*2021/09/15 08:48:03.21 *IOS HEADER VERSION 2.0 2016/04/28 2016/06/13 IVF16 *FILE START TIME : UTC 2021/05/04 18:43:41.000 TIME INCREMENT : 0 0 0 0.416667E-01 0 ! (day hr min sec ms) NUMBER OF RECORDS : 19 DATA DESCRIPTION : Bottle:Rosette:Up:Stop + CTD:Up FILE TYPE : ASCII CRC : 6F698ADE NUMBER OF CHANNELS : 24 $TABLE: CHANNELS ! No Name Units Minimum Maximum !--- ---------------------------------- --------------- -------------- -------------- 1 Sample_Number n/a 56 74 2 Bottle_Number n/a 1 19 3 Bottle:Firing_Sequence n/a 1 19 4 Pressure:CTD dbar 5.5 1322.3 5 Temperature:CTD deg_C_(ITS90) 2.961 10.271 6 Salinity:CTD PSS-78 31.8573 34.474 7 Sigma-t:CTD kg/m^3 24.481 27.4945 8 Transmissivity:CTD:650 %/m 43.4 60.5 9 Transmissivity:CTD:530 %/m 58.1 93.1 10 Oxygen:Dissolved:CTD:Volume ml/l 0.23 7.33 11 Oxygen:Dissolved:CTD:Mass µmol/kg 10 319.5 12 Fluorescence:CTD:Seapoint mg/m^3 0.74E-01 1.113 13 PAR:CTD µE/m^2/sec 0 548.1 14 Salinity:Bottle PSS-78 34.2756 34.4582 15 Flag:Salinity:Bottle n/a 16 Oxygen:Dissolved:Bottle:Volume ml/l 0.241 7.29 17 Oxygen:Dissolved:Bottle:Mass µmol/kg 10.5 317.8 18 Flag:Oxygen:Dissolved:Bottle n/a 19 Nitrate_plus_Nitrite:Bottle µmol/l 0 44.44 20 Flag:Nitrate_plus_Nitrite:Bottle n/a 21 Phosphate:Bottle µmol/l 0.433 3.361 22 Flag:Phosphate:Bottle n/a 23 Silicate:Bottle µmol/l 3.22 150.87 24 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 ' ' ' ' F9.4 R4 ' ' 15 0 ' ' 3 NQ C ' ' 16 -99 ' ' ' ' F8.3 R4 ' ' 17 -99 ' ' 6 F ' ' 1 18 0 ' ' 3 NQ C ' ' 19 -99 ' ' 7 F R4 2 20 0 ' ' 3 NQ C ' ' 21 -99 ' ' 8 F R4 3 22 0 ' ' 3 NQ C ' ' 23 -99 ' ' 7 F R4 2 24 0 ' ' 3 NQ C ' ' $END *ADMINISTRATION MISSION : 2021-006 AGENCY : IOS, Ocean Science 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 : 20 LATITUDE : 48 38.98000 N ! (deg min) LONGITUDE : 126 39.97000 W ! (deg min) WATER DEPTH : 1320 *INSTRUMENT TYPE : Sea-Bird CTD MODEL : SBE-911plus SERIAL NUMBER : 0443 LOCATION : Mid-ship ! custom item *COMMENTS Sample Number 57: OXY:Bottle - sample over-titrated. Sample Number 60: NUTS:Bottle - sample intended as duplicate, however, only one sample processed, one tube found empty. 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 41 - 84 days after collection. For details on duplicate analysis see file 2021-006_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 2021-006_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 2021-006_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 5 to 7 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. Chlorophyll values ranged from 0.05-34.95 ug/l in 192 samples. Average %CV for this cruise was 2.98% with 1 out of 47 duplicate pairs having a CV > 10% and 0 duplicate pairs having a CV > 30% . Our average dataset %CV is 3.83% for 2013 - 2020 so the overall quality of this dataset is good. For details on duplicates see file 2021-006_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 2021-006_DMS_report.pdf and for duplicate analysis see 2021-006_DMS.pdf. DMSP-D: Approximately 50-100 ml of seawater were drained 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 containing 50 µl of a 50% sulphuric acid solution. A new funnel and filter were used for each sample. DMSP-T: 3.5 ml of seawater were collected directly from the Niskin into a polypropylene tube (15ml) 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 at the Institute of Ocean Sciences when time permitted. 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 2021-006_DMS_report.pdf and for duplicate analysis see 2021-006_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. 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. For details on the processing see the report: 2021-006-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 ---21-- 22 --23-- 24 !Samp Bo Bo Pressu Temperat Salinity Sigma-t: Trans Trans Oxygen Oxyge Fluores PAR: Salinity Fl Oxygen: Oxyge Fl Nitrat Fl Phospha Fl Silica Fl !le_ tt tt re:CTD ure:CTD :CTD CTD missi missi :Disso n:Dis cence: CTD :Bottle ag Dissolv n:Dis ag e_plus ag te: ag te: ag !Numb ~u ~u vity: vity: lved: solve CTD: ~o ed: ~ed:B ~o _Nitri ~o Bottle ~o Bottle ~o !er mb en CTD: CTD: CTD: d:CTD Seapoin tt Bottle: ottle tt te: tt tt tt ! er ce 650 530 Volume :Mass t le Volume :Mass le Bottle le le le !---- -- -- ------ -------- -------- -------- ----- ----- ------ ----- ------- ------ -------- -- ------- ----- -- ------ -- ------- -- ------ -- *END OF HEADER 74 19 19 5.5 10.2710 31.8585 24.4810 44.1 59.2 7.31 318.8 0.734 548.1 -99.0000 0 7.251 316.1 0 0.00 0 0.433 0 6.06 0 73 18 18 9.7 10.1946 31.8573 24.4928 43.4 58.1 7.33 319.5 1.004 162.6 -99.0000 0 7.290 317.8 0 0.00 0 0.485 0 6.06 0 72 17 17 25.4 9.0117 31.9060 24.7204 51.1 73.9 7.24 315.7 1.113 28.9 -99.0000 0 7.269 316.8 0 0.96 0 0.570 0 3.22 0 71 16 16 50.5 8.2769 31.9532 24.8677 57.7 87.1 6.77 295.0 0.246 3.8 -99.0000 0 6.739 293.7 6 5.68 6 0.894 6 8.30 6 70 15 15 75.2 8.0652 32.3176 25.1843 58.4 89.3 6.09 265.1 0.180 0.8 -99.0000 0 6.060 264.0 0 11.17 0 1.149 0 12.12 0 69 14 14 100.9 8.0260 32.9928 25.7198 58.6 89.5 4.49 195.5 0.149 0.2 -99.0000 0 4.513 196.5 0 19.84 0 1.667 0 22.81 0 68 13 13 124.9 7.9232 33.5404 26.1648 58.6 89.6 3.30 143.4 0.112 0.0 -99.0000 0 3.305 143.8 0 26.62 0 2.028 0 33.00 0 67 12 12 150.6 7.7676 33.7867 26.3809 58.6 89.5 2.66 115.8 0.102 0.0 -99.0000 0 2.640 114.9 0 29.54 0 2.209 0 39.36 0 66 11 11 175.4 7.5921 33.8692 26.4710 58.8 89.8 2.43 105.9 0.099 0.0 -99.0000 0 2.425 105.5 6 30.26 0 2.299 0 42.16 0 65 10 10 200.6 7.3327 33.9121 26.5416 59.1 90.6 2.44 106.2 0.095 0.0 -99.0000 0 2.440 106.2 0 31.30 0 2.305 0 43.95 0 64 9 9 250.5 6.5819 33.9392 26.6653 57.8 88.0 2.02 87.7 0.096 0.0 -99.0000 0 2.012 87.5 0 34.09 0 2.535 0 53.85 0 63 8 8 300.6 6.2015 33.9659 26.7358 58.2 88.8 1.76 76.6 0.086 0.0 -99.0000 0 1.778 77.3 0 35.75 0 2.649 0 59.39 0 62 7 7 401.0 5.4592 34.0373 26.8841 60.0 92.2 1.09 47.3 0.082 0.0 -99.0000 0 1.075 46.8 0 39.68 0 2.956 0 75.84 0 61 6 6 600.2 4.6956 34.1682 27.0759 60.5 93.1 0.42 18.1 0.078 0.0 -99.0000 0 0.431 18.7 6 42.67 0 3.215 0 96.97 0 60 5 5 800.2 4.1839 34.2736 27.2149 59.7 91.6 0.25 10.7 0.075 0.0 34.2756 0 0.263 11.4 0 43.45 2 3.315 2 113.68 2 59 4 4 999.8 3.5931 34.3799 27.3597 60.5 92.9 0.23 10.0 0.074 0.0 34.3851 6 0.241 10.5 0 44.09 0 3.361 0 131.51 0 58 3 3 1250.4 3.0899 34.4574 27.4694 59.7 91.8 0.41 17.6 0.075 0.0 34.4580 0 0.410 17.8 0 44.44 0 3.332 0 146.64 0 57 2 2 1250.4 3.0896 34.4574 27.4695 59.8 91.8 0.40 17.6 0.076 0.0 34.4582 0 0.425 18.5 2 44.12 0 3.329 0 146.64 0 56 1 1 1322.3 2.9610 34.4740 27.4945 59.2 90.8 0.46 20.0 0.078 0.0 -99.0000 0 0.482 21.0 0 44.11 0 3.304 0 150.87 0