cesm_racmo23_rnet.py 9.06 KB
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# coding=utf-8

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import os
import Ngl
import numpy as np
import numpy.ma as ma

from netCDF4 import Dataset

from livvkit.util import elements as el


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describe = """
Average of the summer (June-July-August; JJA) average net radiation (W m^-2) 
over Greenland for every summer (June-July-August; JJA) from 1980--1999 
for CESM (left) and RACMO 2.3 (middle), and the difference between them (right; CESM - 
RACMO 2.3). The black solid lines denote the 0, 1000, 2000, and 3000 meter 
Greenland ice sheet elevation contours as seen by the models (CESM's contours 
shown in the difference plot). 
"""
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def make_plot(config, out_path='.'):
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    # ---------------- Data source in TITAN ------------------------
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    f_cism = os.path.join(config['cism_data'], 'Greenland_5km_v1.1_SacksRev_c110629.nc')
    f_cesm_lnd_climo_jja = os.path.join(config['cesm_lnd_climos'],
                                        'b.e10.BG20TRCN.f09_g16.002_JJA_196006_200508_climo.nc')
    f_racmo_swsn_jja = os.path.join(config['racmo_data'],
                                    'racmo23_GRN_monthly.swsn.1980-1999.JJA.nc')
    f_racmo_swsn_jja_remapped = os.path.join(config['racmo_data'],
                                             'racmo23_GRN_monthly.swsn.1980-1999.remap2cesm.JJA.nc')
    f_racmo_lwsn_jja = os.path.join(config['racmo_data'],
                                    'racmo23_GRN_monthly.lwsn.1980-1999.JJA.nc')
    f_racmo_lwsn_jja_remapped = os.path.join(config['racmo_data'],
                                             'racmo23_GRN_monthly.lwsn.1980-1999.remap2cesm.JJA.nc')
    f_racmo_mask = os.path.join(config['racmo_data'], 'RACMO23_masks_ZGRN11.nc')
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    # --------------------------------------------------------------

    img_list = []

    # f_cism get the following, matrixsize[301,561]
    # usrf(0,:,:), lat(0,:,:), lon(0,:,:)
    # Goal: plot 3 figures, radiation overlaying on elevation usrf

    # read f_cism, elevation 5km CESM
    # adding the [:] transform the variable to type numpy.ndarray
    ncid0 = Dataset(f_cism)
    usrf = ncid0.variables['usrf'][0, :, :]
    lat = ncid0.variables['lat'][0, :, :]
    lon = ncid0.variables['lon'][0, :, :]

    # read f_cesm_lnd_climo_jja, CESM varialbes
    ncid1 = Dataset(f_cesm_lnd_climo_jja)
    fsa = ncid1.variables['FSA'][0, :, :]
    lat1 = ncid1.variables['lat'][:]
    lon1 = ncid1.variables['lon'][:]

    fira = ncid1.variables['FIRA'][0, :, :]
    rnet_cesm = fsa - fira

    # use gris as a mask to mask fsa array
    gris_mask = ncid1.variables['gris_mask'][0, :, :]
    gris_mask = ma.masked_equal(gris_mask, 0)

    rnet_cesm_mask = ma.masked_array(rnet_cesm, mask=gris_mask.mask)
    rnet_cesm = rnet_cesm_mask

    # read input_file2, RACMO variables
    ncid21 = Dataset(f_racmo_swsn_jja)
    swsn = ncid21.variables['swsn'][0, :, :]

    ncid22 = Dataset(f_racmo_lwsn_jja)
    lwsn = ncid22.variables['lwsn'][0, :, :]

    rnet = swsn + lwsn

    # read f_racmo_mask, the lat/lon for RACMO data
    ncid4 = Dataset(f_racmo_mask)
    lat4 = ncid4.variables['lat'][:]
    lon4 = ncid4.variables['lon'][:]
    racmo_elev = ncid4.variables['Topography'][0, 0, :, :]

    # Use gris as a mask to mask fsa array.
    gris_mask = ncid4.variables['GrIS_mask'][:]
    gris_mask = ma.masked_equal(gris_mask, 0)

    rnet_mask = ma.masked_array(rnet, mask=gris_mask.mask)
    rnet = rnet_mask

    # read input_file3, the remapped RACMO file to calculate difference
    ncid31 = Dataset(f_racmo_swsn_jja_remapped)
    remap_swsn = ncid31.variables['swsn'][0, :, :]

    ncid32 = Dataset(f_racmo_lwsn_jja_remapped)
    remap_lwsn = ncid32.variables['lwsn'][0, :, :]

    remap_rnet = remap_swsn + remap_lwsn

    diff = rnet_cesm - remap_rnet

    # print(np.max(diff))
    # print(np.min(diff))

    # ------- PLOT --------
    #  Open a workstation for drawing the plots
    wkres = Ngl.Resources()
    # wkres.wkColorMap = "matlab_jet"
    wkres.wkColorMap = "BlueWhiteOrangeRed"
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    # wkres.wkOrientation = "portrait"  # "portrait" or "landscape"
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    wks_type = "png"
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    wks_img = str(os.path.join(out_path, "CESM_RACMO23_rnet_JJA"))
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    wks = Ngl.open_wks(wks_type, wks_img, wkres)

    # --- for the map -------
    # Define plotting area, Greenland
    mres = Ngl.Resources()
    mres.nglDraw = False  # Don't draw individual plots
    mres.nglFrame = False  # Don't advance frame.

    mres.pmTickMarkDisplayMode = "Never"  # Turn off map tickmarks.
    mres.mpGridAndLimbOn = False  # Turn off grid and limb lines.
    mres.mpProjection = "Aitoff"
    mres.mpLimitMode = "LatLon"  # limit map via lat/lon, to zoom in
    mres.mpCenterLatF = 70.  # map area
    mres.mpCenterLonF = -44.
    mres.mpMinLatF = 57.
    mres.mpMaxLatF = 85.
    mres.mpMinLonF = -55.
    mres.mpMaxLonF = -30.
    mres.mpOutlineOn = False
    mres.mpFillOn = False
    mres.mpPerimOn = True  # add box around map

    # --- for the rnet contour of CESM -------
    res1 = Ngl.Resources()
    res1.nglDraw = False  # Don't draw individual plots
    res1.nglFrame = False  # Don't advance frame.
    res1.cnLineLabelsOn = False
    res1.cnFillOn = True
    res1.cnLinesOn = False
    res1.cnLineLabelsOn = False
    res1.cnFillMode = "RasterFill"
    res1.cnLevelSelectionMode = "ExplicitLevels"
    res1.cnLevels = np.arange(-20, 100, 20)
    res1.lbLabelBarOn = True  # Turn on labelbar.
    res1.lbLabelFontHeightF = 0.04
    # res1.pmLabelBarOrthogonalPosF = -0.05

    res1.sfXArray = lon1
    res1.sfYArray = lat1

    # --- for the rnet contour of RACMO -------
    res2 = Ngl.Resources()
    res2.nglDraw = False  # Don't draw individual plots
    res2.nglFrame = False  # Don't advance frame.
    res2.cnLineLabelsOn = False
    res2.cnFillOn = True
    res2.cnLinesOn = False
    res2.cnLineLabelsOn = False
    res2.cnFillMode = "RasterFill"
    res2.cnLevelSelectionMode = "ExplicitLevels"
    res2.cnLevels = np.arange(-20, 100, 20)
    res2.lbLabelBarOn = True  # Turn on labelbar.
    res2.lbOrientation = "Vertical"  # Verticle labelbar
    # res2.pmLabelBarHeightF    = 0.5         # Change height of labelbar
    # res2.pmLabelBarWidthF     = 0.2           # Change width of labelbar
    # res2.pmLabelBarOrthogonalPosF = -0.02      # Move labelbar closer to plot
    res2.lbLabelFontHeightF = 0.04  # Make fonts smaller.

    res2.sfXArray = lon4
    res2.sfYArray = lat4

    # --- for the rnet contour of CESM-RACMO -------
    res3 = Ngl.Resources()
    res3.nglDraw = False  # Don't draw individual plots
    res3.nglFrame = False  # Don't advance frame.
    res3.cnLineLabelsOn = False
    res3.cnFillOn = True
    res3.cnLinesOn = False
    res3.cnLineLabelsOn = False
    res3.cnFillMode = "RasterFill"
    res3.cnLevelSelectionMode = "ExplicitLevels"
    res3.cnLevels = np.arange(-80, 40, 20)
    res3.lbLabelBarOn = True  # Turn on labelbar.
    res3.lbOrientation = "Vertical"  # Verticle labelbar
    res3.lbLabelFontHeightF = 0.04  # Make fonts smaller.

    res3.sfXArray = lon1
    res3.sfYArray = lat1

    # ---- for the elevation -------
    sres = Ngl.Resources()
    sres.nglDraw = False  # Don't draw individual plots
    sres.nglFrame = False  # Don't advance frame.
    sres.cnFillOn = False
    sres.cnLinesOn = True
    sres.cnLineLabelsOn = False
    sres.cnLevelSelectionMode = "ExplicitLevels"
    sres.cnLevels = [0, 1000, 2000, 3000]
    sres.sfXArray = lon
    sres.sfYArray = lat

    # ---- for the elevation of RACMO -------
    sres1 = Ngl.Resources()
    sres1.nglDraw = False  # Don't draw individual plots
    sres1.nglFrame = False  # Don't advance frame.
    sres1.cnFillOn = False
    sres1.cnLinesOn = True
    sres1.cnLineLabelsOn = False
    sres1.cnLevelSelectionMode = "ExplicitLevels"
    sres1.cnLevels = [0, 1000, 2000, 3000]
    sres1.sfXArray = lon4
    sres1.sfYArray = lat4

    # ---- Overlay plots, each one has its own ID
    # overlay ice on base map, and then overlay elevation on ice
    # usrf is elevation of 5km CESM, racmo_elev is elevation of RACMO
    usrf_plot1 = Ngl.contour(wks, usrf, sres)
    usrf_plot2 = Ngl.contour(wks, racmo_elev, sres1)
    usrf_plot3 = Ngl.contour(wks, usrf, sres)

    rnet_cesm_plot = Ngl.contour(wks, rnet_cesm, res1)
    rnet_plot = Ngl.contour(wks, rnet, res2)
    diff_plot = Ngl.contour(wks, diff, res3)

    # Creat multiple figures and draw, which now contains the elevation and radiation
    # "[1,3]" indicates 1 row, 3 columns.
    map_title = ["CESM, R~B3~net", "RACMO, R~B3~net", "CESM-RACMO, R~B3~net"]

    nmap = 3
    plot = []
    for i in range(nmap):
        mres.tiMainString = map_title[i]
        plot.append(Ngl.map(wks, mres))

    # Overlay everything on the map plot.
    Ngl.overlay(plot[0], rnet_cesm_plot)
    Ngl.overlay(plot[0], usrf_plot1)

    Ngl.overlay(plot[1], rnet_plot)
    Ngl.overlay(plot[1], usrf_plot2)

    Ngl.overlay(plot[2], diff_plot)
    Ngl.overlay(plot[2], usrf_plot3)

    Ngl.panel(wks, plot, [1, nmap])

    img_link = os.path.join(os.path.basename(out_path),
                            os.path.basename(wks_img + '.' + wks_type))
    img_elem = el.image('CESM_RACMO23_rnet',
                        ' '.join(describe.split()),
                        img_link)
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    img_elem['Height'] = config['image_height']
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    img_list.append(img_elem)

    return img_list