# WRF data along a sonde track in WRF

From: Celeste Mulena <celeste.mulena_at_nyahnyahspammersnyahnyah>
Date: Mon Aug 26 2013 - 18:38:41 MDT

Hi!

Is anybody able to give me any suggestions and help in how I might
interpolate WRF data along a sonde track in WRF?
The wrf_interp1d (lineal interpolation) work bad... skewts plot show other
values.

time = 0

; Temperature
t = a->T(time,:,:,:) ; perturbation potential temperature
(theta-300)
theta = t + 300. ; potential temperature
p = a->P(time,:,:,:)
pb = a->PB(time,:,:,:)
pf = p + pb ; full pressure
tk = wrf_tk (pf, theta) ; temperature in Kelvin

; Height in the model
ph = a->PH(time,:,:,:) ; perturbation geopotential
phb = a->PHB(time,:,:,:) ; base-state geopotential
tmp = (ph+phb)/9.81 ; On full (w) levels
dimv = dimsizes(tmp)
z = 0.5*(tmp(0:dimv(0)-2,:,:)+tmp(1:dimv(0)-1,:,:)) ; On half (mass)
levels
z@description = "height"
z@units = "m"

lat = a->XLAT(time,:,:) ; latitude
lon = a->XLONG(time,:,:) ; longitude

z_raob@_FillValue = -999.99 ; missing value
print(z_raob)
; Station information (OUN - Norman, OK)
olat = -33.65
olon = -71.61

; Find the closest point to the radiosonde site in WRF grids
obsij = wrf_latlon_to_ij(lat,lon,olat,olon)
obsi = obsij(0)
obsj = obsij(1)

tin = tk(:,obsi,obsj)-273
zin = z(:,obsi,obsj)

; Interpolation
t_wrf = wrf_interp_1d (tin,zin,z_raob)
t_wrf@_FillValue = -999.99
print(t_wrf)

Thanks

celeste

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Received on Mon Aug 26 18:38:51 2013

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