NOAA ESRL PSD rean20thcent V2 six-hourly monolevel eatm selection

You can interactively pick out the data you would like with the Data Viewer.

Otherwise choose the variable you would like to select data from:

• 6-hourly Cloud Water for entire atmosphere
• 6-hourly Precipitable Water for entire atmosphere
• 6-hourly Total Columnar Ozone