SCHOOL OF OCEANOGRAPHY

Transcription

1 As s et & e se. 4.1 SCHOOL OF OCEANOGRAPHY WAZP Observations during MILDEX October-November 1983 by Melora M. Park Michael D. Brown Thomas M. Dillon Priscilla A. Newberger Douglas R. Caldwell OREGON STATE UNIVERSITY LifirtAF, Y MARINE SCIENCE CENTEh OREGON STATE UNIVERSITY NEWPORT, OREGON Office of Naval Research N C-0004 NR College of Oceanography Oregon State University Reference 84-8 March 1984 DATA REPORT 1 Reproduction in whole or part is permitted for any purpose of the United States Government. APR

2 Unclassified SECURI TY CL ASSIFIC A TikON OF T wk IS PAGE (When D Z Entered) REPORT DOCUMENTATION PAGE READ INSTRUCTIONS BEFORE COMPLETING FORM 1 REP OR T NUMBER 2. GOVT ACCISGION I.O. 3. RECIPIENT'S CATALOG NUMBER i 7-E (nnd Subtitte) WAZP OBSERVATIONS DURING MILDEX OCTOBER- NOVEMBER 1983 S. TYPE OF REPORT & PERIOD COVERED Data Report 6. PERFORMING ORG. REPORT NUMBER 7. Au T,,OR(3) Melora M. Park, Michael D. Brown, Thomas M. Dillon, Priscilla A. Newberger, Douglas R. Caldwell 9. PERFORMING ORGANIZATION NAME AND ADDRESS School of Oceanography Oregon State University Corvallis, Oregon I I CONTROLLING OFFICE NAME AND ADDRESS Office of Naval Research Ocean Science & Technology Division Arlington, Virginia a. CONTRACT OR GRANT NUMBER(.) N C-0004 NR PROGRAM ELEMENT, PROJECT, TASK AREA & WORK UNIT NUMBERS 12. REPORT DATE Oct/Nov NUMBER OF PAGES 14. MONITORING AGENCY NAME & ADDRESS(If different front Controlling Office) 15. SECURITY CLASS. (of this report) 2 Unclassified 16, DISTRIBUTION STATEMENT (of this Report) IS., DECLASSIFICATION/ DOWNGRADING SCHEDULE Approved for public release; distribution unlimited 17. DISTRIBUTION STATEMENT (of the abstract entered In Block, if different from Report) IS. SUPPLEMENTARY NOTES 19. KEY WORDS (Continua ors reverse side lf nece eary end identify by block number). ABSTRACT (Continue on re v Ids it nece eary and identify by block number) Profiles of shear, temperature and temperature derivative, and selected profiles of temperature, salinity and sigma-t from WAZP in MILDEX D 1 JAN EDITION OF 1 NOV 65 IS OBSOLETE S/ I Unclassified SECURITY CLASSIFICATION OF THIS PAGE (When Data lintoted)

3 WAZP observations during MILDEX October-November 1983 Melora M. Park Michael D. Brown Thomas M. Dillon Priscilla A. Newberger Douglas R. Caldwell College of Oceanography Oregon State University Corvallis OR 97331

4 ACKNOWLEDGMENTS The authors wish to thank S. Wilcox, who aided in some of the WAZP II electronics construction, and J. Cantey, K. Fischer, and H. Dannelongue, who helped acquire the data at sea. C. Paulson and R. Baumann provided the Seabird salinities and temperatures as well as some shipboard meteorological observations.

5 Table of Contents Acknowledgements I. Cruise report 1 II. WAZP shear profiles a. Tape 13 October b. Tape 14 October c. Tape 16 October d. Tape 17 October P. Tape 30 October f. Tape 31 October g. Tape 32 October h. Tape 33 October 30 3 i. Tape 34 October 30 1 j. Tape 35 October k. Tape November Tape 51 November m. Tape 64 November 152 n. Tape 65 November o. Tape 67 November p. Tape 68 November q. Tape 69 November 13 8 III. WAZP temperature,salinity,sigma T profiles 2

6 1 THE MILDEX EXPERIMENT MILDEX, a mixed layer dynamics experiment, began October 21, 1983 and lasted until November 16, R.P. Flip, R.V. Wecoma and R.V. Acania rendezvoused at 34 N, 127 W to participate in joint observations of the mixed layer and upper ocean. This report contains data from the WAve Zone Profiler, WAZP II, deployed from the R.V. Wecoma. The WAZP II is a vertically rising microstructure profiler with sensors designed to obtain kinetic energy dissipation rates and microstructure information near the sea surface. WAZP II was deployed over block periods during the cruise beginning October 25 and ending November 12, GMT. Work was done in daylight with the ship moving at about 1/2 knot (just enough to maintain heading into the swell). Time between casts was approximately nine minutes, with each drop lasting roughly two minutes. THE INSTRUMENT The WAZP II microstructure probe is 1.7 m long and 5.7 cm in diameter. A nose cone contains 2 airfoil shear sensors (Undersea Technology Inc., Monterey, California), a fast thermistor (Thermometrics model FP07), a solidstate pressure sensor, and a conductivity sensor. Two WAZP II probes were used in MILDEX. Probe #6.83 was equipped with a Neil Brown conductivity sensor, and probe #7.83 had a Michael Head micro-conductivity sensor. The probe body is filled with mineral oil, and pressure is transmitted to the probe interior through a bladder. Inside the probe are batteries, pre-amplifiers, and associated circuitry. Signals are transmitted to a shipboard acquisition system through a data link consisting of 8 pairs of 32 gauge copper wire, a Kevlar core, and a polyurethane sheath. The data link also serves as a recovery line. Drag brushes are installed on the tail of WAZP II to maintain a steady vertical speed. The WAZP II is operated in the rising mode by using toroidal foam buoyancy elements around the probe body. A ballast weight is attached to the recovery line, and the probe is allowed to descend to a chosen depth (usually less than 0 m). The ballast is then released, and the probe buoyantly ascends. The rise speed can be adjusted by changing the buoyancy. During MILDEX, a 55 cm/s rise

7 2 speed was used. The terminal velocity is reached a few meters above the release depth. Normally, the speed (as measured from the pressure) varies by + 5 cm/s over most of the drop. Occasionally, the observed speed was as large as 65 cm/s in MILDEX. Within 1-2 meters of the surface, the speed usually fell to 40- cm/s, perhaps due to the wind-wave field, or possibly due to strong shears very near the surface. On board ship, voltages were amplified, processed, digitized, and recorded on magnetic tape. Digitization was done with a 12-bit ADAC A/D converter controlled by an LSI 11/23 minicomputer. Voltages were digitized at 130 scans per second, each scan consisting of 16 words. In order to increase resolution near the surface, where gradients are small, temperature and conductivity were both independently amplified twice, using different gains and offsets. High gain temperature, low gain temperature, high gain conductivity, and low gain conductivity were filtered at 40 Hz with a 6-pole analog butterworth filter, and were recorded once each scan. Signals from the pressure pre-amplifier were filtered at 2 Hz, and were recorded once per scan. The two shear signals were amplified, differentiated, and filtered at 80 Hz with an eliptic filter. Each shear channel was recorded twice each scan, yielding an effective rate of 2 samples per second. Temperature and conductivity were also electronically differentiated before filtering. The temperature derivative was filtered at 45 Hz with an eliptic filter, and the conductivity derivative was filtered at 240 Hz with an eliptic filter. Temperature derivatives were digitized twice per scan, and the conductivity derivative was digitized 4 times per scan, giving an effective sampling rate of 5 samples per second.

8 J THE DATA This report contains two types of plots. The first type shows low gain temperature, temperature derivative, and shear, as a function of depth, illustrating near surface activity and pinpointing periods of turbulent activity. The data for these plots were averaged over approximately 2 cm. The second type of plot is a profile of temperature, salinity and at, with corresponding units of, parts per thousand, and a units (data averaged over cm). These plots are inoluded for roughly every five drops per tape or at least one near the beginning and one near the end of each working period. Times and dates shown are GMT. Plots of meteorological data, ship position, and various sea surface parameters obtained from bridge observations are at the beginning of the report along with a detailed list of WAZP II drop information. Conductivity comparisons from both units to a flowthrough Seabird, and bottle salinity, indicated a marked shift in sensor calibrations, probably due to contamination of the conductivity sensors. Correction factors were applied to WAZP II conductivity in order to achieve agreement between WAZP II computed salinity and Seabird salinity. The WAZP II temperature measurements agreed well with Seabird temperatures, except the November 11 and 12 sampling periods, where an unknown discrepancy of 0.2 is apparent. This discrepancy has not yet been resolved, and it is not yet known which temperature is in error.

9 CT 23 w NOV 13 CC NOV I 1 I, I 1 I I LONGITUDE CRUISE TRACK RV WECOMA, M I L OEX 1983

10 6 4-0 w 0_ 0 I t t I I OCT NOV OCT NOV WINO SPEED (KNOTS) AND DIRECTION BRIDGE OBSERVATIONS

11 7 11 till I [ II 0 kirrh 1ft 1 1 t AAJA A OCT NOV 18 OCT 25 1 NOV SEA HEIGHT (FEET) AND DIRECTION BRIDGE OBSERVATIONS

12 11111 IIIIIIIII [ tto zo-111,1) OCT NOV 3 Li 180 CE OCT NOV SWELL HEIGHT (FEET) AND DIRECTION BRIDGE OBSERVATIONS

13 GMT KNTS REL GMT DATE INST FORM # LINE # WIND LONG LAT DEPTH TIME TAPE BATCH **********A****A*************A**A*AA***************A***A**A*A****A*****AA** /25 /25 / ABORT ' 52.4' 52.5' 52.2' 52.4' 52.6'.6'.8' 53.2'.3'.4'.4'.4'.4' 49.2'.3'.4'.4'.5'.6'.6'.6'.6'.0'.2'.3'.4'.8'.8'.8' 51.0'.0'.0' ' 42.6' 42.8' 43.0' 42.8' 42.6' 43.0'.3'.3' 44.6'.6'.9'.9' 45.5' 36.9'.9.9'.9'.9'.9' 37.0' 36.9' 37.0'.4'.4'.6'.7'.8'.9'.9' 38.0'.0'.0' :00 :09 : 18:00 :12 :30 :39 19:35 :47 :55 :08 :23 :29 :39 : :58 21:03 :15 :25 23:43 00:00 :02 :16 :25 :37 :46 17:33 :45 :55 18:00 :07 :13 :22 :28 :34 19:45 :31 :38 21:30 :45 :55 22:00 :05 :

14 1 0 GMT KNTS REL GMT DATE INST FORM # LINE # WIND LONG LAT DEPTH TIME TAPE BATCH OcAAAA0cAA*AAAA*AOTA*AAA*A*AAAAA****AAAAAAAAA***A*A**A*************AAAA*AA**AA /26 / '.1'.2'.2'.1'.2'.2'.2'.3'.3'.3' 52.4' 51.8'.7'.6'.5'.4'.3'.2'.1'.0'.8'.7'.6'.5'.5'.3'.2'.1'.0'.0' 49.7'.6'.5'.3' 126.1'.2'.2'.3'.3'.2'.3'.2'.3'.4'.5'.9'.9'.1'.1'.0' 19.8'.6'.4'.4'.1'.0' 18.9'.7'.7'.5'.2'.0' 17.9'.7'.5'.4'.2'.0' 16.9' :24 :30 :37 :35 :47 :55 23:00 :09 :17 :21 :51 18:11 :36 19:00 :09 :18 :26 :34 :41 :49 :56 :04 :12 :23 :33 :38 :46 :54 21:06 :15 :23 :31 :40 :48 :56 22:05 :

15 1 1 GMT KNTS REL GMT DATE INST FORM # LINE # WIND LONG LAT DEPTH TIME TAPE BATCH *****************A***AAAA*******A*******AAAA*A*******A*******AAAAAA***A**** /29 / '.1' 48.9'.7'.7'.5'.4'.3'.2'.0' 47.8'.6' 45.5'.3' 46.8'.6' 44.9'.7'.5'.4'.2'.1'.0' 43.8'.8'.7'.5'.5'.5'.4'.3'.3'.2' 44.5'.4'.3' 54.2'.1'.0'.0' 53.9'.8'.4' 51.9'.8' 126.8'.5'.4'.3'.0'.2.0' 15.9'.8'.7'.6'.4' 17.6'.7' 15.2'.1' 17.5'.4'.6'.5.6'.4'.4'.6'.5'.5'.5'.6'.6'.5'.6'.7'.7' 15.2'.3'.3' 19.5'.6'.7'.8' 19.9'.0' 19.8' 22.2'.2' :22 :30 :38 :48 :55 23:02 :09 :19 :24 :32 :40 :54 00:22 :29 :36 :42 :49 :5? 01:06 :13 :23 :32 :39 :46 :52 :58 02:05 :11 :17 :23 :27 :33 :39 03:03 :04 :21 17:49 18:07 :16 :26 :33 :49 : :23 :32 :

16 12 GMT KNTS REL GMT DATE INST FORM # LINE # WIND LONG LAT DEPTH TIME TAPE BATCH *********A*****************A*****A*A**********A**************A****A******** / '.3' 82 21: '.4' 77 : '.4' 71 : / ' ' 18: '.2' : '.4' : '.4' : : '.4' 55 : 6 4.4'.6' 51 : '.8' 45 : '.8' "55 :35 9.8'.0' : ' 12.6' 55 : '.2' 55 : '.3' 54 : 13 11/ ' ' 90 18: '.8' 40 : ' 8.0' 55 19: '.1' 55 : '.2' : '.7' 55 :17 6.4'.7' 55 :26 7.5'.7' 55 :35 8.6'.9' 55 : '.9' 55 :53 11/ ' 2.8' 75 : : : : ' 2.2' 55 22: '.1' 58 :13 6 : '.2' :46 9.4'.2' :54.5'.1' 23: '.0' 40 : '.0' 55 : ' 1.9' 57 : '.7' : '.8' 57 : '.9' 55 :58 17

17 13 GMT KNTS REL GMT DATE INST FORM # LINE # WIND LONG LAT DEPTH TIME TAPE BATCH ***************AAAA****AAA*A****A*A*****************************A*********/ 11/11 11/ ABORT ABORTED ' 4.8'.7'.7'.6' 44.7'.5' 43.8' 44.7'.7'.6'.6' 43.7' 44.5'.5'.4'.2'.3'.3'.5'.5'.5' 43.7'.7' 44.6'.6'.5'.5'.4'.3'.2'.2'.0'.0' 43.9'.9'.8' ' 1.8' 2.0'.0'.1' 45.9' 46.2'.7'.0'.0'.0' 45.9' 46.5' 45.8'.9'.9'.8'.8'.9' 46.0'.2'.3' 47.1'.2' 46.6'.7'.8'.9'.9' 47.0'.2'.3'.6'.7' 48.1'.4'.5' : : :32 :42 :51 :58 01:06 :26 :35 :43 : 16:53 17:01 : :19 :29 :36 :45 :55 18:05 :14 :41 :52 :59 19:07 :34 :45 :57 :07 :19 :31 :52 21:05 :15 :28 :44 22:06 :19 :40 :49 :56 23:06 :15 :34 :

18 14 GMT KNTS REL GMT DATE INST FORM # LINE # WIND LONG LAT DEPTH TIME TAPE BATCH *A***A**A****A********A*****AA**A************A********A*****************A** 11/ ' ABORTED ' 15.8' 12.7' 11.7'.7' ' ' 12.9'.9' 44.0' 49.7' 82.0' 68.3' 62.4' 59.8' 65.2' 58.6' ' 67.2' 67.4' '1 1 00:05 :13 :23 :30 :37 :48 01:08 :30 :43 : :59 02:08 :30 :38 : :

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211 9 13 NOV-83 00:13 TAPE 69 FILE

212 13 NOV-83 00:23 2 TAPE 69 FILE cn L

213 MOM 13 NOV 83 00: TAPE 69 FILES (r) 3 30 I- L

214 13 NOV-83 00: TAPE 69 FILE 7 n cr) 30 z 1 E-140 SO MM

215 13-NOV-83 01: TAPE 69 FILE am

216 13 NOV-83 01: TAPE 69 FILE

217 13-NOV-83 01: TAPE 69 FILE

218 13-NOV-83 01: 216 TAPE 69 FILE

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220 13-NOV-83 02: TAPE 69 FILE 13 U, 3 30 W

221 219

222 25-OCT-83 17: 2 0 TEMP, SALINITY, SIGMA T TAPE 13 NEIL BROWN SENSOR FILE 3

223 25-OCT-83,9: TEMP, SALINITY, SIGMA T TAPE 13 NEIL BROWN SENSOR FILE z J

224 25-OCT-83 : TEMP, SALINITY, SIGMA T NEIL BROWN SENSOR TAPE 14- FILE 2 T, J I I I I I 1 _L I I

225 26-OCT 83 18: TEMP, SALINITY, SIGMA T NEIL BROWN SENSOR TAPE 16 FILE 7 (1) EL; M

226 26-OCT-83 : TEMP, SALINITY, SIGMA T MICROCONDUCTIVITY TAPE 16 FILE 12 J. 1 0 E 30 Pi;

227 26 OCT-83 21: TEMP, SALINITY, SIGMA T NEIL BROWN SENSOR TAPE 16 FILE cn E 30 W 40 nn I I I L I t I I I

228 26-OCT-83 22: TEMP, SALINITY, SIGMA T NEIL BROWN SENSOR TAPE 17 FILE ; I I I 1 ' ' ' I

229 26-OCT-83 23: TEMP, SALINITY, SIGMA T NEIL BROWN SENSOR TAPE 17 FILE 9 Er, 30 w I

230 29-OCT-83 19: TEMP, SALINITY, SIGMA T TAPE 30 MICROCONDUCTIVITY FILE 3

231 29-OCT-83 21: TEMP, SALINITY, SIGMA T TAPE 31 MICROCONDUCTIVITY FILE U) IT 30 c)

232 29-OCT-83 22: TEMP, SALINITY, SIGMA T TAPE 31 MICROCONDUCTIVITY FILE 13

233 29 OCT-83 23: TEMP, SALINITY, SIGMA T MICROCONOUCTIVITY 0 1 TAPE 32 FILE 1 0 U) cu I I I t I

234 30 OCT-83 01:23 2 3? TEMP, SALINITY, SIGMA T MICROCONDUCTIVITY TAPE 33 FILE le FA; 30 E 1 E1, e

235 30-OCT-83 03: TEMP, SALINITY, SIGMA T NEIL BROWN SENSOR

236 30-OCT-83 18: TEMP, SALINITY, SIGMA T TAPE 34 NEIL BROWN SENSOR FILE

237 30 OCT-83 : TEMP, SALINITY, SIGMA T TAPE 34- MICROCONOUCTIVITY FILE

238 30-OCT-83 21: 2 36 TEMP, SALINITY, SIGMA T TAPE 35 MICROCONDUCTIVITY FILE 11

239 3 NOV-83 18: TEMP, SALINITY, SIGMA T NEIL BROWN SENSOR 0 I I TAPE FILE 2 cn LT., 30 b- e;

240 238 3-NOV-83 19:53 TEMP, SALINITY, SIGMA T NEIL BROWN SENSOR TAPE FILE U) F.L1 30 F- U.1 al 40 am= i 1 i, n I I I

241 4-NOV-83 18: TEMP, SALINITY, SIGMA T TAPE 51 NEIL BROWN SENSOR FILE 1

242 4-NOV-83 :45 0 TEMP, SALINITY, SIGMA T TAPE 51 NEIL BROWN SENSOR FILE 9 I 1 0 ow. =MN Lcri

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244 -NOV-83 22: TEMP, SALINITY, SIGMA T TAPE 64 NEIL BROWN SENSOR FILE 9 t I 1 0 U) cu5 30 E.b

245 -NOV-83 23:43 24'.; 0 TEMP, SALINITY, SIGMA T TAPE 64 NEIL BROWN SENSOR FILE MEM c.f) LT, 30 F al 4.0 4n1,i i

246 12-NOV-83 17: TEMP, SALINITY, SIGMA T NEIL BROWN SENSOR TAPE 67 FILE , 1, I I

247 12 NOV-83 18: TEMP, SALINITY, SIGMA T TAPE 67 NEIL BROWN SENSOR FILE t 1 t I Y cir 1 I I

248 12-NOV-83 19: TEMP, SALINITY, SIGMA T MICROCONDUCTIVITY I I I I 1 TAPE 67 FILE 16 U) 3 30 I Eli It 0 OEM 1 I I I I I I

249 12-NOV-83 : TEMP, SALINITY, SIGMA T MICROCONDUCTIVITY TAPE 68 FILE 3 a OEM U) 30 EL

250 NOV-83 22:40 0 TEMP, SALINITY, SIGMA T NEIL BROWN SENSOR TAPE 68 FILE SO is2 1 I. I vj,

251 13-NOV-83 00: TEMP, SALINITY, SIGMA T TAPE 69 MICROCONOUCTIVITY FILE 3 E 30 F- LU W 4-0 D

252 2 13-NOV-83 01:43 TEMP, SALINITY, SIGMA T MICROCONDUCTIVITY 0 P TAPE 69 FILE I ' I ' ' I ' ' '