def write_initial_positions(index, drifter, grid):
bathy, nav_lon, nav_lat = tidetools.get_bathy_data(grid)
xind, yind = tidetools.find_closest_model_point(drifter['lon'][index],
drifter['lat'][index],
nav_lon,
nav_lat,
bathy,
allow_land=True)
xp, yp = find_start_point(nav_lon, nav_lat, xind, yind, drifter, index)
initial_conditions = np.ones((81, 5))
# longitude index
initial_conditions[0:-1:3, 0] = yp
initial_conditions[1:-1:3, 0] = yp - 2.5
initial_conditions[2:81:3, 0] = yp + 2.5
# latitude index
for i in range(0, 81, 9):
initial_conditions[0 + i:3 + i, 1] = xp + 0.5
initial_conditions[0 + 3 + i:3 + 3 + i, 1] = xp - 2
initial_conditions[0 + 6 + i:3 + 6 + i, 1] = xp + 3
# depth
initial_conditions[0:27, 2] = -1.5
initial_conditions[27:54, 2] = -2.5
initial_conditions[54:81, 2] = -3.5
# time
tp = (drifter['time'][index].hour + drifter['time'][index].minute / 60. +
drifter['time'][index].second / 3600.)
for i in range(0, 81, 27):
initial_conditions[0 + i:9 + i, 3] = tp
initial_conditions[0 + 9 + i:9 + 9 + i, 3] = tp + 0.5
initial_conditions[0 + 18 + i:9 + 18 + i, 3] = tp - 0.5
np.savetxt('initial_positions.txt', initial_conditions, fmt='%10.5f')
def retrieve_nowcast_data(lon, lat, date, obs_depth, field, grid_B, mesh_mask):
"""Gather nowcast field daily mean, min and max at lat, lon on date,
interpolated to obs_depth.
:arg lon: longitude point
:type lon: real number
:arg lat: latitude point
:type lat: real number
:arg date: simulation date
:type date: datetime
:arg obs_depth: array of depths to be interpolated to
:type obs_depth: numpy array
:arg field: name of variable to load, e.g 'vosaline' or 'votemper'
:type field: string
:arg grid_B: model bathymetry
:type grid_B: netCDF4 object
:arg mesh_mask: model mesh mask
:type mesh_mask: netCDF4 object
:returns: model_d_interp, model_max, model_min - numpy arrays
"""
# look up model grid point
bathy, lons, lats = tidetools.get_bathy_data(grid_B)
j, i = tidetools.find_closest_model_point(lon, lat, lons, lats, bathy)
# loading
grid_d = results_dataset('1d', 'grid_T', date)
grid_h = results_dataset('1h', 'grid_T', date)
model_d = grid_d.variables[field][0, :, j, i]
model_h = grid_h.variables[field][:, :, j, i]
gdep = mesh_mask.variables['gdept'][0, :, j, i]
# masking
tmask = mesh_mask.variables['tmask'][:, :, j, i]
tmask = 1 - tmask + np.zeros(model_h.shape)
model_d = np.ma.array(model_d, mask=tmask[0, :])
gdep_mask = np.ma.array(gdep, mask=tmask[0, :])
model_h = np.ma.array(model_h, mask=tmask)
# interpolate to observed depth
model_d_interp = comparisons.interpolate_depth(model_d, gdep_mask,
obs_depth)
model_h_interp = np.zeros((model_h.shape[0], len(obs_depth)))
for t in np.arange(model_h.shape[0]):
model_h_interp[t, :] = comparisons.interpolate_depth(
model_h[t, :], gdep_mask, obs_depth)
# daily max and min
model_max = np.max(model_h_interp, axis=0)
model_min = np.min(model_h_interp, axis=0)
return model_d_interp, model_max, model_min
def compare_JEMS_model(stn, sdt, edt, grid_B, results_home,
smin=5, smax=31, tmin=8, tmax=12):
"""Comparison between all JEMS T+S data in a date range and model nowcasts.
:arg stn: The JEMS station name
:type stn: string
:arg sdt: the start date of the date range
:type sdt: datetime object
:arg edt: the end date of the date range
:type edt: datetime object
:arg grid_B: the model bathymetry
:type grid_B: netCDF handle
:arg results_home: the path to the model results
:type results_home: string
:arg smin: minimum salinity for axis
:type smin: float
:arg smax: maximum salinity for axis
:type smax: float
:arg tmin: minimum temperature for axis
:type tmin: float
:arg tmax: maximum salinity for axis
:type tmax: float
:returns: figmap, fig - figure objects for the map and comaprisons plots
"""
# Observations
lat = SITES[stn]['lat']
lon = SITES[stn]['lon']
data = load_JEMS_csv(stn)
data = isolate_dates(data, sdt, edt)
data = data.groupby('date')
# Model grid
X = grid_B.variables['nav_lon'][:]
Y = grid_B.variables['nav_lat'][:]
bathy = grid_B.variables['Bathymetry'][:]
[j, i] = tidetools.find_closest_model_point(lon, lat, X, Y, bathy)
# Set up loop and figure
num = data.ngroups
fig, axs = plt.subplots(num, 2, figsize=(10, 4*num))
try:
for day, axS, axT in zip(data.groups, axs[:, 0], axs[:, 1]):
plot_comparisons(day, axS, axT, results_home, data, stn, j, i)
axS.set_xlim([smin, smax])
axS.set_ylim([SITES[stn]['depth'], 0])
axT.set_xlim([tmin, tmax])
axT.set_ylim([SITES[stn]['depth'], 0])
axS.set_xlabel('Salinity (psu)')
axT.set_xlabel('Temperature (deg C)')
except IndexError:
day = data.groups.keys()[0]
axS = axs[0]
axT = axs[1]
plot_comparisons(day, axS, axT, results_home, data, stn, j, i)
axS.set_xlim([smin, smax])
axS.set_ylim([SITES[stn]['depth'], 0])
axT.set_xlim([tmin, tmax])
axT.set_ylim([SITES[stn]['depth'], 0])
axS.set_xlabel('Salinity (psu)')
axT.set_xlabel('Temperature (deg C)')
# map
figmap, ax = plt.subplots(1, 1)
viz_tools.plot_coastline(ax, grid_B, coords='map')
ax.plot(lon, lat, 'o')
ax.set_title(stn)
return figmap, fig
def compare_cast_hourly(month,
model_year,
field,
data_obs,
model_path,
xmin=-124,
xmax=-122,
ymin=48,
ymax=50,
zmin=0,
zmax=300,
vmin=10,
vmax=32):
"""Comparison between model and observations at every cast in a given month
Model daily average is compared witth houlry std errors
"""
# Load model grid
grid = '/data/nsoontie/MEOPAR/NEMO-forcing/grid/bathy_meter_SalishSea2.nc'
f = nc.Dataset(grid)
bathy = f.variables['Bathymetry'][:]
X = f.variables['nav_lon'][:]
Y = f.variables['nav_lat'][:]
mesh = '/data/nsoontie/MEOPAR/NEMO-forcing/grid/mesh_mask_SalishSea2.nc'
g = nc.Dataset(mesh)
depth_mod = g.variables['gdept_0'][0, :]
# Model variables
if field == 'Salinity':
model_field = 'vosaline'
elif field == 'Temperature':
model_field = 'votemper'
# plot obs and model
data_m = data_obs[data_obs['Month'] == month]
num_casts = len(data_m.index)
fig, axs = plt.subplots(num_casts, 2, figsize=(10, 3.5 * num_casts))
cast = 0
for dep_obs, var_obs, lon, lat, day, year in zip(
data_m['Depth'], data_m[field], data_m['Longitude'],
data_m['Latitude'], data_m['Day'], data_m['Year']):
# model grid points
try:
ax = axs[cast, 0]
axm = axs[cast, 1]
except IndexError:
ax = axs[0]
axm = axs[1]
j, i = tidetools.find_closest_model_point(lon, lat, X, Y, bathy)
date = datetime.datetime(year, month, day)
if date >= FIRST_NOWCAST:
hourly_grid = get_hourly_grid(date, model_path)
depth_mod = hourly_grid.variables['deptht'][:]
max_h, min_h, var_plot = calculate_hourly_ext(
model_field, hourly_grid, j, i)
else:
var_model = early_model_data(date, j, i, '1h', 'grid_T',
model_field, model_path)
var_plot = np.mean(var_model, axis=0)
min_h = np.min(var_model, axis=0)
max_h = np.max(var_model, axis=0)
# plot model
ax.plot(var_plot, depth_mod, '-b', label='daily mean', alpha=0.5)
ax.plot(max_h, depth_mod, 'k--', label='daily max')
ax.plot(min_h, depth_mod, 'k:', label='daily min')
# plot observations and location on map
ax.plot(var_obs, dep_obs, '-*r', label='obs')
axm.plot(lon, lat, '*r')
# Set plot axis and labels
ax.set_ylim([zmax, zmin])
ax.set_xlim([vmin, vmax])
ax.set_ylabel('Depth [m]')
ax.set_xlabel(field)
# plot mode coastline
viz_tools.plot_coastline(axm, f, coords='map')
axm.set_ylim([ymin, ymax])
axm.set_xlim([xmin, xmax])
axm.set_title('{}-{}-{}'.format(year, month, day))
# legend
ax.legend(loc=0)
cast = cast + 1
return fig
def compare_cast_model(month,
model_year,
field,
data_obs,
model_path,
xmin=-124,
xmax=-122,
ymin=48,
ymax=50,
zmin=0,
zmax=300,
vmin=10,
vmax=32,
x=7):
"""Comparison between model and observations at every cast in a given month
Model is compared x days before and after cast date
"""
# Load model grid
grid = '/data/nsoontie/MEOPAR/NEMO-forcing/grid/bathy_meter_SalishSea2.nc'
f = nc.Dataset(grid)
bathy = f.variables['Bathymetry'][:]
X = f.variables['nav_lon'][:]
Y = f.variables['nav_lat'][:]
# date ranges based on month and model_year
date = datetime.datetime(model_year, month, 1)
sdt = date - datetime.timedelta(days=31)
edt = date + datetime.timedelta(days=60)
# Model variables and nowcast/spinup?
if field == 'Salinity':
model_field = 'vosaline'
elif field == 'Temperatute':
model_field = 'votemper'
# Is this a nowcast?
if model_year == 2014 or model_year == 2015:
nowcast_flag = True
else:
nowcast_flag = False
# load model variables
depth_mod, var_mod, dates_mod = load_model(model_path,
sdt,
edt,
model_field,
nowcast_flag=nowcast_flag)
# plot obs and model
data_m = data_obs[data_obs['Month'] == month]
num_casts = len(data_m.index)
fig, axs = plt.subplots(num_casts, 2, figsize=(10, 3.5 * num_casts))
cast = 0
for dep_obs, var_obs, lon, lat, day, year in zip(
data_m['Depth'], data_m[field], data_m['Longitude'],
data_m['Latitude'], data_m['Day'], data_m['Year']):
# model grid points
try:
ax = axs[cast, 0]
axm = axs[cast, 1]
except IndexError:
ax = axs[0]
axm = axs[1]
[j, i] = tidetools.find_closest_model_point(lon, lat, X, Y, bathy)
# model time index
t_ind = []
for count, date in enumerate(dates_mod):
if date.day == day:
if date.month == month:
t_ind.append(count)
t_ind.append(count - x) # x days earlier
t_ind.append(count + x) # x days later
labels = [
'same day', '{} days earlier'.format(x), '{} days later'.format(x)
]
colors = ['b', 'g', 'k']
for ii, t in enumerate(t_ind):
try:
var_plot = var_mod[t, :, j, i]
var_plot = np.ma.masked_values(var_plot, 0)
if j:
ax.plot(var_plot,
depth_mod,
'-b',
color=colors[ii],
label=labels[ii],
alpha=0.5)
except IndexError:
print('No model data for {}/{}, '
'{}'.format(day, month, labels[ii]))
# plot observations and location on map
ax.plot(var_obs, dep_obs, '-*r', label='obs')
axm.plot(lon, lat, '*r')
# Set plot axis and labels
ax.set_ylim([zmax, zmin])
ax.set_xlim([vmin, vmax])
ax.set_ylabel('Depth [m]')
ax.set_xlabel(field)
# plot mode coastline
viz_tools.plot_coastline(axm, f, coords='map')
axm.set_ylim([ymin, ymax])
axm.set_xlim([xmin, xmax])
axm.set_title('{}-{}-{}'.format(year, month, day))
# legend
ax.legend(loc=0)
cast = cast + 1
return fig
def compare_model_obs(month,
model_year,
field,
data_obs,
model_path,
xmin=-124,
xmax=-122,
ymin=48,
ymax=50,
zmin=0,
zmax=300,
vmin=10,
vmax=32):
"""Compares the observations from WOD with model output on the same day
and at a close grid point.
Comparisons are during single month.
field is compared ('Temperature' or 'Salinity' )
Observations stored in data_obs (DataFrame)
Model_path defines where the model data is stored(can be nowcast or spinup)
"""
# Load model grid
grid = '/data/nsoontie/MEOPAR/NEMO-forcing/grid/bathy_meter_SalishSea2.nc'
f = nc.Dataset(grid)
bathy = f.variables['Bathymetry'][:]
X = f.variables['nav_lon'][:]
Y = f.variables['nav_lat'][:]
fig, [ax, axm] = plt.subplots(1, 2, figsize=(10, 3))
# date ranges based on month and model_year
sdt = datetime.datetime(model_year, month, 1)
edt = sdt + datetime.timedelta(days=31)
# Model variables and nowcast/spinup?
if field == 'Salinity':
model_field = 'vosaline'
elif field == 'Temperatute':
model_field = 'votemper'
# Is this a nowcast?
if model_year == 2014 or model_year == 2015:
nowcast_flag = True
title = 'Nowcast'
else:
nowcast_flag = False
title = 'Spinup'
# load model variables
depth_mod, var_mod, dates_mod = load_model(model_path,
sdt,
edt,
model_field,
nowcast_flag=nowcast_flag)
# plot obs and model
data_m = data_obs[data_obs['Month'] == month]
for dep_obs, var_obs, lon, lat, day in zip(data_m['Depth'], data_m[field],
data_m['Longitude'],
data_m['Latitude'],
data_m['Day']):
# model grid points
[j, i] = tidetools.find_closest_model_point(lon, lat, X, Y, bathy)
# model time index
t_ind = []
for count, date in enumerate(dates_mod):
if date.month == month:
if date.day == day:
t_ind = count
var_plot = var_mod[t_ind, :, j, i]
var_plot = np.ma.masked_values(var_plot, 0)
ax.plot(var_obs, dep_obs, '-*r', label='obs', alpha=0.5)
if j:
try:
ax.plot(var_plot, depth_mod, '-ob', label='model', alpha=0.5)
except ValueError:
print('No model data for {}/{}'.format(day, month))
# plot location on map
axm.plot(lon, lat, '*r')
# Set plot axis and labels
ax.set_ylim([zmax, zmin])
ax.set_xlim([vmin, vmax])
ax.set_title(title)
ax.set_ylabel('Depth [m]')
ax.set_xlabel(field)
# plot mode coastline
viz_tools.plot_coastline(axm, f, coords='map')
axm.set_ylim([ymin, ymax])
axm.set_xlim([xmin, xmax])
axm.set_title('Month {}'.format(month))
# fake the legend
simObs, = ax.plot(-1, 0, 'r*')
simMod, = ax.plot(-1, 0, 'bo')
ax.legend([simObs, simMod], ['obs', 'model'], loc=0)
return fig
