*2021/03/12 16:15:50.68 *IOS HEADER VERSION 2.0 2016/04/28 2016/06/13 MATLAB *FILE START TIME : UTC 2019/04/05 17:55:00.313 NUMBER OF RECORDS : 85 DATA DESCRIPTION : CTD FILE TYPE : ASCII NUMBER OF CHANNELS : 8 $TABLE: CHANNELS ! No Name Units Minimum Maximum !--- ----------------------------------- ----------------- --------- ------- 1 Pressure decibar 2.2 19.0 2 Depth metres 2.2 18.8 3 Temperature 'deg C (ITS90)' -1.7502 -1.7369 4 Conductivity mS/cm 25.5228 25.5533 5 Salinity PSS-78 32.1818 32.2049 6 Fluorescensce:URU:Turner mg/m^3 -99.000 -99.000 7 Oxygen:Dissolved:Rinko mL/L -99.00 -99.00 8 Oxygen:Dissolved:Saturation:Rinko % -99.00 -99.00 $END $TABLE: CHANNEL DETAIL ! No Pad Start Width Format Type Decimal_Places !--- -------- ----- ----- ------ ---- -------------- 1 -99.0 ' ' 7 F R4 1 2 -99.0 ' ' 7 F R4 1 3 -99.0000 ' ' 9 F R4 4 4 -99.0000 ' ' 9 F R4 4 5 -99.0000 ' ' 9 F R4 4 6 -99.000 ' ' 8 F R4 3 7 -99.00 ' ' 7 F R4 2 8 -99.00 ' ' 8 F R4 2 $END *ADMINISTRATION MISSION : 2019-031 AGENCY : IOS, Ocean Sciences Division, Sidney, B.C. COUNTRY : Canada PROJECT : Canadian Ranger Ocean Watch (CROW) SCIENTIST : Dempsey M. PLATFORM : Snowmobile *LOCATION GEOGRAPHIC AREA : Canadian Arctic Archipelago STATION : CMPA1-Cst13 EVENT NUMBER : 18 LATITUDE : 69 37.72900 N ! (deg min) LONGITUDE : 124 7.78700 W ! (deg min) WATER DEPTH : 23.8 $REMARKS Water Depth is cast depth plus 5m. Standard operation is to lower the CTD full ocean depth until the weight, 5m below the CTD, touches bottom. $END *INSTRUMENT TYPE : RBR CTD MODEL : Concerto SERIAL NUMBER : 65541 $TABLE: SENSORS ! Name Serial No ! --------------------------------------------------- ---------- 'Temperature: RBR Concerto' 65541 'Conductivity: RBR Concerto' 65541 'Oxygen:JFEAdvantechRinkoIII TypeA foil' 9 'Fluorometer: Turner Design: Cyclops' 21100027 $END $REMARKS CTD configured to output percent oxygen saturation instead of volts. See COMMENTS section below for sensor configuration and calibration dates. $END *HISTORY $TABLE: PROGRAMS ! Name Vers Date Time Recs In Recs Out ! ------------------------------ ---- ---------- -------- --------- --------- PRNTIOS_FMTS_201931CROW_SINGLE 1.0 2021/03/12 16:15:51 85 85 $END $REMARKS -PRNTIOS_FMTS_201931CROW_SINGLE processing: 2021/03/12 16:15:50 $END *COMMENTS Program Summary There were multiple components to this program. Leg 1, Mike Dempsey and Chris Clarke went to Cambridge Bay and Kugluktuk, traveling from March 5th to March 16th, 2019. Leg 2 Mike Dempsey and Jane Eert went to Paulatuk from April 1 to April 10th, 2019. On these trips the participants met with Rangers for training and discussion of the program in anticipation of the Ranger’s upcoming patrol exercises. CTD casts were collected in each community. Leg3, The Kugluktuk patrol went out to Dolphin and Union Strait two months later and collected data. For more information see the cruise report: CROW 2019 Report final v2019-10-23.docx The data processing steps are discussed below. 5-11 March 2019 Cambridge Bay Stations 1 to 13 11-16 March 2019 Kugluktuk Stations 14 to 16 1-10 April 2019 Paulatuk Stations 17 to 24 7 May 2019 Kugluktuk Patrol in Dolphin and Union St. Stn 25 to 27 Paulatuk CTD Data There are 8 stations, all with 3 or more casts per station in 2 data sets: 5 Apr 2019 Paulatuk, South West Darnley Bay 6 stations 065541_20190405_2348.rsk 7 Apr 2019 Paulatuk, Darnley Bay 2 stations 065639_20190408_0132.rsk Both stations on 7 April have water samples Meta data are recorded in: CROW 2019 log_2019-10-16.xlsx Comments The first CTD used had problems with external channels and there are no good oxygen and chlorophyll data for stations 1 to 6. The next field-day used a different CTD with different external sensors. The second CTD had a few dropouts with these external channels at the start of the first cast, but as there were 3 or more casts per station, there was no problem in choosing a good cast without dropouts. Equipment RBR Concerto 65541 w/ 6Hz sampling rate Calibration Dates 12 Mar 2018, Jan2013 (new) w/ Turner Cyclops Fluorometer sensor #21100027 Fluorometer set for 0 to 5 ug/l range Calibration Dates 15 Feb 2018 (3-pt check, IOS), Feb 2017 (new) w/ JFE Advantech RINKO III Oxygen sensor #9 Type- Afoil, Reporting in % Saturation Calibration Dates 04-Apr-2019 (2pt cal, in field), 01 Jun 2009 (new) RBR Concerto 65639 w/ 6Hz sampling rate Calibration Dates 27 Mar 2018, Mar2014 (new) w/ Turner Cyclops Fluorometer sensor #21100322 Fluorometer set for 0 to 5 ug/l range Calibration Dates 15 Feb 2018 (3-pt check, IOS), May 2017 (new) w/ JFE Advantech RINKO III Oxygen sensor #259 Type-B foil, Reporting in Volts Calibration Dates 1 Mar 2018 (2pt cal, IOS), 24 May 2016 (new), 09 Apr 2019 (2pt-cal, field) confirmed the current values were good w/in 2% Air thermometer SN Ice Auger# SN Downrigger# SN Kit # SN Data Collection Method Follow protocol laid out in Ranger science manual ver7 2015.doc Changes to protocol: Added water sample collection by hanging one Niskin on the line and closing with a messenger. Performed 3 casts per station instead of 2. Processing 2021-03-11 Update The problem with the Ruskin software does not affect these data and no re-processing was needed. Calibration issues RINKO III SN9 had a 2-pt oxygen calibration done in Paulatuk prior to data collection. New G and H terms are: -3.530317,1.032586 (RSK terms C0 and C1) However, there was some failure with this system and no oxygen data were collected. RINKO III SN259 also had a 2-pt oxygen calibration the day after it was used for data collection. The calibration agreed within 1 to 2% of the prior (1 Mar 2018) calibration so no changes were made. Casts Using Matlab, the time v. pressure data were plotted and each direction of each cast was separated and given a cast number. For each station, the best cast was kept which was typically the last downcast (i.e. the third) List of Stations Station Name Cast Number Used File Name 17 CMPA2 3 (2nd downcast) 065541_20190405_2348 18 CMPA1 13 (3rd downcast) 065541_20190405_2348 19 CMPA4 19 (3rd downcast) 065541_20190405_2348 20 CMPA3 25 (3rd downcast) 065541_20190405_2348 21 CMPA5 29 (2nd downcast) 065541_20190405_2348 22 CMPA6 39 (3rd downcast) 065541_20190405_2348 23 BPT_01 9 (4th downcast) 065639_20190408_0132 24 BPT_HC2 21 (3rd downcast) 065639_20190408_0132 Pressure The top 2m of data were removed from all casts. The top 2 m are influenced by proximity to the edge of the drilled ice-hole with the mix of water and ice slush. This water mix can create falsely fresh water, also cooling during the cast can freeze surface water and reject brine creating density inversions along the TS freezing line. The bottom 0.2m were removed due to poor data resulting from change of flow rate. Temperature shift and new Salinity a) Applied 3 scan shift to advance temperature after confirming it was better than 2 scans. b) Smoothed temperature and conductivity conductivity using a low pass filter (pl66) with a half amplitude period of 6 scans to recalculate new salinity. The conductivity smoothing was only applied after first 30 scans to prevent overshooting from possible large surface salinity gradients. Fluorometer Missing for first 6 stations due to CTD problems. For the last two stations, processed using a low pass filter (pl66) with a half amplitude period of 10 scans. Oxygen (RINKO) Missing for first 6 stations due to CTD problems. For the last two stations: The RBR CTD was configured to output volts. The data were advanced by 3 seconds (18 scans). This is roughly a 1.5m offset at a typical lowering (and raising) speed of 0.5m/sec. This brings the oxygen data in line with temperature. Factory coefficients A through F and the two determined from the 2-pt calibrations, coefficients G and H, were used to calculate oxygen saturation using RINKO's provided script for Type-B foil sensors. Oxygen concentration [mL/L] was calculated as full saturation concentration multiplied by percent saturation ( DO [ml/l] = DO at full saturation [ml/l] * %sat). DO at full saturation was calculated using Garcia and Gordon (1992,1993) Eq.8 using coeefficients in column 1 from Table 1 (fit to Benson and Krause (1984) data) and in situ temperature. The final data set has the adjusted oxygen saturation and oxygen concentration [mL/L]. REFERENCES: Benson, B.B., and D. Krause, 1984: The concentration and isotopic fractionation of oxygen dissolved in freshwater and seawater in equilibrium with the atmosphere. Limnology and Oceanography, 29, 620-632. Garcia, H.E., and L.I. Gordon, 1992: Oxygen solubility in seawater: Better fitting equations. Limnology and Oceanography, 37, 1307-1312. Garcia, H.E., and L.I. Gordon, 1993: Erratum: Oxygen solubility in seawater: better fitting equations. Limnology and Oceanography, 38, 656. Removed all pressure reversals Interpolated to 0.2db bins. Special edits: Station Edit NA NA Saved this cleaned dataset to a matlab *.mat files and an ODV *.o4x file 2019-31_CROW_Paulatuk1_cleandowncasts.mat 2019-31_CROW Paulatuk2_cleandowncasts.mat data_from_2019-31_CROW_Paulatuk1.txt data_from_2019-31_CROW_Paulatuk2.txt Used script file p_RBR_CROW_2019_Paul1.m for processing. Stations 1 to 6 Used script file p_RBR_CROW_2019_Paul2.m for processing. Stations 7 to 8 These both call p_RBR_generic_2019.m that uses ‘readtable’ to import data. !--1--- --2--- ---3---- ---4---- ---5---- ---6--- ---7-- ---8--- !Pressu Depth Temperat Conducti Salinity Fluores Oxygen Oxygen: !re ure ity cence: : Dissolv ! URU: Dissol ed: ! Turner ed: Saturat ! Rinko ion: ! Rinko !------ ------ -------- -------- -------- ------- ------ ------- *END OF HEADER 2.2 2.2 -1.7502 25.5230 32.1837 -99.000 -99.00 -99.00 2.4 2.4 -1.7500 25.5231 32.1836 -99.000 -99.00 -99.00 2.6 2.6 -1.7500 25.5233 32.1836 -99.000 -99.00 -99.00 2.8 2.8 -1.7499 25.5237 32.1840 -99.000 -99.00 -99.00 3.0 3.0 -1.7495 25.5228 32.1822 -99.000 -99.00 -99.00 3.2 3.2 -1.7491 25.5229 32.1819 -99.000 -99.00 -99.00 3.4 3.4 -1.7491 25.5233 32.1824 -99.000 -99.00 -99.00 3.6 3.6 -1.7493 25.5241 32.1834 -99.000 -99.00 -99.00 3.8 3.8 -1.7495 25.5235 32.1824 -99.000 -99.00 -99.00 4.0 4.0 -1.7491 25.5242 32.1832 -99.000 -99.00 -99.00 4.2 4.2 -1.7489 25.5233 32.1818 -99.000 -99.00 -99.00 4.4 4.4 -1.7493 25.5239 32.1826 -99.000 -99.00 -99.00 4.6 4.6 -1.7495 25.5243 32.1831 -99.000 -99.00 -99.00 4.8 4.8 -1.7492 25.5246 32.1834 -99.000 -99.00 -99.00 5.0 4.9 -1.7492 25.5249 32.1838 -99.000 -99.00 -99.00 5.2 5.1 -1.7497 25.5245 32.1830 -99.000 -99.00 -99.00 5.4 5.3 -1.7493 25.5239 32.1821 -99.000 -99.00 -99.00 5.6 5.5 -1.7490 25.5240 32.1820 -99.000 -99.00 -99.00 5.8 5.7 -1.7491 25.5246 32.1827 -99.000 -99.00 -99.00 6.0 5.9 -1.7493 25.5244 32.1822 -99.000 -99.00 -99.00 6.2 6.1 -1.7491 25.5243 32.1820 -99.000 -99.00 -99.00 6.4 6.3 -1.7492 25.5254 32.1835 -99.000 -99.00 -99.00 6.6 6.5 -1.7493 25.5250 32.1827 -99.000 -99.00 -99.00 6.8 6.7 -1.7491 25.5256 32.1833 -99.000 -99.00 -99.00 7.0 6.9 -1.7489 25.5264 32.1842 -99.000 -99.00 -99.00 7.2 7.1 -1.7489 25.5265 32.1840 -99.000 -99.00 -99.00 7.4 7.3 -1.7484 25.5271 32.1838 -99.000 -99.00 -99.00 7.6 7.5 -1.7481 25.5261 32.1834 -99.000 -99.00 -99.00 7.8 7.7 -1.7482 25.5271 32.1831 -99.000 -99.00 -99.00 8.0 7.9 -1.7482 25.5270 32.1833 -99.000 -99.00 -99.00 8.2 8.1 -1.7478 25.5274 32.1840 -99.000 -99.00 -99.00 8.4 8.3 -1.7474 25.5283 32.1848 -99.000 -99.00 -99.00 8.6 8.5 -1.7474 25.5299 32.1855 -99.000 -99.00 -99.00 8.8 8.7 -1.7473 25.5298 32.1858 -99.000 -99.00 -99.00 9.0 8.9 -1.7472 25.5296 32.1856 -99.000 -99.00 -99.00 9.2 9.1 -1.7470 25.5295 32.1854 -99.000 -99.00 -99.00 9.4 9.3 -1.7460 25.5302 32.1854 -99.000 -99.00 -99.00 9.6 9.5 -1.7452 25.5317 32.1854 -99.000 -99.00 -99.00 9.8 9.7 -1.7450 25.5320 32.1850 -99.000 -99.00 -99.00 10.0 9.9 -1.7444 25.5314 32.1843 -99.000 -99.00 -99.00 10.2 10.1 -1.7423 25.5330 32.1836 -99.000 -99.00 -99.00 10.4 10.3 -1.7405 25.5325 32.1836 -99.000 -99.00 -99.00 10.6 10.5 -1.7392 25.5370 32.1845 -99.000 -99.00 -99.00 10.8 10.7 -1.7378 25.5384 32.1861 -99.000 -99.00 -99.00 11.0 10.9 -1.7369 25.5404 32.1881 -99.000 -99.00 -99.00 11.2 11.1 -1.7378 25.5405 32.1897 -99.000 -99.00 -99.00 11.4 11.3 -1.7400 25.5398 32.1906 -99.000 -99.00 -99.00 11.6 11.5 -1.7456 25.5374 32.1911 -99.000 -99.00 -99.00 11.8 11.7 -1.7472 25.5343 32.1913 -99.000 -99.00 -99.00 12.0 11.9 -1.7473 25.5351 32.1915 -99.000 -99.00 -99.00 12.2 12.1 -1.7472 25.5355 32.1919 -99.000 -99.00 -99.00 12.4 12.3 -1.7470 25.5371 32.1928 -99.000 -99.00 -99.00 12.6 12.5 -1.7465 25.5377 32.1939 -99.000 -99.00 -99.00 12.8 12.7 -1.7465 25.5386 32.1948 -99.000 -99.00 -99.00 13.0 12.9 -1.7471 25.5387 32.1959 -99.000 -99.00 -99.00 13.2 13.1 -1.7474 25.5397 32.1968 -99.000 -99.00 -99.00 13.4 13.3 -1.7472 25.5403 32.1975 -99.000 -99.00 -99.00 13.6 13.5 -1.7474 25.5404 32.1978 -99.000 -99.00 -99.00 13.8 13.7 -1.7479 25.5403 32.1980 -99.000 -99.00 -99.00 14.0 13.9 -1.7478 25.5403 32.1980 -99.000 -99.00 -99.00 14.2 14.1 -1.7480 25.5403 32.1979 -99.000 -99.00 -99.00 14.4 14.3 -1.7478 25.5406 32.1978 -99.000 -99.00 -99.00 14.6 14.5 -1.7479 25.5406 32.1977 -99.000 -99.00 -99.00 14.8 14.7 -1.7479 25.5405 32.1978 -99.000 -99.00 -99.00 15.0 14.8 -1.7478 25.5406 32.1978 -99.000 -99.00 -99.00 15.2 15.0 -1.7480 25.5410 32.1979 -99.000 -99.00 -99.00 15.4 15.2 -1.7482 25.5406 32.1978 -99.000 -99.00 -99.00 15.6 15.4 -1.7479 25.5406 32.1973 -99.000 -99.00 -99.00 15.8 15.6 -1.7476 25.5406 32.1972 -99.000 -99.00 -99.00 16.0 15.8 -1.7471 25.5415 32.1979 -99.000 -99.00 -99.00 16.2 16.0 -1.7467 25.5422 32.1989 -99.000 -99.00 -99.00 16.4 16.2 -1.7465 25.5442 32.1993 -99.000 -99.00 -99.00 16.6 16.4 -1.7461 25.5446 32.1988 -99.000 -99.00 -99.00 16.8 16.6 -1.7444 25.5445 32.1981 -99.000 -99.00 -99.00 17.0 16.8 -1.7424 25.5448 32.1985 -99.000 -99.00 -99.00 17.2 17.0 -1.7413 25.5477 32.2007 -99.000 -99.00 -99.00 17.4 17.2 -1.7410 25.5533 32.2038 -99.000 -99.00 -99.00 17.6 17.4 -1.7425 25.5522 32.2049 -99.000 -99.00 -99.00 17.8 17.6 -1.7422 25.5486 32.2038 -99.000 -99.00 -99.00 18.0 17.8 -1.7435 25.5482 32.2022 -99.000 -99.00 -99.00 18.2 18.0 -1.7437 25.5491 32.2017 -99.000 -99.00 -99.00 18.4 18.2 -1.7434 25.5490 32.2022 -99.000 -99.00 -99.00 18.6 18.4 -1.7434 25.5487 32.2030 -99.000 -99.00 -99.00 18.8 18.6 -1.7439 25.5503 32.2038 -99.000 -99.00 -99.00 19.0 18.8 -1.7436 25.5498 32.2044 -99.000 -99.00 -99.00