*2019/04/25 08:14:34.76 *IOS HEADER VERSION 2.0 2016/04/28 2016/06/13 IVF16 *FILE START TIME : UTC 2018/07/18 16:53:00.000 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 104 104 2 Pressure decibar 3.7 3.7 3 Depth metres 3.7 3.7 4 Temperature:Primary 'deg C (ITS90)' 14.715 14.715 5 Salinity:T0:C0 PSS-78 31.1918 31.1918 6 Oxygen:Dissolved:SBE mL/L 7.19 7.19 7 Oxygen:Dissolved:SBE umol/kg 313.6 313.6 8 Fluorescence:URU:Wetlabs mg/m^3 0.99 0.99 9 pH:SBE:Nominal n/a 9.199 9.199 10 Conductivity:Primary S/m 3.845666 3.845666 11 Salinity:Bottle PSS-78 31.1808 31.1808 12 Flag:Salinity:Bottle ' ' 13 Chlorophyll:Extracted mg/m^3 2.55 2.55 14 Flag:Chlorophyll:Extracted ' ' 15 Phaeo-Pigment:Extracted mg/m^3 0.87 0.87 16 Nitrate_plus_Nitrite umol/L 0 0 17 Flag:Nitrate_plus_Nitrite ' ' 18 Silicate umol/L 10.39 10.39 19 Flag:Silicate ' ' 20 Phosphate umol/L 0.164 0.164 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 ' ' 7 F R4 2 7 -99 ' ' 6 F R4 1 8 -99 ' ' 8 F R4 3 9 -99 ' ' ' ' F8.3 R4 ' ' 10 -99 ' ' ' ' F10.6 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 ' ' 7 F R4 2 17 ' ' ' ' 3 NQ C ' ' 18 -99 ' ' 7 F R4 2 19 ' ' ' ' 3 NQ C ' ' 20 -99 ' ' 8 F R4 3 21 ' ' ' ' 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 : 2018-073 AGENCY : PBS, Ecosystem Sciences Division, Nanaimo, B.C. COUNTRY : Canada PROJECT : Intergrated Pelagics Ecosystem Survey SCIENTIST : King J. / Boldt J. PLATFORM : Nordic Pearl *LOCATION GEOGRAPHIC AREA : North & West Coast Vancouver Island STATION : 3698 EVENT NUMBER : 104 LATITUDE : 48 52.29000 N ! (deg min) LONGITUDE : 126 16.14420 W ! (deg min) WATER DEPTH : 140 *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 2019/04/25 08:10:59 1 1 CLEAN 5.2.3 2019/04/25 08:11:34 1 1 REMOVECH 8.2 2019/04/25 08:14:27 1 1 HDREDIT2 3.1.1 2019/04/25 08:14:34 ? ? $END $REMARKS -CLEAN functions: 2019/04/25 08:11:32 20 Reset #RECS, MIN & MAX values in header. Change character data from " " to "0" in channels Flag:* Set header Start and End times from the data. -REMOVECH 2019/04/25 08:14:27 The following CHANNEL(S) were removed: Date TIME:UTC Latitude [degrees] Longitude [degrees] -HEADER EDITS: 2019/04/25 08:14:34 Applied edit header: P:\Cruise_Data_Processing\2018-073\Processing\doc\HYDRO\2018-073-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 Channel 8: 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 ~28 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 0.43 to 31.49ug/l in 50 samples. Average %CV for this cruise was 5.74 with 9 out of 46 duplicate pairs having a CV>10% and 0 duplicate pairs having a CV>30%. Our average dataset %CV is 3.73% for 2013-2017 so the overall quality of this dataset is acceptable. For details see worksheet “CV%” in file 2018-73 CHL QF*.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 27 to 48 days days after collection. For details, see document QF2018-73SAL*.xls. Nutrient samples were collected in plastic tubes and quick frozen in aluminum blocks stored in -20 freezer. All samples were returned to IOS for analysis. They were analyzed using an Astoria analyzer following methods described in IOS Nutrient Methods (1996) Barwell-Clarke and Whitney. For details including a duplicate analysis, see document NUTS QF2018-73*.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 CTD was stopped during the upcast when the Niskin bottle was at about 4db below the surface. The CTD data were selected from the downcast as the quality of those data were higher, except for cast #2 for which data are from the upcast. For cast #152 data were not available from 4db, so 5db data were used. There are no CTD data available for cast #167. Conductivity, Fluorescence:URU:Wetlabs and pH:SBE data are nominal and unedited except that some records were removed in editing temperature and salinity. All salinity sampling from this cruise came from near the surface, where vertical salinity gradients and lcoal variability are expected to be high. As a result there is a high standard deviation in the differences between CTD and bottle salinity. Comparisons with both downcast and upcast CTD salinity suggest that the CTD is within 0.005psu of bottles, but the standard deviations in the comparisons are very high. Previous cruises had limited sampling but also suggested that CTD salinity was within 0.005psu. There was no dissolved oxygen sampling during this cruise and all other cruises using this equipment since it was last serviced. There was an inter-ship comparison in June 2017 for 1 cast only that 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 was limited to the top 50m but suggested that dissolved oxygen was reading 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. It is recommended that extracted chlorohpyll values be used where available. For details on the processing see document: 2018-073_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 Oxygen Oxyge Fluores pH:SBE: Conductiv Salinity Fl Chloro Fl Phaeo- Nitrat Fl Silica Fl Phospha Fl !le_ re ure: :T0:C0 : n: cence: Nominal ity: :Bottle ag phyll: ag Pigmen e_ ag te ag te ag !Numb Primary Dissol Disso URU: Primary ~o Extrac ~a t: plus_ ~t ~i ~p !er ved: lved: Wetlabs tt ted ct Extrac Nitrit ri ca ha ! SBE SBE le ed ted e te te te !---- ------ ------ -------- -------- ------ ----- ------- ------- --------- -------- -- ------ -- ------ ------ -- ------ -- ------- -- *END OF HEADER 104 3.7 3.7 14.7150 31.1918 7.19 313.6 0.990 9.199 3.845666 31.1808 0 2.55 6 0.87 0.00 6 10.39 6 0.164 6