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NCEP/NCAR Reanalysis (CDAS) is run in real time. Since the other
sources of Reanalysis data (CDC, NCAR, NCDC) may not be able provide
the data in a timely manner, a subset of the current CDAS data is
available by the Internet.
The subset includes monthly and daily averages of many standard
pressure-level data and surface flux quantities. We expect (but do not
promise) that the historical archives will be updated by the
fifth of the month for the preceding month. The rotating archives
will contain the latest analyses and is usually updated a few
days after the fact.
On-line Access to the Data
We as well some other groups (ex. CDC, NCAR, IRI) make some of the
data available on-line. Our web facilities allow you to
(1) make plots, (2) obtain time series of a box average,
(3) obtain subsets of the GRIB fields and (4) FTP access
to many of the GRIB fields. We have the historical 4x daily data
and monthly mean data. We also have a rotating archives of the
4x daily and daily means from the latest analyses (a few day delay).
All the data can be obtained from
The CDAS data is in GRIB, and problems with reading GRIB files are history.
Problems: contact Wei.Shi@noaa.gov or Wesley.Ebisuzaki@noaa.gov