*2017/11/23 16:51:41.83 *IOS HEADER VERSION 2.0 2016/04/28 2016/06/13 IVF16 *FILE START TIME : UTC 2017/03/26 16:38:00.000 NUMBER OF RECORDS : 2 DATA DESCRIPTION : Bottle:Wire + CTD:Down FILE TYPE : ASCII NUMBER OF CHANNELS : 12 $TABLE: CHANNELS ! No Name Units Minimum Maximum !--- ---------------------------- --------------- -------------- -------------- 1 Sample_Number n/a 19 20 2 Pressure decibar 1.116 4.992 3 Depth metres 1.1 5 4 Temperature:Primary 'deg C (ITS90)' 7.9046 8.09 5 Salinity:T0:C0 PSS-78 27.5403 29.0386 6 Oxygen:Dissolved:SBE mL/L 6.168 7.706 7 Oxygen:Dissolved:SBE umol/kg 269.3 336.8 8 Fluorescence:URU:Wetlabs mg/m^3 1.389 3.697 9 Depth:Nominal metres 0 5 10 Chlorophyll:Extracted mg/m^3 2.56 5.95 11 Flag:Chlorophyll:Extracted ' ' 12 Phaeo-Pigment:Extracted mg/m^3 0.74 1.07 $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 ' ' ' ' ' ' F6.0 R4 ' ' 10 -99 ' ' 7 F R4 2 11 ' ' ' ' 3 NQ C ' ' 12 -99 ' ' 7 F R4 2 $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 : 2017-07 AGENCY : IOS, Ocean Sciences Division, Sidney, B.C. PROJECT : Strait of Georgia Zooplankton SCIENTIST : Young K. PLATFORM : Salacia *LOCATION STATION : SC-04 EVENT NUMBER : 51 LATITUDE : 48 43.51980 N ! (deg min) LONGITUDE : 123 24.96000 W ! (deg min) WATER DEPTH : 80 *INSTRUMENT TYPE : Sea-Bird CTD MODEL : SBE25plus SERIAL NUMBER : 1123 *HISTORY $TABLE: PROGRAMS ! Name Vers Date Time Recs In Recs Out ! -------- ------ ---------- -------- --------- --------- SPRD2IS 5.1 2017/11/23 16:46:59 2 2 CLEAN 5.2.2 2017/11/23 16:50:35 2 2 REMOVECH 8.2 2017/11/23 16:50:54 2 2 HDREDIT2 3.1.1 2017/11/23 16:51:41 ? ? $END $REMARKS -CLEAN functions: 2017/11/23 16:50:35 20 Reset #RECS, MIN & MAX values in header. Change character data from " " to "0" in channels Flag:* Delete Empty Channels: 2 deleted. Set event to last 4 characters of file name Set header Start and End times from the data. -REMOVECH 2017/11/23 16:50:54 The following CHANNEL(S) were removed: Date TIME:UTC -HEADER EDITS: 2017/11/23 16:51:41 Applied edit header: P:\Cruise_Data_Processing\2017-07\Processing\doc\HYDRO\2017-07-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:Mass:CTD ==> Oxygen:Dissolved:SBE Format: F7.2 ==> F6.1 Channel 8: Fluorescence:URU:Wetlabs [mg/m^3] Name: Fluorescence:CTD ==> Fluorescence:URU:Wetlabs $END *COMMENTS Sample_Number 20: CHL: %CV>30 Salinity samples were gathered at the bottom of CTD casts using a Niskin bottle attached about 1m above the CTD. Extracted chlorophyll samples were mostly taken at the end of CTD casts, but for the Halibut Bank casts there were no CTD casts. 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 up to 6 weeks after each leg of 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 0.38-30.46 ug/l. Average %CV for this cruise was 11.31% with 11 out of 40 duplicate pairs having a CV>15% and 1 out of 40 duplicate pairs having a CV>50%. Our average dataset %CV is 2.83 % for 2013 - 2015. These samples were small volume to allow syringe filtration which likely affected variance. For details see worksheet “CV%” in file QF2016-09CHL*.xlsx. 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 at IOS on a Guildline 8400B Salinometer (S/N 68572) standardized with IAPSO standard seawater approximately 5 to 8 days after collection. For details see documents QF2016-09_TRIP 1 SAL*.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. 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: -------------------------- Dissolved Oxygen and Fluorescence data are nominal and unedited, except that some records were removed in editing temperature and salinity. 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 suggested that extracted chlorophyll values be checked where available. Comparison with bottles suggests that the CTD salinity is reasonably close to bottle salinity for both conductivity sensors, but there is a large scatter and flushing of Niskin bottles is likely incomplete. No recalibration was applied. There was no dissolved oxygen calibration sampling, so the recalibration used for cruise 2017-01 was applied to these data since the same sensor was used and calibration sampling was extensive. For details on the processing see processing report: 2017-07-proc.doc. --------------------------------------------------------------------------------- !-1-- --2--- --3--- ---4---- ---5---- --6--- --7-- ---8--- --9-- --10-- 11 --12-- !Samp Pressu Depth Temperat Salinity Oxygen Oxyge Fluores Depth Chloro Fl Phaeo- !le_ re ure: :T0:C0 : n: cence: : phyll: ag Pigmen !Numb Primary Dissol Disso URU: Nomin Extrac ~a t: !er ved: lved: Wetlabs al ted ct Extrac ! SBE SBE ed ted !---- ------ ------ -------- -------- ------ ----- ------- ----- ------ -- ------ *END OF HEADER 19 1.1 1.1 8.0900 27.5403 7.71 336.8 3.697 0. 5.95 6 0.74 20 5.0 5.0 7.9046 29.0386 6.17 269.3 1.389 5. 2.56 46 1.07