def interp(inputvar,inputz,outputz,vartype="data",inputt=None,inputp=None):
"""Interpolate an input 3D dataset from an input 3D elevation grid to the output 3D grid
if vartype is set to "p" pressure, it will perform a more sophisticated interpolation,
but that requires REAL temperature data
if vartype is set to "t" temperature, it will convert to potential temperature before
converting, but that requires pressure data
"""
# for pressure interpolation, use a temperature dependant vertical shift
if vartype=="p":
if inputt==None:
raise(ValueError("Need Temperature to interpolate pressure"))
return interp_pressure(inputvar,inputz,outputz,inputt)
# if we were given real temperature, convert to potential temperature
if vartype=="t":
if inputp==None:
raise(ValueError("Need Pressure data to interpolate temperature"))
else:
inputvar=inputvar*units.exner(inputp)
output=_vinterp(inputvar,inputz,outputz)
if vartype=="t":
inputvar=inputvar/units.exner(inputp)
print("WARNING!! Returning potential temperature, not REAL temperature")
print(" Use interpolated pressure to convert back to REAL temperature")
return output
def interp_multivar(inputvar,outputvar,timestep,inputz,outputz,vartype="data",inputt=None,inputp=None):
"""Interpolate an input 3D dataset from an input 3D elevation grid to the output 3D grid
if vartype is set to "p" pressure, it will perform a more sophisticated interpolation,
but that requires REAL temperature data
if vartype is set to "t" temperature, it will convert to potential temperature before
converting, but that requires pressure data
"""
interp_keys=[]
for vartype in inputvar.keys():
# for pressure interpolation, use a temperature dependant vertical shift
if vartype=="p":
if inputt==None:
raise(ValueError("Need Temperature to interpolate pressure"))
outputvar[vartype][timestep]=interp_pressure(inputvar[vartype][timestep],
inputz, outputz, inputt)
elif vartype!="z":
interp_keys.append(vartype)
# if we were given real temperature, convert to potential temperature
if vartype=="t":
if inputp==None:
raise(ValueError("Need Pressure data to interpolate temperature"))
else:
inputvar[vartype][timestep]=inputvar[vartype][timestep]*units.exner(inputp)
_vinterp_multivar(inputvar,outputvar,timestep,inputz,outputz,interp_keys)
if "t" in inputvar.keys():
inputvar["t"][timestep]=inputvar["t"][timestep]/units.exner(inputp)
print("WARNING!! Returning potential temperature, not REAL temperature")
print(" Use interpolated pressure to convert back to REAL temperature")
def load_erai_means(wind_option):
"""docstring for load_erai_means"""
eraid="erai/"
varlist=["p","rh","ta","ua","va","z"]
if (wind_option=="nowind"):
varlist=["p","rh","ta","z"]
outputdata=[]
month_mid_point_doy=(start_day_per_month[1:]+np.array(start_day_per_month[:-1]))*0.5
for month in range(1,13):
curoutput=Bunch(doy=month_mid_point_doy[month-1])
for v in varlist:
if v=="ta":
ta=mygis.read_nc(eraid+"regridded_ERAi_to_cesm_month{0:02}.nc".format(month),v).data
else:
curoutput[v]=mygis.read_nc(eraid+"regridded_ERAi_to_cesm_month{0:02}.nc".format(month),v).data
curoutput["theta"] = ta / units.exner(curoutput.p)
# erai is probably "upside down" so reverse the vertical dimension of all variables
if curoutput.p[0,0,0]<curoutput.p[-1,0,0]:
for v in curoutput.keys():
if v!="doy":
curoutput[v]=curoutput[v][::-1,:,:]
outputdata.append(curoutput)
return outputdata
def load_erai_means(wind_option):
"""docstring for load_erai_means"""
eraid = "erai/"
varlist = ["p", "rh", "ta", "ua", "va", "z"]
if (wind_option == "nowind"):
varlist = ["p", "rh", "ta", "z"]
outputdata = []
month_mid_point_doy = (start_day_per_month[1:] +
np.array(start_day_per_month[:-1])) * 0.5
for month in range(1, 13):
curoutput = Bunch(doy=month_mid_point_doy[month - 1])
for v in varlist:
if v == "ta":
ta = mygis.read_nc(
eraid +
"regridded_ERAi_to_cesm_month{0:02}.nc".format(month),
v).data
else:
curoutput[v] = mygis.read_nc(
eraid +
"regridded_ERAi_to_cesm_month{0:02}.nc".format(month),
v).data
curoutput["theta"] = ta / units.exner(curoutput.p)
# erai is probably "upside down" so reverse the vertical dimension of all variables
if curoutput.p[0, 0, 0] < curoutput.p[-1, 0, 0]:
for v in curoutput.keys():
if v != "doy":
curoutput[v] = curoutput[v][::-1, :, :]
outputdata.append(curoutput)
return outputdata
def vinterp_q(file_name=None):
"""interpolate all variables to a common z level"""
print("Interpolating quantities")
if file_name != None:
file_search = file_name
qvarlist = ["qv", "theta", "p", "u", "v"]
qdata = Bunch()
print("Loading data")
t0 = time.time()
for varname in qvarlist:
print(varname)
qdata[varname] = mygis.read_files(file_search, varname, axis=0)
print("z")
qdata["z"] = mygis.read_files(file_search, "z", axis=0)
mean_z = mygis.read_nc("annual_mean_z.nc", "z").data
print(" Reading data took {0:6.2f} seconds".format((time.time() - t0)))
t0 = time.time()
temperature = qdata.theta * units.exner(qdata.p)
print(" Temperature conversion took {0:6.2f} seconds".format(
(time.time() - t0)))
t0 = time.time()
print("Computing RH")
qdata["rh"] = compute_rh(qdata, temperature)
qvarlist.append("rh")
print(" RH calculation took {0:6.2f} seconds".format((time.time() - t0)))
print("Interpolating")
qout = Bunch()
for varname in qvarlist:
qout[varname] = np.zeros(qdata[varname].shape)
t0 = time.time()
nsteps = qdata.z.shape[0]
for i in range(nsteps):
vertical_interp.interp_multivar(qdata,
qout,
i,
qdata.z[i],
mean_z,
vartype=varname,
inputt=temperature[i],
inputp=qdata.p[i])
print(" Interpolation took {0:6.2f} seconds per timestep".format(
(time.time() - t0) / nsteps))
print("Writing data")
write_interpolated_6hrly(qout, mean_z, file_name)
def interp_era_to_cesm(erai,cesm):
"""docstring for interp_era_to_cesm"""
print("Monthly vertical interpolation")
varlist=erai[0].keys() #["p","rh","theta","ua","va"]
mean_z=cesm[0].z
inputp=np.zeros(erai[0].p.shape)
for i in range(len(erai)):
print("Month {}".format(i+1))
inputp[:]=erai[i].p[:]
temperature=erai[i].theta * units.exner(inputp)
for v in varlist:
if (v!="doy") and (v!="z"):
erai[i][v]=vertical_interp.interp(erai[i][v], erai[i]["z"], mean_z,
vartype=v, inputt=temperature, inputp=inputp)
erai[i]["z"]=mean_z
return erai
def vinterp_q(file_name=None):
"""interpolate all variables to a common z level"""
print("Interpolating quantities")
if file_name!=None:
file_search=file_name
qvarlist=["qv","theta","p","u","v"]
qdata=Bunch()
print("Loading data")
t0=time.time()
for varname in qvarlist:
print(varname)
qdata[varname]=mygis.read_files(file_search,varname,axis=0)
print("z")
qdata["z"]=mygis.read_files(file_search,"z",axis=0)
mean_z=mygis.read_nc("annual_mean_z.nc","z").data
print(" Reading data took {0:6.2f} seconds".format((time.time()-t0)))
t0=time.time()
temperature=qdata.theta*units.exner(qdata.p)
print(" Temperature conversion took {0:6.2f} seconds".format((time.time()-t0)))
t0=time.time()
print("Computing RH")
qdata["rh"]=compute_rh(qdata,temperature)
qvarlist.append("rh")
print(" RH calculation took {0:6.2f} seconds".format((time.time()-t0)))
print("Interpolating")
qout=Bunch()
for varname in qvarlist:
qout[varname]=np.zeros(qdata[varname].shape)
t0=time.time()
nsteps=qdata.z.shape[0]
for i in range(nsteps):
vertical_interp.interp_multivar(qdata,qout,i, qdata.z[i], mean_z,vartype=varname,
inputt=temperature[i],inputp=qdata.p[i])
print(" Interpolation took {0:6.2f} seconds per timestep".format((time.time()-t0)/nsteps))
print("Writing data")
write_interpolated_6hrly(qout,mean_z,file_name)
def apply_bias_correction(wind_option):
"""docstring for apply_bias_correction"""
varlist = ["theta", "p", "u", "v", "rh"]
if wind_option == "nowind": print("Skipping U and V bias correction.")
biases = load_biases(wind_option)
current_files = glob.glob("cesm_*.nc")
current_files.sort()
for f in current_files:
print("Bias Correcting : " + f)
output_data = mygis.Dataset(f, mode="a")
for v in varlist:
print(" Variable : " + v)
try:
d = mygis.read_nc("vinterpolated/" + v + "_" + f, v).data
except:
d = mygis.read_nc(v + "_" + f, v).data
if (wind_option == "nowind") and ((v == "u") or (v == "v")):
pass
if (wind_option == "meanwind") and ((v == "u") or (v == "v")):
for i in range(d.shape[0]):
windbias = biases[int(np.round(i /
float(times_per_day)))][v]
for j in range(d.shape[1]):
d[i, j, ...] -= np.mean(windbias[j, ...])
else:
for i in range(d.shape[0]):
d[i, ...] -= biases[int(np.round(i /
float(times_per_day)))][v]
if v == "rh":
d[d < 1e-10] = 1e-10
d[d > 100] = 100
rh = d
else:
output_data.variables[v][:] = d
p = output_data.variables["p"][:] / 100.0 # convert to mb
t = output_data.variables["theta"][:] * units.exner(p)
output_data.variables["qv"][:] = units.rh2sh(t, p, rh)
output_data.variables["z"] = biases[0]["z"][np.newaxis, :, :, :]
output_data.close()
def apply_bias_correction(wind_option):
"""docstring for apply_bias_correction"""
varlist=["theta","p","u","v","rh"]
if wind_option=="nowind": print("Skipping U and V bias correction.")
biases=load_biases(wind_option)
current_files=glob.glob("cesm_*.nc")
current_files.sort()
for f in current_files:
print("Bias Correcting : "+f)
output_data=mygis.Dataset(f,mode="a")
for v in varlist:
print(" Variable : "+v)
try:
d=mygis.read_nc("vinterpolated/"+v+"_"+f,v).data
except:
d=mygis.read_nc(v+"_"+f,v).data
if (wind_option=="nowind") and ((v=="u") or (v=="v")):
pass
if (wind_option=="meanwind") and ((v=="u") or (v=="v")):
for i in range(d.shape[0]):
windbias=biases[int(np.round(i/float(times_per_day)))][v]
for j in range(d.shape[1]):
d[i,j,...]-=np.mean(windbias[j,...])
else:
for i in range(d.shape[0]):
d[i,...]-=biases[int(np.round(i/float(times_per_day)))][v]
if v=="rh":
d[d<1e-10]=1e-10
d[d>100]=100
rh=d
else:
output_data.variables[v][:]=d
p=output_data.variables["p"][:]/100.0 # convert to mb
t=output_data.variables["theta"][:] * units.exner(p)
output_data.variables["qv"][:]=units.rh2sh(t,p,rh)
output_data.variables["z"]=biases[0]["z"][np.newaxis,:,:,:]
output_data.close()
def interp_era_to_cesm(erai, cesm):
"""docstring for interp_era_to_cesm"""
print("Monthly vertical interpolation")
varlist = erai[0].keys() #["p","rh","theta","ua","va"]
mean_z = cesm[0].z
inputp = np.zeros(erai[0].p.shape)
for i in range(len(erai)):
print("Month {}".format(i + 1))
inputp[:] = erai[i].p[:]
temperature = erai[i].theta * units.exner(inputp)
for v in varlist:
if (v != "doy") and (v != "z"):
erai[i][v] = vertical_interp.interp(erai[i][v],
erai[i]["z"],
mean_z,
vartype=v,
inputt=temperature,
inputp=inputp)
erai[i]["z"] = mean_z
return erai
