*2021/03/03 09:39:55.90 *IOS HEADER VERSION 2.0 2016/04/28 2016/06/13 IVF16 *FILE START TIME : UTC 2020/08/20 21:50:06.000 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 : EFD1126E NUMBER OF CHANNELS : 23 $TABLE: CHANNELS ! No Name Units Minimum Maximum !--- ---------------------------------- --------------- -------------- -------------- 1 Sample_Number n/a 401 424 2 Bottle_Number n/a 1 24 3 Bottle:Firing_Sequence n/a 1 24 4 Pressure:CTD dbar 5.4 4317.9 5 Temperature:CTD deg_C_(ITS90) 1.5059 13.8893 6 Salinity:CTD PSS-78 32.256 34.6837 7 Sigma-t:CTD kg/m^3 24.1236 27.7805 8 Transmissivity:CTD:650 %/m 51.6 60.3 9 Transmissivity:CTD:530 %/m 79.4 96.5 10 Oxygen:Dissolved:CTD:Volume ml/l 0.42 6.98 11 Oxygen:Dissolved:CTD:Mass µmol/kg 18.2 304 12 Fluorescence:CTD:Seapoint mg/m^3 0.61E-01 1.543 13 Salinity:Bottle PSS-78 34.3619 34.6805 14 Flag:Salinity:Bottle n/a 15 Oxygen:Dissolved:Bottle:Volume ml/l 0.414 6.972 16 Oxygen:Dissolved:Bottle:Mass µmol/kg 18 303.7 17 Flag:Oxygen:Dissolved:Bottle n/a 18 Nitrate_plus_Nitrite:Bottle µmol/l 8.1 45.1 19 Flag:Nitrate_plus_Nitrite:Bottle n/a 20 Phosphate:Bottle µmol/l 0.837 3.024 21 Flag:Phosphate:Bottle n/a 22 Silicate:Bottle µmol/l 12.83 173.25 23 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 ' ' ' ' F9.4 R4 ' ' 14 0 ' ' 3 NQ C ' ' 15 -99 ' ' 8 F R4 3 16 -99 ' ' 6 F ' ' 1 17 0 ' ' 3 NQ C ' ' 18 -99 ' ' 6 F R4 1 19 0 ' ' 3 NQ C ' ' 20 -99 ' ' 8 F R4 3 21 0 ' ' 3 NQ C ' ' 22 -99 ' ' 7 F R4 2 23 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 : P26 EVENT NUMBER : 78 LATITUDE : 50 0.00000 N ! (deg min) LONGITUDE : 145 0.01000 W ! (deg min) WATER DEPTH : 4248 *INSTRUMENT TYPE : Sea-Bird CTD MODEL : SBE-911plus SERIAL NUMBER : 0443 LOCATION : Mid-ship ! custom item *COMMENTS Sample Number 401: PHOS:Botttle - Chauvenet outlier in duplicate study. Sample Number 403: OXY:Bottle - endpoint was late despite a nice curve. Sample over-titrated. Sample Number 413: OXY:Bottle - runaway titration caused a late endpoint. Sample over-titrated. Sample Number 421: OXY:Bottle - draw temperature may have been entered incorrectly. 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-- 23 !Samp Bo Bo Pressu Temperat Salinity Sigma-t: Trans Trans Oxygen Oxyge Fluores 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 cence: :Bottle ag Dissolv n:Dis ag te_pl ag te: ag te: ag !Numb ~u ~u vity: vity: lved: solve CTD: ~o ed: ~ed:B ~o ~Nitr ~o Bottle ~o Bottle ~o !er mb en CTD: CTD: CTD: d:CTD Seapoin tt Bottle: ottle tt ite:B tt tt tt ! er ce 650 530 Volume :Mass t le Volume :Mass le ottle le le le !---- -- -- ------ -------- -------- -------- ----- ----- ------ ----- ------- -------- -- ------- ----- -- ----- -- ------- -- ------ -- *END OF HEADER 424 24 24 5.4 13.8882 32.2657 24.1241 52.9 82.6 6.09 265.3 0.234 -99.0000 0 6.097 265.8 0 8.2 0 0.879 0 13.07 0 423 23 23 10.5 13.8893 32.2654 24.1236 53.3 83.1 6.08 265.0 0.276 -99.0000 0 6.098 265.9 0 8.2 0 0.837 0 13.05 0 422 22 22 25.4 13.6041 32.2560 24.1742 52.2 81.1 6.15 268.1 1.054 -99.0000 0 6.173 269.1 0 8.1 0 0.852 0 12.83 0 421 21 21 50.1 8.7554 32.4197 25.1617 51.6 79.4 6.98 304.0 1.543 -99.0000 0 6.972 303.7 26 9.9 0 0.977 0 13.04 0 420 20 20 75.5 6.1259 32.5159 25.6005 57.6 90.6 6.90 300.3 0.600 -99.0000 0 6.896 300.3 0 14.8 0 1.252 0 19.12 0 419 19 19 99.9 5.5113 32.5696 25.7166 59.0 93.8 6.89 299.7 0.281 -99.0000 0 6.845 298.1 0 16.8 0 1.316 0 22.96 0 418 18 18 124.9 5.5159 33.2082 26.2212 59.3 94.3 5.17 225.0 0.119 -99.0000 0 5.247 228.4 0 23.6 0 1.598 0 33.55 0 417 17 17 150.0 5.2228 33.5466 26.5234 59.3 94.1 4.25 184.8 0.102 -99.0000 0 4.286 186.5 0 28.1 0 1.850 0 43.13 0 416 16 16 175.1 4.9979 33.6615 26.6401 59.3 94.0 3.62 157.5 0.090 -99.0000 0 3.629 157.9 0 31.2 0 2.179 0 51.74 0 415 15 15 200.2 4.7399 33.7221 26.7170 59.4 94.2 3.12 135.5 0.086 -99.0000 0 3.124 135.9 0 33.7 0 2.342 0 58.62 0 414 14 14 250.3 4.3919 33.7747 26.7965 59.7 94.9 2.53 110.2 0.080 -99.0000 0 2.519 109.6 0 36.7 6 2.520 6 66.81 6 413 13 13 300.0 4.4078 33.8684 26.8692 59.7 94.9 1.84 79.8 0.079 -99.0000 0 1.818 79.1 2 39.6 0 2.715 0 75.73 0 412 12 12 400.8 4.1637 33.9852 26.9878 59.8 95.1 1.22 53.2 0.071 -99.0000 0 1.220 53.1 6 41.9 0 2.810 0 90.62 0 411 11 11 600.5 3.8053 34.1670 27.1690 60.1 95.6 0.68 29.7 0.064 -99.0000 0 0.678 29.5 0 43.5 0 2.739 0 113.13 0 410 10 10 800.7 3.3836 34.2785 27.2991 60.1 95.6 0.49 21.2 0.061 -99.0000 0 0.497 21.6 0 44.3 0 2.554 0 130.36 0 409 9 9 1000.6 3.0018 34.3613 27.4008 60.1 95.6 0.43 18.6 0.061 34.3619 0 0.423 18.4 0 44.8 0 3.016 0 143.19 0 408 8 8 1251.1 2.6515 34.4363 27.4919 60.1 95.6 0.42 18.2 0.061 34.4385 0 0.414 18.0 0 45.1 0 2.852 0 155.28 0 407 7 7 1500.0 2.3723 34.4929 27.5609 60.1 95.8 0.57 24.7 0.061 34.4957 0 0.560 24.3 0 45.0 0 3.024 0 163.48 0 406 6 6 2000.2 1.9732 34.5778 27.6613 60.2 96.1 1.17 50.6 0.061 34.5794 0 1.154 50.2 6 43.5 0 2.949 0 172.07 0 405 5 5 2501.1 1.7444 34.6236 27.7157 60.2 96.2 1.84 80.0 0.061 34.6223 0 1.831 79.6 0 41.6 0 2.850 0 173.25 0 404 4 4 3000.6 1.5989 34.6524 27.7497 60.2 96.3 2.43 105.7 0.061 34.6532 6 2.428 105.5 0 39.9 0 2.715 0 171.40 0 403 3 3 3499.8 1.5224 34.6702 27.7696 60.3 96.5 2.87 124.7 0.061 34.6712 0 2.876 125.0 2 38.6 0 2.629 0 169.02 0 402 2 2 4000.2 1.5059 34.6802 27.7788 60.1 96.3 3.11 135.2 0.061 34.6805 6 3.127 135.9 6 37.9 0 2.539 0 168.84 0 401 1 1 4317.9 1.5220 34.6837 27.7805 59.2 94.4 3.16 137.1 0.061 -99.0000 0 3.170 137.8 0 37.7 6 2.378 36 172.60 6