Data Corrections

Although quality control procedures are routinely followed during the transformation of raw data to data products disseminated through this web site or by special request from the program office, subsequent corrections are sometimes necessary. The table below provides brief descriptions of some of these changes. The absence of information regarding a given site and time period is not an indication that no change has been made. Only the most serious errors which affect substantial amounts of data are given here. Changes can potentially impact multiple data products derived from the affected data. Users concerned about the effects of changes on their studies are encouraged to download data periodically to ensure the currency of their files. Users may also contact our staff for further information.

Last Update: August 21, 2015

Data Correction Descriptions