Spin Up
                                   ---- --

The plans for Reanalysis are to produce new analysis for the 195x to 1994.
(After 1995 and onwards will be covered by CDAS).  For practical 
considerations, the first year of Reanalysis completed was 1985 and not 
195x.  The easier years are likely to provide valuable experience which can 
be applied to the more difficult years.  In addition, the later years can be
compared with both operational and other reanalysis efforts which is very
helpful finding problems.

The problem with running the Reanalysis in sections is the "joints".  For
example, in January 1, 1985 00Z, there will be a discontinuity.  The
discontinuity will be small for atmospheric quantities because the first
section of the reanalysis started at the beginning of December 1984, allowing
one month to 'spin-up' the system.  (Upper stratospheric moisture may take 
longer to spin up as it is not well observed and moisture residence time
is relatively long.)   However, experience from the AMIP simulations is 
that a month is too short, and perhaps 1 year is need to spin-up the soil 
moisture.

In summary, don't be surprised to see a discontinuity in the soil moisture
and related fields (evaporation and perhaps surface temperature) at the 
"joints" where Reanalysis sections are put together.