These data are Pacific Ocean pseudo-stress from ship reports on a 84x30
grid, 1 grid/month. We acknowledge the support of NOAA Office of
Global Programs, TOGA Project, for this project.

The analyses are the Research-Quality product based on the National
Climatic Data Center (NCDC) surface marine observations data (TD-1129)
for the years 1981-present.

NOTE! The ananlysis for the years 1961-1965 are based on the
Wyrtki-Meyers data set, while the analysis for the years 1966-1980 is
based on the COADS data set.
   
The data are in (meters/sec)**2 with east = positive and north =
positive.

Any tau x and tau y with a value of 999.0 is over land.  The data are
on a 2 by 2 degree grid, with 84 points e-w and 30 points n-s.

       tau x( 1, 1) and tau y( 1, 1) are centered at 124e and 29s 
       tau x( 2, 1)    "     "       are centered at 126e and 29s 
         .
         .
       tau x(83, 1)    "     "       are centered at  72w and 29s 
       tau x(84, 1)    "     "       are centered at  70w and 29s 


       tau x( 1, 2)    "     "       are centered at 124e and 27s 
       tau x( 1, 3)    "     "       are centered at 124e and 25s 
         .
         .
       tau x( 1,29)    "     "       are centered at 124e and 27n 
       tau x( 1,30)    "     "       are centered at 124e and 29n 

The following code is an example of reading the data. Note: the
data in the files are scaled up by a factor of 10, and that using this
format will scale them to the proper numbers.

      program readwd
      dimension taux(84,30),tauy(84,30) 

c     read 1 month wind stress grid

      read (10,100) month,iyear,taux,tauy 
  100 format (2i5,14f5.1,/(16f5.1)) 
       .
       .
       .
       .
       .
      end 

The climatology file (66-85pac.cli) has the same layout as the yearly
data files, with the exception that the year variable reflects the
period of the climatology: xxyy, where 19xx is the beginning year, and
19yy is the ending year.  To retrieve these values in fortran:

      read (1,10) month,iyear,taux,tauy 
      begin_year=iyear/100+1900
      end_year=mod(iyear,100)+1900

The file 25yrmsc.newa has the same layout, except that the year
variable is zero.

--------------------------------

REFERENCES: 

Legler, D.M., and J.J. O'Brien, 1988: Tropical Pacific wind stress 
analysis for TOGA, IOC Time series of ocean measurements,IOC 
Technical Series  33, Volume 4, UNESCO.

Stricherz, J., J. J. O'Brien, and D. M. Legler, 1992: Atlas of Florida
State University Tropical Pacific Winds for TOGA 1966-1985, Florida
State University, Tallahassee, FL, 250 pp.

Stricherz, James N., David M. Legler, and James J. O'Brien, 1997:
TOGA Pseudo-stress Atlas 1985-1994, Volume II: Pacific Ocean,
Florida State University, Tallahassee, FL, 155 pp.

Wyrtki, K. and G. Meyers, 1975: The trade wind field over the
Pacific Ocean. Part I. The mean field and mean annual variation.
Hawaii Inst. Geophys., University of Hawaii. HIG-75-1, 26 pp.

Slutz, R. J., S. J. Lubker, J. D. Hiscox, S. D. Woodruff, R. L.
Jenne, D. H. Joseph, P. M. Seurer and J. D. Elms, COADS-Comprehenisve
Ocean-Atmosphere Data Set, CIRES/ERL/NCAR/NCDC, Boulder, CO, 1985.

======================================================================

Shawn R. Smith        
COAPS
The Florida State University
Tallahassee, FL  32306-2840

Voice: (850) 644-6918
Fax:   (850) 644-4841
 
Internet: winds@coaps.fsu.edu 

Last Revised: 23 January 2002