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

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.
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