  1/4 degree Gulf of Mexico Climatologies at extended depths.

 [Please note that the climatological fields detailed here are
  being released as an experimental version to help with the tracking
  and understanding the effects of the Deepwater Horizon oil spill.  The
  fields have not been fully quality controlled and may contain
  erroneous values.]

 Using data from the "World Ocean Database 2009" (WOD09,
http://www.nodc.noaa.gov/OC5/WOD/pr_wod.html) and the procedures
outlined for the World Ocean Atlas 2009 (WOA09,
http://www.nodc.noaa.gov/OC5/WOA09/pr_woa09.html) climatologies of
temperature (deg C), salinity (PSS-78), oxygen (ml/l) and sigma-theta
(potential density with respect to the surface -1000, kg/m^3) were
calculated for the Gulf of Mexico (100W-80W, 16N-35N) on a 1/4 degree
longitude/latitude grid for the annual, seasonal
(winter=January-March), and monthly compositing time periods.  The
climatologies are the "all" climatologies, meaning all data,
regardless of year were used, including for temperature and salinity.
102 standard depths were used, as follows:
  depth(m)[n] = { 0, 5, 10, 15, 20, 25, 30, 35, 40, 45, 50, 55, 60,
                 65, 70, 75, 80, 85, 90, 95, 100, 125, 150, 175,
                200, 225, 250, 275, 300, 325, 350, 375, 400, 425,
                450, 475, 500, 550, 600, 650, 700, 750, 800, 850,
                900, 950, 1000, 1050, 1100, 1150, 1200, 1250, 1300,
               1350, 1400, 1450, 1500, 1550, 1600, 1650, 1700, 1750,
               1800, 1850, 1900, 1950, 2000, 2100, 2200, 2300, 2400,
               2500, 2600, 2700, 2800, 2900, 3000, 3100, 3200, 3300,
               3400, 3500, 3600, 3700, 3800, 3900, 4000, 4100, 4200,
               4300, 4400, 4500, 4600, 4700, 4800, 4900, 5000, 5100,
               5200, 5300, 5400, 5500 };

 where n=1 to 102.

 The files are arranged as follows: VTT.csv

 where V=variable: t=temperature, s=salinity, o=oxygen, d=sigma-0
 TT=time period (00=annual, 13=Winter (January-March),
 14=Spring (April-June), 15=Summer (July-September),
 16=Fall (October-December), 01-12=Month)
 example t12=December temperature

 The files are comma separated value (csv) files.  The first line
 contains a header.  The following lines contain
 latitude,longitude,followed by climatological mean value for each depth
 from the surface to the ocean bottom.  The ocean bottom is the nearest
 (shallower) standard depth level to the mean depth of each 1/4 degree square
 as calculated from the ETOPO2 bathymetry.

