;+ ; ; =================== ; interp_erai_msl.pro ; =================== ; ; .. function:: interp_erai_msl(yyyymmddb,yyyymmdde) ; ; DESCRIPTION ; =========== ; ; Interpolation of msl from ERA-I grid to OAFLUX grid ; ; :file:`${PROJECT_ID}/20c3m_erai_msl_TROP_1989_2009.nc` ; containing ; msl from ERA-I ; has been produced by ; :ref:`compute_erai_daily_region_2d.sh`. ; ; :file:`${PROJECT_ID}/mask_oaflux_30N30S.nc` ; containing ; OAFLUX grid ; has been produced by ; :func:`oaflux_mask_30n30s`. ; ; Interpolated msl ; is written in ; :file:`${PROJECT_OD}/erai_msl_{yyyymmdd}_{yyyymmdd}_oafluxgrid.nc` ; if this file not already exists. ; ; This output file ; :file:`${PROJECT_OD}/erai_msl_{yyyymmdd}_{yyyymmdd}_oafluxgrid.nc` ; must be processed after by ; :ref:`d2m_to_q2m_erai.pro`. ; ; .. only:: man ; ; Figure is visible on PDF and HTML documents only. ; ; .. only:: html or latex ; ; .. graphviz:: ; ; digraph interp_erai_msl { ; ; file_in [shape=ellipse,fontname=Courier,label="${PROJECT_ID}/20c3m_erai_msl_TROP_1989_2009.nc"]; ; mask [shape=ellipse,fontname=Courier,label="${PROJECT_ID}/mask_oaflux_30N30S.nc"]; ; file_out [shape=ellipse,fontname=Courier,label="${PROJECT_OD}/erai_msl_{yyyymmdd}_{yyyymmdd}_oafluxgrid.nc"]; ; ; interp_erai_msl [shape=box, ; fontname=Courier, ; color=blue, ; URL="http://forge.ipsl.jussieu.fr/tropflux/browser/trunk/src/interp_erai_msl.pro", ; label="${PROJECT}/src/interp_erai_msl.pro"]; ; ; {file_in mask} -> {interp_erai_msl} -> {file_out} ; ; } ; ; SEE ALSO ; ======== ; ; :ref:`interpolate_data` ; ; :ref:`project_profile.sh` ; ; Used by :ref:`tropflux.sh` ; ; :func:`report ` ; :func:`isadirectory ` ; :func:`isafile ` ; :func:`initncdf ` ; :func:`read_ncdf ` ; :func:`domdef ` ; :func:`call_interp2d ` ; :func:`ncdf_quickwrite ` ; ; :ref:`d2m_to_q2m_erai.pro` ; ; EXAMPLES ; ======== ; ; :: ; ; IDL> .compile file_interp ; IDL> yyyymmddb = 20000101 ; IDL> yyyymmdde = 20000302 ; IDL> result = interp_erai_msl(yyyymmddb, yyymmdde) ; IDL> print, result ; ; TODO ; ==== ; ; use real output of :ref:`compute_erai_daily_region_2d.sh` ; ; get_erai.py + grib to netcdf conversion ; ; msl_attr={units:'milibars' .. millibar at least, hPa will be probably ; more SI ; ; why 19880101,20100930 as dates in read_ncdf. ; now (20120319) should be yyyymmddb and yyymmdde but desastrous side effect ; ; first step time 14245.5 (days since 1950-01-01 00:00:00) : correct ? ; ; KNOWN ISSUES ; ============ ; ; test of existence of fullfilename_msk not very efficient because ; MUST_EXIST keyword of :func:`isafile ` not yet implemented ; ; EVOLUTIONS ; ========== ; ; $Id: interp_erai_msl.pro 88 2011-08-19 15:40:14Z pinsard $ ; ; $URL$ ; ; - fplod 20120319 ; ; * taking project_overwite into account ; * pro -> function ; ; - pinsard 2011-08-23T09:09:16Z loholt1.ipsl.polytechnique.fr (Linux) ; ; * retry on loholt1 with idl8 and idl6 ; ; - fplod 20110811T113646Z aedon.locean-ipsl.upmc.fr (Darwin) ; ; * check for units in original file before conversion ; ; - fplod 20110809T145539Z aedon.locean-ipsl.upmc.fr (Darwin) ; ; * remove v1 from pro name and file ; * header ; * usage of ${PROJECT_ID} and ${PROJECT_OD} ; * remove return statement ; * add test on IO files ; * add OUTMASK_IND and SET_OUTMSKVAL to call_interp2d call ; ; - pbk 2008 ; ; * creation ; ;- function interp_erai_msl $ , 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 = interp_erai_msl(yyyymmddb, yyyymmdde) nparam = N_PARAMS() IF (nparam NE 2) THEN BEGIN ras = report(['Incorrect number of arguments.' $ + '!C' $ + 'Usage : ' + usage]) return, result ENDIF ; ; check for input directory ; ; test if ${PROJECT_ID} defined CASE project_id_env OF '' : BEGIN msg = 'eee : ${PROJECT_ID} is not defined' ras = report(msg) return, result END ELSE: BEGIN msg = 'iii : ${PROJECT_ID} is ' + project_id_env ras = report(msg) END ENDCASE ; iodirin = isadirectory(project_id_env) ; ; existence and protection of ${PROJECT_ID} IF (FILE_TEST(iodirin, /DIRECTORY, /EXECUTABLE, /READ) EQ 0) THEN BEGIN msg = 'eee : the directory' + iodirin + ' is not accessible.' ras = report(msg) return, result ENDIF ; ; build mask filename filename_msk='mask_oaflux_30N30S.nc' ; ; check if this file exists msg='iii : looking for ' + filename_msk ras = report(msg) fullfilename_msk = isafile(iodirin + filename_msk, NEW=0, /MUST_EXIST) IF fullfilename_msk[0] EQ '' THEN BEGIN msg = 'eee : the file ' + fullfilename_msk + ' was not found.' ras = report(msg) return, result ENDIF ; ; build data filename filename='20c3m_erai_msl_TROP_1989_2009.nc' ; ; check if this file exists msg='iii : looking for ' + filename ras = report(msg) fullfilename = isafile(iodirin + filename, NEW=0, /MUST_EXIST) IF fullfilename[0] EQ '' THEN BEGIN msg = 'eee : the file ' + fullfilename + ' was not found.' ras = report(msg) return, result ENDIF ; ; test if ${PROJECT_OD} defined CASE project_od_env OF '' : BEGIN msg = 'eee : ${PROJECT_OD} is not defined' ras = report(msg) return, result END ELSE: BEGIN msg = 'iii : ${PROJECT_OD} is ' + project_od_env ras = report(msg) END ENDCASE ; ; check if output data will be possible iodirout = isadirectory(project_od_env) ; ; existence and protection IF (FILE_TEST(iodirout, /DIRECTORY, /WRITE) EQ 0) THEN BEGIN msg = 'eee : the directory' + iodirout + ' was not found.' ras = report(msg) return, result ENDIF ; ; build output filename filename_out = 'erai_msl_' + string(yyyymmddb,format='(I8.8)') + '_' + string(yyyymmdde,format='(I8.8)') + '_oafluxgrid.nc' fullfilename_out = iodirout + filename_out ; in order to avoid unexpected overwritten IF ((FILE_TEST(fullfilename_out) EQ 1) AND (project_overwrite EQ 0)) THEN BEGIN msg = 'eee : the file ' + fullfilename_out + ' already exists.' ras = report(msg) return, result ENDIF ; initncdf, fullfilename domdef latin=reform(gphit[0,*]) lonin=reform(glamt[*,0]) print, 'lat grid ',min(latin),max(latin),latin[1]-latin[0] print, 'lon grid ',min(lonin),max(lonin),lonin[1]-lonin[0] ;++mslin=read_ncdf("msl",yyyymmddb,yyymmdde,file=fullfilename,/nostr) mslin=read_ncdf("msl",19880101,20100930,file=fullfilename,/nostr) ; ; timein=time jptin=jpt tab=mslin[*,*,0] mskin=glamt*0.+1. ; initncdf, fullfilename_msk domdef latout=reform(gphit[0,*]) lonout=reform(glamt[*,0]) print, 'lat grid ',min(latout),max(latout),latout[1]-latout[0] print, 'lon grid ',min(lonout),max(lonout),lonout[1]-lonout[0] mskout=read_ncdf("msk", file=fullfilename_msk,/nostr) ; ; conversion to hPa ncdf_getatt, fullfilename, 'msl', units=units CASE units OF 'Pascal': BEGIN mslin=mslin/100 END ELSE: BEGIN msg = 'eee : ' + units + ' unknown' ras = report(msg) return, result END ENDCASE ; help, mslin,lonin,latin,mskin,lonout,latout,mskout ; mslout=fltarr(jpi,jpj,jptin) for jt=0,jptin-1 do begin ; ++ print, 'Interpolation jt=',jt,' / ',jptin-1 tab=reform(mslin[*,*,jt]) mslout[*,*,jt]=call_interp2d(tab,lonin,latin,mskin $ , lonout,latout,method='bilinear' $ , OUTMASK_IND=mskout, SET_OUTMSKVAL=mskout) mslout[*,*,jt]=mslout[*,*,jt]*mskout+(1.-mskout)*1.e20 endfor ; initncdf, fullfilename_msk time=timegen(jptin, start=julday(1,1,1989,0), units='days') cda0=string(jul2date(time[0]),format='(i8.8)') cda1=string(jul2date(time(jpt-1)),format='(i8.8)') timein=time-julday(1,1,1950,00,00) ; lat=latout lon=lonout ncfile='!' + fullfilename_out 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:'Data are from ECMWF ERA-Interim reanalysis', timerange:cda0+' - '+cda1} msl_attr={units:'milibars',missing_value:1e20,long_name:'Mean Sea leval pressure',short_name:'msl',axis:'TYX'} ; ncfields = 'msl[longitude,latitude,time]=mslout:msl_attr; ' $ + 'longitude[]=lon:lon_attr; ' $ + 'latitude[]=lat:lat_attr; ' $ + 'time[*time]=timein:time_attr ' $ + ' @ globattr' ; @ncdf_quickwrite ; result = 0 return, result ; end