The ESRL website will be unavailable for 24 hours starting Friday, March 6th at 5:00pm MT due to building maintenance.
Display and Analysis Web Pages for PSD Climate Data
By selecting the various options, you will get a list of subset of the PSD webpages that match your analysis criteria.
I didn't use a database to construct the table. Hence, you will sometimes get pages returned that will not be able to do what you requested. For example, asking for pre 1948 data and NCEP operational data will return the search and plot page. The page plots both since it plots many datasets but there is no operational data before 1948. All pages that match part of youur criteria will be returned, however. We will work on this problem.