*2023/05/25 12:54:28.12 *IOS HEADER VERSION 2.0 2016/04/28 2016/06/13 IVF16 *FILE START TIME : UTC 2017/08/18 06:49:50.000 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 : C5195F9F NUMBER OF CHANNELS : 12 $TABLE: CHANNELS ! No Name Units Minimum Maximum !--- ----------------------------- --------------- -------------- -------------- 1 Sample_Number n/a 146 169 2 Bottle_Number n/a 1 24 3 Bottle:Firing_Sequence n/a 1 24 4 Pressure:CTD dbar 200.4 500.5 5 Temperature:CTD deg_C_(ITS90) 5.1222 7.1859 6 Salinity:CTD PSS-78 33.939 34.1222 7 Sigma-t:CTD kg/m^3 26.5833 26.991 8 Transmissivity:CTD %/m 61.8 63 9 Oxygen:Dissolved:CTD:Volume ml/l 0.64 2.22 10 Oxygen:Dissolved:CTD:Mass µmol/kg 27.8 96.5 11 Fluorescence:CTD:Seapoint mg/m^3 0.34E-01 0.55E-01 12 PAR:CTD µE/m^2/sec 0 0 $END $TABLE: CHANNEL DETAIL ! No Pad Start Width Format Type Decimal_Places !--- ----- ----- ----- ------ ---- -------------- 1 -99 ' ' 5 I I 0 2 -99 ' ' 5 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 ' ' 9 F R4 4 8 -99 ' ' 6 F ' ' 1 9 -99 ' ' 7 F ' ' 2 10 -99 ' ' 6 F ' ' 1 11 -99 ' ' 8 F ' ' 3 12 -99 ' ' 7 F ' ' 1 $END *ADMINISTRATION MISSION : 2017-008 AGENCY : IOS, Ocean Sciences Division, Sidney, BC COUNTRY : Canada PROJECT : Line P SCIENTIST : Robert M. PLATFORM : John P. Tully *LOCATION GEOGRAPHIC AREA : North-East Pacific STATION : P4 EVENT NUMBER : 27 LATITUDE : 48 38.94000 N ! (deg min) LONGITUDE : 126 40.66000 W ! (deg min) WATER DEPTH : 1333 *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 14 - 28 days after collection. For details on duplicate analysis see document 2017-008_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 document 2017-008_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 2017-008_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 up to ~6 weeks of 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. Precision Statement: Chlorophyll values ranged from 0.02 to 12.28 µg/l. Average CV for this cruise was 3.36% with 3 out of 69 duplicate pairs having a CV > 10% and 0 out of 69 duplicate pairs having a CV > 30%. Our average dataset CV is 3.72% for 2013 - 2016 so the overall quality of this dataset is very good. For details on duplicates see file 2017-008_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 100 deg C (with a Dewar containing boiling water) onto a Chromasorb 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. For more details see file 2017-008_DMS_report.pdf and for duplicate analysis see 2017-008_DMS.pdf. DMSP-D: 20-75 ml of seawater were allowed to flow directly 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. DMSP-T: 3.5 ml of seawater were collected directly from the Niskin into a polypropylene tube 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 nM, so “0” values should be interpreted as <0.1 nM. DMSP data are limited to 2 significant figures. For details on analysis see document 2017-008_DMS_report.pdf. Dissolved Organic Carbon (DOC), Total Organic Carbon (TOC), Total Dissolved Nitrogen (TDN), and Total Nitrogen (TN) samples were collected in 80 ml polycarbonate bottles and frozen until analysis. DOC/TDN samples were filtered inline from the Niskin bottles, using acid-washed filter holders and tubing and pre-combusted GF/F filters. For analysis, samples were thawed and acidified with 4M HCl at a ratio of 100 µl HCL to 40 ml seawater. DOC/TDN samples were collected for depths < 250 meters, and TOC/TN samples were collected for depths > 250 meters. HPLC samples were filtered onto 47mm GF/F filters and stored at -80C prior to analysis. Samples were extracted in 95% methanol at -20C for 24 hours and analyzed on a WATERS 2695 HPLC separations system as detailed in Nemcek and Pena, 2014. Analysis was performed ~2 months after collection. The average of two samples is reported. Variability is assessed as the CV (std dev/mean*100) for duplicate pairs. All pigments below the limit of detection (LOD) are assigned a zero value. TChl-a is the sum of Chl-a, DVchl-a, Chlide-a and Me-chlide. 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. 5. Nemcek, N. and Peña, M.A. 2014. Institute of Ocean Sciences Protocols for Phytoplankton Pigment Analysis by HPLC. Can. Tech. Rep. Fish. Aquat. Sci. 3117: x + 80 p. Data Processing Notes: ---------------------- Transmissivity, Fluorescence and PAR data are nominal and unedited except that some records were removed in editing temperature and salinity. Oxygen:Dissolved:CTD was calibrated using the method described in SeaBird Application Note #64-2, June 2012 revision, except that a small offset in the fit was allowed. The fluorometer values drifted during the cruise starting with slightly high dark values early in the cruise and rising to about 0.20 µg/l by the end. A time-dependent correction was applied based on values at 4000 dbar with an adjustment to ensure no negative values were produced. This is an estimate and produces dark values at 2000 dbar ranging from 0.02 µg/l to 0.09 µg/l. NOTE: While the CTD fluorescence 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: 2017-008-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-- !Samp Bott Bo Pressu Temperat Salinity Sigma-t: Trans Oxygen Oxyge Fluores PAR: !le_ le_ tt re:CTD ure:CTD :CTD CTD missi :Disso n:Dis cence: CTD !Numb Numb ~u vity: lved: solve CTD: !er er en CTD CTD: d:CTD Seapoin ! ce Volume :Mass t !---- ---- -- ------ -------- -------- -------- ----- ------ ----- ------- ------ *END OF HEADER 169 24 24 201.0 7.1850 33.9392 26.5835 61.8 2.22 96.5 0.046 0.0 168 23 23 201.2 7.1856 33.9391 26.5834 61.8 2.21 96.3 0.045 0.0 167 22 22 200.5 7.1858 33.9390 26.5833 61.8 2.21 96.3 0.046 0.0 166 21 21 200.4 7.1839 33.9392 26.5837 61.8 2.22 96.4 0.046 0.0 165 20 20 200.9 7.1859 33.9391 26.5833 61.8 2.22 96.5 0.046 0.0 164 19 19 201.3 7.1851 33.9391 26.5834 61.9 2.22 96.4 0.055 0.0 163 18 18 298.8 6.1426 34.0057 26.7748 62.0 1.50 65.3 0.038 0.0 162 17 17 299.1 6.1422 34.0058 26.7749 62.0 1.50 65.3 0.036 0.0 161 16 16 297.8 6.1432 34.0056 26.7746 62.0 1.50 65.3 0.037 0.0 160 15 15 298.8 6.1426 34.0056 26.7747 62.0 1.50 65.3 0.037 0.0 159 14 14 299.1 6.1415 34.0058 26.7750 62.0 1.50 65.3 0.036 0.0 158 13 13 298.5 6.1422 34.0057 26.7748 62.1 1.50 65.3 0.037 0.0 157 12 12 399.5 5.2950 34.0144 26.8855 63.0 1.20 52.2 0.036 0.0 156 11 11 399.8 5.2932 34.0131 26.8846 63.0 1.20 52.2 0.034 0.0 155 10 10 399.8 5.3019 34.0160 26.8859 62.9 1.20 52.1 0.034 0.0 154 9 9 399.8 5.3032 34.0160 26.8858 63.0 1.21 52.7 0.034 0.0 153 8 8 399.4 5.3051 34.0161 26.8856 63.0 1.22 52.9 0.035 0.0 152 7 7 398.9 5.2831 34.0122 26.8851 63.0 1.21 52.7 0.034 0.0 151 6 6 500.0 5.1228 34.1221 26.9909 62.3 0.64 27.8 0.035 0.0 150 5 5 500.1 5.1236 34.1220 26.9907 62.3 0.64 27.8 0.035 0.0 149 4 4 500.1 5.1234 34.1220 26.9907 62.3 0.64 27.8 0.034 0.0 148 3 3 500.4 5.1234 34.1220 26.9907 62.3 0.64 27.8 0.034 0.0 147 2 2 500.5 5.1222 34.1222 26.9910 62.3 0.64 27.8 0.034 0.0 146 1 1 499.7 5.1238 34.1219 26.9906 62.3 0.64 27.8 0.034 0.0