*2018/04/24 10:35:11.57 *IOS HEADER VERSION 2.0 2016/04/28 2016/06/13 IVF16 *FILE START TIME : UTC 2017/10/09 02:02:00.000 NUMBER OF RECORDS : 1 DATA DESCRIPTION : Bottle:Wire + CTD:Down FILE TYPE : ASCII NUMBER OF CHANNELS : 21 $TABLE: CHANNELS ! No Name Units Minimum Maximum !--- ---------------------------- --------------- -------------- -------------- 1 Sample_Number n/a 137 137 2 Pressure decibar 10 10 3 Depth metres 9.9 9.9 4 Temperature:Primary 'deg C (ITS90)' 10.05 10.05 5 Salinity:T0:C0 PSS-78 30.4411 30.4411 6 Fluorescence:URU:Wetlabs mg/m^3 0.351 0.351 7 pH:SBE:Nominal n/a 8.498 8.498 8 Oxygen:Dissolved:SBE mL/L 3.9 3.9 9 Oxygen:Dissolved:SBE umol/kg 170.1 170.1 10 Depth:Nominal metres 10 10 11 Salinity:Bottle PSS-78 30.3727 30.3727 12 Flag:Salinity:Bottle ' ' 13 Chlorophyll:Extracted mg/m^3 0.63 0.63 14 Flag:Chlorophyll:Extracted ' ' 15 Phaeo-Pigment:Extracted mg/m^3 0.24 0.24 16 Nitrate_plus_Nitrite umol/L 0.2E-01 0.2E-01 17 Flag:Nitrate_plus_Nitrite ' ' 18 Silicate umol/L 1.66 1.66 19 Flag:Silicate ' ' 20 Phosphate umol/L 0.185 0.185 21 Flag:Phosphate ' ' $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 ' ' ' ' F8.3 R4 ' ' 8 -99 ' ' 7 F R4 2 9 -99 ' ' 6 F R4 1 10 -99 ' ' ' ' F6.0 R4 ' ' 11 -99 ' ' 9 F R4 4 12 ' ' ' ' 3 NQ C ' ' 13 -99 ' ' 7 F R4 2 14 ' ' ' ' 3 NQ C ' ' 15 -99 ' ' 7 F R4 2 16 -99 ' ' ' ' F7.2 R4 ' ' 17 ' ' ' ' 3 NQ C ' ' 18 -99 ' ' ' ' F7.2 R4 ' ' 19 ' ' ' ' 3 NQ C ' ' 20 -99 ' ' ' ' F8.3 R4 ' ' 21 ' ' ' ' 3 NQ C ' ' $END $REMARKS Flag channels were initialized with zeros. Non-zero values have the following significance: ---------------------------------------------------------------------------------- 1 = Sample for this measurement was collected but not analyzed. Sample lost. 2 = Acceptable Measurement 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 : 2017-78 AGENCY : PBS, Ecosystem Sciences Division, Nanaimo, B.C. PROJECT : Coastal Ocean Salmon SCIENTIST : King J. PLATFORM : Sea Crest *LOCATION STATION : JS07 EVENT NUMBER : 137 LATITUDE : 50 23.47200 N ! (deg min) LONGITUDE : 125 32.85000 W ! (deg min) WATER DEPTH : 45 *INSTRUMENT TYPE : Sea-Bird 25 CTD *HISTORY $TABLE: PROGRAMS ! Name Vers Date Time Recs In Recs Out ! -------- ------ ---------- -------- --------- --------- SPRD2IS 5.1 2018/04/24 10:33:21 1 1 CLEAN 5.2.2 2018/04/24 10:34:47 1 1 REMOVECH 8.2 2018/04/24 10:35:01 1 1 HDREDIT2 3.1.1 2018/04/24 10:35:11 ? ? $END $REMARKS -CLEAN functions: 2018/04/24 10:34:45 20 Reset #RECS, MIN & MAX values in header. Change character data from " " to "0" in channels Flag:* Delete Empty Channels: 0 deleted. Set header Start and End times from the data. -REMOVECH 2018/04/24 10:35:01 The following CHANNEL(S) were removed: Date TIME:UTC -HEADER EDITS: 2018/04/24 10:35:11 Applied edit header: P:\Cruise_Data_Processing\2017-78\Processing\doc\HYDRO\2017-78-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 8: Oxygen:Dissolved:SBE [mL/L] Name: Oxygen:Dissolved:Volume:CTD ==> Oxygen:Dissolved:SBE Channel 9: Oxygen:Dissolved:SBE [umol/kg] Name: Oxygen:Dissolved:Mass:CTD ==> Oxygen:Dissolved:SBE Channel 6: Fluorescence:URU:Wetlabs [mg/m^3] Name: Fluorescence:CTD ==> Fluorescence:URU:Wetlabs $END *COMMENTS Analysis methods: ----------------- Chlorophyll samples were filtered onto 25mm GF/F filters and stored in glass scintillation vials at -20C 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 ~1 week 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 0.34-10.24ug/l. Average %CV for this cruise was 4.68% with 3 out of 29 duplicate pairs having a CV>10% and 0 out of 29 duplicate pairs having a CV>30%. Our average dataset %CV is 2.84 % for 2013 - 2016 so the overall quality of this dataset is good. For details see worksheet “CV%” in file QF2017-78CHL*.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_QF2017-78_2NOV207.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 2 to 12 days days after collection. For details, see document QF2017-78SAL.xls. 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: -------------------------- The length of the surface soaks were shorter than recommended with many being less than 75 seconds. This does not allow enough time for equilibration of pumped channels. The soaks were generally at about 5-6m with no return to the surface before the full cast was run. 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 was no deep salinity bottle 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 the salinity values from this CTD were reasonably accurate. There was near-surface salinity sampling during this cruise but the results of a comparison with the CTD data are considered unreliable. An initial examination of an early 2018 cruise with the same equipment and deep sampling suggests that the CTD salinity values are quite accurate. 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%. That error is likely to have increased with time. 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: 2017-78-Processing_Report.doc. --------------------------------------------------------------------------------- !-1-- --2--- --3--- ---4---- ---5---- ---6--- ---7--- --8--- --9-- --10- ---11--- 12 --13-- 14 --15-- --16-- 17 --18-- 19 ---20-- 21 !Samp Pressu Depth Temperat Salinity Fluores pH:SBE: Oxygen Oxyge Depth Salinity Fl Chloro Fl Phaeo- Nitrat Fl Silica Fl Phospha Fl !le_ re ure: :T0:C0 cence: Nominal : n: : :Bottle ag phyll: ag Pigmen e_ ag te ag te ag !Numb Primary URU: Dissol Disso Nomin ~o Extrac ~a t: plus_ ~t ~i ~p !er Wetlabs ved: lved: al tt ted ct Extrac Nitrit ri ca ha ! SBE SBE le ed ted e te te te !---- ------ ------ -------- -------- ------- ------- ------ ----- ----- -------- -- ------ -- ------ ------ -- ------ -- ------- -- *END OF HEADER 137 10.0 9.9 10.0500 30.4411 0.351 8.498 3.90 170.1 10. 30.3727 0 0.63 36 0.24 0.02 6 1.66 6 0.185 6