*2020/05/19 12:14:35.50 *IOS HEADER VERSION 2.0 2016/04/28 2016/06/13 IVF16 *FILE START TIME : UTC 2019/10/06 20:18:00.000 NUMBER OF RECORDS : 1 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 91 91 2 Pressure decibar 8.538 8.538 3 Depth metres 8.5 8.5 4 Temperature:Primary 'deg C (ITS90)' 10.2374 10.2374 5 Salinity:T0:C0 PSS-78 29.871 29.871 6 Oxygen:Dissolved:SBE mL/L 3.814 3.814 7 Oxygen:Dissolved:SBE umol/kg 166.454 166.454 8 Fluorescence:URU:Wetlabs mg/m^3 1.315 1.315 9 pH:SBE:Nominal n/a 8.312 8.312 10 Conductivity:Primary S/m 3.322658 3.322658 11 Chlorophyll:Extracted mg/m^3 0.9 0.9 12 Flag:Chlorophyll:Extracted ' ' 13 Phaeo-Pigment:Extracted mg/m^3 0.45 0.45 $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 ' ' 8 F R4 3 6 -99 ' ' 7 F R4 2 7 -99 ' ' 6 F ' ' 1 8 -99 ' ' 8 F R4 3 9 -99 ' ' 8 F R4 3 10 -99 ' ' 10 F R4 6 11 -99 ' ' 7 F R4 2 12 ' ' ' ' 3 NQ C ' ' 13 -99 ' ' 7 F R4 2 $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 : 2019-125 AGENCY : PBS, Ecosystem Science Division, Nanaimo, B.C. COUNTRY : Canada PROJECT : BCSI Juvenile Salmon SCIENTIST : Anderson E. PLATFORM : Sea Crest *LOCATION GEOGRAPHIC AREA : 'Johnstone Strait, Queen Charlotte Strait, Queen' CONTINUED : ' Charlotte Sound and Inlets' STATION : BR01 EVENT NUMBER : 91 LATITUDE : 50 52.41960 N ! (deg min) LONGITUDE : 126 53.92980 W ! (deg min) WATER DEPTH : 174 *INSTRUMENT TYPE : Sea-Bird CTD MODEL : SBE-25 SERIAL NUMBER : 0404 *HISTORY $TABLE: PROGRAMS ! Name Vers Date Time Recs In Recs Out ! -------- ------ ---------- -------- --------- --------- SPRD2IS 5.3.1 2020/05/19 09:33:41 1 1 CLEAN 5.2.4 2020/05/19 09:34:31 1 1 REMOVECH 8.2 2020/05/19 09:34:36 1 1 CHGUNITS 3.1.2 2020/05/19 12:09:55 1 1 REORDER 1.3.1 2020/05/19 12:10:15 ? ? HDREDIT2 3.2 2020/05/19 12:14:35 ? ? $END $REMARKS -CLEAN functions: 2020/05/19 09:34:28 20 Change character data from " " to "0" in channels Flag:* Set header Start and End times from the data. -REMOVECH 2020/05/19 09:34:36 The following CHANNEL(S) were removed: Date TIME:UTC -CHANGE units: Temperature reference channel: Temperature:CTD Salinity reference channel: Salinity:CTD 'Oxygen:Dissolved:Volume:CTD' changed from mL/L to umol/kg -HEADER EDITS: 2020/05/19 12:14:35 Applied edit header: D:\Telework\2019-125\Processing\doc\hydro\2019-125-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 Format: F9.4 ==> F8.3 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:Mass ==> Oxygen:Dissolved:SBE Channel 8: Fluorescence:URU:Wetlabs [mg/m^3] Name: Fluorescence:CTD ==> Fluorescence:URU:Wetlabs Channel 9: pH:SBE:Nominal [n/a] Units: ==> n/a Channel 10: Conductivity:Primary [S/m] Name: Conductivity:CTD ==> Conductivity:Primary $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 ~4-7 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 0.21 to 17.78ug/l in 37 samples. Average %CV for this cruise was 5.4 with 6 out of 37 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 acceptable. For details see worksheet “CV%” in file 2019-125 CHL QF*.xlsx. 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. * For PDF versions of these papers see folder \\Cruise_Data\DOCUMENTS\Analysis Reference Papers --------------------------------------------------------------------------------- CTD Data Processing Notes: ---------------------------- Extracted Chlorophyll samples were taken from a 1.7L Niskin bottle that was mounted 1.5m above the CTD and was closed when the CTD was at about 10m. Conductivity, Fluorescence:URU:Wetlabs and pH:SBE data are nominal and unedited except that some records were removed in editing temperature and salinity. The CTD was soaked at 10m and then returned to the surface before running the full cast. However, the total soak time was usually only about 1 minute rather than the the recommended 2 minutes. In some cases the DO signal turns on right at the end of the soak or even after the downcast began so there may not have been time for the sensor to equilibrate. There was no salinity or dissolved oxygen calibration sampling from this cruise, or from the 2 other cruises that used these sensors since they were last serviced at the factory. There are concerns about the reliability of the salinity data so they are only reported with 3 decimal places. The problems with salinity are somewhat random unstable excursions that derive from the conductivity channel and are likely due to variations in the alignment with temperature data. This may be due to variable flow rates possibly due to a pump/plumbing problem. The problems are most notable where vertical salinity gradients are high and where descent rates are highly variable. The temperature data and dissolved oxygen data mostly look reasonable during downcasts. There were problems in both during upcasts. While the CTD fluorescence data are expressed in concentration units, they do not always compare well to extracted chlorophyll samples, especially far from shore. These casts were mostly near shore and the CTD fluorescence values compare quite well with near-surface extracted chlorophyll samples. 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 document: 2019-125_Processing_Report.doc. --------------------------------------------------------------------------------- !-1-- --2--- --3--- ---4---- ---5--- --6--- --7-- ---8--- ---9--- ----10--- --11-- 12 --13-- !Samp Pressu Depth Temperat Salinit Oxygen Oxyge Fluores pH:SBE: Conductiv Chloro Fl Phaeo- !le_ re ure: y:T0:C0 : n: cence: Nominal ity: phyll: ag Pigmen !Numb Primary Dissol Disso URU: Primary Extrac ~a t: !er ved: lved: Wetlabs ted ct Extrac ! SBE SBE ed ted !---- ------ ------ -------- ------- ------ ----- ------- ------- --------- ------ -- ------ *END OF HEADER 91 8.5 8.5 10.2374 29.871 3.81 166.5 1.315 8.312 3.322658 0.90 6 0.45