;+
;
; .. _tropflux_wind_stress.pro:
;
; ========================
; tropflux_wind_stress.pro
; ========================
;
; DESCRIPTION
; ===========
;
; SEE ALSO
; ========
;
; TODO
; ====
;
; integration to the whole process
;
; check existence protection
;
; complete header, complete data_contents.rst
;
; graphviz
;
; EVOLUTIONS
; ==========
;
; $Id$
;
; $URL$
;
; - fplod 20120329
;
;   * pro -> func
;   * rename with lower case TropFlux_wind_stress_19890101_20101231.pro become
;     tropflux_wind_stress.pro
;   * hard coded st and en replaced by yyyymmddb and yyyymmdde parameters
;   * add compile_opt
;   * get rid of hard coded path
;
; - fplod 20110830T153220Z cratos (Linux)
;
;   * remove multiple line statements
;
; - pk 20110830
;
;   * creation
;
;-
function tropflux_wind_stress $
, yyyymmddb $
, yyyymmdde
;
compile_opt idl2, strictarrsubs, logical_predicate
;
@cm_4cal
@cm_4data
@cm_4mesh
@cm_4data
@cm_project
;
;
; Return to caller if errors
ON_ERROR, 2
;
result = -1
;
usage = 'result = tropflux_swr_dt(yyyymmddb, yyyymmdde)'
nparam = N_PARAMS()
IF (nparam NE 2) THEN BEGIN
    ras = report(['Incorrect number of arguments.' $
          + '!C' $
          + 'Usage : ' + usage])
    return, result
ENDIF

dir=project_od_env
file=dir + 'TropFlux_' +  string(yyyymmddb,format='(I8.8)') + '_' + string(yyyymmdde,format='(I8.8)') + '.nc'
initncdf, file
tau=read_ncdf("tau", yyyymmddb-.5d,yyyymmdde, file=file,/nostr)
tau=reform(tau)
help, tau
;
file_wind=dir+'TropFlux_ws_' +  string(yyyymmddb,format='(I8.8)') + '_' + string(yyyymmdde,format='(I8.8)') + '.nc'
file_wg=dir+'gustiness_' +  string(yyyymmddb,format='(I8.8)') + '_' + string(yyyymmdde,format='(I8.8)') + '.nc'
initncdf, file_wind
;
ws=read_ncdf('ws',yyyymmddb-.5d,yyyymmdde,file=file_wind,/nostr)
wg=read_ncdf('wg',yyyymmddb-.5d,yyyymmdde,file=file_wg,/nostr)
s=sqrt((ws*ws)+(wg*wg))
s=reform(s)
help, s
;
file=dir+'erai_ws_+  string(yyyymmddb,format='(I8.8)') + '_' + string(yyyymmdde,format='(I8.8)') + '.nc'
initncdf, file
u=read_ncdf('u10',yyyymmddb-.5d,yyyymmdde,file=file,/nostr)
v=read_ncdf('v10',yyyymmddb-.5d,yyyymmdde,file=file,/nostr)
;
u=reform(u)
v=reform(v)
help, u,v
taux=tau*u/s
tauy=tau*v/s
;
help, taux, tauy
;
time=timegen(8035, start=julday(1,1,1989,0), units='days')
jpt=n_elements(time)
;------------------------------------------------------------
cda0=string(jul2date(time(0)),format='(i8.8)')
cda1=string(jul2date(time(jpt-1)),format='(i8.8)')
time=time-julday(1,1,1950,00,00,00)
xlon=reform(glamt(*,0) )
ylat=reform(gphit(0,*))
;
ncfile='!/Volumes/PAYASAM/TropFlux/ERA_C_1989_2010/tau_tropflux_1d_19890101_20101231.nc'
lon_attr={units:'degrees_east',long_name:'Longitude'}
lat_attr={units:'degrees_north',long_name:'Latitude'}
time_attr={units:'days since 1950-01-01 00:00:00',long_name:'Time axis',time_origin:'1950-JAN-01 00:00:00'}
globattr={Source:'TropFlux - Momentum Fluxes for the Global Tropics', Methodology:'Praveen Kumar et al., Clim. Dyn 2011', Producer_Agency:'Joint research collaboration between IPSL, Paris and NIO, India', Time_range:cda0+' - '+cda1, Creation_date:'20110707', Website:'http://www.locean-ipsl.upmc.fr/tropflux/'}
tau_attr={units:'N/m2',missing_value:valmask,long_name:'wind stress magnitude',short_name:'tau',axis:'TYX'}
taux_attr={units:'N/m2',missing_value:valmask,long_name:'zonal wind stress',short_name:'taux',axis:'TYX'}
tauy_attr={units:'N/m2',missing_value:valmask,long_name:'meridional wind stress',short_name:'tauy',axis:'TYX'}
;
;
help, xlon,ylat, taux, tauy, tau
;
ncfields = 'tau[longitude,latitude,time]=tau:tau_attr; ' $
+'taux[longitude,latitude,time]=taux:taux_attr; ' $
+'tauy[longitude,latitude,time]=tauy:tauy_attr; ' $
+ 'longitude[]=xlon:lon_attr; ' $
+ 'latitude[]=ylat:lat_attr; ' $
+ 'time[*time]=time:time_attr ' $
+ ' @ globattr'
;
@ncdf_quickwrite
;
result = 0
return, result
;
end