*2022/01/12 11:12:04.88 *IOS HEADER VERSION 2.0 2016/04/28 2016/06/13 IVF16 *FILE START TIME : UTC 2021/08/29 03:38:39.000 TIME INCREMENT : 0 0 0 0.416667E-01 0 ! (day hr min sec ms) NUMBER OF RECORDS : 2 DATA DESCRIPTION : Bottle:Rosette:Up:Stop + CTD:Up FILE TYPE : ASCII CRC : 56D9E917 NUMBER OF CHANNELS : 23 $TABLE: CHANNELS ! No Name Units Minimum Maximum !--- ----------------------------------- --------------- -------------- -------------- 1 Sample_Number n/a 202 202 2 Bottle_Number n/a 1 2 3 Bottle:Firing_Sequence n/a 1 2 4 Pressure:CTD dbar 4.5 2004.7 5 Temperature:CTD deg_C_(ITS90) 1.9569 15.7745 6 Salinity:CTD PSS-78 32.2947 34.5816 7 Sigma-t:CTD kg/m^3 23.7444 27.6656 8 Transmissivity:CTD:650 %/m 46.8 60.7 9 Transmissivity:CTD:530 %/m 70.2 95.8 10 Oxygen:Dissolved:CTD:Volume ml/l 1.25 5.92 11 Oxygen:Dissolved:CTD:Mass µmol/kg 54.5 258.3 12 Fluorescence:CTD:Seapoint mg/m^3 0.79E-01 1.43 13 Salinity:Bottle PSS-78 32.301 32.301 14 Flag:Salinity:Bottle n/a 15 Nitrate_plus_Nitrite:Bottle µmol/l 6.04 6.04 16 Flag:Nitrate_plus_Nitrite:Bottle n/a 17 Phosphate:Bottle µmol/l 0.77 0.77 18 Flag:Phosphate:Bottle n/a 19 Silicate:Bottle µmol/l 5.89 5.89 20 Flag:Silicate:Bottle n/a 21 Chlorophyll:Extracted:Bottle mg/m^3 0.39 0.39 22 Flag:Chlorophyll:Extracted:Bottle n/a 23 Phaeo-Pigment:Extracted:Bottle mg/m^3 0.1 0.1 $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 ' ' 9 F R4 4 14 -99 ' ' 3 NQ C ' ' 15 -99 ' ' 7 F R4 2 16 -99 ' ' 3 NQ C ' ' 17 -99 ' ' 8 F R4 3 18 -99 ' ' 3 NQ C ' ' 19 -99 ' ' 7 F R4 2 20 -99 ' ' 3 NQ C ' ' 21 -99 ' ' 7 F R4 2 22 -99 ' ' 3 NQ C ' ' 23 -99 ' ' 7 F R4 2 $END *ADMINISTRATION MISSION : 2021-008 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 : P15 EVENT NUMBER : 44 LATITUDE : 49 11.99000 N ! (deg min) LONGITUDE : 133 39.73000 W ! (deg min) WATER DEPTH : 3398 *INSTRUMENT TYPE : Sea-Bird CTD MODEL : SBE-911plus SERIAL NUMBER : 0443 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 68 - 75 days after collection. For details on duplicate analysis see file 2021-008_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 2021-008_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 2021-008_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 1 to 5 weeks after the cruise. Variability is assessed as the CV% (std dev / mean*100). Flags and comments apply to chlorophyll values only. Chlorophyll values ranged from 0.05-20.68 µg/l in 103 samples. Average %CV for this cruise was 5.86% (after one duplicate was rejected, original 8.25%) with 5 out of 23 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 acceptable. For details on duplicates see file 2021-008_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 2021-008_DMS_report.pdf and for duplicate analysis see 2021-008_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 2021-008_DMS_report.pdf and for duplicate analysis see 2021-008_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. Both salinity channels were found to be reading much lower relative to bottle samples than in three previous cruises using the same equipment, and a little lower than during the cruise that followed. Channel Salinity:CTD was found to be lower than bottles by an average of 0.0055 psu in deep water. Since delayed analysis and small errors due to incomplete flushing both would have led to bottle values being too high, no recalibration was applied to Salinity:CTD. While confidence in the bottle comparison is lower than usual, it is likely that channel Salinity:CTD is within ±0.003 psu. 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. The dissolved oxygen sensor was mounted on the primary pump and all primary channels produced bad data for cast 0037. The system returned to reasonable values by the end of the cast, but there was some evidence of drift in primary temperature and salinity thereafter (not used here). The dissolved oxgyen data looked ok in the comparison with bottles except for cast 0037. Dissolved oxygen was removed from file 2021-008-0037.che. 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: 2021-008-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 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 202 1 2 4.5 15.7745 32.2947 23.7444 46.8 70.2 5.92 258.3 1.430 32.3010 0 6.04 0 0.770 0 5.89 0 0.39 6 0.10 -99 2 1 2004.7 1.9569 34.5816 27.6656 60.7 95.8 1.25 54.5 0.079 -99.0000 0 -99.00 0 -99.000 0 -99.00 0 -99.00 0 -99.00