*2017/12/01 12:09:44.35 *IOS HEADER VERSION 2.0 2016/04/28 2016/06/13 IVF16 *FILE START TIME : UTC 2017/07/13 15:25:00.000 NUMBER OF RECORDS : 2 DATA DESCRIPTION : Bottle:Wire + CTD:Down FILE TYPE : ASCII NUMBER OF CHANNELS : 5 $TABLE: CHANNELS ! No Name Units Minimum Maximum !--- ---------------------------- -------- -------------- -------------- 1 Sample_Number n/a 4 5 2 Depth:Nominal metres 0 5 3 Chlorophyll:Extracted mg/m^3 0.3 0.59 4 Flag:Chlorophyll:Extracted ' ' 5 Phaeo-Pigment:Extracted mg/m^3 0.23 0.29 $END $TABLE: CHANNEL DETAIL ! No Pad Start Width Format Type Decimal_Places !--- ---- ----- ----- ------ ---- -------------- 1 -99 ' ' ' ' I5 I ' ' 2 -99 ' ' 5 F R4 0 3 -99 ' ' ' ' F7.2 R4 ' ' 4 ' ' ' ' 3 NQ C ' ' 5 -99 ' ' ' ' F7.2 R4 ' ' $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 : 2017-49 AGENCY : IOS, Ocean Sciences Division, Sidney, B.C. PROJECT : Strait of Georgia Zooplankton SCIENTIST : Young K. PLATFORM : Neocaligus *LOCATION STATION : Halibut Bank EVENT NUMBER : 4 LATITUDE : 49 20.45000 N ! (deg min) LONGITUDE : 124 44.05000 W ! (deg min) WATER DEPTH : 50 *INSTRUMENT TYPE : Sea-Bird CTD MODEL : SBE25plus SERIAL NUMBER : 1123 *HISTORY $TABLE: PROGRAMS ! Name Vers Date Time Recs In Recs Out ! -------- ------ ---------- -------- --------- --------- SPRD2IS 5.1 2017/12/01 12:03:06 2 2 CLEAN 5.2.2 2017/12/01 12:06:54 2 2 REMOVECH 8.2 2017/12/01 12:07:10 2 2 HDREDIT2 3.1.1 2017/12/01 12:09:44 ? ? $END $REMARKS -CLEAN functions: 2017/12/01 12:06:54 20 Reset #RECS, MIN & MAX values in header. Change character data from " " to "0" in channels Flag:* Delete Empty Channels: 9 deleted. Set event to last 4 characters of file name Set header Start and End times from the data. -REMOVECH 2017/12/01 12:07:10 The following CHANNEL(S) were removed: Date TIME:UTC -HEADER EDITS: 2017/12/01 12:09:44 Applied edit header: P:\Cruise_Data_Processing\2017-49\Processing\doc\HYDRO\2017-49-bot-hdr.txt Channel 2: Depth:Nominal [metres] Format: F6.0 ==> F5.0 Pad: 99 ==> -99 $END *COMMENTS Sample_Number 4: CHL: %CV>10 Salinity samples were gathered at the bottom of CTD casts using a Niskin bottle attached about 1m above the CTD. Extracted chlorophyll samples were taken immediately after the 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 within ~9 weeks 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 0.30-3.94 ug/l. Average %CV for this cruise was 11.83% with 5 out of 9 duplicate pairs having a CV>10% and 0 out of 9 duplicate pairs having a CV>30%. Our average dataset %CV is 2.83% for 2013 - 2015 so the overall quality of this dataset is poor. HOwever, these samples are syringe filtered and expected to exhibit higher variability than samples taken using usual methodologies. For details see worksheet “CV%” in file QF2017-49CHL*.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 within 14 to 16 days after collection. For details see documents QF2017-49SAL*.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: -------------------------- There was no CTD cast at Halibut Bank - event #4. For details on the processing see processing report: 2017-49-Processing_Report.doc. --------------------------------------------------------------------------------- !-1-- -2-- --3--- 4- --5--- !Samp Dept Chloro Fl Phaeo- !le_ h: phyll: ag Pigmen !Numb Nomi Extrac ~a t: !er nal ted ct Extrac ! ed ted !---- ---- ------ -- ------ *END OF HEADER 4 0. 0.30 36 0.23 5 5. 0.59 6 0.29