Cruise Information

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ExpoCode: 74CH19770414

Line: AR28

Aliases: 74C677

Ship/Country: Challenger/UK

Chief Scientists: Holliday/NOC

Cruise Dates: Thu Apr 14, 1977 -Tue Apr 19, 1977

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Data History

Permalink	Date	Person	Data Type	Action	Summary
331284	2007-12-20	Muus, Dave	CTD	website update	Data Online
Notes for ELLETT data (ar28 1975-1992) Dec 20, 2007/dmF 1. Original data from 2004.03.02_AR28_CTD_HOLLIDAY No quality flags. 2. Justin Fields & Danie Kinkade converted to Exchange format: 2006.06.16_AR28_CTD_RFMT_DBK (ar28_1975a) 2006.08.04_RFMT_AR28_CTD_DBK (ar28_1975b) 2006.08.06_RFMT_AR28_CTD_DBK (ar28_1975c) 2006.08.08_RFMT_AR28_CTD_DBK (ar28_1976a - ar28_1977a) 2006.08.10_RFMT_AR28_CTD_DBK (ar28_1977c - ar28_1992a) 2007.07.12_AR28_CTD_RFMT_JFIELDS (ar28_1975a - ar28_1992a) Added quality flags: "2" CTDPRS formated F9.1 CTDTMP " F9.4 THETA " F9.4 3. dm modified July-August 2007: a) Changed Expocodes to new format (CCSSYYYYMMDD) See n) for list of Expocodes. b) Left originator's THETA in file. Normally not in CTD Exchange files. Compared to theta calculated with JOA. Near surface values vary +/- .003 and deep values vary +/- .001 c) Changed quality flags for ar28_1975c_00008_00001_ct1.csv: CTDPRS, CTDSAL, CTDTMP, THETA, 1111.0,2, 35.2266,2, 7.4700,2, 7.3549,2 1113.0,2, 35.2270,2, 7.4700,2, 7.3547,2 1115.0,2, 35.2285,2, 7.4650,2, 7.3495,2 1117.0,2, 35.2237,2, 7.4567,2, 7.3411,2 1119.0,2, 35.2193,2, 7.4483,2, 7.3326,2 1121.0,2, 35.2150,2, 7.4400,2, 7.3241,2 1123.0,2, 35.4610,3, 7.4300,2, 7.3135,2 CTDSAL FLAG 3 vs 2 1125.0,2, 35.3800,3, 7.4267,2, 7.3101,2 CTDSAL FLAG 3 vs 2 1127.0,2, 35.2990,3, 7.4233,2, 7.3068,2 CTDSAL FLAG 3 vs 2 1129.0,2, 35.2180,2, 7.4200,2, 7.3034,2 1131.0,2, 35.2165,2, 7.3950,2, 7.2784,2 1133.0,2, 33.9363,4, 7.3792,2, 7.2646,2 CTDSAL FLAG 4 vs 2 1135.0,2, 32.6560,4, 7.3633,2, 7.2509,2 CTDSAL FLAG 4 vs 2 1137.0,2, 35.2110,3, 7.3200,2, 7.2033,2 CTDSAL FLAG 3 vs 2 1139.0,2, 35.2180,2, 7.3200,2, 7.2031,2 1141.0,2, 35.2170,2, 7.2967,2, 7.1797,2 1143.0,2, 35.2177,2, 7.2833,2, 7.1663,2 1145.0,2, 35.2185,2, 7.2700,2, 7.1528,2 1147.0,2, 35.2173,2, 7.2700,2, 7.1526,2 1149.0,2, 35.2160,2, 7.2700,2, 7.1524,2 d) Changed quality flags for ar28_1976a_00007_00001_ct1.csv: 217.5,2, 35.3047,2, 9.3400,2, 9.3157,2 222.5,2, 35.3015,2, 9.3300,2, 9.3051,2 227.5,2, 35.2990,2, 9.3300,2, 9.3046,2 232.5,2, 33.4022,4, 9.3300,2, 9.3047,2 CTDSAL FLAG 4 vs 2 237.5,2, 35.2930,2, 9.3300,2, 9.3034,2 242.5,2, 35.3020,2, 9.3000,2, 9.2729,2 247.5,2, 35.2995,2, 9.2900,2, 9.2624,2 252.5,2, 34.8453,4, 9.2700,2, 9.2420,2 CTDSAL FLAG 4 vs 2 257.5,2, 35.2923,2, 9.2500,2, 9.2213,2 262.5,2, 35.2923,2, 9.2367,2, 9.2075,2 267.5,2, 35.2907,2, 9.2267,2, 9.1969,2 272.5,2, 35.2860,2, 9.2000,2, 9.1697,2 277.5,2, 35.2910,2, 9.1850,2, 9.1542,2 282.5,2, 35.2920,2, 9.1800,2, 9.1486,2 597.5,2, 35.2660,2, 8.6900,2, 8.6247,2 602.5,2, 35.2690,2, 8.6800,2, 8.6142,2 607.5,2, 35.2620,2, 8.6700,2, 8.6037,2 612.5,2, 34.8323,4, 8.6533,2, 8.5869,2 CTDSAL FLAG 4 vs 2 617.5,2, 35.2630,2, 8.6233,2, 8.5561,2 622.5,2, 35.2660,2, 8.6200,2, 8.5522,2 627.5,2, 35.2580,2, 8.6033,2, 8.5350,2 632.5,2, 35.2640,2, 8.5900,2, 8.5212,2 637.5,2, 35.2603,2, 8.5775,2, 8.5082,2 642.5,2, 35.2600,2, 8.5500,2, 8.4803,2 e) ar28_1976a_00012_00001_ct1.csv has different T-S pattern from adjacent stations. Is on slope and was done on April 2. May be spring time effect. Left as is. f) ar28_1978b 2006.08.10_RFMT_AR28_CTD_DBK has file names with 1987b instead of 1978b. Left original files as is and corrected on-line files. g) ar28_1978c and ar28_1978d have same cruise dates in HOLLIDAY 00_README files, July 11 - Sept 17, 1978. First has originator expocode of 74c11b78 (Stations 167-187, Aug 9-11) and second has 74c11d78 (Sta 369-380, Sept 11-13). Cannot find a cruise report in Documentation directory. Combined into one cruise with new Expocode 74CH19780711. h) ar28_1981b cruise report(ch6_81.pdf) says this cruise departed April 6 and returned to Stornoway April 15 at 0740(called Leg A in cruise report) and departed April 16 at 1130(called Leg B). Personnel changes were made. This cruise was originally reported with one expocode (74c681) for Stations 2-11 and 37-56. I split them into 2 cruises with expocodes: 74CH19810406 for Stations 2-11 and 74CH19810416 for Stations 37-56 i) Changed file names for ar28_1981c and ar28_1983b from ar18_198..... to ar28_198..... to match all other exchange file names. j) ar28_1983a has cruise dates "11 May - 30 Jun 1983" in HOLLIDAY 00_README. Cruise report ch7_83.pdf has Leg A "May 11-23, 1983" Leg B "May 23-June 2, 1983" All ctd data is from Leg B so used 74CH19830523 for EXPOCODE. k) Changed quality flags for ar28_1983b_00066_00001_ct1.csv: 602.5,2, 35.3925,2, 9.3000,2, 9.2313,2 607.5,2, 35.3860,2, 9.2900,2, 9.2208,2 612.5,2, 35.3660,3, 9.2700,2, 9.2003,2 CTDSAL FLAG 3 vs 2 617.5,2, 50.9697,4, 9.2500,2, 9.1656,2 CTDSAL FLAG 4 vs 2 622.5,2, 35.3725,3, 9.2350,2, 9.1643,2 CTDSAL FLAG 3 vs 2 627.5,2, 35.3745,2, 9.2200,2, 9.1488,2 632.5,2, 35.3730,2, 9.2200,2, 9.1482,2 l) ar28_1983b Stations 55 and 56 have exactly the same date, time position and bottom depth. Sta 55 20-115db and Sta 56 45-745db. Left as is. m) ar28_1992a Stations have 1 decibar intervals. All previous data was 2 decibar data. Left as is for now. ar28_1992a Station 30 has temperature but no salinity for 2-6db. Used quality flag 9 for CTDSAL & THETA. 3.0,2,-999.0000,9, 10.8565,2,-999.0000,9 4.0,2,-999.0000,9, 10.8515,2,-999.0000,9 5.0,2,-999.0000,9, 10.8535,2,-999.0000,9 6.0,2,-999.0000,9, 10.8511,2,-999.0000,9 7.0,2, 35.2356,2, 10.8517,2, 10.8508,2 00_README flle in ar28_1992a/original/2004.03.02_AR28_CTD_HOLLIDAY has info from a Feb 1991 cruise, not ar28_1992a. n) Following is a comparison of cruise indentifiers:

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