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ACE-FTS climatology - CO, HCN, C2H6 and C2H2
                    - supplement material to Park et al. [2013]

					           		 2013 Mijeong Park

This document provides brief description of the ACE-FTS climatology data used in 
Park et al. [2013]. For more details, see Park et al. [2013] or contact mijeong@ucar.edu.

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1. Each NetCDF file contains seasonal average volume mixing ratios of CO, HCN,C2H6 and C2H2
   (version 3) averaged from 2004 to 2010 in ppbv units.
2. Data screening process used for each species is explained in detail in Park et al. [2013].
3. The data is written in NetCDF format in longitude/latitude/altitude grids (3D).
   The longitude and latitude given in the file indicate center of the grid boxes covering
   the globe (0-360, 90S-90N). The altitude covers from 0.5 to 149.5 km, which is identical
   to 1-km grid of ACE-FTS profiles.
4. Missing data is marked as -999.9.

Park, M., W. J. Randel, D. E. Kinnison, L. K. Emmons, P. F. Bernath, K. A. Walker,
          C. D. Boone, and N. J. Livesey (2013), Hydrocarbons in the upper troposphere
          and lower stratosphere observed from ACE-FTS and comparisons with WACCM,
          J. Geophys. Res. Atmos., 118, doi:10.1029/2012JD018327.

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