*2021/04/14 13:43:22.24 *IOS HEADER VERSION 2.0 2016/04/28 2016/06/13 IVF16 *FILE START TIME : UTC 2018/05/27 14:42:00.000 TIME ZERO : UTC 1980/01/01 00:00:00.000 NUMBER OF RECORDS : 2 DATA DESCRIPTION : Bottle:Wire + CTD:Down FILE TYPE : ASCII NUMBER OF CHANNELS : 13 $TABLE: CHANNELS ! No Name Units Minimum Maximum !--- -------------------------- --------------- -------------- -------------- 1 Sample_Number n/a 13 14 2 Pressure decibar 5 406 3 Depth metres 5 402.2 4 Temperature:Primary 'deg C (ITS90)' 9.0506 15.3673 5 Salinity:T0:C0 PSS-78 18.8515 31.0198 6 Oxygen:Dissolved:SBE mL/L 3.15 6.14 7 Oxygen:Dissolved:SBE umol/kg 137.5 270.3 8 Fluorescence:URU:Wetlabs mg/m^3 0.45E-01 5.277 9 pH:SBE:Nominal n/a 8.407 9.117 10 Conductivity:Primary S/m 2.472318 3.35324 11 Depth:Nominal metres 5 408 12 Salinity:Bottle PSS-78 31.0195 31.0195 13 Flag:Salinity:Bottle ' ' $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 ' ' 7 F R4 2 7 -99 ' ' 6 F R4 1 8 -99 ' ' 8 F R4 3 9 -99 ' ' 8 F R4 3 10 -99 ' ' 10 F R4 6 11 -99 ' ' 7 F R4 1 12 -99 ' ' 9 F R4 4 13 -99 ' ' 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 : 2018-036 AGENCY : IOS, Ocean Sciences Division, Sidney, B.C. COUNTRY : Canada PROJECT : Strait of Georgia Zooplankton SCIENTIST : Young K. PLATFORM : Neocaligus *LOCATION GEOGRAPHIC AREA : Strait of Georgia STATION : 24 EVENT NUMBER : 21 LATITUDE : 49 30.29400 N ! (deg min) LONGITUDE : 124 5.96580 W ! (deg min) WATER DEPTH : 426 *INSTRUMENT TYPE : Sea-Bird CTD MODEL : SBE-25 SERIAL NUMBER : 0404 *HISTORY $TABLE: PROGRAMS ! Name Vers Date Time Recs In Recs Out ! -------- ------ ---------- -------- --------- --------- SPRD2IS 5.2 2018/10/19 16:39:57 2 2 CLEAN 5.2.3 2018/10/22 08:27:52 2 2 REMOVECH 8.2 2018/10/22 08:28:15 2 2 SORT 3.6 2018/10/22 08:28:20 2 2 HDREDIT2 3.1.1 2018/10/22 10:13:40 ? ? HDREDIT2 3.2 2020/01/22 14:18:58 ? ? CLEAN 5.2.4 2021/03/17 10:47:30 2 2 CLEAN 5.2.4 2021/04/14 13:43:22 2 2 $END $REMARKS -CLEAN functions: 2018/10/22 08:27:51 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 2018/10/22 08:28:15 The following CHANNEL(S) were removed: Date TIME:UTC -SORT parameters: 2018/10/22 08:28:20 Sorted in ascending order of channel Depth:Nominal [metres] -HEADER EDITS: 2018/10/22 10:13:40 Applied edit header: P:\Cruise_Data_Processing\2018-036\Processing\doc\HYDRO\2018-036-bot-hdr.txt Channel 2: Pressure [decibar] Name: Pressure:CTD ==> Pressure Format: F9.4 ==> F7.1 Channel 3: Depth [metres] Name: Depth:CTD ==> Depth Channel 4: Temperature:Primary [deg C (ITS90)] Name: Temperature:CTD ==> Temperature:Primary Channel 5: Salinity:T0:C0 [PSS-78] Name: Salinity:CTD ==> Salinity:T0:C0 Channel 6: Oxygen:Dissolved:SBE [mL/L] Name: Oxygen:Dissolved:Volume:CTD ==> Oxygen:Dissolved:SBE Format: F9.4 ==> F7.2 Channel 7: Oxygen:Dissolved:SBE [umol/kg] Name: Oxygen:Dissolved:Volume:CTD ==> Oxygen:Dissolved:SBE Channel 8: Fluorescence:URU:Wetlabs [mg/m^3] Name: Fluorescence:CTD ==> Fluorescence:URU:Wetlabs Channel 11: Depth:Nominal [metres] Format: F6.0 ==> F7.1 -HEADER EDITS: 2020/01/22 14:18:58 - none. -CLEAN functions: 2021/03/17 10:47:29 20 Reset #RECS, MIN & MAX values in header. -CLEAN functions: 2021/04/14 13:43:22 20 Reset #RECS, MIN & MAX values in header. Change Pad Value to -99 in All Channels. Set event to last 4 characters of file name $END *COMMENTS Analysis methods: ----------------------- Chlorophyll samples were filtered onto 25mm GF/F filters and stored in cryovials in liquid nitrogen dry shipper onboard, then stored at IOS at -80C prior to analysis Samples were extracted in 90% acetone at -20C for 24 hours in the lab and analyzed on a Turner 10AU flourometer 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 ~6 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. Chlorophyll values ranged from 0.60 to 11.42ug/l. Average %CV for this cruise was 5.57 with 0 out of 3 duplicate pairs having a CV>10% and 0 out of 3 duplicate pairs having a CV>30%. Our average dataset %CV is 3.73% for 2013-2017 so the overall quality of this dataset is good. For details see worksheet “CV%” in file QF2018-36 CHL*.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 21 to 26 days days after collection. For details, see document QF2018-036SAL*.xls. 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. * For PDF versions of these papers see folder \\Cruise_Data\DOCUMENTS\Analysis Reference Papers --------------------------------------------------------------------------------- CTD Data Processing Notes: ---------------------------- Conductivity, Fluorescence:URU:Wetlabs and pH:SBE data are nominal and unedited except that some records were removed in editing temperature and salinity. There were 6 deep salinity bottle samples from this cruise. The CTD salinity values were higher than the bottles by a median value of 0.002psu. However, incomplete flushing of Niskin bottles may lead to bottle values being lower than in situ values. Thus the CTD may look like it is reading higher than it really is. The CTD salinity data are considered +/- 0.003psu which is well within the expected accuracy for this equipment. 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 February 2018 cruise had a lot of scatter but suggested that dissolved oxygen was reading low 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. Warning: While the CTD fluorescence data are expressed in concentration units, they do not always compare well to extracted chlorophyll samples. For details on the processing see document: 2018-036_Processing_Report.doc. --------------------------------------------------------------------------------- !-1-- --2--- --3--- ---4---- ---5---- --6--- --7-- ---8--- ---9--- ----10--- --11-- ---12--- 13 !Samp Pressu Depth Temperat Salinity Oxygen Oxyge Fluores pH:SBE: Conductiv Depth: Salinity Fl !le_ re ure: :T0:C0 : n: cence: Nominal ity: Nomina :Bottle ag !Numb Primary Dissol Disso URU: Primary l ~o !er ved: lved: Wetlabs tt ! SBE SBE le !---- ------ ------ -------- -------- ------ ----- ------- ------- --------- ------ -------- -- *END OF HEADER 14 5.0 5.0 15.3673 18.8515 6.14 270.3 5.277 9.117 2.472318 5.0 -99.0000 0 13 406.0 402.2 9.0506 31.0198 3.15 137.5 0.045 8.407 3.353240 408.0 31.0195 6