*2021/03/12 16:15:48.49 *IOS HEADER VERSION 2.0 2016/04/28 2016/06/13 MATLAB *FILE START TIME : UTC 2019/03/13 17:16:14.058 NUMBER OF RECORDS : 168 DATA DESCRIPTION : CTD FILE TYPE : ASCII NUMBER OF CHANNELS : 8 $TABLE: CHANNELS ! No Name Units Minimum Maximum !--- ----------------------------------- ----------------- --------- ------- 1 Pressure decibar 2.0 35.4 2 Depth metres 2.0 35.0 3 Temperature 'deg C (ITS90)' -1.3487 -0.0138 4 Conductivity mS/cm 0.0538 23.2542 5 Salinity PSS-78 0.0440 27.8904 6 Fluorescensce:URU:Turner mg/m^3 0.197 0.379 7 Oxygen:Dissolved:Rinko mL/L 7.60 9.17 8 Oxygen:Dissolved:Saturation:Rinko % 86.89 92.78 $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 : KUG-1-Cst5 EVENT NUMBER : 14 LATITUDE : 67 51.07100 N ! (deg min) LONGITUDE : 115 7.69300 W ! (deg min) WATER DEPTH : 40.0 $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 : 65579 $TABLE: SENSORS ! Name Serial No ! --------------------------------------------------- ---------- 'Temperature: RBR Concerto' 65579 'Conductivity: RBR Concerto' 65579 'Oxygen:JFEAdvantechRinkoIII TypeB foil' 323 'Fluorometer: Turner Design: Cyclops' 2102820 $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 16:15:49 168 168 $END $REMARKS -PRNTIOS_FMTS_201931CROW_SINGLE processing: 2021/03/12 16:15:48 $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 Kugluktuk CTD Data There are 3 stations in 1 data set: 13 Mar 2019 Kugluktuk Bay 3 stations 065579_20190313_2052.rsk Meta data are recorded in: CROW 2019 log_2019-10-16.xlsx Comments It looks like the sensor may have frozen at the surface before each downcast. The CTD may be freezing a film of fresh water over the sensors as it is measuring the surface 2 to 3 m of fresh water. Equipment RBR Concerto 65579 w/ 6Hz sampling rate Calibration Dates 02 May 2016 (RBR), May 2013 (new) w/ Turner Cyclops Fluorometer sensor #2102820 Fluorometer set for 0 to 5 ug/l range Calibration Dates 15 Feb 2018 (3pt check), Jan 2012 (new) w/ JFE Advantech RINKO III Oxygen sensor #323 Type-B foil, Reporting in % Saturation Calibration Dates 1-Mar-2018 (2pt cal, at IOS), 10 Aug 2017 (new) Air thermometer Ice Auger Downrigger #8 Kit #1 Data Collection Method Follow protocol laid out in Ranger science manual ver7 2015.doc Changes to protocol: Change from 2 to 3 casts for each station. Processing 2021-03-11 Update RBR identified and fixed the problem in Ruskin that was calculating oxygen saturation using the fixed temperature when the CTD was turned on, not the real-time temperature. The original *.RSK files were corrected using Ruskin 2.10.202005061945 to update the oxygen saturation value and then exported to *.TXT for further processing. In Ruskin: 1. Changed Calibration, 5: Dissolved O2 Saturation term C0 and C1 terms to coeffiecints from 1 Mar 2018 calibration. 2. Corrected Calibration, 5: Dissolved O2 Saturation X6 and X7 terms to 4.166 and 0 3. Clicked “Store and recompute data” 4. Export > Txt.zip Note the *.RSK is now changed as well. In MATLAB, existing station scan number list from original processing was used to re-create the rough mat file and then the cleaned mat files. From here the processing step to export single *.CTD files in IOS header format w/ added note in the header was redone. To confirm the correction dealt with the X6 and X7 terms correctly, I processed the 13 March file using the Legacy export of voltage using Ruskin v2.9, and calculated %sat and DO from the voltage and got the same values. Also, although the Rinko was calibrated in the field during this trip (12 Mar 2019) the values are compromised due to the Ruskin software and X6 and X7 incorrect settings. The previous March 2018 coefficients agree well with those collected in Oct 2020. The Mar 2018 calibration will be used to scale the data. Calibration issues: 2-pt Oxygen calibration was done in Kugluktuk prior to data collection however due to Ruskin software problem and incorrect X6 and X7 coefficients the resulting coefficients are suspect and the previous coefficients from 1 Mar 2018 will be used. 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 Station Name Cast Number Used File Name 14 KUG-1 5 (3rd downcast) 065579_20190313_2052 15 KUG-2 11 (3rd downcast) 065579_20190313_2052 16 KUG-3 17 (3rd downcast) 065579_20190313_2052 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, the mix of water and ice slush. This can create falsely fresh water but also with cooling during the cast, ice formation and brine rejection there can be a manufactured density inversion along the TS freezing line. The bottom 0.2m of data removed from all casts. The very bottom data tends to have density inversion and/or spikes. This removes very little data but cleans up the profile. Temperature shift and new Salinity a) Applied a 3 scan shift to advance temperature after confirming this was better than 2 or 4 scans. b) Smoothed temperature and conductivity to recalculate new salinity. However, due to large surface gradient in salinity, the original conductivity was used for the first 30 scans as the filtered conductivity had artificial spikes due to the filtering ‘overshoot’. Fluorometer Processed using a low pass filter (pl66) with a half amplitude period of 10 scans. Oxygen The RBR CTD was configured to output percent oxygen saturation (and the unused concentration [mg/l]) from the oxygen sensor and not volts. Calibration coefficients have been installed in the CTD. Coefficients G and H, the ones determined with the regular 2-point calibration, are visible as C0 and C1. Oxygen saturation was advanced by 3 seconds (18 scans) and 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. Salinity No edits Removed pressure reversals Interpolated to 0.2db bins, however these are NOT centered. Saved this cleaned dataset to a matlab *.mat files and an ODV *.o4x file 2019-31_CROW_Kug_cleandowncasts.mat and data_from_ 2019-31_CROW_Kug.txt Used script file p_RBR_CROW_2019_Kug.m for processing. !--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 2.0 2.0 -0.0138 0.0701 0.0586 0.379 8.89 86.89 2.2 2.2 -0.0142 0.0714 0.0598 0.378 8.95 87.44 2.4 2.4 -0.0145 0.0538 0.0440 0.376 9.00 87.94 2.6 2.6 -0.0141 0.0705 0.0590 0.374 9.04 88.36 2.8 2.8 -0.0323 0.0852 0.0723 0.372 9.08 88.73 3.0 3.0 -0.2702 0.1320 0.1154 0.369 9.17 89.01 3.2 3.2 -0.4814 4.0065 4.2317 0.366 8.99 89.23 3.4 3.4 -0.6399 16.2555 18.9425 0.360 8.16 89.42 3.6 3.6 -0.7378 21.3334 25.5688 0.351 7.82 89.54 3.8 3.8 -0.8026 22.2970 26.8968 0.340 7.76 89.59 4.0 4.0 -0.8580 22.5468 27.2798 0.324 7.76 89.71 4.2 4.2 -0.9280 22.5792 27.3653 0.307 7.78 89.79 4.4 4.4 -0.9723 22.5782 27.4043 0.290 7.79 89.84 4.6 4.6 -1.0103 22.5767 27.4446 0.271 7.80 89.88 4.8 4.8 -1.0427 22.5733 27.4708 0.257 7.82 90.05 5.0 4.9 -1.0717 22.5707 27.4897 0.246 7.83 90.14 5.2 5.1 -1.0851 22.5629 27.4919 0.239 7.85 90.27 5.4 5.3 -1.1156 22.5546 27.5096 0.240 7.94 91.32 5.6 5.5 -1.1387 22.5495 27.5245 0.241 7.97 91.53 5.8 5.7 -1.1436 22.5498 27.5303 0.243 7.97 91.58 6.0 5.9 -1.1450 22.5631 27.5449 0.243 7.96 91.51 6.2 6.1 -1.1533 22.5623 27.5567 0.242 7.96 91.46 6.4 6.3 -1.1725 22.5578 27.5687 0.239 7.96 91.42 6.6 6.5 -1.1605 22.5804 27.5848 0.237 7.96 91.50 6.8 6.7 -1.1476 22.5930 27.6025 0.236 7.97 91.62 7.0 6.9 -1.1247 22.6281 27.6083 0.235 8.00 91.97 7.2 7.1 -1.1427 22.6419 27.6384 0.228 8.02 92.24 7.4 7.3 -1.1996 22.5974 27.6513 0.225 8.02 92.10 7.6 7.5 -1.2284 22.5754 27.6433 0.227 8.02 92.02 7.8 7.7 -1.2278 22.5700 27.6204 0.233 8.01 91.92 8.0 7.9 -1.1182 22.6279 27.6147 0.235 7.99 91.87 8.2 8.1 -1.0654 22.6988 27.6514 0.236 7.97 91.79 8.4 8.3 -1.0355 22.7364 27.6804 0.236 7.95 91.74 8.6 8.5 -1.0279 22.7298 27.6642 0.233 7.94 91.55 8.8 8.7 -1.0198 22.7389 27.6648 0.229 7.92 91.42 9.0 8.9 -1.0157 22.7493 27.6769 0.221 7.91 91.32 9.2 9.1 -1.0485 22.7356 27.6877 0.212 7.93 91.50 9.4 9.3 -1.0751 22.7111 27.6809 0.221 7.95 91.66 9.6 9.5 -1.1048 22.6883 27.6787 0.230 7.94 91.45 9.8 9.7 -1.1354 22.6761 27.6888 0.227 7.97 91.64 10.0 9.9 -1.1156 22.6840 27.6839 0.219 7.94 91.40 10.2 10.1 -1.0922 22.7114 27.6943 0.219 7.92 91.26 10.4 10.3 -1.1083 22.7076 27.7061 0.225 7.95 91.56 10.6 10.5 -1.1351 22.6880 27.7007 0.228 7.96 91.62 10.8 10.7 -1.1476 22.6713 27.6920 0.228 7.97 91.72 11.0 10.9 -1.1518 22.6625 27.6891 0.229 7.98 91.77 11.2 11.1 -1.1396 22.6826 27.7000 0.229 7.99 91.88 11.4 11.3 -1.1308 22.7022 27.7127 0.228 7.99 91.90 11.6 11.5 -1.1519 22.6813 27.7146 0.228 8.00 92.00 11.8 11.7 -1.2058 22.6451 27.7067 0.227 8.01 92.02 12.0 11.9 -1.2547 22.5993 27.6973 0.227 8.02 92.00 12.2 12.1 -1.2841 22.5777 27.6948 0.227 8.03 92.06 12.4 12.3 -1.3024 22.5732 27.7061 0.229 8.04 92.08 12.6 12.5 -1.3163 22.5723 27.7206 0.232 8.04 92.01 12.8 12.7 -1.3139 22.5721 27.7117 0.229 8.04 92.02 13.0 12.9 -1.3099 22.5770 27.7156 0.225 8.04 92.05 13.2 13.1 -1.2991 22.5838 27.7170 0.218 8.04 92.09 13.4 13.3 -1.2964 22.5892 27.7174 0.217 8.04 92.17 13.6 13.5 -1.2967 22.5874 27.7165 0.218 8.05 92.19 13.8 13.7 -1.2974 22.5841 27.7147 0.219 8.05 92.19 14.0 13.9 -1.3022 22.5822 27.7151 0.220 8.06 92.29 14.2 14.1 -1.3145 22.5750 27.7148 0.221 8.06 92.30 14.4 14.3 -1.3214 22.5651 27.7121 0.222 8.07 92.34 14.6 14.5 -1.3324 22.5596 27.7112 0.224 8.07 92.36 14.8 14.7 -1.3377 22.5576 27.7151 0.227 8.07 92.35 15.0 14.8 -1.3446 22.5582 27.7210 0.232 8.07 92.35 15.2 15.0 -1.3487 22.5574 27.7249 0.237 8.07 92.29 15.4 15.2 -1.3486 22.5592 27.7275 0.240 8.07 92.32 15.6 15.4 -1.3472 22.5633 27.7304 0.239 8.07 92.37 15.8 15.6 -1.3452 22.5663 27.7326 0.234 8.08 92.43 16.0 15.8 -1.3441 22.5671 27.7325 0.229 8.09 92.60 16.2 16.0 -1.3444 22.5668 27.7326 0.228 8.11 92.78 16.4 16.2 -1.3427 22.5698 27.7353 0.232 8.09 92.63 16.6 16.4 -1.3397 22.5741 27.7388 0.234 8.08 92.47 16.8 16.6 -1.3386 22.5771 27.7389 0.233 8.08 92.52 17.0 16.8 -1.3343 22.5793 27.7377 0.232 8.07 92.42 17.2 17.0 -1.3196 22.5960 27.7533 0.231 8.06 92.31 17.4 17.2 -1.2930 22.6455 27.7800 0.232 8.04 92.15 17.6 17.4 -1.2402 22.6754 27.7897 0.233 8.01 92.00 17.8 17.6 -1.1923 22.7083 27.7851 0.234 7.99 91.89 18.0 17.8 -1.1674 22.7273 27.7796 0.233 7.98 91.74 18.2 18.0 -1.1397 22.7397 27.7728 0.229 7.95 91.46 18.4 18.2 -1.0890 22.7714 27.7707 0.224 7.92 91.26 18.6 18.4 -1.0535 22.8011 27.7741 0.221 7.91 91.21 18.8 18.6 -1.0328 22.8129 27.7731 0.220 7.92 91.38 19.0 18.8 -1.0054 22.8295 27.7673 0.221 7.92 91.45 19.2 19.0 -0.9895 22.8375 27.7651 0.224 7.91 91.37 19.4 19.2 -0.9777 22.8491 27.7671 0.225 7.90 91.27 19.6 19.4 -0.9637 22.8611 27.7702 0.226 7.88 91.08 19.8 19.6 -0.9545 22.8667 27.7730 0.225 7.87 91.00 20.0 19.8 -0.9543 22.8679 27.7723 0.223 7.86 90.90 20.2 20.0 -0.9817 22.8348 27.7598 0.219 7.86 90.86 20.4 20.2 -1.0002 22.8327 27.7465 0.216 7.86 90.85 20.6 20.4 -0.9938 22.8150 27.7511 0.213 7.86 90.81 20.8 20.6 -0.9708 22.8654 27.7738 0.212 7.85 90.77 21.0 20.8 -0.9259 22.9077 27.7916 0.213 7.84 90.80 21.2 21.0 -0.8966 22.9156 27.7903 0.214 7.83 90.75 21.4 21.2 -0.8823 22.9371 27.7843 0.214 7.83 90.72 21.6 21.4 -0.8851 22.9218 27.7798 0.212 7.83 90.73 21.8 21.6 -0.8920 22.9143 27.7747 0.211 7.83 90.69 22.0 21.8 -0.9010 22.9139 27.7813 0.210 7.83 90.66 22.2 22.0 -0.8957 22.9184 27.7838 0.267 7.81 90.44 22.4 22.2 -0.8394 22.9374 27.7583 0.210 7.76 90.02 22.6 22.4 -0.9456 22.9044 27.8103 0.214 7.85 90.81 22.8 22.6 -1.0116 22.8356 27.7835 0.212 7.86 90.75 23.0 22.8 -1.0771 22.7706 27.7577 0.209 7.87 90.77 23.2 23.0 -0.9639 22.8564 27.7764 0.210 7.84 90.63 23.4 23.2 -0.9183 22.9311 27.8042 0.211 7.82 90.60 23.6 23.4 -0.8953 22.9404 27.8134 0.210 7.81 90.53 23.8 23.6 -0.8637 22.9504 27.7999 0.206 7.80 90.46 24.0 23.8 -0.8524 22.9654 27.7994 0.203 7.78 90.30 24.2 24.0 -0.8522 22.9617 27.7960 0.202 7.77 90.11 24.4 24.2 -0.8241 22.9691 27.7924 0.204 7.72 89.69 24.6 24.4 -0.8190 22.9926 27.8042 0.206 7.71 89.52 24.8 24.5 -0.8145 22.9968 27.8170 0.206 7.70 89.49 25.0 24.7 -0.8066 23.0164 27.8247 0.204 7.70 89.51 25.2 24.9 -0.7954 23.0200 27.8218 0.202 7.70 89.50 25.4 25.1 -0.7576 23.0492 27.8191 0.202 7.68 89.30 25.6 25.3 -0.7504 23.0482 27.8209 0.204 7.67 89.24 25.8 25.5 -0.7527 23.0447 27.8194 0.207 7.68 89.38 26.0 25.7 -0.7858 23.0221 27.8108 0.208 7.71 89.58 26.2 25.9 -0.8106 22.9904 27.8007 0.207 7.73 89.77 26.4 26.1 -0.8180 22.9888 27.8058 0.204 7.75 89.96 26.6 26.3 -0.8107 23.0104 27.8214 0.202 7.75 90.09 26.8 26.5 -0.8151 23.0111 27.8237 0.201 7.76 90.13 27.0 26.7 -0.8387 22.9803 27.8110 0.201 7.78 90.28 27.2 26.9 -0.8949 22.9274 27.8042 0.201 7.79 90.31 27.4 27.1 -0.9373 22.9174 27.8076 0.201 7.80 90.28 27.6 27.3 -0.9695 22.8842 27.8096 0.199 7.80 90.25 27.8 27.5 -0.9729 22.8897 27.8150 0.197 7.80 90.17 28.0 27.7 -0.9598 22.9113 27.8277 0.198 7.79 90.15 28.2 27.9 -0.9478 22.9249 27.8342 0.201 7.78 90.06 28.4 28.1 -0.9257 22.9393 27.8336 0.206 7.77 89.98 28.6 28.3 -0.8923 22.9560 27.8354 0.210 7.76 89.95 28.8 28.5 -0.8713 22.9867 27.8411 0.213 7.75 89.90 29.0 28.7 -0.8501 23.0018 27.8443 0.214 7.74 89.86 29.2 28.9 -0.8204 23.0157 27.8457 0.213 7.73 89.80 29.4 29.1 -0.8015 23.0359 27.8510 0.212 7.72 89.76 29.6 29.3 -0.7892 23.0596 27.8579 0.211 7.72 89.71 29.8 29.5 -0.7348 23.0865 27.8571 0.210 7.70 89.69 30.0 29.7 -0.6989 23.1101 27.8537 0.209 7.69 89.64 30.2 29.9 -0.6823 23.1276 27.8547 0.207 7.68 89.53 30.4 30.1 -0.6642 23.1357 27.8533 0.204 7.66 89.33 30.6 30.3 -0.6493 23.1438 27.8504 0.202 7.64 89.15 30.8 30.5 -0.6373 23.1532 27.8510 0.201 7.63 89.08 31.0 30.7 -0.6269 23.1642 27.8531 0.201 7.63 89.04 31.2 30.9 -0.6149 23.1700 27.8550 0.200 7.62 88.96 31.4 31.1 -0.6052 23.1819 27.8577 0.200 7.61 88.94 31.6 31.3 -0.5991 23.1890 27.8611 0.199 7.61 88.93 31.8 31.5 -0.5910 23.1976 27.8645 0.198 7.61 88.93 32.0 31.7 -0.5757 23.2083 27.8674 0.197 7.60 88.92 32.2 31.9 -0.5632 23.2198 27.8699 0.197 7.60 88.94 32.4 32.1 -0.5549 23.2286 27.8716 0.198 7.61 89.04 32.6 32.3 -0.5500 23.2306 27.8713 0.198 7.61 89.06 32.8 32.5 -0.5555 23.2256 27.8690 0.198 7.61 89.10 33.0 32.7 -0.5620 23.2202 27.8684 0.199 7.61 89.07 33.2 32.9 -0.5624 23.2236 27.8729 0.200 7.61 89.04 33.4 33.1 -0.5585 23.2312 27.8786 0.202 7.61 89.04 33.6 33.3 -0.5559 23.2314 27.8767 0.203 7.60 88.98 33.8 33.5 -0.5552 23.2312 27.8774 0.203 7.60 88.98 34.0 33.7 -0.5518 23.2409 27.8832 0.202 7.60 88.98 34.2 33.9 -0.5454 23.2444 27.8834 0.200 7.60 89.00 34.4 34.1 -0.5422 23.2463 27.8828 0.200 7.60 88.96 34.6 34.2 -0.5391 23.2476 27.8831 0.199 7.60 88.95 34.8 34.4 -0.5381 23.2497 27.8815 0.199 7.60 88.97 35.0 34.6 -0.5347 23.2542 27.8879 0.201 7.60 89.01 35.2 34.8 -0.5529 23.2472 27.8904 0.202 7.61 89.01 35.4 35.0 -0.5683 23.2291 27.8841 0.204 7.61 88.98