*2021/03/03 09:39:55.05 *IOS HEADER VERSION 2.0 2016/04/28 2016/06/13 IVF16 *FILE START TIME : UTC 2020/08/17 04:01:15.000 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 : 2E5E1A15 NUMBER OF CHANNELS : 22 $TABLE: CHANNELS ! No Name Units Minimum Maximum !--- ---------------------------------- --------------- -------------- -------------- 1 Sample_Number n/a 206 229 2 Bottle_Number n/a 1 24 3 Bottle:Firing_Sequence n/a 1 24 4 Pressure:CTD dbar 5.6 3685.7 5 Temperature:CTD deg_C_(ITS90) 1.5663 15.4664 6 Salinity:CTD PSS-78 32.1859 34.6693 7 Sigma-t:CTD kg/m^3 23.7294 27.7656 8 Transmissivity:CTD:650 %/m 46.9 60.2 9 Transmissivity:CTD:530 %/m 70.8 96.2 10 Oxygen:Dissolved:CTD:Volume ml/l 0.29 6.46 11 Oxygen:Dissolved:CTD:Mass µmol/kg 12.7 281.6 12 Salinity:Bottle PSS-78 34.3567 34.6674 13 Flag:Salinity:Bottle n/a 14 Oxygen:Dissolved:Bottle:Volume ml/l 0.297 6.484 15 Oxygen:Dissolved:Bottle:Mass µmol/kg 12.9 282.5 16 Flag:Oxygen:Dissolved:Bottle n/a 17 Nitrate_plus_Nitrite:Bottle µmol/l 1.4 45.4 18 Flag:Nitrate_plus_Nitrite:Bottle n/a 19 Phosphate:Bottle µmol/l 0.424 3.157 20 Flag:Phosphate:Bottle n/a 21 Silicate:Bottle µmol/l 0.58 178.55 22 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 ' ' ' ' F9.4 R4 ' ' 13 0 ' ' 3 NQ C ' ' 14 -99 ' ' 8 F R4 3 15 -99 ' ' 6 F ' ' 1 16 0 ' ' 3 NQ C ' ' 17 -99 ' ' 6 F R4 1 18 0 ' ' 3 NQ C ' ' 19 -99 ' ' 8 F R4 3 20 0 ' ' 3 NQ C ' ' 21 -99 ' ' 7 F R4 2 22 0 ' ' 3 NQ C ' ' $END *ADMINISTRATION MISSION : 2020-008 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 : P16 EVENT NUMBER : 44 LATITUDE : 49 16.99000 N ! (deg min) LONGITUDE : 134 40.00000 W ! (deg min) WATER DEPTH : 3632 *INSTRUMENT TYPE : Sea-Bird CTD MODEL : SBE-911plus SERIAL NUMBER : 0443 LOCATION : Mid-ship ! custom item *COMMENTS Samples Number 206 to 229: OXY:Bottle - no water seal for 12 hours but stored outside in the cool. Sample Number 208: SAL:Bottle - screw cap was loose. Sample Number 214: OXY:Bottle - runaway titration causing a late endpoint. Sample over-titrated. 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 26 - 39 days after collection. For details on duplicate analysis see file 2020-008_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 2020-008_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 2020-008_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 ~5 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: Excluding degraded samples, chlorophyll values ranged from 0.04-34.88 µg/l in 119 samples. Average %CV for this cruise was 2.9% with 2 out of 24 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 good. For details on duplicates see file 2020-008_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 2020-008_DMS_report.pdf and for duplicate analysis see 2020-008_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%. NOTE: all DMSP data for this cruise were lost due to a freezer compressor failure at IOS. 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 CTD fluorometer used for casts 0001 to 0050 produced steadily higher dark values after cast 0015 and compared poorly with extracted chlorophyll so those data were removed. From cast 0052 onwards a different fluorometer was used and performed well. For details on the processing see the report: 2020-008-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 ---14-- --15- 16 --17- 18 ---19-- 20 --21-- 22 !Samp Bo Bo Pressu Temperat Salinity Sigma-t: Trans Trans Oxygen Oxyge Salinity Fl Oxygen: Oxyge Fl Nitra Fl Phospha Fl Silica Fl !le_ tt tt re:CTD ure:CTD :CTD CTD missi missi :Disso n:Dis :Bottle ag Dissolv n:Dis ag te_pl ag te: ag te: ag !Numb ~u ~u vity: vity: lved: solve ~o ed: ~ed:B ~o ~Nitr ~o Bottle ~o Bottle ~o !er mb en CTD: CTD: CTD: d:CTD tt Bottle: ottle tt ite:B tt tt tt ! er ce 650 530 Volume :Mass le Volume :Mass le ottle le le le !---- -- -- ------ -------- -------- -------- ----- ----- ------ ----- -------- -- ------- ----- -- ----- -- ------- -- ------ -- *END OF HEADER 229 24 24 5.6 15.4629 32.1859 23.7294 50.0 76.7 5.95 259.6 -99.0000 0 5.950 259.5 3 1.4 0 0.424 0 0.66 0 228 23 23 10.5 15.4664 32.1869 23.7294 49.8 76.4 5.95 259.6 -99.0000 0 5.974 260.6 3 1.4 0 0.431 0 0.64 0 227 22 22 25.4 15.4520 32.2206 23.7585 46.9 70.8 6.00 261.6 -99.0000 0 6.068 264.6 3 1.4 0 0.470 0 0.58 0 226 21 21 50.6 10.3898 32.3257 24.8251 53.5 83.6 6.46 281.6 -99.0000 0 6.484 282.5 3 5.7 0 0.842 0 4.77 0 225 20 20 75.5 8.2199 32.3850 25.2146 58.2 92.0 6.45 281.0 -99.0000 0 6.453 281.1 36 9.8 0 1.016 0 7.71 0 224 19 19 99.9 7.3843 32.5721 25.4804 59.2 94.2 6.16 268.2 -99.0000 0 6.056 263.7 3 13.9 0 1.234 0 14.48 0 223 18 18 125.8 6.5350 33.1414 26.0422 59.2 94.1 4.78 208.0 -99.0000 0 4.747 206.6 3 23.0 6 1.729 6 29.44 6 222 17 17 150.3 6.2026 33.5265 26.3887 59.1 93.8 4.01 174.2 -99.0000 0 3.970 172.7 3 27.7 0 1.973 0 39.44 0 221 16 16 175.1 5.8464 33.6826 26.5566 59.1 93.8 3.92 170.3 -99.0000 0 3.897 169.5 3 28.6 0 2.006 0 44.50 0 220 15 15 200.4 5.6128 33.7545 26.6419 59.0 93.6 3.56 155.0 -99.0000 0 3.557 154.7 3 30.4 0 2.117 0 50.35 0 219 14 14 249.7 5.1956 33.8068 26.7326 59.2 93.9 2.99 130.1 -99.0000 0 2.970 129.2 3 33.6 0 2.328 0 59.96 0 218 13 13 300.1 4.7865 33.8651 26.8253 59.5 94.6 2.25 97.6 -99.0000 0 2.228 96.9 36 37.3 0 2.587 0 71.55 0 217 12 12 401.0 4.4667 33.9644 26.9392 59.7 94.9 1.49 64.7 -99.0000 0 1.491 64.8 3 40.6 0 2.811 0 85.05 0 216 11 11 600.4 4.1479 34.1609 27.1291 59.9 95.4 0.44 19.0 -99.0000 0 0.429 18.7 3 44.1 0 3.092 0 106.39 0 215 10 10 800.5 3.5295 34.2637 27.2733 60.0 95.4 0.34 14.7 -99.0000 0 0.351 15.3 3 44.8 0 3.133 0 127.50 0 214 9 9 1001.0 3.1156 34.3506 27.3818 60.1 95.5 0.29 12.7 34.3567 0 0.297 12.9 3 45.4 0 3.157 0 141.82 0 213 8 8 1250.9 2.7413 34.4239 27.4741 60.1 95.5 0.32 13.9 34.4259 0 0.305 13.3 3 45.4 6 3.145 6 153.88 6 212 7 7 1501.0 2.3935 34.4980 27.5632 60.1 95.6 0.52 22.7 34.4995 6 0.509 22.1 36 45.3 0 3.114 0 164.37 0 211 6 6 2000.3 1.9618 34.5812 27.6649 60.1 95.9 1.23 53.5 34.5844 0 1.220 53.0 3 43.4 0 2.965 0 172.96 0 210 5 5 2500.2 1.7305 34.6280 27.7202 60.2 96.1 1.90 82.3 34.6302 0 1.893 82.3 3 41.5 0 2.831 0 175.16 0 209 4 4 3000.2 1.6009 34.6536 27.7505 60.1 96.2 2.41 104.6 34.6556 0 2.414 104.9 36 40.0 0 2.720 0 174.89 0 208 3 3 3499.8 1.5686 34.6658 27.7627 59.9 95.8 2.67 116.0 34.6674 3 2.681 116.5 3 39.2 0 2.667 0 175.89 0 207 2 2 3499.6 1.5686 34.6658 27.7627 59.9 95.4 2.67 116.2 34.6656 0 2.683 116.6 3 39.2 0 2.669 0 176.69 0 206 1 1 3685.7 1.5663 34.6693 27.7656 59.4 94.7 2.73 118.7 -99.0000 0 2.744 119.2 3 39.1 0 2.652 0 178.55 0