JISAO data
Global Precipitation Climatology Project (GPCP) precipitation
merged precipitation for 1979 - 2010, version 2.2
rain gauge component for 1979 - 2010 



Introduction | Data | 
Analyses













This data set was obtained from the NASA Goddard Space Flight Center
.  The version 2.2 data combines precipitation estimates from
Special Sensor Microwave Imager (SSM/I) emission and
scattering algorithms, GOES Precipitation Index (GPI),
Outgoing Longwave precipitation Index (OPI), rain gauges,
and TOVS sounders on NOAA polar orbiting satellites.
Satellites come and go, and the technical
    documentation for this product documents it all in a very
readable way.


The GPCP is managed by Robert
Adler, and it is a component of the Global Energy and Water Cycle
Experiment of the World Climate Research Program.  GPCP is
an ongoing project, and updates and new algorithms are always being
developed, so users are advised to to check the NASA Goddard
Space Flight Center
to see if there is a newer product that replaces this one.
The updates of the data seem to lag reality by 2-3 months.  I will not
be updating the netCDF version of this data set until I have a need
for updated data.  Please send questions or
comments about the version 2 product to George Huffman.


References:

Adler, R.F., G.J. Huffman, A. Chang, R. Ferraro, P. Xie, J. Janowiak,
B. Rudolf, U. Schneider, S. Curtis, D. Bolvin, A. Gruber, J. Susskind,
P. Arkin, 2003: The Version 2 Global Precipitation Climatology Project
(GPCP) Monthly Precipitation Analysis (1979-Present). J. Hydrometeor.,
4, 1147-1167.



Bolvin, D. T., R. F. Adler, G. J. Huffman, E. J. Nelkin,
J. P. Poutiainen, 2009: Comparison of GPCP monthly and daily
precipitation estimates with high-latitude gauge observations.
J. Appl. Meteor. Climatol., 48, 1843-1857.


Huffman, G. J., and D. T. Bolvin,
2011: GPCP
  Version 2.2 Combined Precipitation Data Set Documentation


Huffman, G. J., R. F. Adler, D. T. Bolvin, G. Gu, 2009: Improving the
Global Precipitation Record: GPCP Version
2.1.  Geophys. Res. Lett., 36, L17808,
doi:10:1029/2009GL040000.


Yin, X., A. Gruber, and P. Arkinc, 2004: Comparison of the GPCP
and CMAP Merged Gauge-Satellite Monthly Precipitation Products for the
Period 1979-2001.  J. Hydromet., 5, 1207-1222.






Data:

Note 1: The GPCP algorithms are always being updated so you are advised to
check the GPCP WWW page to make sure that you are getting the latest
and greatest version of this data set.

Note 2: Error fields for the preciptation estimates are also available at
the GPCP WWW page.


  • binary files: NASA Goddard Space Flight Center
    


  • netCDF format
    
i) Precipitation rate (mm/day),
  obtained
  from NOAA ESRL
    
ii) precitation amount (cm/month)
    
iii) 1979-2004 climatology  Maps
1-12: January, February, ...; map 13: annual mean; maps 14-17
December-January-February, March-April-May, ...
    
iv) The rain gauge
component of GPCP.
    




    

    


    Climatology | ENSO variability
    


    

    

global domain
    
big GIF | 
PDF | PS
    
digital values in a netCDF
file
    
The above figure is derived from 1988-2004 data.
    

Same figure, but with a grid.
    
global domain
    
big GIF | 
PDF | PS
    



    

The following are the individual monthly climatologies derived for
1988-2004.
    
digital values in a netCDF
file (12 maps) | PDF file of the monthly
analyses
    


global domain
    
big GIF | 
PDF | PS
    

global domain
    
big GIF | 
PDF | PS
    

global domain
    
big GIF | 
PDF | PS
    

global domain
    
big GIF | 
PDF | PS
    

global domain
    
big GIF | 
PDF | PS
    

global domain
    
big GIF | 
PDF | PS
    

global domain
    
big GIF | 
PDF | PS
    

global domain
    
big GIF | 
PDF | PS
    

global domain
    
big GIF | 
PDF | PS
    

global domain
    
big GIF | 
PDF | PS
    

global domain
    
big GIF | 
PDF | PS
    

global domain
    
big GIF | 
PDF | PS
    



    

    


Typical ENSO precipitation anomalies for all calendar months combined
    
    global domain
    
big GIF |
PDF | PS
    

The same analysis for just November through April (Northern Hemisphere
	      extratropics cold season)
    
global domain
    
big GIF |
PDF | PS
    

The same analysis for just May through October (Northern Hemisphere
	      extratropics warm season)
    
global domain
    
big GIF |
PDF | PS
    

    


netCDF file of correlation and
		regression maps so that you can make figures for your domain.
    
map 1: precipitation correlation with ENSO index (cold tongue index (CTI),
	      similar to Nino 3.4 SST), all calendar months combined
    
map 2: preciptation regressed onto standard CTI (cm/month), all
	      calendar months combined
    
maps 3 and 4: as in 1 and 2, but for November through April months
    
maps 5 and 6: as in 1 and 2, but for May through October months
    



    

    

    October 2011
    Todd Mitchell ( mitchell@atmos.washington.edu
)
    

JISAO  data