def applymask(arg):
# load data
data_in = Dataset(arg.file_in)
data_out = Dataset(arg.file_out, 'r+')
# dimensions and time series
data_out.variables['x'][:] = data_in.variables['x'][160:400]
data_out.variables['y'][:] = data_in.variables['y'][:]
data_out.variables['z'][:] = data_in.variables['z'][:]
data_out.variables['time'][:] = data_in.variables['time'][:]
#data_out.variables['time'][1:] = data_in.variables['time'][1::] - data_in.variables['time'][1] + 2678400
data_out.variables['meanMeltRate'][:] = data_in.variables['meanMeltRate'][:]
data_out.variables['totalMeltFlux'][:] = data_in.variables['totalMeltFlux'][:]
data_out.variables['totalOceanVolume'][:] = data_in.variables['totalOceanVolume'][:]
data_out.variables['meanTemperature'][:] = data_in.variables['meanTemperature'][:]
data_out.variables['meanSalinity'][:] = data_in.variables['meanSalinity'][:]
# list of variables to be corrected
variables = ['temperatureYZ','salinityYZ']
for v in data_in.variables:
if len(data_in.variables[v][:].shape) > 1:
print('Processing variable ',v)
if v in variables:
tmp = data_in.variables[v][:]
data_out.variables[v][:] = tmp
else:
tmp = data_in.variables[v][:]
new_tmp = tmp[:,:,160:400]
data_out.variables[v][:] = new_tmp
else:
print('Skipping.. \n')
# mask bathymetry
print('Masking bathymetry...\n')
bat = data_in.variables['bathymetry'][:,:,160:400]
bottomSalinity = data_in.variables['bottomSalinity'][:,:,160:400]
tm, jm, im = bat.shape
for t in range(tm):
bat[t,:] = np.ma.masked_where(bottomSalinity[t,:].mask == True, bat[t,:])
data_out.variables['bathymetry'][:,:,:] = bat[:,:,:]
# : mask zero values
print('Masking iceDraft...\n')
iceDraft = data_in.variables['iceDraft'][:,:,160:400]
for t in range(tm):
iceDraft[t,:] = np.ma.masked_where(bottomSalinity[t,:].mask == True, iceDraft[t,:])
data_out.variables['iceDraft'][:,:,:] = iceDraft[:,:,:]
# change attributes
data_out.Author = 'Gustavo Marques ([email protected])'
data_out.Created = datetime.now().isoformat()
data_out.sync()
data_out.close()
data_in.close()
print('Done!')
def create_nc(self, ncfile):
"""
Create the particle netcdf file
NetCDF variable and dimension names are consistent with partrac data.
"""
if self.verbose:
print '\nInitialising particle netcdf file: %s...\n' % ncfile
# Global Attributes
nc = Dataset(ncfile, 'w', format='NETCDF4_CLASSIC')
nc.Description = 'Particle trajectory file'
nc.Author = os.getenv('USER')
nc.Created = datetime.now().isoformat()
# Dimensions
nc.createDimension('ntrac', self.N)
nc.createDimension('nt', 0) # Unlimited
# Create variables
def create_nc_var(name, dimensions, attdict, dtype='f8'):
tmp = nc.createVariable(name, dtype, dimensions)
for aa in attdict.keys():
tmp.setncattr(aa, attdict[aa])
basetimestr = 'seconds since %s'%(datetime.strftime(self.basetime,\
'%Y-%m-%d %H:%M:%S'))
create_nc_var('tp',('nt'),{'units':basetimestr\
,'long_name':"time at drifter locations"},dtype='f8')
create_nc_var('xp',('ntrac','nt'),{'units':'m',\
'long_name':"Easting coordinate of drifter",'time':'tp'},dtype='f8')
create_nc_var('yp',('ntrac','nt'),{'units':'m',\
'long_name':"Northing coordinate of drifter",'time':'tp'},dtype='f8')
create_nc_var('zp',('ntrac','nt'),{'units':'m',\
'long_name':"vertical position of drifter (negative is downward from surface)",'time':'tp'},dtype='f8')
if self.has_age:
create_nc_var('age',('ntrac','nt'),{'units':'seconds',\
'long_name':"Particle age",'time':'tp'},dtype='f8')
create_nc_var('agemax',('ntrac','nt'),{'units':'seconds',\
'long_name':"Maximum particle age",'time':'tp'},dtype='f8')
# Keep the pointer to the open file as an attribute
self._nc = nc
def create_nc(self,ncfile):
"""
Create the particle netcdf file
NetCDF variable and dimension names are consistent with partrac data.
"""
if self.verbose:
print '\nInitialising particle netcdf file: %s...\n'%ncfile
# Global Attributes
nc = Dataset(ncfile, 'w', format='NETCDF4_CLASSIC')
nc.Description = 'Particle trajectory file'
nc.Author = os.getenv('USER')
nc.Created = datetime.now().isoformat()
# Dimensions
nc.createDimension('ntrac', self.N)
nc.createDimension('nt', 0) # Unlimited
# Create variables
def create_nc_var( name, dimensions, attdict, dtype='f8'):
tmp=nc.createVariable(name, dtype, dimensions)
for aa in attdict.keys():
tmp.setncattr(aa,attdict[aa])
basetimestr = 'seconds since %s'%(datetime.strftime(self.basetime,\
'%Y-%m-%d %H:%M:%S'))
create_nc_var('tp',('nt'),{'units':basetimestr\
,'long_name':"time at drifter locations"},dtype='f8')
create_nc_var('xp',('ntrac','nt'),{'units':'m',\
'long_name':"Easting coordinate of drifter",'time':'tp'},dtype='f8')
create_nc_var('yp',('ntrac','nt'),{'units':'m',\
'long_name':"Northing coordinate of drifter",'time':'tp'},dtype='f8')
create_nc_var('zp',('ntrac','nt'),{'units':'m',\
'long_name':"vertical position of drifter (negative is downward from surface)",'time':'tp'},dtype='f8')
if self.has_age:
create_nc_var('age',('ntrac','nt'),{'units':'seconds',\
'long_name':"Particle age",'time':'tp'},dtype='f8')
create_nc_var('agemax',('ntrac','nt'),{'units':'seconds',\
'long_name':"Maximum particle age",'time':'tp'},dtype='f8')
# Keep the pointer to the open file as an attribute
self._nc = nc
def initParticleNC(self,outfile,Np,age=False):
"""
Export the grid variables to a netcdf file
"""
import os
if self.verbose:
print '\nInitialising particle netcdf file: %s...\n'%outfile
# Global Attributes
nc = Dataset(outfile, 'w', format='NETCDF4_CLASSIC')
nc.Description = 'Particle trajectory file'
nc.Author = os.getenv('USER')
nc.Created = datetime.now().isoformat()
#tseas = self.time_sec[1] - self.time_sec[0]
#nsteps = np.floor(tseas/self.dt)
#nc.nsteps = '%f (number of linear interpolation steps in time between model outputs)'%nsteps
#nc.tseas = '%d (Time step (seconds) between model outputs'%tseas
#nc.dt = '%f (Particle model time steps [seconds])'%self.dt
nc.dataset_location = '%s'%self.ncfile
# Dimensions
nc.createDimension('ntrac', Np)
nc.createDimension('nt', 0) # Unlimited
# Create variables
def create_nc_var( name, dimensions, attdict, dtype='f8'):
tmp=nc.createVariable(name, dtype, dimensions)
for aa in attdict.keys():
tmp.setncattr(aa,attdict[aa])
create_nc_var('tp',('nt'),{'units':'seconds since 1990-01-01 00:00:00','long_name':"time at drifter locations"},dtype='f8')
create_nc_var('xp',('ntrac','nt'),{'units':'m','long_name':"Easting coordinate of drifter",'time':'tp'},dtype='f8')
create_nc_var('yp',('ntrac','nt'),{'units':'m','long_name':"Northing coordinate of drifter",'time':'tp'},dtype='f8')
create_nc_var('zp',('ntrac','nt'),{'units':'m','long_name':"vertical position of drifter (negative is downward from surface)",'time':'tp'},dtype='f8')
if age:
create_nc_var('age',('ntrac','nt'),{'units':'seconds','long_name':"Particle age",'time':'tp'},dtype='f8')
create_nc_var('agemax',('ntrac','nt'),{'units':'seconds','long_name':"Maximum particle age",'time':'tp'},dtype='f8')
nc.close()
def initParticleNC(self,outfile,Np,age=False):
"""
Export the grid variables to a netcdf file
"""
import os
if self.verbose:
print '\nInitialising particle netcdf file: %s...\n'%outfile
# Global Attributes
nc = Dataset(outfile, 'w', format='NETCDF4_CLASSIC')
nc.Description = 'Particle trajectory file'
nc.Author = os.getenv('USER')
nc.Created = datetime.now().isoformat()
#tseas = self.time_sec[1] - self.time_sec[0]
#nsteps = np.floor(tseas/self.dt)
#nc.nsteps = '%f (number of linear interpolation steps in time between model outputs)'%nsteps
#nc.tseas = '%d (Time step (seconds) between model outputs'%tseas
#nc.dt = '%f (Particle model time steps [seconds])'%self.dt
nc.dataset_location = '%s'%self.ncfile
# Dimensions
nc.createDimension('ntrac', Np)
nc.createDimension('nt', 0) # Unlimited
# Create variables
def create_nc_var( name, dimensions, attdict, dtype='f8'):
tmp=nc.createVariable(name, dtype, dimensions)
for aa in attdict.keys():
tmp.setncattr(aa,attdict[aa])
create_nc_var('tp',('nt'),{'units':'seconds since 1990-01-01 00:00:00','long_name':"time at drifter locations"},dtype='f8')
create_nc_var('xp',('ntrac','nt'),{'units':'m','long_name':"Easting coordinate of drifter",'time':'tp'},dtype='f8')
create_nc_var('yp',('ntrac','nt'),{'units':'m','long_name':"Northing coordinate of drifter",'time':'tp'},dtype='f8')
create_nc_var('zp',('ntrac','nt'),{'units':'m','long_name':"vertical position of drifter (negative is downward from surface)",'time':'tp'},dtype='f8')
if age:
create_nc_var('age',('ntrac','nt'),{'units':'seconds','long_name':"Particle age",'time':'tp'},dtype='f8')
create_nc_var('agemax',('ntrac','nt'),{'units':'seconds','long_name':"Maximum particle age",'time':'tp'},dtype='f8')
nc.close()
import matplotlib.pyplot as plt
import numpy as np
from datetime import datetime
from netCDF4 import Dataset
from shutil import copyfile
N = 15
Nr = 4
nc = Dataset('Rivers.nc', 'w', format='NETCDF3_64BIT')
nc.Description = 'Discharges of major rivers'
nc.Author = 'Evgeny Ivanov'
nc.Created = datetime.now().strftime("%Y-%m-%d %H:%M:%S")
nc.title = 'Discharges of major rivers'
nc.createDimension('river_time', 365 * 10) ###
####nc.createDimension('river_time', 365)
nc.createDimension('xi_rho', 82)
nc.createDimension('xi_u', 81)
nc.createDimension('xi_v', 82)
nc.createDimension('eta_rho', 112)
nc.createDimension('eta_u', 112)
nc.createDimension('eta_v', 111)
nc.createDimension('s_rho', N)
nc.createDimension('river', Nr)
YY = []
MM = []
DD = []
QQ = []
for line in open('Maas_Dordrecht.txt', 'r').readlines():
def make_remap_grid_file(grd):
#create remap file
remap_filename = 'remap_grid_' + grd.name + '_t.nc'
nc = Dataset(remap_filename, 'w', format='NETCDF3_64BIT')
nc.Description = 'remap grid file for Mecrator'
nc.Author = 'Jheka'
nc.Created = datetime.now().strftime("%Y-%m-%d %H:%M:%S")
nc.title = grd.name
print "4"
lon_corner = grd.lon_vert
lat_corner = grd.lat_vert
grid_center_lon = grd.lon_t.flatten()
grid_center_lat = grd.lat_t.flatten()
Mp, Lp = grd.lon_t.shape
grid_imask = grd.mask_t[0,:].flatten()
grid_size = Lp * Mp
grid_corner_lon = np.zeros((grid_size, 4))
grid_corner_lat = np.zeros((grid_size, 4))
k = 0
for j in range(Mp-2):
for i in range(Lp-2):
#print i,j
grid_corner_lon[k,0] = lon_corner[j,i]
grid_corner_lat[k,0] = lat_corner[j,i]
grid_corner_lon[k,1] = lon_corner[j,i+1]
grid_corner_lat[k,1] = lat_corner[j,i+1]
grid_corner_lon[k,2] = lon_corner[j+1,i+1]
grid_corner_lat[k,2] = lat_corner[j+1,i+1]
grid_corner_lon[k,3] = lon_corner[j+1,i]
grid_corner_lat[k,3] = lat_corner[j+1,i]
k = k + 1
#Write netcdf file
nc.createDimension('grid_size', grid_size)
nc.createDimension('grid_corners', 4)
nc.createDimension('grid_rank', 2)
nc.createVariable('grid_dims', 'i4', ('grid_rank'))
nc.variables['grid_dims'].long_name = 'grid size along x and y axis'
nc.variables['grid_dims'].units = 'None'
nc.variables['grid_dims'][:] = [(Lp, Mp)]
nc.createVariable('grid_center_lon', 'f8', ('grid_size'))
nc.variables['grid_center_lon'].long_name = 'longitude of cell center'
nc.variables['grid_center_lon'].units = 'degrees'
nc.variables['grid_center_lon'][:] = grid_center_lon
nc.createVariable('grid_center_lat', 'f8', ('grid_size'))
nc.variables['grid_center_lat'].long_name = 'latitude of cell center'
nc.variables['grid_center_lat'].units = 'degrees'
nc.variables['grid_center_lat'][:] = grid_center_lat
nc.createVariable('grid_imask', 'i4', ('grid_size'))
nc.variables['grid_imask'].long_name = 'mask'
nc.variables['grid_imask'].units = 'None'
nc.variables['grid_imask'][:] = np.ones((Lp * Mp))
nc.createVariable('grid_corner_lon', 'f8', ('grid_size', 'grid_corners'))
nc.variables['grid_corner_lon'].long_name = 'longitude of cell corner'
nc.variables['grid_corner_lon'].units = 'degrees'
nc.variables['grid_corner_lon'][:] = grid_corner_lon
nc.createVariable('grid_corner_lat', 'f8', ('grid_size', 'grid_corners'))
nc.variables['grid_corner_lat'].long_name = 'latitude of cell corner'
nc.variables['grid_corner_lat'].units = 'degrees'
nc.variables['grid_corner_lat'][:] = grid_corner_lat
nc.close()
def writeNC(self, outfile, tt, x, y, Uwind, Vwind, Tair, Cloud, RH, Pair,
Rain):
"""
SUNTANS required wind file, this function creates the netcdf file
"""
Nstation = x.shape[0]
Nt = len(tt)
nc = Dataset(outfile, 'w', format='NETCDF4_CLASSIC')
nc.Description = 'SUNTANS History file'
nc.Author = ''
nc.Created = datetime.now().isoformat()
####Create dimensions####
nc.createDimension('NVwind', Nstation)
nc.createDimension('NTair', Nstation)
nc.createDimension('Nrain', Nstation)
nc.createDimension('NUwind', Nstation)
nc.createDimension('NPair', Nstation)
nc.createDimension('NRH', Nstation)
nc.createDimension('Ncloud', Nstation)
nc.createDimension('nt', Nt)
nc.close()
def create_nc_var(outfile,
name,
dimensions,
attdict,
dtype='f8',
zlib=False,
complevel=0,
fill_value=None):
nc = Dataset(outfile, 'a')
tmp = nc.createVariable(name,
dtype,
dimensions,
zlib=zlib,
complevel=complevel,
fill_value=fill_value)
for aa in attdict.keys():
tmp.setncattr(aa, attdict[aa])
#nc.variables[name][:] = var
nc.close()
####adding variables####
create_nc_var(outfile, 'x_Vwind', ('NVwind'), {
'long_name': 'Longitude at Vwind',
'units': 'degrees_north'
})
create_nc_var(outfile, 'y_Vwind', ('NVwind'), {
'long_name': 'Latitude at Vwind',
'units': 'degrees_east'
})
create_nc_var(outfile, 'z_Vwind', ('NVwind'), {
'long_name': 'Elevation at Vwind',
'units': 'm'
})
create_nc_var(outfile, 'x_Tair', ('NTair'), {
'long_name': 'Longitude at Tair',
'units': 'degrees_north'
})
create_nc_var(outfile, 'y_Tair', ('NTair'), {
'long_name': 'Latitude at Tair',
'units': 'degrees_east'
})
create_nc_var(outfile, 'z_Tair', ('NTair'), {
'long_name': 'Elevation at Tair',
'units': 'm'
})
create_nc_var(outfile, 'x_rain', ('Nrain'), {
'long_name': 'Longitude at rain',
'units': 'degrees_north'
})
create_nc_var(outfile, 'y_rain', ('Nrain'), {
'long_name': 'Latitude at rain',
'units': 'degrees_east'
})
create_nc_var(outfile, 'z_rain', ('Nrain'), {
'long_name': 'Elevation at rain',
'units': 'm'
})
create_nc_var(outfile, 'x_Uwind', ('NUwind'), {
'long_name': 'Longitude at Uwind',
'units': 'degrees_north'
})
create_nc_var(outfile, 'y_Uwind', ('NUwind'), {
'long_name': 'Latitude at Uwind',
'units': 'degrees_east'
})
create_nc_var(outfile, 'z_Uwind', ('NUwind'), {
'long_name': 'Elevation at Uwind',
'units': 'm'
})
create_nc_var(outfile, 'x_Pair', ('NPair'), {
'long_name': 'Longitude at Pair',
'units': 'degrees_north'
})
create_nc_var(outfile, 'y_Pair', ('NPair'), {
'long_name': 'Latitude at Pair',
'units': 'degrees_east'
})
create_nc_var(outfile, 'z_Pair', ('NPair'), {
'long_name': 'Elevation at Pair',
'units': 'm'
})
create_nc_var(outfile, 'x_RH', ('NRH'), {
'long_name': 'Longitude at RH',
'units': 'degrees_north'
})
create_nc_var(outfile, 'y_RH', ('NRH'), {
'long_name': 'Latitude at RH',
'units': 'degrees_east'
})
create_nc_var(outfile, 'z_RH', ('NRH'), {
'long_name': 'Elevation at RH',
'units': 'm'
})
create_nc_var(outfile, 'x_cloud', ('Ncloud'), {
'long_name': 'Longitude at cloud',
'units': 'degrees_north'
})
create_nc_var(outfile, 'y_cloud', ('Ncloud'), {
'long_name': 'Latitude at cloud',
'units': 'degrees_east'
})
create_nc_var(outfile, 'z_cloud', ('Ncloud'), {
'long_name': 'Elevation at cloud',
'units': 'm'
})
create_nc_var(outfile, 'Time', ('nt'), {
'units': 'seconds since 1990-01-01 00:00:00',
'long_name': 'time'
})
create_nc_var(
outfile, 'Vwind', ('nt', 'NVwind'), {
'units': 'm s-1',
'long_name': 'Northward wind velocity component',
'coordinates': 'x_Vwind,y_Vwind'
})
create_nc_var(
outfile, 'Tair', ('nt', 'NTair'), {
'units': 'Celsius',
'long_name': 'Air Temperature',
'coordinates': 'x_Tair,y_Tair'
})
create_nc_var(
outfile, 'rain', ('nt', 'Nrain'), {
'units': 'kg m2 s-1',
'long_name': 'rain fall rate',
'coordinates': 'x_rain,y_rain'
})
create_nc_var(
outfile, 'Uwind', ('nt', 'NUwind'), {
'long_name': 'Eastward wind velocity component',
'coordinates': 'x_Uwind,y_Uwind',
'units': 'm s-1'
})
create_nc_var(
outfile, 'Pair', ('nt', 'NPair'), {
'units': 'hPa',
'long_name': 'Air Pressure',
'coordinates': 'x_Pair,y_Pair'
})
create_nc_var(
outfile, 'RH', ('nt', 'NRH'), {
'units': 'percent',
'long_name': 'Relative Humidity',
'coordinates': 'x_RH,y_RH'
})
create_nc_var(
outfile, 'cloud', ('nt', 'Ncloud'), {
'units': 'dimensionless',
'long_name': 'Cloud cover fraction',
'coordinates': 'x_cloud,y_cloud'
})
z = np.ones([Nstation]) * 2
## change time units
time_new = SecondsSince(tt)
# ##Tair, rain, Pair, RH, cloud are set to be constant due to a lack of information
# Tair = np.ones([Nt, Nstation])*30.0
# rain = np.ones([Nt, Nstation])*0.0
# Pair = np.ones([Nt, Nstation])*1010.0
# RH = np.ones([Nt, Nstation])*50.0
# cloud = np.ones([Nt, Nstation])*0.0
######Now writting the variables######
nc = Dataset(outfile, 'a')
nc.variables['x_Vwind'][:] = x
nc.variables['y_Vwind'][:] = y
nc.variables['z_Vwind'][:] = z
nc.variables['x_Tair'][:] = x
nc.variables['y_Tair'][:] = y
nc.variables['z_Tair'][:] = z
nc.variables['x_rain'][:] = x
nc.variables['y_rain'][:] = y
nc.variables['z_rain'][:] = z
nc.variables['x_Uwind'][:] = x
nc.variables['y_Uwind'][:] = y
nc.variables['z_Uwind'][:] = z
nc.variables['x_Pair'][:] = x
nc.variables['y_Pair'][:] = y
nc.variables['z_Pair'][:] = z
nc.variables['x_RH'][:] = x
nc.variables['y_RH'][:] = y
nc.variables['z_RH'][:] = z
nc.variables['x_cloud'][:] = x
nc.variables['y_cloud'][:] = y
nc.variables['z_cloud'][:] = z
nc.variables['Time'][:] = time_new
nc.variables['Vwind'][:] = Vwind
nc.variables['Tair'][:] = Tair
nc.variables['rain'][:] = Rain
nc.variables['Uwind'][:] = Uwind
nc.variables['Pair'][:] = Pair
nc.variables['RH'][:] = RH
nc.variables['cloud'][:] = Cloud
print "Ending writing variables into netcdf file !!!"
nc.close()
def writeNC(self, outfile):
"""
This function is used to create the netcdf file
"""
print 'under developing'
####create netcdf File####
nc = Dataset(outfile, 'w', format='NETCDF4_CLASSIC')
nc.Description = 'SUNTANS History file'
nc.Author = ''
nc.Created = datetime.now().isoformat()
####Create dimensions####
nc.createDimension('NVwind', self.Nstation)
nc.createDimension('NTair', self.Nstation)
nc.createDimension('Nrain', self.Nstation)
nc.createDimension('NUwind', self.Nstation)
nc.createDimension('NPair', self.Nstation)
nc.createDimension('NRH', self.Nstation)
nc.createDimension('Ncloud', self.Nstation)
nc.createDimension('nt', self.Nt)
nc.close()
####adding variables####
self.create_nc_var(outfile,'x_Vwind',('NVwind'),{'long_name':'Longitude at Vwind','units':'degrees_north'})
self.create_nc_var(outfile,'y_Vwind',('NVwind'),{'long_name':'Latitude at Vwind','units':'degrees_east'})
self.create_nc_var(outfile,'z_Vwind',('NVwind'),{'long_name':'Elevation at Vwind','units':'m'})
self.create_nc_var(outfile,'x_Tair',('NTair'),{'long_name':'Longitude at Tair','units':'degrees_north'})
self.create_nc_var(outfile,'y_Tair',('NTair'),{'long_name':'Latitude at Tair','units':'degrees_east'})
self.create_nc_var(outfile,'z_Tair',('NTair'),{'long_name':'Elevation at Tair','units':'m'})
self.create_nc_var(outfile,'x_rain',('Nrain'),{'long_name':'Longitude at rain','units':'degrees_north'})
self.create_nc_var(outfile,'y_rain',('Nrain'),{'long_name':'Latitude at rain','units':'degrees_east'})
self.create_nc_var(outfile,'z_rain',('Nrain'),{'long_name':'Elevation at rain','units':'m'})
self.create_nc_var(outfile,'x_Uwind',('NUwind'),{'long_name':'Longitude at Uwind','units':'degrees_north'})
self.create_nc_var(outfile,'y_Uwind',('NUwind'),{'long_name':'Latitude at Uwind','units':'degrees_east'})
self.create_nc_var(outfile,'z_Uwind',('NUwind'),{'long_name':'Elevation at Uwind','units':'m'})
self.create_nc_var(outfile,'x_Pair',('NPair'),{'long_name':'Longitude at Pair','units':'degrees_north'})
self.create_nc_var(outfile,'y_Pair',('NPair'),{'long_name':'Latitude at Pair','units':'degrees_east'})
self.create_nc_var(outfile,'z_Pair',('NPair'),{'long_name':'Elevation at Pair','units':'m'})
self.create_nc_var(outfile,'x_RH',('NRH'),{'long_name':'Longitude at RH','units':'degrees_north'})
self.create_nc_var(outfile,'y_RH',('NRH'),{'long_name':'Latitude at RH','units':'degrees_east'})
self.create_nc_var(outfile,'z_RH',('NRH'),{'long_name':'Elevation at RH','units':'m'})
self.create_nc_var(outfile,'x_cloud',('Ncloud'),{'long_name':'Longitude at cloud','units':'degrees_north'})
self.create_nc_var(outfile,'y_cloud',('Ncloud'),{'long_name':'Latitude at cloud','units':'degrees_east'})
self.create_nc_var(outfile,'z_cloud',('Ncloud'),{'long_name':'Elevation at cloud','units':'m'})
self.create_nc_var(outfile,'Time',('nt'),{'units':'seconds since 1990-01-01 00:00:00','long_name':'time'})
self.create_nc_var(outfile,'Vwind',('nt','NVwind'),{'units':'m s-1','long_name':'Northward wind velocity component','coordinates':'x_Vwind,y_Vwind'})
self.create_nc_var(outfile,'Tair',('nt','NTair'),{'units':'Celsius','long_name':'Air Temperature','coordinates':'x_Tair,y_Tair'})
self.create_nc_var(outfile,'rain',('nt','Nrain'),{'units':'kg m2 s-1','long_name':'rain fall rate','coordinates':'x_rain,y_rain'})
self.create_nc_var(outfile,'Uwind',('nt','NUwind'),{'long_name':'Eastward wind velocity component','coordinates':'x_Uwind,y_Uwind','units':'m s-1'})
self.create_nc_var(outfile,'Pair',('nt','NPair'),{'units':'hPa','long_name':'Air Pressure','coordinates':'x_Pair,y_Pair'})
self.create_nc_var(outfile,'RH',('nt','NRH'),{'units':'percent','long_name':'Relative Humidity','coordinates':'x_RH,y_RH'})
self.create_nc_var(outfile,'cloud',('nt','Ncloud'),{'units':'dimensionless','long_name':'Cloud cover fraction','coordinates':'x_cloud,y_cloud'})
######Now writting the variables######
nc = Dataset(outfile,'a')
nc.variables['x_Vwind'][:]=self.lat
nc.variables['y_Vwind'][:]=self.lon
nc.variables['z_Vwind'][:]=self.z
nc.variables['x_Tair'][:]=self.lat
nc.variables['y_Tair'][:]=self.lon
nc.variables['z_Tair'][:]=self.z
nc.variables['x_rain'][:]=self.lat
nc.variables['y_rain'][:]=self.lon
nc.variables['z_rain'][:]=self.z
nc.variables['x_Uwind'][:]=self.lat
nc.variables['y_Uwind'][:]=self.lon
nc.variables['z_Uwind'][:]=self.z
nc.variables['x_Pair'][:]=self.lat
nc.variables['y_Pair'][:]=self.lon
nc.variables['z_Pair'][:]=self.z
nc.variables['x_RH'][:]=self.lat
nc.variables['y_RH'][:]=self.lon
nc.variables['z_RH'][:]=self.z
nc.variables['x_cloud'][:]=self.lat
nc.variables['y_cloud'][:]=self.lon
nc.variables['z_cloud'][:]=self.z
nc.variables['Time'][:]=self.time
nc.variables['Vwind'][:]=self.Vwind
nc.variables['Tair'][:]=self.Tair
nc.variables['rain'][:]=self.rain
nc.variables['Uwind'][:]=self.Uwind
nc.variables['Pair'][:]=self.Pair
nc.variables['RH'][:]=self.RH
nc.variables['cloud'][:]=self.cloud
print "Ending writing variables into netcdf file !!!"
nc.close()