.542 18 Flag:Phosphate:Bottle n/a 19 Silicate:Bottle µmol/l 27.96 32.59 20 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 ' ' 7 F ' ' 2 10 -99 ' ' 6 F ' ' 1 11 -99 ' ' 8 F ' ' 3 12 -99 ' ' 7 F ' ' 1 13 -99 ' ' 9 F R4 4 14 0 ' ' 3 NQ C ' ' 15 -99 ' ' 7 F R4 2 16 0 ' ' 3 NQ C ' ' 17 -99 ' ' 8 F R4 3 18 0 ' ' 3 NQ C ' ' 19 -99 ' ' 7 F R4 2 20 0 ' ' 3 NQ C ' ' $END *ADMINISTRATION MISSION : 2019-001 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 : CH27 EVENT NUMBER : 108 LATITUDE : 54 6.56000 N ! (deg min) LONGITUDE : 130 16.45000 W ! (deg min) WATER DEPTH : 47 *INSTRUMENT TYPE : Sea-Bird CTD MODEL : SBE-911plus SERIAL NUMBER : 0506 LOCATION : Mid-ship ! custom item *COMMENTS Samples Number 686 to 691: NUTS:Bottle - collected in polypropylene bottles. 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 using two different Guildline 8400B Salinometers standardized with IAPSO standard seawater. The first 51 samples were analyzed using salinometers s/n 68572 within 19-34 days of collection and required recalculation due to non-linearity in that autosal. The remainder of the samples were analyzed using salinometer s/n #69086 within 29-47 days of collection. For details on duplicate analysis see file 2019-001_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 2019-001_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. Some samples were collected using polypropylene bottles instead of nutrient tubes due to a limit of supply for additional stations. Two stations were compared with both nutrient tubes and polyprolyene bottles. For precision and duplicate analysis, including a comparison between samples from polypropylene bottles and nutrient tubes, see file 2019-001_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 ~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 0.01-1.56 µg/l in 102 samples. Average %CV for this cruise was 4.17% with 3 out of 53 duplicate pairs having a CV > 10% and 0 out of 53 duplicate pairs having a CV > 30%. Our average dataset %CV is 3.80% for 2013 - 2018 so the overall quality of this dataset is very good. For details on duplicates see file 2019-001_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 Chromasorb 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. For more details see file 2019-001_DMS_report.pdf and for duplicate analysis see 2019-001_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. DMPS-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. For more details see file 2019-001_DMS_report.pdf and for duplicate analysis see 2019-001_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. 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. 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. For details on the processing see the report: 2019-001-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-- 20 !Samp Bo Bo Pressu Temperat Salinity Sigma-t: Trans Oxygen Oxyge Fluores PAR: Salinity Fl Nitrat Fl Phospha Fl Silica Fl !le_ tt tt re:CTD ure:CTD :CTD CTD missi :Disso n:Dis cence: CTD :Bottle ag e_plus ag te: ag te: ag !Numb ~u ~u vity: lved: solve CTD: ~o _Nitri ~o Bottle ~o Bottle ~o !er mb en CTD CTD: d:CTD Seapoin tt te: tt tt tt ! er ce Volume :Mass t le Bottle le le le !---- -- -- ------ -------- -------- -------- ----- ------ ----- ------- ------ -------- -- ------ -- ------- -- ------ -- *END OF HEADER 691 6 6 2.6 6.7567 30.7532 24.1321 41.7 6.47 282.1 0.371 101.5 30.7324 0 17.64 2 1.538 2 32.59 2 690 5 5 5.0 6.6811 30.6986 24.0986 41.7 6.48 282.6 0.367 42.6 -99.0000 0 17.65 2 1.542 2 32.36 2 689 4 4 10.4 7.0027 30.9286 24.2387 44.3 6.39 278.3 0.368 10.4 -99.0000 0 17.25 2 1.526 2 31.24 2 688 3 3 19.6 7.5890 31.4177 24.5449 43.9 6.29 274.3 0.203 1.4 -99.0000 0 16.43 2 1.508 2 28.63 2 687 2 2 30.3 7.7444 31.5881 24.6573 35.2 6.27 273.4 0.172 0.2 -99.0000 0 15.92 2 1.476 2 27.98 2 686 1 1 45.6 7.7750 31.7023 24.7426 31.2 6.23 271.5 0.156 0.0 -99.0000 0 16.04 2 1.478 2 27.96 2