A small hole was drilled in the McMurdo Sound fast ice. The CTD was deployed below the fast ice to ~ 2 m depth. The CTD was then powered on and allowed to sit a few minutes until the pumps turned on and sensors stabilized and equilibrated. The CTD was then lowered using a hand winch to depths between 97 and 175 m.
This dataset includes temperature, salinity, conductivity, oxygen, depth, sound velocity, chlorophyll fluorescence, and pH measurements from McMurdo Sound, Antarctica. \u00a0Data were collected by CTD, fluorescence, and pH sensors during austral years 2012/2013 and 2014/2015
These data are not quality controlled.\u00a0 The oxygen sensor failed at some point during both 2012 and 2014. The conductivity sensor calibrations did not show significant drift, however, a bad cable in 2014 likely caused intermittent data spikes.
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There are no fluorescence values in these data for 2012 and the beginning of 2014. \u00a0The first station with fluorescence is station 108 in 2014. \u00a0There are no pH values in the 2014 data.
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Raw data were saved as hex files and converted to 1 m bin averaged data using the Sea-Bird Electronics Inc. Data Processing Software v.7.23.1. \u00a0For calibration and instrument information\u00a0please consult the\u00a0CTD\u00a0header files (ZIP, 131 files,\u00a0440 KB total). The header files contain header lines generated by Sea-Bird processing software for each cast.
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The \"Parameter\" section of this dataset landing page provides the data parameter names currently used in this data version as well as the original name used in the Sea-Bird Data Processing Software.
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BCO-DMO Data Manager Processing Notes:
\n* added a conventional header with dataset name, PI name, version date
\n* modified parameter names to conform with BCO-DMO naming conventions
\n* blank values replaced with no data value 'nd'
\n* data from Jan 02 2013 15:00 had some trailing commas and/or extra values at end of lines (0.0). \u00a0Characters after the last comma were removed.
\n* v0 Voltage 0 was duplicated with same variable name, values, and description. \u00a0Removed second instance
\n* For station 212, austral season 2014 the time was in elapsed seconds so added the time in hh:mm instead to match other files. \u00a0Got the time from a date time string column (timeJ) in the original file.
\n* Date format converted to ISO Date format (source timeJ)
\n* Data version 2017-05-04 is an update of version 2017-02-08 that includes variable name changes in the data and a timestamp change from local to UTC. \u00a0Time and date now called time_local, date_local. \u00a0Other variables are now more descriptive for example \"depSM\" is now \"depth.\" \u00a0Added time zone offset parameter.
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