*2021/09/15 08:48:05.43 *IOS HEADER VERSION 2.0 2016/04/28 2016/06/13 IVF16 *FILE START TIME : UTC 2021/05/10 18:23:52.000 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 : B76AB32E NUMBER OF CHANNELS : 23 $TABLE: CHANNELS ! No Name Units Minimum Maximum !--- ---------------------------------- --------------- -------------- -------------- 1 Sample_Number n/a 418 441 2 Bottle_Number n/a 1 24 3 Bottle:Firing_Sequence n/a 1 24 4 Pressure:CTD dbar 5.3 4317.2 5 Temperature:CTD deg_C_(ITS90) 1.5025 7.3722 6 Salinity:CTD PSS-78 32.459 34.6812 7 Sigma-t:CTD kg/m^3 25.3938 27.7787 8 Transmissivity:CTD:650 %/m 57.1 61 9 Transmissivity:CTD:530 %/m 86.9 94.8 10 Oxygen:Dissolved:CTD:Volume ml/l 0.41 7.2 11 Oxygen:Dissolved:CTD:Mass µmol/kg 18 313.4 12 Fluorescence:CTD:Seapoint mg/m^3 0.67E-01 0.664 13 Salinity:Bottle PSS-78 34.3631 34.6838 14 Flag:Salinity:Bottle n/a 15 Oxygen:Dissolved:Bottle:Volume ml/l 0.417 7.209 16 Oxygen:Dissolved:Bottle:Mass µmol/kg 18.1 314 17 Flag:Oxygen:Dissolved:Bottle n/a 18 Nitrate_plus_Nitrite:Bottle µmol/l 13.5 45.4 19 Flag:Nitrate_plus_Nitrite:Bottle n/a 20 Phosphate:Bottle µmol/l 1.238 3.162 21 Flag:Phosphate:Bottle n/a 22 Silicate:Bottle µmol/l 19.54 178.11 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 ' ' ' ' F8.3 R4 ' ' 16 -99 ' ' 6 F ' ' 1 17 0 ' ' 3 NQ C ' ' 18 -99 ' ' 7 F R4 2 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 : 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 : P26 EVENT NUMBER : 77 LATITUDE : 50 0.00000 N ! (deg min) LONGITUDE : 144 59.94000 W ! (deg min) WATER DEPTH : 4250 *INSTRUMENT TYPE : Sea-Bird CTD MODEL : SBE-911plus SERIAL NUMBER : 0443 LOCATION : Mid-ship ! custom item *COMMENTS Sample Number 435: NUTS:Bottle - sample intended as duplicate, however, only one sample processed. 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 !Samp Bo Bo Pressu Temperat Salinity Sigma-t: Trans Trans Oxygen Oxyge Fluores 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: :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 441 24 24 5.3 7.3641 32.4598 25.3948 57.4 87.5 7.00 304.9 0.190 -99.0000 0 7.019 305.7 6 13.57 0 1.240 0 19.64 0 440 23 23 9.8 7.3722 32.4599 25.3938 57.4 87.4 7.00 304.8 0.189 -99.0000 0 7.019 305.7 0 13.65 0 1.259 0 19.63 0 439 22 22 25.4 7.3085 32.4590 25.4018 57.1 86.9 7.00 305.0 0.275 -99.0000 0 7.015 305.6 0 13.50 0 1.238 0 19.54 0 438 21 21 50.7 5.9851 32.5033 25.6078 57.4 86.9 7.20 313.4 0.511 -99.0000 0 7.209 314.0 0 14.53 0 1.288 0 20.86 0 437 20 20 75.8 5.5841 32.5356 25.6812 57.9 88.1 7.11 309.8 0.664 -99.0000 0 7.123 310.2 0 15.69 0 1.349 0 22.78 0 436 19 19 99.7 5.3900 32.5686 25.7298 58.8 90.2 7.11 309.4 0.367 -99.0000 0 7.065 307.6 0 16.26 0 1.394 0 23.90 0 435 18 18 125.8 5.3178 33.0034 26.0823 59.6 91.9 5.71 248.4 0.163 -99.0000 0 5.882 256.0 0 21.86 2 1.686 2 31.76 2 434 17 17 150.9 5.1986 33.5335 26.5158 59.6 91.6 4.26 185.3 0.134 -99.0000 0 4.282 186.3 0 28.44 0 2.025 0 44.23 0 433 16 16 175.9 4.8632 33.6425 26.6402 59.7 91.9 3.66 159.3 0.113 -99.0000 0 3.682 160.2 6 31.13 0 2.208 0 51.67 0 432 15 15 200.1 4.5352 33.7043 26.7252 59.9 92.2 2.97 129.2 0.100 -99.0000 0 2.989 130.0 0 34.73 0 2.375 0 61.17 0 431 14 14 251.2 4.2427 33.7621 26.8022 60.3 92.9 2.34 101.6 0.086 -99.0000 0 2.347 102.1 0 37.88 0 2.665 0 70.55 0 430 13 13 300.8 4.1063 33.8372 26.8761 60.4 93.1 1.77 77.2 0.085 -99.0000 0 1.789 77.8 0 40.27 0 2.821 0 79.34 0 429 12 12 402.6 4.0990 33.9927 27.0005 60.6 93.5 1.21 52.4 0.076 -99.0000 0 1.218 53.0 0 42.33 0 2.926 0 94.93 0 428 11 11 600.8 3.7055 34.1658 27.1780 60.7 93.8 0.60 26.2 0.073 -99.0000 0 0.603 26.2 0 44.19 0 3.072 0 117.41 0 427 10 10 800.8 3.3485 34.2818 27.3051 60.8 93.9 0.47 20.3 0.071 -99.0000 0 0.469 20.4 6 44.83 0 3.126 0 132.30 0 426 9 9 1000.9 2.9899 34.3617 27.4022 60.8 93.9 0.41 18.0 0.073 34.3631 0 0.417 18.1 0 45.13 0 3.129 0 145.09 0 425 8 8 1251.1 2.6358 34.4360 27.4930 60.9 94.1 0.44 19.0 0.068 34.4388 0 0.429 18.6 0 45.40 0 3.162 0 157.14 0 424 7 7 1499.8 2.3689 34.4917 27.5602 60.9 94.1 0.54 23.6 0.067 34.4989 0 0.535 23.3 0 45.33 0 3.139 0 165.91 0 423 6 6 1999.6 1.9744 34.5753 27.6592 60.9 94.4 1.16 50.6 0.070 34.5764 0 1.152 50.1 0 43.65 0 3.018 0 174.58 0 422 5 5 2500.2 1.7587 34.6190 27.7109 60.9 94.5 1.80 78.1 0.071 34.6214 6 1.786 77.6 6 41.88 0 2.869 0 178.11 0 421 4 4 3000.4 1.5925 34.6509 27.7489 60.9 94.6 2.46 106.9 0.072 34.6572 0 2.454 106.6 0 40.01 0 2.732 0 174.44 0 420 3 3 3499.8 1.5109 34.6694 27.7698 61.0 94.8 2.92 127.0 0.073 34.6718 0 2.908 126.4 0 38.57 0 2.657 0 171.97 0 419 2 2 4000.2 1.5025 34.6781 27.7774 60.9 94.6 3.14 136.4 0.071 34.6838 6 3.137 136.3 0 37.98 6 2.617 6 172.14 6 418 1 1 4317.2 1.5191 34.6812 27.7787 60.0 93.0 3.20 139.1 0.073 -99.0000 0 3.191 138.7 0 37.70 0 2.603 0 174.09 0