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read_cascade_missingcloud.ncl
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read_cascade_missingcloud.ncl
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;===================================================================================================
; read in atmospheric data from CASCADE files
;
; adapted to account for some of the missing cloud cases.
; specifically when you want to read two times from a file, but only the second is present
;
; can read in from multiple time steps and place in same array
; copy coordinate variables from CASCADE array to finished array
;
; performs temporal interpolation if flag_interp = .TRUE.
;===============================================================
function read_cascade_missingcloud(generic_path:string,timestep_path:integer,timestep_idx:integer,\
filename:string,var_no:string,variable_name:string,flag_interp:logical,\
time_out:integer)
local generic_path,timestep_path,timestep_idx,filename,var_no,variable_name,flag_interp,\
timestep_path_new,timestep_idx_new,\
time_out,no_time_slices,time_in,t_count,data_path_matr,data_path,in_file,\
in_data_tmp,time_data_tmp,no_time_in,time_in,data_size,in_data_ts,var_dims,\
data_size_new,in_data,i_dim,time_dim,in_data_ti
begin
; setfileoption("nc","Format","NetCDF4Classic")
; setfileoption("nc","Compression",1)
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
;; READ IN DATA
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
; 1. work out how many time slices we have in total
no_time_slices = dimsizes(timestep_idx)
time_in = new(no_time_slices,integer)
; do checks to confirm error with cloud file is as we expect
time_in_check = time_in
do t_count = 0,dimsizes(timestep_path)-1
; JASMIN
data_path_matr = (/generic_path,"/p",tostring(timestep_path(t_count)),"/v0/",var_no,"/", \
filename,"p",tostring(timestep_path(t_count)),"_",var_no,".nc"/)
data_path = str_concat(data_path_matr)
; Read in time from file
in_file = addfile(data_path,"r")
time_data_tmp = in_file->time
no_time_in = dimsizes(time_data_tmp)
if (no_time_in.ne.1) then
print("###############################################################")
print("# ERROR: special cloud case for file with one time in it only #")
print("# terminating #")
print("###############################################################")
status_exit(100)
end if
; convert CASCADE time from days to seconds
if (no_time_in.gt.1) then
time_in(t_count) = toint( 60*60*round(time_data_tmp(timestep_idx(t_count))*24,0) )
else
time_in(t_count) = toint( 60*60*round(time_data_tmp(0)*24,0) )
end if
end do
delete([/time_data_tmp/])
; check times are the same
if (time_in(0).ne.time_in(1)) then
print("# ERROR: special cloud case for file with one time in it only #")
print("# two times should be same #")
status_exit(101)
end if
time_in_only = time_in(0)
; check whether need next file or previous file
if (time_in_only.ge.max(time_out)) then
timestep_path_new = (/timestep_path(0)-1,timestep_path(0)/)
timestep_idx_new = (/1,0/)
else ; need next file
timestep_path_new = (/timestep_path(0),timestep_path(0)+1/)
timestep_idx_new = (/0,0/)
end if
;========================================
; DO LOOP OVER NEWLY DEFINED FILES
;========================================
do t_count = 0,dimsizes(timestep_path_new)-1
; JASMIN
data_path_matr = (/generic_path,"/p",tostring(timestep_path_new(t_count)),"/v0/",var_no,"/", \
filename,"p",tostring(timestep_path_new(t_count)),"_",var_no,".nc"/)
data_path = str_concat(data_path_matr)
; Input variable dimensions: (time, latitude, longitude) ;
in_file = addfile(data_path,"r")
in_data_tmp = in_file->$variable_name$
; Read in time from file
time_data_tmp = in_file->time
no_time_in = dimsizes(time_data_tmp)
; convert CASCADE time from days to seconds
if (no_time_in.gt.1) then
time_in(t_count) = toint( 60*60*round(time_data_tmp(timestep_idx_new(t_count))*24,0) )
else
time_in(t_count) = toint( 60*60*round(time_data_tmp(0)*24,0) )
end if
data_size = dimsizes(in_data_tmp)
if (no_time_in.gt.1) then
; more than one timestep in file
; so time must be defined co-ord variable
; just take desired timestep
if (dimsizes(data_size).eq.3) then ; time, lat, lon
in_data_ts = in_data_tmp(timestep_idx_new(t_count),:,:)
in_data_ts!0 = "lat"
in_data_ts!1 = "lon"
else
if (dimsizes(data_size).eq.4) then ; time, lev, lat, lon
in_data_ts = in_data_tmp(timestep_idx_new(t_count),:,:,:)
in_data_ts!0 = "eta_hh"
in_data_ts!1 = "lat"
in_data_ts!2 = "lon"
end if
end if
else
; time is not defined co-ord variable
;if (timestep_idx_new(t_count).eq.0) then
in_data_ts = in_data_tmp
if (dimsizes(data_size).eq.2) then ; lat, lon
in_data_ts!0 = "lat"
in_data_ts!1 = "lon"
else
if (dimsizes(data_size).eq.3) then ; lev, lat, lon
in_data_ts!0 = "eta_hh"
in_data_ts!1 = "lat"
in_data_ts!2 = "lon"
end if
end if
if (timestep_idx_new(t_count).ne.0) then
print("###################################################################")
print("# Warning: timestep_idx_new should be 0 if only one time in file #")
print("# unless known issue with cloud fields #")
print("# check the timestamps of the data #")
print("###################################################################")
end if
end if
copy_VarAtts(in_data_tmp,in_data_ts)
delete([/in_data_tmp,data_size/])
; set up the new empty array into which we will put our multiple time data
if (t_count.eq.0) then
copy_VarAtts(time_data_tmp,time_in)
var_dims = getvardims(in_data_ts)
data_size = dimsizes(in_data_ts)
data_size_new = array_append_record(no_time_slices,data_size,0)
delete([/data_size/])
data_size = data_size_new
delete([/data_size_new/])
in_data = new(data_size,float)
in_data!0 = "time"
do i_dim = 0,dimsizes(var_dims)-1
in_data!(i_dim+1) = in_data_ts!(i_dim)
in_data&$in_data!(i_dim+1)$ = in_data_ts&$in_data_ts!(i_dim)$
end do
delete([/var_dims,i_dim,data_size/])
; copy over some attributes
; in_data@stash_code = in_data_ts@stash_code
; in_data@long_name = in_data_ts@long_name
copy_VarAtts(in_data_ts,in_data)
end if
; put time slice into in_data
data_size = dimsizes(in_data)
if (dimsizes(data_size).eq.3) then ; time, lat, lon
in_data(t_count,:,:) = (/in_data_ts(lat|:,lon|:)/)
else ; time, lev, lat, lon
in_data(t_count,:,:,:) = (/in_data_ts(eta_hh|:,lat|:,lon|:)/)
end if
delete([/time_data_tmp,data_path_matr,data_path,in_file,data_size,in_data_ts/])
end do
; hmc new
in_data&time = time_in
;==============
; ERROR CHECK
if (max(time_out).gt.max(time_in)) then
print("Error: last timestep required is after last input time")
status_exit(300)
end if
if (min(time_out).lt.min(time_in)) then
print("Error: first timestep required is before first input time")
status_exit(301)
end if
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
;; TEMPORAL INTERPOLATION IF REQUIRED
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
if (flag_interp) then
; perform linear interpolation in time
print(" perform temporal interpolation")
time_dim = 0
in_data_ti = linint1_n_Wrap (time_in,in_data,False,time_out,0,time_dim)
in_data_ti!0 = "time"
; time_out in seconds
in_data_ti&time = time_out
delete([/time_in,in_data/])
else
in_data_ti = in_data
delete([/in_data/])
end if
in_data_ti&time@calendar = "gregorian"
in_data_ti&time@standard_name = "time" ;
in_data_ti&time@units = "seconds since 2009-04-06 00:00:00" ;
; delete time from attributes (not dimensions)
delete_VarAtts(in_data_ti,"time")
in_data_ti@center = "U.K. Met Office"
return(in_data_ti)
end