! jnl file that uses Argo data to make potential density plots
! requires input arguments for the time range, dynamic height levels and lat/lon range

! to run the program in ferret, you will need to type the following line with the various values filled in:

!  go fer_podens_map_real_time depth_min depth_max lat_min lat_max lon_min lon_max iland con_lev

! If you choose not to give values for the various variables, default ones will be substituted for you.
! If you only want to choose some values, you can, but you cannot skip any values.  This means you can 
! fill in the first 2 and no others, or if you want to specify the lat/lon ranges, you must fill in values
! for the first variables as well as the lat/lon ranges.


! depth values are entered in the range of 0 to 2000dbar
! iland  0=hig res, 1=low res go fland
! con_lev sets the contour and fill levels of the plot.  This is done in the following format:  (lo,hi,delta).  
! More than one can be chosen:  (lo,mid,delta1),(mid,hi,delta2).  See the Ferret Users Manual for more information.


cancel/all data
cancel/all var
cancel/all sym
set mem/size=80
set window/clear
go set_pixel_size 1024 768
set mem/size=100

! assigning variables to arguments passed in the go command as well as default values
let lat_min=`$3%-30%`
let lat_max=`$4%30%`
let lon_min=`$5%0%`
let lon_max=`$6%360%`
let depth_min=`$1%0%`
let depth_max=`$2%100%`
let iland=`$7%1%`
set mode interpolate

PPL DFLTFNT DR
ppl conpre @P1@DR
ppl axlsze 0.15,.15
ppl axset 1,1,1,1
ppl pen 0,7
ppl pen 1,7
ppl labset .15,.15,.15


use RG_ArgoClim_Real_Time.nc
let temp=argo_temperature_anomaly[d=1]
let psal=argo_salinity_anomaly[d=1]

! setting map scales properly
let beq=if (`lon_min`) eq (`lon_max`) then 1 else 0
if `beq` then
let lon_max=`lon_max`+360
endif
let blm=if (`lon_min`) gt (`lon_max`) then 1 else 0
if `blm` then
let lon_max=`lon_max`+360
endif
define symbol xdeg `lon_max-lon_min`
define symbol ydeg `lat_max-lat_min`
define symbol alasp `($ydeg)/($xdeg)`
set win/asp=($alasp):axis
define region/z=`depth_min`:`depth_max`/y=`lat_min`:`lat_max`/x=`lon_min`:`lon_max` mreg
set region mreg 

! setting depth region
set region/z=`depth_min`:`depth_max`

! calculate dynamic height
let dyn_s=psal[d=1]
let dyn_t=temp[d=1]
let dyn_p=z[d=1,g=`temp, return=grid`]

go dynamic_height

let dens=rho_un(dyn_s,dyn_t,dyn_p)
let potemp=THETA_FO(dyn_s,dyn_t,dyn_p,0)
let podens=rho_un(dyn_s,potemp,0.)-1000

! begin mapping process

! only map an average if the two depths are different.  otherwise, map at that depth only
! only plot averaged points if there is data down at the deepest layer
let mskd=if podens[x=`lon_min`:`lon_max`,y=`lat_min`:`lat_max`,z=`depth_max`] then 1
 
! depth is the same
let a=if `depth_min` eq `depth_max` then 1 else 0
if `a` then
let podens_map=podens[x=`lon_min`:`lon_max`,y=`lat_min`:`lat_max`,z=`depth_min`]
let con_lev= $8&"()"|*>"*"&
fill/nolab/pal=default/set/x=`lon_min`:`lon_max`/y=`lat_min`:`lat_max`/lev="`con_lev`" podens_map
ppl shakey 1,,.08,,5,,,,,,
ppl fill
! can add contours 
 con/set/over/nolab/lev="`con_lev`" podens_map
 ppl conset .11,,,,,,,5.7,1.,1
 ppl contour/overlay
endif

! depth is different
let b=if `depth_min` ne `depth_max` then 1 else 0
if `b` then
let podens_map=podens[x=`lon_min`:`lon_max`,y=`lat_min`:`lat_max`,z=`depth_min`:`depth_max`@ave]
let con_lev= $8&"()"|*>"*"&
fill/nolab/pal=default/set/x=`lon_min`:`lon_max`/y=`lat_min`:`lat_max`/lev="`con_lev`" podens_map
ppl shakey 1,,.08,,5,,,,,,
ppl fill
! can add contours 
 con/set/over/nolab/lev="`con_lev`" podens_map
 ppl conset .11,,,,,,,5.7,1.,1
 ppl contour/overlay
endif

! now use etopo6 to add bathymetry
! check zonal range to see if using high or low land resoluion
let rcheck=`lon_max`-`lon_min`
if `rcheck gt 120` then
if `iland eq 0` then
use etopo12_grid.nc
shade/over/nokey/nolab/pal=black/hlim=`lon_min`:`lon_max`/vlim=`lat_min`:`lat_max`/lev=(0,10000,10000) btdata12[y=`lat_min`:`lat_max`,x=`lon_min`:`lon_max`]
shade/over/nokey/nolab/palette=lightgreyscale/over/hlim=`lon_min`:`lon_max`/vlim=`lat_min`:`lat_max`/levels=(-1000,0,1000) btdata12[y=`lat_min`:`lat_max`,x=`lon_min`:`lon_max`]
shade/over/nokey/nolab/pal=grey/over/hlim=`lon_min`:`lon_max`/vlim=`lat_min`:`lat_max`/lev=(-200,0,200) btdata12[y=`lat_min`:`lat_max`,x=`lon_min`:`lon_max`]
endif
if `iland eq 1` then
use etopo12_grid.nc
fill/over/nokey/nolab/palette=black/hlim=`lon_min`:`lon_max`/vlim=`lat_min`:`lat_max`/levels=(0,10000,10000) btdata12[y=`lat_min`:`lat_max`,x=`lon_min`:`lon_max`]
endif
endif
if `rcheck le 120` then
if `iland eq 0` then
use etopo6_grid.nc
shad/over/nokey/nolab/palette=black/hlim=`lon_min`:`lon_max`/vlim=`lat_min`:`lat_max`/levels=(0,10000,10000) btdata[y=`lat_min`:`lat_max`,x=`lon_min`:`lon_max`]
shad/over/nokey/nolab/palette=lightgreyscale/over/hlim=`lon_min`:`lon_max`/vlim=`lat_min`:`lat_max`/levels=(-1000,0,1000) btdata[y=`lat_min`:`lat_max`,x=`lon_min`:`lon_max`]
shad/over/nokey/nolab/palette=grey/over/hlim=`lon_min`:`lon_max`/vlim=`lat_min`:`lat_max`/levels=(-200,0,200) btdata[y=`lat_min`:`lat_max`,x=`lon_min`:`lon_max`]
else
use etopo6_grid.nc
shad/over/nokey/nolab/palette=black/hlim=`lon_min`:`lon_max`/vlim=`lat_min`:`lat_max`/levels=(0,10000,10000) btdata[y=`lat_min`:`lat_max`,x=`lon_min`:`lon_max`]
endif

endif



say Plot is finished
say To adjust parameters, use the command line to pass arguments
say For this file, the form to pass arguments is
say go fer_podens_map_real_time depth_min depth_max lat_min lat_max lon_min lon_max iland con_lev