;+
;
; .. _cronin_gustiness_ncdf.pro:
;
; =========================
; cronin_gustiness_ncdf.pro
; =========================
;
;     .. graphviz::
;
;        digraph cronin_gustiness_ncdf {
;           graph [
;           rankdir="LR",
;           ]
;           file_sst [shape=ellipse,fontname=Courier,label="/Volumes/Iomega_HDD/TropFlux/input_cor/full_cor/TropFlux_sst_19890101_20091231.nc"];
;           ncfile [shape=ellipse,fontname=Courier,label="/Users/pkb/data/TropFlux/TropFlux_gustiness_19890101_20091231_v50.nc"];
;           cronin_gustiness_ncdf [shape=box,
;           fontname=Courier,
;           color=blue,
;           URL="http://forge.ipsl.jussieu.fr/tropflux/browser/trunk/src/cronin_gustiness_ncdf.pro",
;           label="${PROJECT}/src/cronin_gustiness_ncdf.pro"];
;           {file_sst} -> {cronin_gustiness_ncdf} -> {ncfile}
;        }
;
; EXAMPLES
; ========
;
; ::
;
;  IDL> cronin_gustiness_ncdf
;
; SEE ALSO
; ========
;
; :func:`initncdf <saxo:initncdf>`
; :func:`julday <saxo:julday>`
; :func:`ncdf_quickwrite <saxo:ncdf_quickwrite>`
;
; TODO
; ====
;
; hard coded directory - usage of ${PROJECT_ID}
;
; coding rules
;
; EVOLUTIONS
; ==========
;
; - fplod 20101215T092619Z aedon.locean-ipsl.upmc.fr (Darwin)
;
;   * add graph in header
;
; - fplod 20101214T093615Z aedon.locean-ipsl.upmc.fr (Darwin)
;
;   * minimal header
;
; - pbk 2008
;
;   * creation
;
;-
pro cronin_gustiness_ncdf
@common
da1=19880101 & da2=20101231
date1=19890101 & date2=20081231

file_sst='/Volumes/Iomega_HDD/TropFlux/input_cor/full_cor/TropFlux_sst_19890101_20091231.nc'
initncdf, file_sst
sst=read_ncdf('sst',da1,da2,file=file_sst,/nostr) & sst=reform(sst-273.15)
help, sst

sst_clim=grossemoyenne(sst, 't',/nan)
;wg=0.175*sst_clim-3.17  ;; line fit obtained from the scatter (Cronin gustiness Vs ERAI SST)
;help, wg

jpt=n_elements(time)

wg_tot=sst*0.
for jt=0, jpt-1 do begin
    wg_tot(*,*,jt)=(((sst_clim(*,*)-23.7)*2.1/(29.8-23.7)) > 1.) <2.1
endfor
help, wg_tot

;; writing field
time=timegen(7670, units='days', start=julday(1,1,1989,0)) & jpt=n_elements(time)

cda0=string(jul2date(time(0)),format='(i8.8)')
cda1=string(jul2date(time(jpt-1)),format='(i8.8)')
tt=time-julday(1,1,1950,00,00,00)
xlon=reform(glamt(*,0) ) & ylat=reform(gphit(0,*))

ncfile='!/Users/pkb/data/TropFlux/TropFlux_gustiness_19890101_20091231_v50.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'}
gust_attr={units:'m/s',missing_value:valmask,long_name:'Climatological gustiness',short_name:'wg',axis:'TYX'}
globattr={source:'Climatological wind gustiness obtained by fitting cronins gustiness values against sst ',timerange:cda0+' - '+cda1}

ncfields = 'wg[longitude,latitude,time]=wg_tot:gust_attr; ' $
                      + 'longitude[]=xlon:lon_attr; ' $
                      + 'latitude[]=ylat:lat_attr; ' $
                      + 'tt[*time]=tt:time_attr ' $
                      + ' @ globattr'

@ncdf_quickwrite

return
end