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\f0\fs24 \cf0 oso07-08Notes.txt\
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These notes were finalized on May 3, 2012 by Sharon Stammerjohn (sharon.stammerjohn@colorado.edu)\
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This directory contains the final post-cruise corrected CTD sensor data from the IB Oden cruise to the Amundsen and Ross Seas,  3 December 2007 to 3 January 2008 (cruise name:  oso07-08).\
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On oso07-08, the CTD sensor package included SBE pressure, dual temperature/conductivity and dual dissolved oxygen.  Sensors were pre and post-cruise calibrated by SeaBird.  Post-cruise corrections were made based on post-cruise calibrations using standard SeaBird protocols.  In the case of oxygen, an additional correction was made based on best fit to the oxygen titrated data.  For T/C/O2 dual sensor data, the secondary sensor data were deemed the most stable and are published here.\
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The final cast data include only the upcast (except for Cast 11; see list below).  This choice was necessary given the noisy or unreliable data on the downcasts.  The bad downcast data were related to the difficult deployment conditions on the IB Oden.  The CTD package was housed in a van on the bow of the ship (one deck above the waterline) and wheeled out to the A-frame for deployment.  This was often a lengthy and cold operation, not ideal conditions for the conductivity and oxygen sensors in particular.  Thus, it would often take the first 10s or 100s of meters for the sensors to stabilize before reliable data were obtained.  If time had not been an issue, we would have preferred a deep soak (e.g., at 100m) and then commencing the full cast from near surface.  But this was not possible, given the short length of the cruise and the many other sampling demands.\
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We also note that there were 3 different CTD configurations used during oso07-08, and their naming convention was as follows (as listed in the file called, oso07-08CTDlog.csv):\
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CNV:  Conventional CTD (w/Oxygen Senors to 2000m)\
CNVV:  Conventional CTD w/ VPR (only to 1000m)\
TMC:  Trace Metal Clean CTD  to ~780m (w/ Fluorescence, Transmissometer)\
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Unfortunately, the TMC package was lost at sea just before Cast 54.  (See CTD log for full cast list.) Therefore, those data could not be post-cruise corrected, so they are not published here.  Thus, the cast numbers up to Cast 54 are not continuous, because the missing cast numbers were the TMC casts.  However, the TMC casts were almost always taken in the same locations as the 'conventional' CTD casts, thus they duplicate the spatial sampling presented here. Finally, the UTC date, time and lat/lon listed in the CTD log file are for the start of each cast.\
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Below is a list of additional bad data removed from some of the casts.\
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Cast11\
- downcast only (erroneous data for entire upcast); spikes at 1-4m; removed\
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Cast12\
- spike in salinity (too low) and oxygen (too high) at 1-2 m; removed\
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Cast39\
- spike in salinity (too low) and oxygen (too high) at 3m; removed\
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Cast43\
-spikes in oxygen at 1m; removed\
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Cast47\
- spike in oxygen (too low) at 1-4m; removed\
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Cast51\
-spikes in oxygen at 1m; removed\
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Cast65\
-spikes in oxygen at 1-3m; removed\
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Cast66\
-spikes in oxygen at 1-2m; removed\
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Cast67\
-spikes in oxygen at 1m; removed
\b \

\b0 \
Cast68\
-spikes at 4-5m; removed\
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Cast70\
- spike in oxygen (too low) at 1m; removed\
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Cast71\
-spikes in oxygen at 1m; removed\
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Cast73\
-spikes in oxygen at 1m; removed\
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}