AIDJEX Bulletin #40 - Polar Science Center - University of Washington

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19. Surface pressure (Val i dated) , AIDJEX camps and selected buoys NavSat systems at the four manned camps and nine NavSat buoys had pressure sensors to make detailed measurements not specifically included in the surface pressure charts of file 11 above. After appropriate corrections and calibration, these validated measurements were incorporated into the derivation of area-wide geostrophic winds (file 10). These source data are available with their geographic position at 3-hour intervals. Data are sorted by station. The manned camps were operational from April 1975 to April 1976. Some of the buoys (supplemented by nearby RAMS buoys) continued to operate as late as 6 December 1976. These data are also incorporated in the alternative pressure position file noted in data set 9 above. 20. Weather observations , manned camps Handwritten weather notes logged daily by observers in the manned camps noted wind velocity, surface pressure, temperature, visibility, and weather. They back up the digitized data in the files noted above. 21. Logbook entries, manned camps Members of the scientific groups recorded informal notes about events, equipment performance, changes or calibration of sensors, etc. Their logbooks back up the data collection procedures followed during the main experiment. 22. Wind speed and direction measured by pilot balloon Pibal measurements using two tarcking theodolites were made each day at the main camp during the AIDJEX experiment. Two generations of data are stored in the data bank. Raw data consist of theodolite (angle) measurements taken at uniform intervals of time as the balloon ascended. Drag output (processed profiles) give zonal (to the west) and meridional (to the north) velocity components versus altitude. These data cover the period 10 April 1975 to 20 April 1976 at the main camps. 23. Profi 1 ing current meter Twice a day at each manned camp, a current meter was lowered to a depth of 194 m and raised at a steady rate to determine the stratification of the ocean currents. The analog outputs were digitized to show depth, speed and direction at uniform depth increments. The data bank has received 300 casts from Caribou, 406 casts from Big Bear, 654 casts from Blue Fox, and 687 casts from Snow Bird-- 2047 casts in all to date (10 January 1978). Note that a cast may either be descending (mode 1) or ascending (mode 2). Each station usually has two casts, one of each mode. Optimally, then, there are four casts (two stations) per day per camp. 195
24. Salinity and temperature versus depth at manned camps Standard STD measurements were made twice a day at each manned camp duriing the main experiment. As of 29 December 1977 the data bank received 581 casts distributed among the four manned camps. Time periods vary. 25. Speci fi c humi di ty Hourly averages of vapor pressure, mixing ratio g/g, and specific humidity g/g are derived from measured dewpoint and atmospheric pressure at the main camps during the entire AIDJEX program. 26. Under-ice profile (subicex 1-76) Up-looking sonar was used to measure sea ice thickness in the Beaufort Sea in April 1976. A submarine track traversed the AIDJEX area centered on earibou. Tape 1 contains data obtained on a northward track from 7OoN to 75ON, a distance of 290 nautical miles. Then on a southeast track (135 degrees clockwise) to about 72.5O'M, a distance of about 195 nautical miles, data were acquired for tape 2. Tape 3 contains data from the westward track, 290 nautical miles along 72.5ON. The tapes are 7-trackY odd parity, 556bpi. They are composed of fixed length binary coded decimal records. The data include periodic geographic location, distance between sonar soundings (inversely related to speed) and surface beam diameter inversely related to depth followed by the successive distances between the under-ice surface and the calculated water surface at each sounding point along the track. Soundings are mostly about 5 feet apart along the track. A histogram is included showing number of soundings at 1-foot intervals for each more or less 10,000 feet of track. Available tapes are written in three forms: EBSIDIC, SCOPE BCD, and SCOPE Internal Display code. The first is the original form, the second is SCOPE compatible, and the third is in English. 27. Ocean tilt, J. R. Weber, DEMR, Canada Data were obtained at Caribou during the period 11-22 April 1976 (AIDJEX days 467-488). Ocean tilt is given in microradians every 3-5 minutes. 28. Atmospheric boundary layer profile Data from 23 flights of an instrumented package used during February 1976 at Caribou. Measurements of wind speed, wind direction, temperature, and air pressure versus height (and time) are given. 29. Profiles of wind and temperature, spectral analysis Mean wind speed, wind direction, and temperature profiles collected at Big Bear in spring 1975 and at Caribou in spring 1976 from a 25 m tower, Experiment details are given in ADIJEX Bulletin No. 36 (May 1977) , pp. 157-174. NISSI data collected at 3 m and 20 m heights are included. It represents the variance of the wind speed signal in the range 0.2-1.0 Hz. 196
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DATA BUOYS AIDJEX BULLETIN No. 40 J
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NOTE TO FRIENDS, AND BYSTANDERS . .
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SUMMARY OF TECHNICAL DEVELOPMENTS I
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milestones, kept the vendor working
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The scene during deployment of HF-N
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The initial AIDJEX scientific plan
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poizr-orbiting satellite, which is
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t@ the spacecraft during each orbit
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BUOY NAHE COMMUN. COMMANDS FIXES TA
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L( 0 I 2 3 4 3 Radial error, kilome
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The buoy will be subjected to tempe
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nics occupy about 12 feet of the 17
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Ill -- - KEY AIUJEX WIN WW AEBa 0 4
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event that a melt pond should form
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chute supplied by Paranetics Inc. i
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6'" IqORGANIC LITHIUM BP.TTEI?Y IMP
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OM (AD RAMS) UREMEN~ \ AIRDROP N m
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provides a grid from which geostrop
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words; a four-bit air temperature w
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PERFORMANCE OF MET/OCEAN BUOYS IN A
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Sensor samples were taken every thr
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strengths are known, were used with
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the ice (causing reduced shear). An
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(McPhee, Mangum, and Martin) , TABL
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70°N 75'N n 3 P 17OOW (D Y 170°W
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12OOW * U Station 25. Xeasurements
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(McPhee , Mangum, and Martin) 2701
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(McPhee, Mangum, and Martin) a 0 a
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"i BUOY 4 I 43 360- 309- 257 206 15
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a30gl 251 I 60 511 r 43 BUOY 4 I
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n 4, (McPhee, Mangum, and Martin) 8
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(McPhee, Mangum, and Martin) 33 W c
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. '-,..I.. . B A R R O W W I N D S
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:
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I 25 23 t h--:!li[ NCI PiHCEl4l 22
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.5 .4 .3 0 A R 2 R 0 W J - 0 B U -
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9 1.5 1.0 c 8 w .5 R 930 $ 565 1000
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Clock corrections were applied rout
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Q) u o z z i 4- 4- Z + + z f n 9 Ef
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TABLE 1 DIFFERENCES IN DAILY TEMPER
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Laboratory calibration of the ADRAM
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3.20- - 1 t W o? 2 3.051 ...:-.;..
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POSITION MEASUREMENTS OF AIDJEX MAN
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some redundancy. Four points were u
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75.5 75.: - E75.1 LLI % y75.c - 1 1
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The translocation principle removes
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POSITION ACCURACY To evaluate the q
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TABLE 1 STAND-ALONE ACCURACY 68th P
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Az i mu t h s When both receivers a
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DATA PROCESSING Following the field
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model ice motion in the statistical
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FREC 1 INCY / DOPPLER / FREQUENCY /
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35 30 25 v) > 0 2 20 LL 0 r= E m 15
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An example of a large-scale buoy ar
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observations are needed in remote a
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useful for determining how various
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as well as velocity fields, we must
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Since small changes in the yield su
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The transformation of the system of
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e able to judge how well such a mod
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then the flow rule becomes Q = +A -
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[-B' -F Finally, we eliminate Carte
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differential equation. 2. Discontin
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Substituting (36) and (37) into (34
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arbitrarily assign the values of 1
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The special case when advection can
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TABLE 1 STRETCHING, STRESS, ASP CHA
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ate of deformation, we have normali
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CHARACTERISTIC EQUATIONS The ordina
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One way to circumvent the problems
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The equations governing solutions a
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It is readily seen that when body f
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Page 152 and 153: Courant, R., and D. Hilbert. 1962.
Page 154 and 155: A RESEARCH PLAN TO TEST THE AIDJEX
Page 156 and 157: the barges managed to reach their d
Page 158 and 159: APPROACH A baseline simulation 0-f
Page 160 and 161: SENSITIVITY OF ICE RESPONSE TO DIFF
Page 162 and 163: Since free drift of ice is computed
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Page 170 and 171: TABLE 1 COMPARISON OF ESTIMATED ERR
Page 172 and 173: a) Base line b) 24-hour prediction
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Page 180 and 181: \ / a) Base line b) 24-hour predict
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Page 186 and 187: ) 24-hour prediction c) 36-hour pre
Page 190 and 191: 8 Figure 17. AIDJEX surface pressur
Page 192 and 193: APPENDIX 1 AIDJEX DATA FILES 1. Pos
Page 194 and 195: 9A. Surface-1 eve1 ai r pressure (d
Page 198 and 199: APPENDIX 2 AIDJEX DATA TRANSFERRED
Page 200 and 201: I -7-71327GEO A Cards (continued) 7
Page 202: B Cards (continued) 201
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AIDJEX Bulletin #40 - Polar Science Center - University of Washington

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