*2021/03/03 09:39:55.95 *IOS HEADER VERSION 2.0 2016/04/28 2016/06/13 IVF16 *FILE START TIME : UTC 2020/08/24 05:15:48.000 TIME INCREMENT : 0 0 0 0.416667E-01 0 ! (day hr min sec ms) NUMBER OF RECORDS : 19 DATA DESCRIPTION : Bottle:Rosette:Up:Stop + CTD:Up FILE TYPE : ASCII CRC : 21859E9B NUMBER OF CHANNELS : 26 $TABLE: CHANNELS ! No Name Units Minimum Maximum !--- ----------------------------------- --------------- -------------- -------------- 1 Sample_Number n/a 425 443 2 Bottle_Number n/a 1 19 3 Bottle:Firing_Sequence n/a 1 19 4 Pressure:CTD dbar 5.5 1316.9 5 Temperature:CTD deg_C_(ITS90) 2.8465 16.8449 6 Salinity:CTD PSS-78 31.9329 34.4799 7 Sigma-t:CTD kg/m^3 23.2243 27.5095 8 Transmissivity:CTD:650 %/m 40 59.9 9 Transmissivity:CTD:530 %/m 55.5 95.1 10 Oxygen:Dissolved:CTD:Volume ml/l 0.23 6.49 11 Oxygen:Dissolved:CTD:Mass µmol/kg 9.8 282.6 12 Fluorescence:CTD:Seapoint mg/m^3 0.61E-01 2.705 13 Salinity:Bottle PSS-78 31.938 34.4536 14 Flag:Salinity:Bottle n/a 15 Oxygen:Dissolved:Bottle:Volume ml/l 0.23 6.458 16 Oxygen:Dissolved:Bottle:Mass µmol/kg 10 281.4 17 Flag:Oxygen:Dissolved:Bottle n/a 18 Nitrate_plus_Nitrite:Bottle µmol/l 0 7.4 19 Flag:Nitrate_plus_Nitrite:Bottle n/a 20 Phosphate:Bottle µmol/l 0.241 0.952 21 Flag:Phosphate:Bottle n/a 22 Silicate:Bottle µmol/l 1.45 6.22 23 Flag:Silicate:Bottle n/a 24 Chlorophyll:Extracted:Bottle mg/m^3 0.35 1.27 25 Flag:Chlorophyll:Extracted:Bottle n/a 26 Phaeo-Pigment:Extracted:Bottle mg/m^3 0.9E-01 0.52 $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 ' ' 24 -99 ' ' 7 F R4 2 25 0 ' ' 3 NQ C ' ' 26 -99 ' ' 7 F R4 2 $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 : P4 EVENT NUMBER : 86 LATITUDE : 48 38.97000 N ! (deg min) LONGITUDE : 126 39.85000 W ! (deg min) WATER DEPTH : 1311 *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 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 --24-- 25 --26-- !Samp Bo Bo Pressu Temperat Salinity Sigma-t: Trans Trans Oxygen Oxyge Fluores Salinity Fl Oxygen: Oxyge Fl Nitra 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 Dissolv n:Dis ag te_pl ag te: ag te: ag phyll: ag Pigmen !Numb ~u ~u vity: vity: lved: solve CTD: ~o ed: ~ed:B ~o ~Nitr ~o Bottle ~o Bottle ~o Extrac ~o t:Extr !er mb en CTD: CTD: CTD: d:CTD Seapoin tt Bottle: ottle tt ite:B tt tt tt ted: tt acted: ! er ce 650 530 Volume :Mass t le Volume :Mass le ottle le le le Bottle le Bottle !---- -- -- ------ -------- -------- -------- ----- ----- ------ ----- ------- -------- -- ------- ----- -- ----- -- ------- -- ------ -- ------ -- ------ *END OF HEADER 443 19 19 5.5 16.8449 31.9338 23.2248 48.1 72.2 5.77 251.8 0.604 31.9380 0 5.764 251.6 0 0.0 0 0.241 0 1.48 0 0.36 0 0.09 442 18 18 10.8 16.8441 31.9329 23.2243 48.2 72.2 5.77 251.6 0.602 -99.0000 0 5.773 252.0 0 0.0 0 0.297 0 1.45 0 0.35 0 0.09 441 17 17 25.6 14.3798 32.0757 23.8760 40.0 55.5 6.33 276.2 2.705 -99.0000 0 6.379 278.2 6 0.4 0 0.431 0 2.15 0 1.27 6 0.52 440 16 16 50.1 8.6407 32.3405 25.1171 56.6 88.4 6.49 282.6 0.717 -99.0000 0 6.458 281.4 0 7.4 0 0.952 0 6.22 0 0.36 0 0.20 439 15 15 74.9 7.5956 32.4076 25.3217 58.9 93.3 6.48 282.1 0.195 -99.0000 0 6.446 280.8 0 -99.0 0 -99.000 0 -99.00 0 -99.00 0 -99.00 438 14 14 100.3 7.7456 33.0207 25.7822 56.9 88.6 3.33 145.1 0.099 -99.0000 0 3.691 160.7 0 -99.0 0 -99.000 0 -99.00 0 -99.00 0 -99.00 437 13 13 125.2 7.2947 33.4865 26.2120 58.0 91.5 3.43 149.3 0.086 -99.0000 0 3.457 150.4 0 -99.0 0 -99.000 0 -99.00 0 -99.00 0 -99.00 436 12 12 150.3 7.2927 33.7634 26.4302 58.8 93.1 3.47 150.8 0.085 -99.0000 0 3.402 148.0 0 -99.0 0 -99.000 0 -99.00 0 -99.00 0 -99.00 435 11 11 174.7 7.1137 33.8764 26.5439 58.5 92.4 2.85 123.9 0.077 -99.0000 0 2.854 124.2 0 -99.0 0 -99.000 0 -99.00 0 -99.00 0 -99.00 434 10 10 200.4 6.8926 33.9008 26.5934 58.5 92.5 2.71 117.8 0.074 -99.0000 0 2.713 118.0 0 -99.0 0 -99.000 0 -99.00 0 -99.00 0 -99.00 433 9 9 250.2 6.4280 33.9327 26.6803 59.4 94.2 2.35 102.1 0.072 -99.0000 0 2.331 101.4 6 -99.0 0 -99.000 0 -99.00 0 -99.00 0 -99.00 432 8 8 300.2 6.0560 33.9565 26.7469 59.7 94.5 1.89 82.4 0.067 -99.0000 0 1.889 82.2 0 -99.0 0 -99.000 0 -99.00 0 -99.00 0 -99.00 431 7 7 400.2 5.3377 34.0116 26.8782 59.7 94.7 1.19 51.9 0.061 -99.0000 0 1.192 51.8 0 -99.0 0 -99.000 0 -99.00 0 -99.00 0 -99.00 430 6 6 600.3 4.5478 34.1447 27.0735 59.9 95.1 0.46 20.0 0.061 -99.0000 0 0.478 20.8 0 -99.0 0 -99.000 0 -99.00 0 -99.00 0 -99.00 429 5 5 800.1 4.0973 34.2786 27.2280 58.8 93.0 0.24 10.3 0.061 34.2789 0 0.249 10.8 0 -99.0 0 -99.000 0 -99.00 0 -99.00 0 -99.00 428 4 4 1000.5 3.5571 34.3791 27.3626 59.6 94.4 0.23 9.8 0.062 34.3790 6 0.230 10.0 0 -99.0 0 -99.000 0 -99.00 0 -99.00 0 -99.00 427 3 3 1250.5 3.0576 34.4520 27.4681 59.2 93.7 0.36 15.9 0.061 34.4526 0 0.367 16.0 0 -99.0 0 -99.000 0 -99.00 0 -99.00 0 -99.00 426 2 2 1250.6 3.0578 34.4519 27.4680 59.1 93.7 0.36 15.9 0.061 34.4536 0 0.367 16.0 6 -99.0 0 -99.000 0 -99.00 0 -99.00 0 -99.00 425 1 1 1316.9 2.8465 34.4799 27.5095 59.1 93.5 0.47 20.4 0.062 -99.0000 0 0.465 20.2 0 -99.0 0 -99.000 0 -99.00 0 -99.00 0 -99.00