These data were developed at CICS/ESSIC.  This file briefly describes the
analysis and tells how to read the data.  Questions or comments about the
data should be addressed to Tom.Smith@noaa.gov.  Constructive feedback
about the analysis, its uses and limitations, and suggestions for
improvements are also welcome.

Data: historical reconstructed precipitation anomalies.  Merged analyses 
are used to produce the data.  The EOF-based reconstruction is used over 
land.  Over oceans the EOF-based reconstruction is bias adjusted so that 
its multi-decadal signal matched the CCA-based reconstruction multi-decadal signal.  The anomalies are recentered so that their average is zero for 
the 1981-1990 base period.

File: recg.bias.adj.blend.ascii.dat

Grid: 5-deg latitude by longitude.  The 72 longitudes are centered on
2.5E (i=1) to 357.5E (i=72).  The 36 latitudes are centered on 87.5S (j=1)
to 87.5N (j=36).  The polar latitudes are not analyzed and are filled
with special values (-99999) to mark them.

Data are written as integers.  To extract the data and convert the values 
to mm/mon, use the following code:

c    67  1         2         3         4         5         6         7 2
      parameter(im=72,jm=36,iyr1=1900,iyr2=2008)
      real a2(im,jm)
      integer ia2(jm)
c
c* Open the input data file.
      open(21,file='recg.bias.adj.blend.ascii.dat')
c
c* Convert the real numbers to ascii text to real numbers (mm/mon).
      do iy=iyr1,iyr2
       do mon=1,12
c* Read in the year and month for each month in the record.
        read(21,90) iyr,monr
c* Read in the data as ascii mm/mon x 100 and convert to real mm/mon.
c* Regions with no data at high latitudes are marked -99999 in ascii,
c* and converted to -999.99 in real numbers.
        do i=1,im
         read(21,91) (ia2(j),j=1,jm)
         do j=1,jm
          a2(i,j)=real(ia2(j))/100.0
         end do
        end do
c* Data are now in array a2(i,j).



c* End loop over months.
       end do
c* End loop over years.
      end do
c
      stop
 90   format(2i7)
 91   format(36i7)
      end