*2021/03/10 18:19:25.53 *IOS HEADER VERSION 2.0 2016/04/28 2016/06/13 MATLAB *FILE START TIME : UTC 2020/02/03 18:02:29.801 NUMBER OF RECORDS : 132 DATA DESCRIPTION : CTD FILE TYPE : ASCII NUMBER OF CHANNELS : 8 $TABLE: CHANNELS ! No Name Units Minimum Maximum !--- ----------------------------------- ----------------- --------- ------- 1 Pressure decibar 2.2 28.4 2 Depth metres 2.2 28.1 3 Temperature 'deg C (ITS90)' -1.4795 -1.4719 4 Conductivity mS/cm 22.3363 22.3490 5 Salinity PSS-78 27.5502 27.5578 6 Fluorescensce:URU:Turner mg/m^3 0.201 0.271 7 Oxygen:Dissolved:Rinko mL/L 8.59 8.65 8 Oxygen:Dissolved:Saturation:Rinko % 97.87 98.49 $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 : 2020-37 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 : DS20-01-Cst3 EVENT NUMBER : 3 LATITUDE : 68 56.20500 N ! (deg min) LONGITUDE : 105 13.99100 W ! (deg min) WATER DEPTH : 33.1 $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 : 65543 $TABLE: SENSORS ! Name Serial No ! --------------------------------------------------- ---------- 'Temperature: RBR Concerto' 65543 'Conductivity: RBR Concerto' 65543 'Oxygen:JFEAdvantechRinkoIII TypeA foil' 5 'Fluorometer: Turner Design: Cyclops' 2102849 $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_202037CROW_SINGLE 1.0 2021/03/10 18:19:26 132 132 $END $REMARKS -PRNTIOS_FMTS_202037CROW_SINGLE processing: 2021/03/10 18:19:25 $END *COMMENTS Program Summary During this program, two DFO scientist from the Institute of Ocean Sciences (Sidney, BC) went to Cambridge Bay and then to Kugluktuk. On this trip the scientists met with Rangers for training and nearby data collection. CTD casts were collected in each community. The program was going to include a meeting with the Rangers in Paulatuk in April, however this was cancelled due to COVID-19 precautions. 31 Jan to 7 Feb 2020 In Cambridge Bay (Mike Dempsey and Kristina Brown) 7 to 10 Feb 2020 In Kugluktuk (Mike Dempsey and Kristina Brown) For more information see the cruise report: CROW 2020 Report.pdf Cambridge Bay CTD Data There are 10 stations in three data sets: 2 Feb 2020 Cambridge Bay 2 stations 065543_20200202_2045_data.txt 3 Feb 2020 Dease St 4 stations 065543_20200204_0324_data.txt 4 Feb 2020 UN Islands 4 stations 065543_20200205_0310_data.txt Meta data are recorded in: CROW 2020 log_2020-02-27.xlsx Comments 1. UN20 station shows freezing on first and second downcast, but the third cast is fine. The new procedure of always taking 3 casts per station is excellent. 2. The RINKO oxygen was abnormally low for DS20-01, AZFP and UN10. They were 15 to 30% lower than the other stations at 95% saturation at surface. This was found to be a problem with Ruskin export software and was corrected March 2021 using the updated Ruskin software. 3. Chlorophyll sensor is dropping to 0.1 ug/l on some stations and then jumping back to the typical 0.3ug/l values. There are no phytoplankton to measure during this season, however it would be good to service this sensor. Equipment RBR Concerto 65543 w/ 6Hz sampling rate Calibration Dates 25 Jun 2018 (RBR) new Turner Cyclops Fluorometer sensor #2102849 Fluorometer set for 0 to 5 ug/l range Calibration Dates 15 Feb 2018 (3pt-check, IOS), Jan 2013 (new) JFE Advantech RINKO III Oxygen sensor #5 Type-A foil, Reporting in % Saturation Calibration Dates 28 Feb 2019 (2pt-cal, IOS), 25 Jan 2009 (new) Air thermometer SN5 Ice Auger# SN3 Downrigger# SN6 Kit #4 Data Collection Method Follow protocol laid out in Ranger science manual ver7 2015.doc Changes to protocol: Stations typically had a soak then three casts (RBR left in the water) per station. Processing 2021-03-09 Update RBR identified and fixed the problem in Ruskin that was calculating oxygen saturation using the fixed temperature of 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 X7 from 0.0 to 1.0e-15 2. Clicked “Store and recompute data” 3. Export > Txt.zip Note the *.RSK is now changed as well. Calibration issues None identified 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, typically the last downcast (ie second or third). Station Name Cast Number Used File Name 1 CBay1 5 (3rd downcast) 065543_20200202_2045 2 West Arm 9 (2nd downcast) 065543_20200202_2045 3 DS20-01 3 (2nd downcast) 065543_20200204_0324 4 DS20-03 11 (3rd downcast) 065543_20200204_0324 5 DS20-06 15 (2nd downcast) 065543_20200204_0324 6 DS20-02 21 (2nd downcast) 065543_20200204_0324 7 AZFP 5 (3rd downcast) 065543_20200205_0310 8 UN10 11 (3rd downcast) 065543_20200205_0310 9 UN20 17 (3rd downcast) 065543_20200205_0310 10 UN30 21 (2nd downcast) 065543_20200205_0310 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 and cooling during the cast further and beginning to freeze and reject brine this can create a density inversion 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 (typically use 2 or 3 scans). b) Smoothed temperature and conductivity to recalculate new salinity. Conductivity smoothing only applied after first 30 scans to prevent overshooting from possible large surface salinity gradients. Fluorometer Processed using a low pass filter (pl66.m) with a half amplitude period of 10 scans. Oxygen (RINKO) RBR was configured to output percent oxygen saturation (and the unused concentration [mg/l]) and not volts. Calibration coefficients have been installed in the CTD. Oxygen saturation was advanced by 3 seconds (18 scans) and oxygen concentration [mL/L] was calculated from percent saturation. Oxygen [ml/l] = full sat. concentration [ml/l] * percent sat Full saturation concentration 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. Following correction to the RUSKIN software using RUSKIN v2.10, percent oxygen saturation and oxygen concentration [ml/l] were recalculated. 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 levels. These are NOT averages of bins but linear interpolation to 0.2 db levels using the nearest points. Special edits Station Edit All Reprocessed data with Ruskin 2.10 to correct oxygen. Saved this cleaned dataset to matlab *.mat file and an ODV *.o4x file 2020-37_CROW_CamBay1_cleandowncasts.mat, 2020-37_CROW_CamBay1.o4x 2020-37_CROW_CamBay2_cleandowncasts.mat, 2020-37_CROW_CamBay2.o4x 2020-37_CROW_CamBay3_cleandowncasts.mat, 2020-37_CROW_CamBay3.o4x Used script file p_RBR_CROW_2020_CB1.m for processing stations 1,2. Used script file p_RBR_CROW_2020_CB2.m for processing stations 3 to 6. Used script file p_RBR_CROW_2020_CB3.m for processing stations 7 to 10 !--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 -1.4768 22.3405 27.5578 0.213 8.60 97.90 2.4 2.4 -1.4769 22.3402 27.5575 0.216 8.60 97.89 2.6 2.6 -1.4768 22.3392 27.5560 0.215 8.61 98.01 2.8 2.8 -1.4768 22.3383 27.5547 0.213 8.60 97.97 3.0 3.0 -1.4770 22.3385 27.5550 0.212 8.61 98.03 3.2 3.2 -1.4772 22.3384 27.5548 0.213 8.62 98.11 3.4 3.4 -1.4770 22.3373 27.5531 0.216 8.61 98.07 3.6 3.6 -1.4771 22.3370 27.5529 0.216 8.62 98.11 3.8 3.8 -1.4778 22.3375 27.5539 0.213 8.62 98.16 4.0 4.0 -1.4777 22.3370 27.5532 0.210 8.61 98.05 4.2 4.2 -1.4777 22.3374 27.5537 0.213 8.61 98.08 4.4 4.4 -1.4779 22.3374 27.5536 0.223 8.62 98.16 4.6 4.6 -1.4778 22.3371 27.5531 0.224 8.62 98.17 4.8 4.8 -1.4777 22.3364 27.5524 0.216 8.62 98.18 5.0 4.9 -1.4776 22.3378 27.5534 0.208 8.62 98.20 5.2 5.1 -1.4781 22.3378 27.5541 0.220 8.63 98.25 5.4 5.3 -1.4784 22.3368 27.5529 0.247 8.63 98.23 5.6 5.5 -1.4786 22.3364 27.5522 0.268 8.62 98.20 5.8 5.7 -1.4786 22.3364 27.5520 0.271 8.63 98.23 6.0 5.9 -1.4785 22.3364 27.5520 0.255 8.62 98.20 6.2 6.1 -1.4785 22.3366 27.5520 0.236 8.63 98.23 6.4 6.3 -1.4784 22.3364 27.5520 0.221 8.63 98.25 6.6 6.5 -1.4787 22.3366 27.5520 0.210 8.63 98.29 6.8 6.7 -1.4784 22.3363 27.5519 0.206 8.63 98.22 7.0 6.9 -1.4786 22.3371 27.5524 0.209 8.63 98.27 7.2 7.1 -1.4787 22.3376 27.5527 0.219 8.63 98.25 7.4 7.3 -1.4783 22.3368 27.5518 0.225 8.63 98.23 7.6 7.5 -1.4785 22.3364 27.5516 0.223 8.63 98.32 7.8 7.7 -1.4785 22.3378 27.5530 0.211 8.64 98.34 8.0 7.9 -1.4787 22.3379 27.5533 0.204 8.64 98.39 8.2 8.1 -1.4795 22.3373 27.5527 0.212 8.64 98.38 8.4 8.3 -1.4789 22.3373 27.5528 0.234 8.64 98.40 8.6 8.5 -1.4787 22.3390 27.5529 0.254 8.64 98.36 8.8 8.7 -1.4790 22.3367 27.5516 0.250 8.64 98.41 9.0 8.9 -1.4790 22.3374 27.5513 0.236 8.65 98.46 9.2 9.1 -1.4789 22.3371 27.5526 0.221 8.65 98.45 9.4 9.3 -1.4789 22.3373 27.5520 0.213 8.65 98.45 9.6 9.5 -1.4785 22.3374 27.5510 0.212 8.64 98.38 9.8 9.7 -1.4783 22.3385 27.5531 0.215 8.64 98.38 10.0 9.9 -1.4791 22.3403 27.5548 0.213 8.64 98.38 10.2 10.1 -1.4785 22.3380 27.5520 0.210 8.64 98.39 10.4 10.3 -1.4783 22.3391 27.5524 0.210 8.64 98.39 10.6 10.5 -1.4780 22.3391 27.5527 0.210 8.64 98.43 10.8 10.7 -1.4787 22.3382 27.5521 0.209 8.64 98.44 11.0 10.9 -1.4782 22.3387 27.5519 0.207 8.64 98.41 11.2 11.1 -1.4771 22.3386 27.5515 0.205 8.64 98.42 11.4 11.3 -1.4776 22.3388 27.5513 0.205 8.65 98.49 11.6 11.5 -1.4777 22.3384 27.5511 0.208 8.64 98.42 11.8 11.7 -1.4776 22.3391 27.5512 0.213 8.64 98.43 12.0 11.9 -1.4776 22.3387 27.5518 0.218 8.64 98.37 12.2 12.1 -1.4783 22.3387 27.5515 0.219 8.63 98.32 12.4 12.3 -1.4782 22.3382 27.5506 0.218 8.64 98.35 12.6 12.5 -1.4777 22.3384 27.5503 0.216 8.64 98.35 12.8 12.7 -1.4780 22.3388 27.5512 0.216 8.64 98.34 13.0 12.9 -1.4772 22.3396 27.5517 0.215 8.64 98.40 13.2 13.1 -1.4762 22.3405 27.5522 0.213 8.64 98.37 13.4 13.3 -1.4762 22.3404 27.5524 0.212 8.63 98.32 13.6 13.5 -1.4759 22.3412 27.5518 0.213 8.63 98.29 13.8 13.7 -1.4768 22.3412 27.5517 0.214 8.63 98.24 14.0 13.9 -1.4759 22.3424 27.5532 0.213 8.63 98.33 14.2 14.1 -1.4737 22.3432 27.5528 0.210 8.64 98.39 14.4 14.3 -1.4734 22.3435 27.5523 0.207 8.64 98.34 14.6 14.5 -1.4742 22.3434 27.5532 0.206 8.64 98.37 14.8 14.7 -1.4740 22.3445 27.5537 0.205 8.63 98.27 15.0 14.8 -1.4751 22.3429 27.5530 0.206 8.63 98.23 15.2 15.0 -1.4771 22.3407 27.5513 0.207 8.62 98.17 15.4 15.2 -1.4765 22.3400 27.5503 0.210 8.62 98.21 15.6 15.4 -1.4760 22.3427 27.5512 0.212 8.62 98.14 15.8 15.6 -1.4753 22.3415 27.5510 0.212 8.62 98.21 16.0 15.8 -1.4754 22.3418 27.5516 0.210 8.63 98.24 16.2 16.0 -1.4759 22.3431 27.5533 0.209 8.62 98.21 16.4 16.2 -1.4760 22.3409 27.5516 0.209 8.63 98.23 16.6 16.4 -1.4757 22.3421 27.5502 0.210 8.62 98.19 16.8 16.6 -1.4743 22.3440 27.5521 0.211 8.63 98.32 17.0 16.8 -1.4754 22.3441 27.5532 0.212 8.63 98.32 17.2 17.0 -1.4739 22.3438 27.5526 0.214 8.63 98.29 17.4 17.2 -1.4750 22.3444 27.5530 0.215 8.62 98.18 17.6 17.4 -1.4758 22.3429 27.5522 0.213 8.62 98.11 17.8 17.6 -1.4733 22.3432 27.5514 0.211 8.62 98.20 18.0 17.8 -1.4740 22.3449 27.5521 0.209 8.63 98.28 18.2 18.0 -1.4741 22.3440 27.5522 0.210 8.63 98.29 18.4 18.2 -1.4725 22.3452 27.5515 0.212 8.63 98.29 18.6 18.4 -1.4731 22.3449 27.5518 0.211 8.63 98.29 18.8 18.6 -1.4742 22.3453 27.5539 0.208 8.63 98.28 19.0 18.8 -1.4759 22.3456 27.5540 0.210 8.62 98.16 19.2 19.0 -1.4750 22.3426 27.5512 0.223 8.62 98.13 19.4 19.2 -1.4735 22.3433 27.5505 0.243 8.62 98.12 19.6 19.4 -1.4750 22.3456 27.5529 0.255 8.62 98.13 19.8 19.6 -1.4742 22.3441 27.5520 0.241 8.61 98.08 20.0 19.8 -1.4732 22.3467 27.5521 0.223 8.61 98.07 20.2 20.0 -1.4728 22.3460 27.5521 0.209 8.60 97.98 20.4 20.2 -1.4723 22.3466 27.5518 0.204 8.61 98.05 20.6 20.4 -1.4726 22.3463 27.5525 0.205 8.60 98.00 20.8 20.6 -1.4732 22.3474 27.5535 0.208 8.60 97.98 21.0 20.8 -1.4724 22.3479 27.5535 0.212 8.60 97.92 21.2 21.0 -1.4725 22.3470 27.5529 0.215 8.60 97.91 21.4 21.2 -1.4724 22.3477 27.5523 0.215 8.60 97.90 21.6 21.4 -1.4719 22.3472 27.5521 0.214 8.61 98.02 21.8 21.6 -1.4723 22.3473 27.5519 0.213 8.61 98.11 22.0 21.8 -1.4719 22.3467 27.5518 0.211 8.61 98.07 22.2 22.0 -1.4728 22.3476 27.5529 0.210 8.61 98.10 22.4 22.2 -1.4735 22.3477 27.5533 0.209 8.61 98.11 22.6 22.4 -1.4739 22.3458 27.5521 0.209 8.61 98.08 22.8 22.6 -1.4742 22.3459 27.5519 0.209 8.61 98.05 23.0 22.8 -1.4749 22.3461 27.5529 0.210 8.61 98.00 23.2 23.0 -1.4755 22.3462 27.5527 0.211 8.60 97.97 23.4 23.2 -1.4760 22.3451 27.5523 0.214 8.60 97.94 23.6 23.4 -1.4759 22.3452 27.5523 0.217 8.60 97.93 23.8 23.6 -1.4759 22.3461 27.5525 0.221 8.59 97.87 24.0 23.8 -1.4759 22.3452 27.5525 0.221 8.60 97.90 24.2 24.0 -1.4760 22.3461 27.5532 0.218 8.60 97.99 24.4 24.2 -1.4761 22.3468 27.5535 0.215 8.61 98.03 24.6 24.4 -1.4761 22.3454 27.5526 0.215 8.60 97.98 24.8 24.5 -1.4760 22.3464 27.5526 0.215 8.61 98.04 25.0 24.7 -1.4760 22.3466 27.5536 0.214 8.61 98.09 25.2 24.9 -1.4760 22.3471 27.5535 0.209 8.62 98.15 25.4 25.1 -1.4759 22.3466 27.5529 0.205 8.61 98.09 25.6 25.3 -1.4760 22.3466 27.5529 0.202 8.61 98.05 25.8 25.5 -1.4761 22.3464 27.5529 0.201 8.61 98.04 26.0 25.7 -1.4760 22.3465 27.5524 0.203 8.61 97.99 26.2 25.9 -1.4760 22.3461 27.5525 0.205 8.60 97.91 26.4 26.1 -1.4761 22.3473 27.5532 0.209 8.61 97.99 26.6 26.3 -1.4760 22.3472 27.5534 0.211 8.61 98.00 26.8 26.5 -1.4762 22.3472 27.5535 0.212 8.61 98.02 27.0 26.7 -1.4761 22.3478 27.5537 0.212 8.61 98.06 27.2 26.9 -1.4760 22.3476 27.5531 0.212 8.61 98.09 27.4 27.1 -1.4760 22.3468 27.5526 0.211 8.61 98.04 27.6 27.3 -1.4760 22.3477 27.5533 0.210 8.61 97.99 27.8 27.5 -1.4759 22.3482 27.5540 0.207 8.60 97.96 28.0 27.7 -1.4757 22.3478 27.5531 0.206 8.60 97.92 28.2 27.9 -1.4758 22.3477 27.5530 0.205 8.60 97.93 28.4 28.1 -1.4758 22.3490 27.5543 0.205 8.60 97.93