! jnl file that uses Argo data to make 20-degree isotherm depth maps
! requires input arguments for time range, depth range 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_tchp time_start time_end lat_min lat_max lon_min lon_max iland station 

! 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 4 variables as well as the lat/lon ranges.

! time values are entered corresponding to monthly values starting with Jan, 2004 
! iland  0=hig res, 1=low res go fland
! station 1=overlay stations, all other values disable

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

! assigning variables to arguments passed in the go command as well as default values
let lat_min=`$3%-30%`
let lat_max=`$4%0%`
let lon_min=`$5%130%`
let lon_max=`$6%210%`
let time_start=`$1%48%`
let time_end=`$2%48%`
let iland=`$7%1%`
let station=`$8%0%`
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 pen 2,13
ppl labset .15,.15,.15


use RG_ArgoClim_Full.nc
use climatological_axes

let dyn_s = argo_salinity_mean[d=1] + argo_salinity_anomaly[d=1]
let dyn_t = argo_temperature_mean[d=1]+argo_temperature_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 xdegb `($xdeg)`*2
define symbol alasp `($ydeg)/($xdegb)`
let wincheck= if `($alasp)` ge 1 then 1 else 0
if `wincheck` then
define symbol alasp `($ydeg)/($xdeg)`
endif
set win/asp=($alasp):axis
!set win/asp=0.7
define viewport/xlim=.0,.95/ylim=.4,1 top
define viewport/xlim=.0,.95/ylim=.0,.6 bot

define region/z=0:1000/y=`lat_min`:`lat_max`/x=`lon_min`:`lon_max` treg
set region treg

define grid/like=dyn_t dgrd
let dyn_p = z[d=1,g=dgrd]

let rcheck=`lon_max`-`lon_min`
!let new_t=if dyn_t gt 26. then (dyn_t-26.) else 0.
let new_t=if dyn_t gt 26. then (dyn_t-26.)
let tchp=new_t[z=0:1000@dint]
let factor=1024.*4000./10000000.

set view top

fill/nolab/set/lev=(0,240,20)/pale=default  tchp[l=`time_start`:`time_end`@ave]*factor
ppl axlabp 0,-1
ppl ylab                 
ppl xlab                    
ppl fill
con/over/nolab/pen=7 dyn_t[z=0,l=`time_start`:`time_end`@ave]

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


set view bot

fill/nolab/set/pale=centered/lev=(-100,100,10)  tchp[l=`time_start`:`time_end`@ave]*factor - tchp[gt=month_irreg@mod, l=`time_start`:`time_end`@ave]*factor
ppl axlabp 0,-1
ppl ylab                 
ppl xlab                    
ppl fill
con/over/nolab/pen=7 dyn_t[z=20,l=`time_start`:`time_end`@ave]

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

if `station eq 1` then
go fer_temp_station_loc_overlay
endif

set view top
if `station eq 1` then
go fer_temp_station_loc_overlay
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_tchp time_start time_end lat_min lat_max lon_min lon_max iland station