<div dir="ltr"><div>I am trying to extract wrf variables for upper
levels at (850,700,500,200mb) using nco. I want to extract these variables
pressure, temp(tc),height(z), relative humidity(rh), ua and va winds, potential
vorticity(pvo) and vertical vorticity(wa). Then save the files as a .nc and using
other tools to plot and analyses them. I tried using NCO but it doesn’t work, an
error, <br><a href="http://research.jisao.washington.edu/data_sets/nco/" target="_blank">http://research.jisao.<wbr>washington.edu/data_sets/nco/</a><br><br>ncea -d level,6,6 -F, v Times XLAT,XLONG,pressure,tc,z,rh,<wbr>ua,va,pvo,wa, wrfout_d01_1997* -0 <a href="http://wrf_upper_var.nc" target="_blank">wrf_upper_var.nc</a><br><br></div><div>however, i get the errors below <span style="font-size:14px"><br>ncea: ERROR nco_var_lst_mk() reports user-specified variable "pressure" is not in input file" .<br><br></span></div><div><span style="font-size:14px">I believe these variables are present in the wrfoutput. Does someone understand better how to go about it. I use always nco succesfully to extract the surface variables like<br>(ncrcat -d Time,31,155 -v Times,XLAT,XLONG,RAINC,RAINNC,U10,V10,T2,HGT,PSFC wrfout_d01_2015* -O wrf_2015_Oct_Rain_BML.nc)<br></span></div><div><br></div><br></div>