*2025/02/13 09:48:52.74 *IOS HEADER VERSION 2.0 2016/04/28 2016/06/13 IVF16 *FILE START TIME : UTC 2018/03/05 16:28:00.000 NUMBER OF RECORDS : 5 DATA DESCRIPTION : Bottle:Wire + CTD:Down FILE TYPE : ASCII NUMBER OF CHANNELS : 23 $TABLE: CHANNELS ! No Name Units Minimum Maximum !--- --------------------------------- --------------- -------------- -------------- 1 Sample_Number n/a 25 29 2 Pressure decibar 0.1 288 3 Depth metres 0.1 285.4 4 Temperature:Primary 'deg C (ITS90)' 7.2584 9.5884 5 Salinity:CTD PSS-78 28.5844 30.8495 6 Oxygen:Dissolved mL/L 2.82 6.8 7 Oxygen:Dissolved umol/kg 122.8 296.9 8 Fluorescence:URU:Wetlabs mg/m^3 0.23E-01 1.954 9 pH:SBE:Nominal n/a 8.486 8.798 10 Conductivity:Primary S/m 2.958914 3.377184 11 Depth:Nominal metres 0 285 12 Salinity:Bottle PSS-78 28.568 30.8466 13 Flag:Salinity:Bottle ' ' 14 Nitrate_plus_Nitrite umol/L 24.2 28.6 15 Flag:Nitrate_plus_Nitrite ' ' 16 Silicate umol/L 51.4 62.1 17 Flag:Silicate ' ' 18 Phosphate umol/L 2.14 2.64 19 Flag:Phosphate ' ' 20 Alkalinity:Total umol/kg 1931.73 2091.92 21 Flag:Alkalinity:Total ' ' 22 Carbon:Dissolved:Inorganic umol/kg 1910.85 2101.66 23 Flag:Carbon:Dissolved:Inorganic ' ' $END $TABLE: CHANNEL DETAIL ! No Pad Start Width Format Type Decimal_Places !--- ---- ----- ----- ------ ---- -------------- 1 -99 ' ' 5 I I 0 2 -99 ' ' 7 F R4 1 3 -99 ' ' 7 F R4 1 4 -99 ' ' 9 F R4 4 5 -99 ' ' 9 F R4 4 6 -99 ' ' 8 F R4 3 7 -99 ' ' 6 F R4 1 8 -99 ' ' 8 F R4 3 9 -99 ' ' 8 F R4 3 10 -99 ' ' 10 F R4 5 11 -99 ' ' 6 F ' ' 0 12 -99 ' ' 9 F R4 4 13 ' ' ' ' 3 NQ C ' ' 14 -99 ' ' 7 F R4 2 15 ' ' ' ' 3 NQ C ' ' 16 -99 ' ' 7 F R4 2 17 ' ' ' ' 3 NQ C ' ' 18 -99 ' ' 8 F R4 3 19 ' ' ' ' 3 NQ C ' ' 20 -99 ' ' 7 F R4 1 21 ' ' ' ' 3 NQ C ' ' 22 -99 ' ' 7 F R4 1 23 ' ' ' ' 3 NQ C ' ' $END $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 *ADMINISTRATION MISSION : 2018-96 AGENCY : IOS, Ocean Sciences Division, Sidney, B.C. PROJECT : Zooplankton - Strait of Georgia SCIENTIST : Young K. PLATFORM : Neocaligus *LOCATION STATION : 11 EVENT NUMBER : 23 LATITUDE : 49 42.39000 N ! (deg min) LONGITUDE : 124 43.51680 W ! (deg min) WATER DEPTH : 301 *INSTRUMENT TYPE : Sea-Bird CTD MODEL : SBE-25 SERIAL NUMBER : 0404 *HISTORY $TABLE: PROGRAMS ! Name Vers Date Time Recs In Recs Out ! -------- ------ ---------- -------- --------- --------- SPRD2IS 5.1 2018/05/24 12:47:09 5 5 CLEAN 5.2.2 2018/05/24 12:47:17 5 5 REMOVECH 8.2 2018/05/24 12:47:21 5 5 SORT 3.6 2018/05/24 12:47:24 5 5 HDREDIT2 3.1.1 2018/05/24 12:47:33 ? ? HDREDIT2 3.2 2020/01/22 14:20:16 ? ? REORDER 1.3.1 2021/03/16 10:47:40 ? ? CLEAN 5.2.4 2021/03/16 11:02:25 5 5 HDREDIT2 3.2 2022/06/06 12:01:43 ? ? HDREDIT2 3.2 2025/02/13 09:48:52 ? ? $END $REMARKS -CLEAN functions: 2018/05/24 12:47:16 20 Reset #RECS, MIN & MAX values in header. Change character data from " " to "0" in channels Flag:* Delete Empty Channels: 3 deleted. Set header Start and End times from the data. -REMOVECH 2018/05/24 12:47:21 The following CHANNEL(S) were removed: Date TIME:UTC -SORT parameters: 2018/05/24 12:47:24 Sorted in ascending order of channel Depth:Nominal [metres] -HEADER EDITS: 2018/05/24 12:47:33 Applied edit header: P:\Cruise_Data_Processing\2018-96\Processing\doc\HYDRO\2018-96-bot-hdr.txt Channel 2: Pressure:CTD [decibar] Format: F9.4 ==> F7.1 Channel 6: Oxygen:Dissolved:Volume:CTD [mL/L] Format: F9.4 ==> F7.2 Channel 7: Oxygen:Dissolved:Mass:CTD [umol/kg] Format: F7.2 ==> F6.1 Channel 8: Fluorescence:URU:CTD [mg/m^3] Name: Fluorescence:CTD ==> Fluorescence:URU:CTD Channel 11: Depth:Nominal [metres] Format: F6.0 ==> I6 Channel 14: Nitrate_plus_Nitrite [umol/L] Format: F6.1 ==> F7.2 Channel 16: Silicate [umol/L] Format: F6.1 ==> F7.2 Channel 18: Phosphate [umol/L] Format: F7.2 ==> F8.3 -HEADER EDITS: 2020/01/22 14:20:16 - none. -CLEAN functions: 2021/03/16 11:02:25 20 Reset #RECS, MIN & MAX values in header. -HEADER EDITS: 2022/06/06 12:01:43 Channel 20: Alkalinity:Total [umol/kg] Units: umol/L ==> umol/kg -HEADER EDITS: 2025/02/13 09:48:52 Channel 2: Pressure [decibar] Name: Pressure:CTD ==> Pressure Channel 3: Depth [metres] Name: Depth:CTD ==> Depth Channel 4: Temperature:Primary [deg C (ITS90)] Name: Temperature:CTD ==> Temperature:Primary Channel 6: Oxygen:Dissolved [mL/L] Name: Oxygen:Dissolved:Volume:CTD ==> Oxygen:Dissolved Format: F7.2 ==> F8.3 Channel 7: Oxygen:Dissolved [umol/kg] Name: Oxygen:Dissolved:Mass:CTD ==> Oxygen:Dissolved Channel 8: Fluorescence:URU:Wetlabs [mg/m^3] Name: Fluorescence:URU:CTD ==> Fluorescence:URU:Wetlabs Channel 10: Conductivity:Primary [S/m] Format: F10.6 ==> F10.5 Channel 20: Alkalinity:Total [umol/kg] Format: F8.2 ==> F7.1 Channel 22: Carbon:Dissolved:Inorganic [umol/kg] Format: F8.2 ==> F7.1 Channel 11: Depth:Nominal [metres] Format: I6 ==> F6.0 $END *COMMENTS Sample_Number 26: SAL: Leaky Niskin bottle; NUTS: sample not taken; DIC: Stopper not taped Analysis methods: ----------------- Chlorophyll samples were filtered onto 25mm GF/F filters and stored in glass scintillation vials in liquid nitrogen (onboard) and then at -80C (at IOS) prior to analysis. Samples were extracted in 90% acetone at -20C for 24 hours in the lab 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 in Room 2423 ~3 weeks after the cruise. 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 1.23-7.51ug/l. Average %CV for this cruise was 2.62% with 0 out of 11 duplicate pairs having a CV>10% and 0 out of 11 duplicate pairs having a CV>30%. Our average dataset %CV is 3.73 % for 2013 - 2017 so the overall quality of this dataset is excellent. For details see worksheet “CV%” in file QF2018-96CHL*.xlsx. Nutrient samples were collected in plastic tubes and quick frozen in aluminum blocks stored in a -20C freezer. All analysis was performed on frozen samples. They were analyzed using an Astoria analyzer following methods described in IOS Nutrient Methods (1996) Barwell-Clarke, J. and F. Whitney. For details see document NUTS_QF2018-96*.xlsx. Salinity samples were collected in 200 mL type II 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 within 13 to 17 days days after collection. For details, see document QF2018-96SAL*.xls. Dissolved inorganic carbon (DIC) was determined using coulometric analysis. Total alkalinity (Alk) was determined by potentiometric titration. Complete documentation on DIC, ALK analysis and precision estimates can be found in in the Metadata section of document QF2018-96_DIC*.xlsx. Note that samples with nominal depth 0 were surface samples with no matching CTD data, so the shallowest available CTD data were chosen. References: 1. 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. 2. 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. 3. A. Dickson, C. Goyet, Handbook of Methods for the Analysis of the Various Parameters of the Carbon Dioxide System in Sea Water, September 1994, U.S. Department of Energy * For PDF versions of these papers see folder \\Cruise_Data\DOCUMENTS\Analysis Reference Papers --------------------------------------------------------------------------------- CTD Data Processing Notes: -------------------------- The CTD data in these files were extracted from CTD profile files after the recalibration of the CTD dissolved oxygen channels. Fluorescence, Dissolved Oxygen and pH:SBE data are nominal and unedited, except that some records were removed in editing temperature and salinity. Channel Fluorescence:URU:Wetlabs had some very small negative values in deep water which were set to 0 using program Calibrate. There were 8 deep salinity bottle samples during this cruise. The CTD salinity values were higher than the bottles by a median value of 0.0031psu which is within the expected accuracy. Some of this difference may be due to the fact that flushing of Niskin bottles is somewhat inefficient so that the water in the bottles may have come from slightly higher in the water column. A comparison with an SBE911+ cast during a previous cruise also showed that the salinity was likely within expected accuracy. No recalibration was applied to the CTD salinity. There was no dissolved oxygen sampling during this cruise or previous cruises using this equipment in 2017. An inter-ship comparison of 2 casts from a June 2017 cruise using these sensors with a cast from a cruise that did include calibration sampling, suggested that dissolved oxygen values were likely low by up to 4%. A comparison with an SBE911+ cast at the same site during a recent cruise had a lot of scatter but suggested that dissolved oxygen was reading low by at least 5%. Channel Oxygen:Dissolved:SBE was recalibrated by adding 5% to all values. WARNING: The pH:SBE:Nominal data should be used with caution; no field calibration data were available at the time of processing. Calibration is required for each cast to get absolute values, although general trends within a cast are likely real. For details on the processing see processing report: 2018-96-Processing_Report.doc. --------------------------------------------------------------------------------- !-1-- --2--- --3--- ---4---- ---5---- ---6--- --7-- ---8--- ---9--- ----10--- --11- ---12--- 13 --14-- 15 --16-- 17 ---18-- 19 --20-- 21 --22-- 23 !Samp Pressu Depth Temperat Salinity Oxygen: Oxyge Fluores pH:SBE: Conductiv Depth Salinity Fl Nitrat Fl Silica Fl Phospha Fl Alkali Fl Carbon Fl !le_ re ure: :CTD Dissolv n: cence: Nominal ity: : :Bottle ag e_ ag te ag te ag nity: ag :Disso ag !Numb Primary ed Disso URU: Primary Nomin ~o plus_ ~t ~i ~p Total ~T lved: ~g !er lved Wetlabs al tt Nitrit ri ca ha ot Inorga an ! le e te te te al nic ic !---- ------ ------ -------- -------- ------- ----- ------- ------- --------- ----- -------- -- ------ -- ------ -- ------- -- ------ -- ------ -- *END OF HEADER 26 0.1 0.1 7.2584 28.5844 6.800 296.9 1.796 8.798 2.95891 0. 28.5680 3 -99.00 9 -99.00 9 -99.000 9 1982.7 0 1910.8 3 27 5.0 5.0 7.2762 28.5927 6.760 295.1 1.954 8.797 2.96127 5. 28.5777 0 24.20 0 51.40 0 2.140 0 1931.7 0 1917.5 0 28 10.0 9.9 7.3305 28.6250 6.680 291.6 1.852 8.778 2.96871 10. 28.5884 6 24.20 0 52.30 0 2.170 0 1984.9 6 1916.0 6 29 20.0 19.9 7.6042 28.9384 5.970 260.5 0.652 8.697 3.02001 20. 28.8947 0 26.20 6 55.80 6 2.350 6 2003.6 0 1952.0 0 25 288.0 285.4 9.5884 30.8495 2.820 122.8 0.023 8.486 3.37718 285. 30.8466 0 28.60 0 62.10 0 2.640 0 2091.9 0 2101.7 0