*2021/12/20 16:43:42.75 *IOS HEADER VERSION 2.0 2016/04/28 2016/06/13 IVF16 *FILE START TIME : UTC 2000/09/09 16:00:00.000 END TIME : UTC 2000/09/10 21:00:00.000 TIME ZERO : UTC 1980/01/01 00:00:00.000 NUMBER OF RECORDS : 12 DATA DESCRIPTION : Bottle:Rosette:Up:Stop + CTD:Up FILE TYPE : ASCII NUMBER OF CHANNELS : 13 $TABLE: CHANNELS ! No Name Units Minimum Maximum !--- ---------------------------------- -------- -------------- -------------- 1 Date n/a 7557 7558 2 Time n/a 0.1770833 0.8847222 3 Sample_Order n/a 19 30 4 Sampler_Type n/a 5 Sampler_ID_Number n/a 6 Sample_Number n/a 22 33 7 Depth metres 0 990 8 Iron:Filtered:Buffered:0.22 nmol/L 0.1E-01 0.54 9 Flag:Iron:Filtered:Buffered:0.22 n/a 10 Iron:Unfiltered:Buffered nmol/L 0.2E-01 0.73 11 Flag:Iron:Unfiltered:Buffered n/a 12 Salinity:Bottle PSS-78 32.7127 34.3734 13 Flag:Salinity:Bottle n/a $END $TABLE: CHANNEL DETAIL ! No Pad Start Width Format Type Decimal_Places !--- ---- ----- ----- ---------- ---- -------------- 1 -99 ' ' ' ' YYYY/MM/DD D ' ' 2 -99 ' ' ' ' HH:MM:SS T ' ' 3 -99 ' ' ' ' I4 I ' ' 4 ' ' ' ' 8 ' ' C ' ' 5 ' ' ' ' 8 ' ' C ' ' 6 -99 ' ' ' ' I4 I ' ' 7 -99 ' ' ' ' F7.1 R4 ' ' 8 -99 ' ' ' ' F7.2 R4 ' ' 9 ' ' ' ' 3 NQ C ' ' 10 -99 ' ' ' ' F7.2 R4 ' ' 11 ' ' ' ' 3 NQ C ' ' 12 -99 ' ' ' ' F9.4 R4 ' ' 13 ' ' ' ' 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 : 2000-25 AGENCY : IOS, Ocean Science and Productivity, Sidney, B.C. COUNTRY : Canada PROJECT : Line P, Eddies SCIENTIST : Freeland H. PLATFORM : John P. Tully *LOCATION STATION : P16 EVENT NUMBER : 8003 LATITUDE : 49 17.00000 N ! (deg min) LONGITUDE : 134 40.00000 W ! (deg min) *INSTRUMENT TYPE : Bottle MODEL : Sampler_Type LOCATION : Mid-ship ! custom item *HISTORY $TABLE: PROGRAMS ! Name Vers Date Time Recs In Recs Out ! ------------ ------ ---------- -------- --------- --------- SPRD2IS 4.9 2013/02/12 16:31:52 12 12 HDREDIT2 2.6 2013/02/12 16:33:09 ? ? SORT 3.6 2013/02/12 16:33:59 12 12 CLEAN 5.1 2013/02/12 16:34:06 12 12 SORT 3.6 2013/02/12 16:34:23 12 12 CHANGE_FLAGS 2.0 2014/11/20 09:52:56 12 12 HDREDIT2 3.2 2021/12/20 16:40:43 ? ? ADTIMCH 4.4 2021/12/20 16:43:05 12 12 REMOVECH 8.2 2021/12/20 16:43:42 12 12 $END $REMARKS -HEADER EDITS: 2013/02/12 16:33:09 Applied edit header: O:\Data Processing\Header Comments\Work\2000-25-Iron.txt -SORT parameters: 2013/02/12 16:33:59 Sorted in ascending order of channel Date_Time -CLEAN functions: 2013/02/12 16:34:06 20 Reset #RECS, MIN & MAX values in header. Delete Empty Channels: 0 deleted. Set header Start and End times from the data. -SORT parameters: 2013/02/12 16:34:23 Sorted in ascending order of channel Depth -HEADER EDITS: 2021/12/20 16:40:43 Applied edit header: D:\Telework\2021-008\Processing\doc\HYDRO\2021-008-bot-hdr.txt -The following ADTIMCH parameters were used. Add IOS header Time/Date channels -REMOVECH 2021/12/20 16:43:42 The following CHANNEL(S) were removed: Date_Time [YYYY/MM/DD HH:MM] $END *COMMENTS Sample_Number 22: //filtered in CR Sample_Number 23: ~15' wire angle Sample_Number 28: ~30' wire angle For Collection and Analysis Methods, and Explanation of Abbreviations please see the Metadata Sheet in the Iron Spreadsheet file located in the Cruise .DOC directory. Analysis methods: ----------------- Chlorophyll samples were filtered onto 25mm GF/F filters and stored in glass scintillation vials at -80C 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 to 5 weeks after the cruise. Variability is assessed as the CV% (std dev / mean*100). Flags and comments apply to chlorophyll values only. Chlorophyll values ranged from 0.05-20.68 ug/l in 103 samples. Average %CV for this cruise was 5.86% (after one duplicate was rejected, original 8.25%) with 5 out of 23 duplicate pairs having a CV>10% and 0 duplicate pairs having a CV>30%. Our average dataset %CV is 3.83% for 2013 - 2020 so the overall quality of this dataset is acceptable. For details see worksheet “CV%” in file QF2021-008_CHL*.xlsx. Oxygen samples were analyzed at sea using an automated Winkler titration System (Metrohm Dosimat model 876 and a UV light source and detector with a 365nm filter controlled by LV02_876 software designed and constructed by Scripps Institution of Oceanography) with modifications based on Carpenter (1965) and adhering to WOCE protocols (Culberson 1991). For details including a duplicate analysis, see document QF2021-008OXY*.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 on a Guildline 8400B Salinometer standardized with IAPSO standard seawater 68 - 75 days after collection. For details including a duplicate analysis, see document QF2021-008SAL*.xlsx. Nutrient samples were collected in plastic tubes and quick frozen in aluminum blocks stored in a -20C freezer. For samples 400m and deeper a second set of samples are collected and stored cool for silicate analysis. All samples were returned to the Insitute of Ocean Sciences and they were analyzed using an Astoria-Pacific Analyzer following methods described in IOS Nutrient Methods (1996) Barwell-Clarke and Whitney. For details including a duplicate analysis, see document QF2021-008nuts*.xlsx. DMS samples were collected in 250mL ground glass stoppered bottles and stored in a fridge, in the dark and removed one at a time before analysis. A sample was loaded onto the stripper and purged with UHP Nitrogen for 10 minutes at ~100mL/min. The DMS was extracted from the water and absorbed into a Tenax TA trap kept at -80C. The trap was subsequently desorbed at 100 deg C (with a dewar containing boiling water) onto a Chromosil 330 column which eluted onto a Flame Photometric Detector (FPD). All samples were run as soon as possible after being collected. The minimum detectable level for DMS is 0.10 nmol/L, so “0” values should be interpreted as <0.1nmol/L. DMS data are limited to 2 significant figures. Unless otherwise indicated the % relative difference between duplicates is <20%. For more detail see file "2021-008 DMS report*.doc" and for data and duplicate analysis see "QF2021-008_DMS_summary*.xls." DMSP-D: Approximately 50-100mL of seawater is drained from the niskin into a magnetic filtration funnel containing a 0.7um GF/F filter. The first 3.5mL is collected in a polypropylene tube containing 50uL of a 50% sulphuric acid solution. A new funnel and filter are used for each sample. DMSP-T: 3.5mL of seawater was collected directly from the Niskin into a polypropylene tube (15mL) containing 50uL of a 50% sulphuric acid solution. DMSP-D and DMSP-T: Samples are stored in the dark at 4 degrees C for a minimum of 24 hours. They are hydrolized and analyzed at the Institute of Ocean Sciences when time permits. The minimum detectable level is 0.1 nM, so “0” values should be interpreted as <0.1 nM. DMSP data are limited to 2 significant figures. Unless otherwise indicated the % relative difference between duplicates is <20%. For details on analysis and raw data, see document "QF2021-008_dmsp_summary*.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. Carpenter, J.H. 1965. The Chesapeake Bay Institute Technique for the Winkler Dissolved Oxygen Method. Limmnol. & Oceanogr., 10: 141-143. 3. Culberson, C.H. 1991. Dissolved oxygen. WOCE Hydrographic Programme Operations and Methods (July 1991). 15pp. 4. 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: -------------------------- Conductivity, Transmissivity, Fluorescence:URU:Seapoint and PAR data are nominal and unedited except that some records were removed in editing temperature and salinity. There were 2 WetLabs CStar transmissometers in use during this cruise: Channel Transmissometer refers to sensor #1185DR (650nm - red) Channel Transmissometer:Green refers to sensor #1883DG (530nm - green) For comparison with other Institute of Ocean Sciences cruises, note that the transmissometer wavelength is 650nm unless otherwise stated. NOTE: 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 recommended that users check extracted chlorophyll values where available. Both salinity channels were found to be reading much lower relative to bottle samples than in 3 previous cruises using the same equipment, and a little lower than during the cruise that followed. Channel Salinity:T1:C1 was found to be lower than bottles by an average of 0.0055psu in deep water. Since delayed analysis and small errors due to incomplete flushing both would have led to bottle values being too high, no recalibration was applied to the CTD salinity. While confidence in the bottle comparison is lower than usual, it is likely that channel Salinity:T1:C1 is within ±0.003psu. The dissolved oxygen sensor was mounted on the primary pump and all primary channels produced bad data for cast #37. The system returned to reasonable values by the end of the cast, but there was some evidence of drift in primary temperature and salinity thereafter. The dissolved oxgyen data looked ok in the comparison with bottles except for cast #37. Dissolved oxygen was removed from file 2021-008-0037.che. For details on the processing see the report: 2021-008_Processing_Report.doc. --------------------------------------------------------------------------------- !----1----- ---2---- -3- ---4--- ---5--- -6- --7--- --8--- 9- --10-- 11 ---12--- 13 ! Date Time Sam Sampler Sampler Sam Depth Iron: Fl Iron: Fl Salinity Fl ! ple _Type _ID_ ple Filter ag Unfilt ag :Bottle ag ! _ Number _ ed:Buf ~: ered: ~f ~o ! Ord Num fered: 0. Buffer er tt ! er ber 0.22 22 ed ed le !---------- -------- --- ------- ------- --- ------ ------ -- ------ -- -------- -- *END OF HEADER 2000/09/09 16:00:00 19 Zodiac Dip 22 0.0 0.01 0 0.02 0 -99.0000 0 2000/09/10 08:25:00 29 Pump Asti 32 10.0 0.01 0 0.05 0 -99.0000 0 2000/09/10 08:00:00 29 Pump Asti 31 25.0 0.01 0 0.02 0 -99.0000 0 2000/09/10 07:45:00 29 Pump Asti 30 40.0 0.01 0 0.02 0 -99.0000 0 2000/09/10 05:46:00 25 GF30 Wilbur 28 75.0 0.02 0 0.05 0 32.7127 0 2000/09/10 05:30:00 24 GF30 Wilbur 27 100.0 0.06 0 0.12 0 33.1008 0 2000/09/10 05:00:00 23 GF30 Wilbur 26 200.0 0.22 0 0.26 0 33.9169 0 2000/09/10 04:15:00 22 GF30 Wilbur 25 300.0 0.36 0 0.42 0 33.9497 0 2000/09/09 21:14:00 21 GF30 Wilbur 24 400.0 0.54 0 0.73 0 34.0369 0 2000/09/09 19:31:00 20 GF30 Wilbur 23 600.0 0.46 0 0.61 0 34.1687 0 2000/09/10 06:30:00 26 GF30 Wilbur 28 800.0 0.52 0 0.54 0 34.2740 0 2000/09/10 21:00:00 30 GF30 Wilbur 33 990.0 0.47 0 0.60 0 34.3734 0