Tutorial Datasets

The module melodies_monet.tutorial enables automatic downloading and caching of small[1] versions of the tutorial datasets. This functionality requires pooch, an optional dependency.

import xarray as xr

import melodies_monet as mm

mm.tutorial.example_ids

['wrfchem:racm_esrl',
 'wrfchem:racm_esrl_vcp',
 'wrfchem:racm_esrl_reg',
 'wrfchem:racm_esrl_vcp_reg',
 'airnow:2019-09',
 'airnow:2019-08',
 'airnow:2019-07',
 'airnow:2017-07',
 'camchem:fv',
 'camchem:se',
 'camchem:se_scrip',
 'ufsaqm:merge_0627_L1',
 'ufsaqm:merge_0627_L2',
 'ufsaqm:merge_0628_L1',
 'ufsaqm:model_data',
 'ufsaqm:AEROMMA',
 'ufsaqm:cmaq52_2023-06-24_20-21',
 'ufsaqm:cmaq54_2023-06-24_20-21',
 'ufschem:2017-07',
 'ufschem:2017-07_sfc',
 'ufschem:2023-08-01',
 'aeronet:2019-09',
 'aeronet:2019-08',
 'csn:2019_daily',
 'improve:2019_daily',
 'ncore:2019_daily',
 'gml-100m-ozonesondes:as-of-2024-02-09',
 'ish:2017-07',
 'ish-lite:2017-07',
 'uwy-sonde:2023-08-01']

The example IDs above can be used inside a control file to specify to use that dataset, downloading if necessary but otherwise loading from the pooch cache.

For example:

model:
  cam-chem:
    files: 'example:camchem:fv'

(for model)

obs:
  airnow:
    filename: 'example:airnow:2019-09'

(for obs)

Note that you can also use melodies_monet.tutorial.fetch_example() to load data directly.

fp = mm.tutorial.fetch_example("camchem:fv")
xr.open_dataset(fp)

Downloading data from 'https://csl.noaa.gov/groups/csl4/modeldata/melodies-monet/data/example_model_data/cesmfv_example/CAM_chem_merra2_FCSD_1deg_QFED_world_201909-01-09_small_sfc.nc' to file '/home/docs/.cache/pooch/f57b114fb465b23ee998209b50df7d9d-CAM_chem_merra2_FCSD_1deg_QFED_world_201909-01-09_small_sfc.nc'.

<xarray.Dataset> Size: 24MB
Dimensions:    (time: 36, lev: 1, lat: 192, lon: 288, ilev: 2, nbnd: 2)
Coordinates:
  * time       (time) datetime64[ns] 288B 2019-09-01T06:00:00 ... 2019-09-10
  * lev        (lev) float64 8B 992.5
  * lat        (lat) float64 2kB -90.0 -89.06 -88.12 -87.17 ... 88.12 89.06 90.0
  * lon        (lon) float64 2kB 0.0 1.25 2.5 3.75 ... 355.0 356.2 357.5 358.8
  * ilev       (ilev) float64 16B 985.0 1e+03
Dimensions without coordinates: nbnd
Data variables:
    O3         (time, lev, lat, lon) float32 8MB ...
    P0         float64 8B ...
    PM25       (time, lev, lat, lon) float32 8MB ...
    PS         (time, lat, lon) float32 8MB ...
    date       (time) int32 144B ...
    datesec    (time) int32 144B ...
    hyai       (ilev) float64 16B ...
    hyam       (lev) float64 8B ...
    hybi       (ilev) float64 16B ...
    hybm       (lev) float64 8B ...
    time_bnds  (time, nbnd) datetime64[ns] 576B ...
Attributes:
    Conventions:       CF-1.0
    source:            CAM
    case:              fmerra.2.1003.FCSD.f09.qfedcmip.56L.001.branch02
    logname:           buchholz
    host:              cheyenne3
    initial_file:      /glade/p/cesmdata/cseg/inputdata/atm/cam/inic/fv/f.e20...
    topography_file:   /glade/p/cesmdata/cseg/inputdata/atm/cam/met/MERRA2/0....
    model_doi_url:     https://doi.org/10.5065/D67H1H0V
    time_period_freq:  hour_6
    history:           Mon Feb 28 16:25:23 2022: ncks -7 -L 1 --baa=4 --ppc d...
    NCO:               netCDF Operators version 5.0.6 (Homepage = http://nco....

xarray.Dataset

• Dimensions:
  • time: 36
  • lev: 1
  • lat: 192
  • lon: 288
  • ilev: 2
  • nbnd: 2
• Coordinates: (5)
  • time
    (time)
    datetime64[ns]
    2019-09-01T06:00:00 ... 2019-09-10

    long_name :

    time

    bounds :

    time_bnds

    cell_methods :

    time: mean

    array(['2019-09-01T06:00:00.000000000', '2019-09-01T12:00:00.000000000',
           '2019-09-01T18:00:00.000000000', '2019-09-02T00:00:00.000000000',
           '2019-09-02T06:00:00.000000000', '2019-09-02T12:00:00.000000000',
           '2019-09-02T18:00:00.000000000', '2019-09-03T00:00:00.000000000',
           '2019-09-03T06:00:00.000000000', '2019-09-03T12:00:00.000000000',
           '2019-09-03T18:00:00.000000000', '2019-09-04T00:00:00.000000000',
           '2019-09-04T06:00:00.000000000', '2019-09-04T12:00:00.000000000',
           '2019-09-04T18:00:00.000000000', '2019-09-05T00:00:00.000000000',
           '2019-09-05T06:00:00.000000000', '2019-09-05T12:00:00.000000000',
           '2019-09-05T18:00:00.000000000', '2019-09-06T00:00:00.000000000',
           '2019-09-06T06:00:00.000000000', '2019-09-06T12:00:00.000000000',
           '2019-09-06T18:00:00.000000000', '2019-09-07T00:00:00.000000000',
           '2019-09-07T06:00:00.000000000', '2019-09-07T12:00:00.000000000',
           '2019-09-07T18:00:00.000000000', '2019-09-08T00:00:00.000000000',
           '2019-09-08T06:00:00.000000000', '2019-09-08T12:00:00.000000000',
           '2019-09-08T18:00:00.000000000', '2019-09-09T00:00:00.000000000',
           '2019-09-09T06:00:00.000000000', '2019-09-09T12:00:00.000000000',
           '2019-09-09T18:00:00.000000000', '2019-09-10T00:00:00.000000000'],
          dtype='datetime64[ns]')

  • lev
    (lev)
    float64
    992.5

    long_name :

    hybrid level at midpoints (1000*(A+B))

    units :

    hPa

    positive :

    down

    standard_name :

    atmosphere_hybrid_sigma_pressure_coordinate

    formula_terms :

    a: hyam b: hybm p0: P0 ps: PS

    array([992.500011])

  • lat
    (lat)
    float64
    -90.0 -89.06 -88.12 ... 89.06 90.0

    long_name :

    latitude

    units :

    degrees_north

    array([-90.      , -89.057592, -88.115183, -87.172775, -86.230366, -85.287958,
           -84.34555 , -83.403141, -82.460733, -81.518325, -80.575916, -79.633508,
           -78.691099, -77.748691, -76.806283, -75.863874, -74.921466, -73.979058,
           -73.036649, -72.094241, -71.151832, -70.209424, -69.267016, -68.324607,
           -67.382199, -66.439791, -65.497382, -64.554974, -63.612565, -62.670157,
           -61.727749, -60.78534 , -59.842932, -58.900524, -57.958115, -57.015707,
           -56.073298, -55.13089 , -54.188482, -53.246073, -52.303665, -51.361257,
           -50.418848, -49.47644 , -48.534031, -47.591623, -46.649215, -45.706806,
           -44.764398, -43.82199 , -42.879581, -41.937173, -40.994764, -40.052356,
           -39.109948, -38.167539, -37.225131, -36.282723, -35.340314, -34.397906,
           -33.455497, -32.513089, -31.570681, -30.628272, -29.685864, -28.743455,
           -27.801047, -26.858639, -25.91623 , -24.973822, -24.031414, -23.089005,
           -22.146597, -21.204188, -20.26178 , -19.319372, -18.376963, -17.434555,
           -16.492147, -15.549738, -14.60733 , -13.664921, -12.722513, -11.780105,
           -10.837696,  -9.895288,  -8.95288 ,  -8.010471,  -7.068063,  -6.125654,
            -5.183246,  -4.240838,  -3.298429,  -2.356021,  -1.413613,  -0.471204,
             0.471204,   1.413613,   2.356021,   3.298429,   4.240838,   5.183246,
             6.125654,   7.068063,   8.010471,   8.95288 ,   9.895288,  10.837696,
            11.780105,  12.722513,  13.664921,  14.60733 ,  15.549738,  16.492147,
            17.434555,  18.376963,  19.319372,  20.26178 ,  21.204188,  22.146597,
            23.089005,  24.031414,  24.973822,  25.91623 ,  26.858639,  27.801047,
            28.743455,  29.685864,  30.628272,  31.570681,  32.513089,  33.455497,
            34.397906,  35.340314,  36.282723,  37.225131,  38.167539,  39.109948,
            40.052356,  40.994764,  41.937173,  42.879581,  43.82199 ,  44.764398,
            45.706806,  46.649215,  47.591623,  48.534031,  49.47644 ,  50.418848,
            51.361257,  52.303665,  53.246073,  54.188482,  55.13089 ,  56.073298,
            57.015707,  57.958115,  58.900524,  59.842932,  60.78534 ,  61.727749,
            62.670157,  63.612565,  64.554974,  65.497382,  66.439791,  67.382199,
            68.324607,  69.267016,  70.209424,  71.151832,  72.094241,  73.036649,
            73.979058,  74.921466,  75.863874,  76.806283,  77.748691,  78.691099,
            79.633508,  80.575916,  81.518325,  82.460733,  83.403141,  84.34555 ,
            85.287958,  86.230366,  87.172775,  88.115183,  89.057592,  90.      ])

  • lon
    (lon)
    float64
    0.0 1.25 2.5 ... 356.2 357.5 358.8

    long_name :

    longitude

    units :

    degrees_east

    array([  0.  ,   1.25,   2.5 , ..., 356.25, 357.5 , 358.75], shape=(288,))

  • ilev
    (ilev)
    float64
    985.0 1e+03

    long_name :

    hybrid level at interfaces (1000*(A+B))

    units :

    hPa

    positive :

    down

    standard_name :

    atmosphere_hybrid_sigma_pressure_coordinate

    formula_terms :

    a: hyai b: hybi p0: P0 ps: PS

    array([ 985.000021, 1000.      ])

• Data variables: (11)
  • O3
    (time, lev, lat, lon)
    float32
    ...

    mdims :

    1

    units :

    mol/mol

    long_name :

    O3 concentration

    cell_methods :

    time: mean

    QuantizeGranularBitRoundNumberOfSignificantDigits :

    5

    [1990656 values with dtype=float32]

  • P0
    ()
    float64
    ...

    long_name :

    reference pressure

    units :

    Pa

    QuantizeGranularBitRoundNumberOfSignificantDigits :

    5

    [1 values with dtype=float64]

  • PM25
    (time, lev, lat, lon)
    float32
    ...

    mdims :

    1

    units :

    kg/m3

    long_name :

    PM2.5 concentration

    cell_methods :

    time: mean

    QuantizeGranularBitRoundNumberOfSignificantDigits :

    5

    [1990656 values with dtype=float32]

  • PS
    (time, lat, lon)
    float32
    ...

    units :

    Pa

    long_name :

    Surface pressure

    cell_methods :

    time: mean

    QuantizeGranularBitRoundNumberOfSignificantDigits :

    5

    [1990656 values with dtype=float32]

  • date
    (time)
    int32
    ...

    long_name :

    current date (YYYYMMDD)

    cell_methods :

    time: mean

    [36 values with dtype=int32]

  • datesec
    (time)
    int32
    ...

    long_name :

    current seconds of current date

    cell_methods :

    time: mean

    [36 values with dtype=int32]

  • hyai
    (ilev)
    float64
    ...

    long_name :

    hybrid A coefficient at layer interfaces

    QuantizeGranularBitRoundNumberOfSignificantDigits :

    5

    [2 values with dtype=float64]

  • hyam
    (lev)
    float64
    ...

    long_name :

    hybrid A coefficient at layer midpoints

    QuantizeGranularBitRoundNumberOfSignificantDigits :

    5

    [1 values with dtype=float64]

  • hybi
    (ilev)
    float64
    ...

    long_name :

    hybrid B coefficient at layer interfaces

    QuantizeGranularBitRoundNumberOfSignificantDigits :

    5

    [2 values with dtype=float64]

  • hybm
    (lev)
    float64
    ...

    long_name :

    hybrid B coefficient at layer midpoints

    QuantizeGranularBitRoundNumberOfSignificantDigits :

    5

    [1 values with dtype=float64]

  • time_bnds
    (time, nbnd)
    datetime64[ns]
    ...

    long_name :

    time interval endpoints

    cell_methods :

    time: mean

    [72 values with dtype=datetime64[ns]]

• Attributes: (11)

  Conventions :

  CF-1.0

  source :

  CAM

  case :

  fmerra.2.1003.FCSD.f09.qfedcmip.56L.001.branch02

  logname :

  buchholz

  host :

  cheyenne3

  initial_file :

  /glade/p/cesmdata/cseg/inputdata/atm/cam/inic/fv/f.e20.FCSD.f09_f09_mg17.cesm2.1-exp002.001.cam.i.2005-01-01-00000_c180801.nc

  topography_file :

  /glade/p/cesmdata/cseg/inputdata/atm/cam/met/MERRA2/0.9x1.25/fv_0.9x1.25_nc3000_Nsw042_Nrs008_Co060_Fi001_ZR_sgh30_24km_GRNL_MERRA2_c171218.nc

  model_doi_url :

  https://doi.org/10.5065/D67H1H0V

  time_period_freq :

  hour_6

  history :

  Mon Feb 28 16:25:23 2022: ncks -7 -L 1 --baa=4 --ppc default=5 -d lev,-1 -d ilev,-2,-1 CAM_chem_merra2_FCSD_1deg_QFED_world_201909-01-09_small.nc -o CAM_chem_merra2_FCSD_1deg_QFED_world_201909-01-09_small_sfc.nc Fri Feb 25 15:19:44 2022: ncrcat /glade/scratch/buchholz/tmp/fmerra.2.1003.FCSD.f09.qfedcmip.56L.001.branch02.cam.h1.2019-09-01-21600.nc /glade/scratch/buchholz/tmp/fmerra.2.1003.FCSD.f09.qfedcmip.56L.001.branch02.cam.h1.2019-09-02-21600.nc /glade/scratch/buchholz/tmp/fmerra.2.1003.FCSD.f09.qfedcmip.56L.001.branch02.cam.h1.2019-09-03-21600.nc /glade/scratch/buchholz/tmp/fmerra.2.1003.FCSD.f09.qfedcmip.56L.001.branch02.cam.h1.2019-09-04-21600.nc /glade/scratch/buchholz/tmp/fmerra.2.1003.FCSD.f09.qfedcmip.56L.001.branch02.cam.h1.2019-09-05-21600.nc /glade/scratch/buchholz/tmp/fmerra.2.1003.FCSD.f09.qfedcmip.56L.001.branch02.cam.h1.2019-09-06-21600.nc /glade/scratch/buchholz/tmp/fmerra.2.1003.FCSD.f09.qfedcmip.56L.001.branch02.cam.h1.2019-09-07-21600.nc /glade/scratch/buchholz/tmp/fmerra.2.1003.FCSD.f09.qfedcmip.56L.001.branch02.cam.h1.2019-09-08-21600.nc /glade/scratch/buchholz/tmp/fmerra.2.1003.FCSD.f09.qfedcmip.56L.001.branch02.cam.h1.2019-09-09-21600.nc /glade/scratch/buchholz/tmp/fmerra.2.1003.FCSD.f09.qfedcmip.56L.001.cam.h1.201909.nc Fri Feb 25 15:19:30 2022: ncks -v date,datesec,time,lat,lon,hyam,hybm,hyai,hybi,P0,PS,O3,PM25 /glade/campaign/acom/acom-da/CAM_chem_output/fmerra.2.1003.FCSD.f09.qfedcmip.56L.001.branch02/atm/boundary_conditions/2019/fmerra.2.1003.FCSD.f09.qfedcmip.56L.001.branch02.cam.h1.2019-09-01-21600.nc /glade/scratch/buchholz/tmp/fmerra.2.1003.FCSD.f09.qfedcmip.56L.001.branch02.cam.h1.2019-09-01-21600.nc

  NCO :

  netCDF Operators version 5.0.6 (Homepage = http://nco.sf.net, Code = http://github.com/nco/nco)

---

[1]

Only a few variables included, levels limited to surface or near-surface, NCO compression applied. Full versions are also available via https://csl.noaa.gov/groups/csl4/modeldata/melodies-monet/.