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Radiosonde data from the Atmospheric Chemistry Group field projects are available in two main formats. The raw data are available as a compressed file (in either tar-gzip, or pkzip compression) that when decompressed contains one ASCII file per profile of the raw data from the sounding. Each data set also contains a index, or a read-me file that gives the starting positions and starting or nominal time/date of launch.
The netCDF format contains data that has been interpolated onto a standard,
125m vertical grid. The interpolation involved fitting all data points
within a 250m interval to a second degree polynomial, and solving for the
fitted value at the even 125m center altitude. The netCDF files are used
by this web server to generated the contour plots 'on-the-fly'. The netCDF
format is explained in great detail at the netCDF
homepage.
Please Note: Starting with the NEAQS 2004 project the radiosonde data have
been interpolated onto a standard 50 meter grid.
Each project contains raw data in one tar-gzip and one pkzip file (both contain identical data sets. Each project also includes one or more netCDF files. Each project has at a minimum one netCDF file with altitude and time axes. Some of the projects had sections that went predominately North-South; for these a netCDF file with altitude and latitude as the axes may be available.
Please note: In Netscape or Internet Explorer you may "shift" click or "right click"
to download the file (link) to your local disk.
Radiosonde Data for DYNAMO is not yet available
U.S.Dept of Commerce / NOAA / OAR / PMEL / Atmospheric Chemistry