There are 4 files containing Dome C temperature data from the summer
of 2004/05.  Surface temperatures are brightness temperatures in the
8-14 micron band, measured by a Heitronics KT-19.82 infrared
thermometer mounted 30 meters above the surface and looking toward the
surface at a 45 degree angle from nadir.  The 2- and 30-meter air
temperatures were measured with YSI-44033 high-precision thermistors
in ventilated shields.  The two thermistors agreed to within
+/-0.03 K in a side-by-side comparison at ambient temperature.  Times
in all files are given in local standard time, GMT+8.

For more information on the data see:  Hudson, S.R. and R.E. Brandt,
2005: A Look at the Surface-Based Temperature Inversion on the
Antarctic Plateau. J. Climate, 18, 1673-96.

Contact hudson@atmos.washington.edu with questions.

Below is a description of each file.

Summer0405_DCTemperatures.txt
  This 5 MB text file contains the temperature data and corresponding
  time variables measured every 2 minutes for most of the record.  The
  file is a space-delimited text file with 11 fixed-width columns.
  All values are written as floating point numbers with the format
  %14.7e, i.e. -#.#######e+##, where the sign of the number is
  included only for negative numbers, while the sign of the exponent
  is included whether positive or negative.

  Column 1 contains the month in which the measurement was made.  12
  indicates December 2004 and 1 indicated January 2005.

  Column 2 contains the day of the month on which the measurement was
  made.

  Column 3 contains the hour of the day (0-23) when the measurement
  was made, LST, GMT+8.

  Column 4 contains the minute of the hour when the measurement was
  made.

  Column 5 contains the second of the minute when the measurement was
  made.

  Column 6 contains the time of day when the measurement was made, in
  the form of a decimal hour (0-23.999999).  This is
  Col3+Col4/60+Col5/3600.

  Column 7 contains a continuously increasing time variable that is a
  sort of decimal Julian day of 2005.  The value 1.0 corresponds to
  00:00 LST 1 January 2005, -1.5 is 12:00 LST 29 December 2005.

  Column 8 contains the surface brightness temperature in degrees
  Celsius.

  Column 9 contains the 2-meter air temperature in degrees Celsius.

  Column 10 contains the 30-meter air temperature in degrees Celsius.

  Column 11 contains the temperature inside the heated box in which
  the KT19 infrared thermometer was mounted in degrees Celsius.

Summer0405_DCTemperatures.mat
  This 792 kB binary file contains all of the same data as
  Summer0405_DCTemperatures.txt, but stored as a Matlab data file.  It
  also has the half-hourly mean temperatures, which were published in
  the paper listed above.
  The variables are:

  month = Column 1 above
  day = Column 2 above
  hr = Column 3 above
  mins = Column 4 above
  sec = Column 5 above
  time = Column 6 above
  jday = Column 7 above
  temps(:,1) = Column 8 above
  temps(:,2) = Column 9 above
  temps(:,3) = Column 10 above
  temps(:,4) = Column 11 above
  meanT = mean of all temperatures measured during the summer within
  +/-15 minutes of the times given in meanTime.  They are given in the
  same column order as in temps.
  meanTime = times corresponding to meanT.

Summer0405_DCTMeans.txt
  This 4.1 kB text file contains the half-hourly mean temperatures
  that were published in the paper above.  The file is a
  space-delimited text file with 5 fixed-width columns.  All values
  are written as floating point numbers with the format %14.7e,
  i.e. -#.#######e+##, where the sign of the number is included only
  for negative numbers, while the sign of the exponent is included
  whether positive or negative.

  Column 1 contains the local time of day as a decimal hour (GMT+8)
  corresponding to the following temperatures.  The temperatures that
  follow are means of all of the data available from the summer for
  that particular temperature that were collected within +/-15 minutes
  of the time of day given here.

  Column 2 contains the surface brightness temperature means in
  degrees Celsius.

  Column 3 contains the 2-meter air temperature means in degrees
  Celsius.

  Column 4 contains the 30-meter air temperature means in degrees
  Celsius.

  Column 5 contains the means of the temperatures inside the heated
  box in which the KT19 infrared thermometer was mounted in degrees
  Celsius. 

Summer0405_DCTMeans.mat
  This 1.9 kB binary file contains the same data as
  Summer0405_DCTMeans.txt, but stored as a Matlab data file.  The
  variables are:

  meanTime = Column 1 in Summer0405_DCTMeans.txt.
  meanT(:,1) = Column 2 in Summer0405_DCTMeans.txt.
  meanT(:,2) = Column 3 in Summer0405_DCTMeans.txt.
  meanT(:,3) = Column 4 in Summer0405_DCTMeans.txt.
  meanT(:,4) = Column 5 in Summer0405_DCTMeans.txt.