*2021/06/10 08:46:53.67 *IOS HEADER VERSION 2.0 2016/04/28 2016/06/13 IVF16 *FILE START TIME : UTC 2021/02/08 20:38:53.000 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 : A688ED3F NUMBER OF CHANNELS : 23 $TABLE: CHANNELS ! No Name Units Minimum Maximum !--- ----------------------------------- --------------- -------------- -------------- 1 Sample_Number n/a 365 388 2 Bottle_Number n/a 1 24 3 Bottle:Firing_Sequence n/a 1 24 4 Pressure:CTD dbar 5 4044.7 5 Temperature:CTD deg_C_(ITS90) 1.5064 7.1749 6 Salinity:CTD PSS-78 32.3919 34.6815 7 Sigma-t:CTD kg/m^3 25.3941 27.7798 8 Transmissivity:CTD:650 %/m 56.2 60.8 9 Transmissivity:CTD:530 %/m 85.8 94.7 10 Oxygen:Dissolved:CTD:Volume ml/l 0.37 6.86 11 Oxygen:Dissolved:CTD:Mass µmol/kg 15.9 298.8 12 Fluorescence:CTD:Seapoint mg/m^3 0.36E-01 0.816 13 Salinity:Bottle PSS-78 34.5822 34.6703 14 Flag:Salinity:Bottle n/a 15 Nitrate_plus_Nitrite:Bottle µmol/l 12.69 12.69 16 Flag:Nitrate_plus_Nitrite:Bottle n/a 17 Phosphate:Bottle µmol/l 1.209 1.209 18 Flag:Phosphate:Bottle n/a 19 Silicate:Bottle µmol/l 12.61 12.61 20 Flag:Silicate:Bottle n/a 21 Chlorophyll:Extracted:Bottle mg/m^3 0.37 0.37 22 Flag:Chlorophyll:Extracted:Bottle n/a 23 Phaeo-Pigment:Extracted:Bottle mg/m^3 0.18 0.18 $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 ' ' 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 ' ' 21 -99 ' ' 7 F R4 2 22 0 ' ' 3 NQ C ' ' 23 -99 ' ' 7 F R4 2 $END *ADMINISTRATION MISSION : 2021-001 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 : P24 EVENT NUMBER : 82 LATITUDE : 49 50.17000 N ! (deg min) LONGITUDE : 142 40.00000 W ! (deg min) WATER DEPTH : 3984 *INSTRUMENT TYPE : Sea-Bird CTD MODEL : SBE-911plus SERIAL NUMBER : 0550 LOCATION : Mid-ship ! custom item *COMMENTS 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 13 - 29 days after collection. For details on duplicate analysis see file 2021-001_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 2021-001_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. For precision and duplicate analysis see file 2021-001_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 3 to 6 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 0.01-0.82 ug/l in 135 samples. Average %CV for this cruise was 2.48% with 2 out of 29 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 2021-001_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 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 2021-001_DMS_report.pdf and for duplicate analysis see 2021-001_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%. The workstation for the DMS instrument suffered a hard drive failure after P12. No subsequent samples were collected for DMS or DMSP. For more details see file 2021-001_DMS_report.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. For details on the processing see the report: 2021-001-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 --21-- 22 --23-- !Samp Bo Bo Pressu Temperat Salinity Sigma-t: Trans Trans Oxygen Oxyge Fluores Salinity Fl Nitrat Fl Phospha Fl Silica Fl Chloro Fl Phaeo- !le_ tt tt re:CTD ure:CTD :CTD CTD missi missi :Disso n:Dis cence: :Bottle ag e_plus ag te: ag te: ag phyll: ag Pigmen !Numb ~u ~u vity: vity: lved: solve CTD: ~o _Nitri ~o Bottle ~o Bottle ~o Extrac ~o t:Extr !er mb en CTD: CTD: CTD: d:CTD Seapoin tt te: tt tt tt ted: tt acted: ! er ce 650 530 Volume :Mass t le Bottle le le le Bottle le Bottle !---- -- -- ------ -------- -------- -------- ----- ----- ------ ----- ------- -------- -- ------ -- ------- -- ------ -- ------ -- ------ *END OF HEADER 388 24 24 5.0 6.9762 32.3929 25.3946 56.2 85.8 6.85 298.5 0.533 -99.0000 0 12.69 0 1.209 0 12.61 0 0.37 0 0.18 387 23 23 10.4 6.9759 32.3928 25.3945 56.3 86.2 6.86 298.7 0.685 -99.0000 0 -99.00 0 -99.000 0 -99.00 0 -99.00 0 -99.00 386 22 22 24.7 6.9736 32.3919 25.3941 56.3 86.1 6.86 298.8 0.816 -99.0000 0 -99.00 0 -99.000 0 -99.00 0 -99.00 0 -99.00 385 21 21 50.3 6.9741 32.3919 25.3941 56.5 86.4 6.84 298.0 0.801 -99.0000 0 -99.00 0 -99.000 0 -99.00 0 -99.00 0 -99.00 384 20 20 74.8 6.9777 32.3925 25.3941 56.5 86.4 6.84 297.9 0.800 -99.0000 0 -99.00 0 -99.000 0 -99.00 0 -99.00 0 -99.00 383 19 19 99.9 7.1749 32.4632 25.4233 58.4 89.9 6.64 289.2 0.390 -99.0000 0 -99.00 0 -99.000 0 -99.00 0 -99.00 0 -99.00 382 18 18 124.8 6.2930 33.0400 25.9932 59.7 92.3 5.26 228.8 0.105 -99.0000 0 -99.00 0 -99.000 0 -99.00 0 -99.00 0 -99.00 381 17 17 148.9 6.0642 33.4927 26.3795 59.9 92.7 4.39 191.2 0.057 -99.0000 0 -99.00 0 -99.000 0 -99.00 0 -99.00 0 -99.00 380 16 16 174.8 5.8528 33.6854 26.5580 59.9 92.7 3.70 160.9 0.050 -99.0000 0 -99.00 0 -99.000 0 -99.00 0 -99.00 0 -99.00 379 15 15 201.2 5.5699 33.7314 26.6288 60.0 92.7 3.36 146.2 0.047 -99.0000 0 -99.00 0 -99.000 0 -99.00 0 -99.00 0 -99.00 378 14 14 249.8 5.1287 33.7791 26.7184 60.0 92.5 2.82 122.7 0.046 -99.0000 0 -99.00 0 -99.000 0 -99.00 0 -99.00 0 -99.00 377 13 13 300.3 4.8054 33.8213 26.7885 60.0 92.6 2.32 101.1 0.045 -99.0000 0 -99.00 0 -99.000 0 -99.00 0 -99.00 0 -99.00 376 12 12 400.1 4.3502 33.9028 26.9027 60.5 93.5 1.56 67.8 0.044 -99.0000 0 -99.00 0 -99.000 0 -99.00 0 -99.00 0 -99.00 375 11 11 600.9 4.1099 34.1382 27.1150 60.7 93.9 0.55 24.0 0.043 -99.0000 0 -99.00 0 -99.000 0 -99.00 0 -99.00 0 -99.00 374 10 10 799.3 3.5778 34.2515 27.2589 60.7 93.8 0.41 18.0 0.043 -99.0000 0 -99.00 0 -99.000 0 -99.00 0 -99.00 0 -99.00 373 9 9 1000.2 3.1157 34.3520 27.3829 60.7 93.9 0.37 15.9 0.043 -99.0000 0 -99.00 0 -99.000 0 -99.00 0 -99.00 0 -99.00 372 8 8 1250.4 2.7284 34.4253 27.4764 60.8 94.0 0.39 17.1 0.042 -99.0000 0 -99.00 0 -99.000 0 -99.00 0 -99.00 0 -99.00 371 7 7 1501.0 2.3930 34.4913 27.5579 60.8 94.1 0.53 22.9 0.041 -99.0000 0 -99.00 0 -99.000 0 -99.00 0 -99.00 0 -99.00 370 6 6 1749.8 2.1389 34.5431 27.6203 60.8 94.3 0.86 37.2 0.040 -99.0000 0 -99.00 0 -99.000 0 -99.00 0 -99.00 0 -99.00 369 5 5 1999.1 1.9548 34.5805 27.6649 60.8 94.4 1.24 53.7 0.039 34.5822 0 -99.00 0 -99.000 0 -99.00 0 -99.00 0 -99.00 368 4 4 2500.5 1.7302 34.6255 27.7183 60.8 94.6 1.89 82.2 0.037 34.6264 0 -99.00 0 -99.000 0 -99.00 0 -99.00 0 -99.00 367 3 3 2999.2 1.5878 34.6539 27.7517 60.8 94.7 2.47 107.5 0.037 34.6553 0 -99.00 0 -99.000 0 -99.00 0 -99.00 0 -99.00 366 2 2 3501.8 1.5280 34.6698 27.7689 60.8 94.7 2.85 123.6 0.036 34.6703 0 -99.00 0 -99.000 0 -99.00 0 -99.00 0 -99.00 365 1 1 4044.7 1.5064 34.6815 27.7798 59.7 92.6 3.10 134.8 0.036 -99.0000 0 -99.00 0 -99.000 0 -99.00 0 -99.00 0 -99.00