Dfs0 - CMEMS in-situ data

Copernicus Marine provides access to a wide range of model and in-situ data. In this example we will look at how to access the in-situ data and convert it to a MIKE IO dataset.

import pandas as pd
import xarray as xr
import mikeio

fino = xr.open_dataset("../../data/NO_TS_MO_FINO1_202209.nc")
fino

<xarray.Dataset> Size: 3MB
Dimensions:      (TIME: 2879, LATITUDE: 2879, LONGITUDE: 2879, DEPTH: 7,
                  POSITION: 2879)
Coordinates:
  * TIME         (TIME) datetime64[ns] 23kB 2022-09-01 ... 2022-09-30T23:31:5...
  * LATITUDE     (LATITUDE) float32 12kB 54.0 54.0 54.0 54.0 ... 54.0 54.0 54.0
  * LONGITUDE    (LONGITUDE) float32 12kB 6.583 6.583 6.583 ... 6.583 6.583
    DEPH         (TIME, DEPTH) float32 81kB ...
Dimensions without coordinates: DEPTH, POSITION
Data variables: (12/22)
    DEPH_QC      (TIME, DEPTH) float32 81kB ...
    TIME_QC      (TIME) float32 12kB ...
    POSITION_QC  (POSITION) float32 12kB ...
    TEMP         (TIME, DEPTH) float64 161kB ...
    TEMP_QC      (TIME, DEPTH) float32 81kB ...
    VHM0         (TIME, DEPTH) float64 161kB ...
    ...           ...
    VTPK_DM      (TIME, DEPTH) object 161kB ...
    VTZA         (TIME, DEPTH) float64 161kB ...
    VTZA_QC      (TIME, DEPTH) float32 81kB ...
    VPED         (TIME, DEPTH) float64 161kB ...
    VPED_QC      (TIME, DEPTH) float32 81kB ...
    VPED_DM      (TIME, DEPTH) object 161kB ...
Attributes: (12/46)
    platform_code:                  FINO1
    platform_name:                  
    data_mode:                      M
    title:                          NWS - NRT in situ Observations
    summary:                        Oceanographic data from North West Shelf
    naming_authority:               Copernicus Marine In Situ
    ...                             ...
    doi:                            
    pi_name:                        
    qc_manual:                      OceanSITES User's Manual v1.2
    date_update:                    2022-10-07T05:39:40Z
    history:                        2022-10-01T18:04:25Z : Creation; 2022-10-...
    wmo_inst_type:                  

xarray.Dataset

• Dimensions:
  • TIME: 2879
  • LATITUDE: 2879
  • LONGITUDE: 2879
  • DEPTH: 7
  • POSITION: 2879
• Coordinates: (4)
  • TIME
    (TIME)
    datetime64[ns]
    2022-09-01 ... 2022-09-30T23:31:...

    long_name :

    Time

    standard_name :

    time

    valid_min :

    -90000.0

    valid_max :

    90000.0

    uncertainty :

    comment :

    axis :

    T

    ancillary_variables :

    TIME_QC

    array(['2022-09-01T00:00:00.000000000', '2022-09-01T00:02:00.000000000',
           '2022-09-01T00:30:00.000000000', ..., '2022-09-30T23:02:00.000000000',
           '2022-09-30T23:30:00.000000000', '2022-09-30T23:31:59.999999744'],
          dtype='datetime64[ns]')

  • LATITUDE
    (LATITUDE)
    float32
    54.0 54.0 54.0 ... 54.0 54.0 54.0

    long_name :

    Latitude of each location

    standard_name :

    latitude

    units :

    degree_north

    valid_min :

    -90.0

    valid_max :

    90.0

    uncertainty :

    comment :

    axis :

    Y

    ancillary_variables :

    POSITION_QC

    array([54., 54., 54., ..., 54., 54., 54.], dtype=float32)

  • LONGITUDE
    (LONGITUDE)
    float32
    6.583 6.583 6.583 ... 6.583 6.583

    long_name :

    Longitude of each location

    standard_name :

    longitude

    units :

    degree_east

    valid_min :

    -180.0

    valid_max :

    180.0

    uncertainty :

    comment :

    axis :

    X

    ancillary_variables :

    POSITION_QC

    array([6.583333, 6.583333, 6.583333, ..., 6.583333, 6.583333, 6.583333],
          dtype=float32)

  • DEPH
    (TIME, DEPTH)
    float32
    ...

    long_name :

    Depth

    standard_name :

    depth

    units :

    m

    positive :

    down

    valid_min :

    -12000.0

    valid_max :

    12000.0

    uncertainty :

    comment :

    axis :

    Z

    reference :

    sea_level

    data_mode :

    R

    ancillary_variables :

    DEPH_QC

    [20153 values with dtype=float32]

• Data variables: (22)
  • DEPH_QC
    (TIME, DEPTH)
    float32
    ...

    long_name :

    Depth quality flag

    conventions :

    Copernicus Marine In Situ reference table 2

    valid_min :

    0

    valid_max :

    9

    flag_values :

    [0 1 2 3 4 5 6 7 8 9]

    flag_meanings :

    no_qc_performed good_data probably_good_data bad_data_that_are_potentially_correctable bad_data value_changed value_below_detection nominal_value interpolated_value missing_value

    [20153 values with dtype=float32]

  • TIME_QC
    (TIME)
    float32
    ...

    long_name :

    Time quality flag

    conventions :

    Copernicus Marine In Situ reference table 2

    valid_min :

    0

    valid_max :

    9

    flag_values :

    [0 1 2 3 4 5 6 7 8 9]

    flag_meanings :

    no_qc_performed good_data probably_good_data bad_data_that_are_potentially_correctable bad_data value_changed value_below_detection nominal_value interpolated_value missing_value

    [2879 values with dtype=float32]

  • POSITION_QC
    (POSITION)
    float32
    ...

    long_name :

    Position quality flag

    conventions :

    Copernicus Marine In Situ reference table 2

    valid_min :

    0

    valid_max :

    9

    flag_values :

    [0 1 2 3 4 5 6 7 8 9]

    flag_meanings :

    no_qc_performed good_data probably_good_data bad_data_that_are_potentially_correctable bad_data value_changed value_below_detection nominal_value interpolated_value missing_value

    [2879 values with dtype=float32]

  • TEMP
    (TIME, DEPTH)
    float64
    ...

    standard_name :

    sea_water_temperature

    units :

    degrees_C

    long_name :

    Sea temperature

    valid_min :

    -2000

    valid_max :

    32000

    comment :

    uncertainty :

    accuracy :

    precision :

    resolution :

    cell_methods :

    sensor_depth :

    0.0

    sensor_mount :

    sensor_orientation :

    data_mode :

    R

    ancillary_variables :

    TEMP_QC

    [20153 values with dtype=float64]

  • TEMP_QC
    (TIME, DEPTH)
    float32
    ...

    long_name :

    Sea temperature quality flag

    conventions :

    Copernicus Marine In Situ reference table 2

    valid_min :

    0

    valid_max :

    9

    flag_values :

    [0 1 2 3 4 5 6 7 8 9]

    flag_meanings :

    no_qc_performed good_data probably_good_data bad_data_that_are_potentially_correctable bad_data value_changed value_below_detection nominal_value interpolated_value missing_value

    [20153 values with dtype=float32]

  • VHM0
    (TIME, DEPTH)
    float64
    ...

    standard_name :

    sea_surface_wave_significant_height

    units :

    m

    long_name :

    Spectral significant wave height (Hm0)

    valid_min :

    1

    valid_max :

    25000

    comment :

    uncertainty :

    accuracy :

    precision :

    resolution :

    cell_methods :

    type_of_analysis :

    spectral analysis

    sensor_depth :

    0.0

    sensor_mount :

    sensor_orientation :

    data_mode :

    M

    ancillary_variables :

    VHM0_QC VHM0_DM

    [20153 values with dtype=float64]

  • VHM0_QC
    (TIME, DEPTH)
    float32
    ...

    long_name :

    Spectral significant wave height (Hm0) quality flag

    conventions :

    Copernicus Marine In Situ reference table 2

    valid_min :

    0

    valid_max :

    9

    flag_values :

    [0 1 2 3 4 5 6 7 8 9]

    flag_meanings :

    no_qc_performed good_data probably_good_data bad_data_that_are_potentially_correctable bad_data value_changed value_below_detection nominal_value interpolated_value missing_value

    [20153 values with dtype=float32]

  • VHM0_DM
    (TIME, DEPTH)
    object
    ...

    long_name :

    Spectral significant wave height (Hm0) method of data processing

    conventions :

    Copernicus Marine In Situ reference table 1

    flag_values :

    R, A, D

    flag_meanings :

    real-time adjusted-in-real-time delayed-mode

    [20153 values with dtype=object]

  • VZMX
    (TIME, DEPTH)
    float64
    ...

    standard_name :

    sea_surface_wave_maximum_height

    units :

    m

    long_name :

    Maximum zero crossing wave height (Hmax)

    valid_min :

    0

    valid_max :

    40000

    comment :

    uncertainty :

    accuracy :

    precision :

    resolution :

    cell_methods :

    type_of_analysis :

    zero crossing

    sensor_depth :

    0.0

    sensor_mount :

    sensor_orientation :

    data_mode :

    M

    ancillary_variables :

    VZMX_QC VZMX_DM

    [20153 values with dtype=float64]

  • VZMX_QC
    (TIME, DEPTH)
    float32
    ...

    long_name :

    Maximum zero crossing wave height (Hmax) quality flag

    conventions :

    Copernicus Marine In Situ reference table 2

    valid_min :

    0

    valid_max :

    9

    flag_values :

    [0 1 2 3 4 5 6 7 8 9]

    flag_meanings :

    no_qc_performed good_data probably_good_data bad_data_that_are_potentially_correctable bad_data value_changed value_below_detection nominal_value interpolated_value missing_value

    [20153 values with dtype=float32]

  • VZMX_DM
    (TIME, DEPTH)
    object
    ...

    long_name :

    Maximum zero crossing wave height (Hmax) method of data processing

    conventions :

    Copernicus Marine In Situ reference table 1

    flag_values :

    R, A, D

    flag_meanings :

    real-time adjusted-in-real-time delayed-mode

    [20153 values with dtype=object]

  • VTM02
    (TIME, DEPTH)
    float64
    ...

    standard_name :

    sea_surface_wave_mean_period_from_variance_spectral_density_second_frequency_moment

    units :

    s

    long_name :

    Spectral moments (0,2) wave period (Tm02)

    valid_min :

    1000

    valid_max :

    25000

    comment :

    uncertainty :

    accuracy :

    precision :

    resolution :

    cell_methods :

    type_of_analysis :

    spectral analysis

    sensor_depth :

    0.0

    sensor_mount :

    sensor_orientation :

    data_mode :

    M

    ancillary_variables :

    VTM02_QC VTM02_DM

    [20153 values with dtype=float64]

  • VTM02_QC
    (TIME, DEPTH)
    float32
    ...

    long_name :

    Spectral moments (0,2) wave period (Tm02) quality flag

    conventions :

    Copernicus Marine In Situ reference table 2

    valid_min :

    0

    valid_max :

    9

    flag_values :

    [0 1 2 3 4 5 6 7 8 9]

    flag_meanings :

    no_qc_performed good_data probably_good_data bad_data_that_are_potentially_correctable bad_data value_changed value_below_detection nominal_value interpolated_value missing_value

    [20153 values with dtype=float32]

  • VTM02_DM
    (TIME, DEPTH)
    object
    ...

    long_name :

    Spectral moments (0,2) wave period (Tm02) method of data processing

    conventions :

    Copernicus Marine In Situ reference table 1

    flag_values :

    R, A, D

    flag_meanings :

    real-time adjusted-in-real-time delayed-mode

    [20153 values with dtype=object]

  • VTPK
    (TIME, DEPTH)
    float64
    ...

    standard_name :

    sea_surface_wave_period_at_variance_spectral_density_maximum

    units :

    s

    long_name :

    Wave period at spectral peak / peak period (Tp)

    valid_min :

    1000

    valid_max :

    30000

    comment :

    uncertainty :

    accuracy :

    precision :

    resolution :

    cell_methods :

    type_of_analysis :

    spectral analysis

    sensor_depth :

    0.0

    sensor_mount :

    sensor_orientation :

    data_mode :

    M

    ancillary_variables :

    VTPK_QC VTPK_DM

    [20153 values with dtype=float64]

  • VTPK_QC
    (TIME, DEPTH)
    float32
    ...

    long_name :

    Wave period at spectral peak / peak period (Tp) quality flag

    conventions :

    Copernicus Marine In Situ reference table 2

    valid_min :

    0

    valid_max :

    9

    flag_values :

    [0 1 2 3 4 5 6 7 8 9]

    flag_meanings :

    no_qc_performed good_data probably_good_data bad_data_that_are_potentially_correctable bad_data value_changed value_below_detection nominal_value interpolated_value missing_value

    [20153 values with dtype=float32]

  • VTPK_DM
    (TIME, DEPTH)
    object
    ...

    long_name :

    Wave period at spectral peak / peak period (Tp) method of data processing

    conventions :

    Copernicus Marine In Situ reference table 1

    flag_values :

    R, A, D

    flag_meanings :

    real-time adjusted-in-real-time delayed-mode

    [20153 values with dtype=object]

  • VTZA
    (TIME, DEPTH)
    float64
    ...

    standard_name :

    sea_surface_wave_mean_period

    units :

    s

    long_name :

    Average zero crossing wave period (Tz)

    valid_min :

    2000

    valid_max :

    25000

    comment :

    uncertainty :

    accuracy :

    precision :

    resolution :

    cell_methods :

    type_of_analysis :

    zero crossing

    sensor_depth :

    0.0

    sensor_mount :

    sensor_orientation :

    data_mode :

    R

    ancillary_variables :

    VTZA_QC

    [20153 values with dtype=float64]

  • VTZA_QC
    (TIME, DEPTH)
    float32
    ...

    long_name :

    Average zero crossing wave period (Tz) quality flag

    conventions :

    Copernicus Marine In Situ reference table 2

    valid_min :

    0

    valid_max :

    9

    flag_values :

    [0 1 2 3 4 5 6 7 8 9]

    flag_meanings :

    no_qc_performed good_data probably_good_data bad_data_that_are_potentially_correctable bad_data value_changed value_below_detection nominal_value interpolated_value missing_value

    [20153 values with dtype=float32]

  • VPED
    (TIME, DEPTH)
    float64
    ...

    standard_name :

    sea_surface_wave_from_direction_at_variance_spectral_density_maximum

    units :

    degree

    long_name :

    Wave principal direction at spectral peak

    valid_min :

    0

    valid_max :

    360000

    comment :

    uncertainty :

    accuracy :

    precision :

    resolution :

    cell_methods :

    type_of_analysis :

    spectral analysis

    sensor_depth :

    0.0

    sensor_mount :

    sensor_orientation :

    data_mode :

    M

    ancillary_variables :

    VPED_QC VPED_DM

    [20153 values with dtype=float64]

  • VPED_QC
    (TIME, DEPTH)
    float32
    ...

    long_name :

    Wave principal direction at spectral peak quality flag

    conventions :

    Copernicus Marine In Situ reference table 2

    valid_min :

    0

    valid_max :

    9

    flag_values :

    [0 1 2 3 4 5 6 7 8 9]

    flag_meanings :

    no_qc_performed good_data probably_good_data bad_data_that_are_potentially_correctable bad_data value_changed value_below_detection nominal_value interpolated_value missing_value

    [20153 values with dtype=float32]

  • VPED_DM
    (TIME, DEPTH)
    object
    ...

    long_name :

    Wave principal direction at spectral peak method of data processing

    conventions :

    Copernicus Marine In Situ reference table 1

    flag_values :

    R, A, D

    flag_meanings :

    real-time adjusted-in-real-time delayed-mode

    [20153 values with dtype=object]

• Indexes: (3)
  • TIME
    PandasIndex

    PandasIndex(DatetimeIndex([          '2022-09-01 00:00:00',
                             '2022-09-01 00:02:00',
                             '2022-09-01 00:30:00',
                             '2022-09-01 00:32:00',
                             '2022-09-01 01:00:00',
                   '2022-09-01 01:01:59.999999744',
                             '2022-09-01 01:30:00',
                             '2022-09-01 01:32:00',
                             '2022-09-01 02:00:00',
                             '2022-09-01 02:02:00',
                   ...
                             '2022-09-30 21:30:00',
                             '2022-09-30 21:32:00',
                             '2022-09-30 22:00:00',
                   '2022-09-30 22:01:59.999999744',
                             '2022-09-30 22:30:00',
                             '2022-09-30 22:32:00',
                             '2022-09-30 23:00:00',
                             '2022-09-30 23:02:00',
                             '2022-09-30 23:30:00',
                   '2022-09-30 23:31:59.999999744'],
                  dtype='datetime64[ns]', name='TIME', length=2879, freq=None))

  • LATITUDE
    PandasIndex

    PandasIndex(Index([54.0, 54.0, 54.0, 54.0, 54.0, 54.0, 54.0, 54.0, 54.0, 54.0,
           ...
           54.0, 54.0, 54.0, 54.0, 54.0, 54.0, 54.0, 54.0, 54.0, 54.0],
          dtype='float32', name='LATITUDE', length=2879))

  • LONGITUDE
    PandasIndex

    PandasIndex(Index([6.5833330154418945, 6.5833330154418945, 6.5833330154418945,
           6.5833330154418945, 6.5833330154418945, 6.5833330154418945,
           6.5833330154418945, 6.5833330154418945, 6.5833330154418945,
           6.5833330154418945,
           ...
           6.5833330154418945, 6.5833330154418945, 6.5833330154418945,
           6.5833330154418945, 6.5833330154418945, 6.5833330154418945,
           6.5833330154418945, 6.5833330154418945, 6.5833330154418945,
           6.5833330154418945],
          dtype='float32', name='LONGITUDE', length=2879))

• Attributes: (46)

  platform_code :

  FINO1

  platform_name :

  data_mode :

  M

  title :

  NWS - NRT in situ Observations

  summary :

  Oceanographic data from North West Shelf

  naming_authority :

  Copernicus Marine In Situ

  id :

  NO_TS_MO_FINO1_202209

  wmo_platform_code :

  6201065

  ices_platform_code :

  source :

  mooring

  source_platform_category_code :

  48

  institution_edmo_code :

  3356

  institution :

  R and D centre Kiel University of Applied Sciences

  institution_references :

  www.fh-kiel-gmbh.de/en/

  site_code :

  comment :

  contact :

  cmems-service@bsh.de

  area :

  North Atlantic Ocean

  geospatial_lat_min :

  54.00000

  geospatial_lat_max :

  54.00000

  geospatial_lon_min :

  6.58333

  geospatial_lon_max :

  6.58333

  last_date_observation :

  2022-09-30T23:32:00Z

  last_latitude_observation :

  54.00000

  last_longitude_observation :

  6.58333

  geospatial_vertical_min :

  0.00000

  geospatial_vertical_max :

  25.00000

  time_coverage_start :

  2022-09-01T00:00:00Z

  time_coverage_end :

  2022-09-30T23:32:00Z

  cdm_data_type :

  timeSeries

  data_type :

  OceanSITES time-series data

  bottom_depth :

  format_version :

  1.4

  Conventions :

  CF-1.6 Copernicus-InSituTAC-FormatManual-1.42 Copernicus-InSituTAC-SRD-1.5 Copernicus-InSituTAC-ParametersList-3.2.1

  netcdf_version :

  netCDF-4 classic model

  references :

  http://marine.copernicus.eu http://www.marineinsitu.eu

  data_assembly_center :

  BSH

  update_interval :

  PT1H

  citation :

  These data were collected and made freely available by the Copernicus project and the programs that contribute to it

  distribution_statement :

  These data follow Copernicus standards; they are public and free of charge. User assumes all risk for use of data. User must display citation in any publication or product using data. User must contact PI prior to any commercial use of data.

  doi :

  pi_name :

  qc_manual :

  OceanSITES User's Manual v1.2

  date_update :

  2022-10-07T05:39:40Z

  history :

  2022-10-01T18:04:25Z : Creation; 2022-10-07T05:39:40Z, BSH North West Shelf PU: Monthly subset 202209 extracted from history file NO_TS_MO_FINO1.nc

  wmo_inst_type :

CMEMS in-situ data is provided in a standardised format.

Find out which variables we are interested in to extract:

data = [
    {
        "name": fino[var].name,
        "standard_name": fino[var].standard_name,
        "units": fino[var].units,
    }
    for var in fino.data_vars
    if hasattr(fino[var], "units")
]

pd.DataFrame(data)

	name	standard_name	units
0	TEMP	sea_water_temperature	degrees_C
1	VHM0	sea_surface_wave_significant_height	m
2	VZMX	sea_surface_wave_maximum_height	m
3	VTM02	sea_surface_wave_mean_period_from_variance_spe...	s
4	VTPK	sea_surface_wave_period_at_variance_spectral_d...	s
5	VTZA	sea_surface_wave_mean_period	s
6	VPED	sea_surface_wave_from_direction_at_variance_sp...	degree

The data have a DEPTH dimension, even though variables are only measured at a single level and doesn’t vary in time although the format allows for it.

I.e. temperature (TEMP) is available at level 1 (0.5 m)

fino.DEPH.plot.line(x="TIME")

fino['TEMP'].plot.line("-^",x='TIME')

fino['VHM0'].plot.line("-^",x='TIME')

Wave data are only available at the surface.

fino[['VHM0','VTZA','VPED']].isel(DEPTH=0)

<xarray.Dataset> Size: 104kB
Dimensions:  (TIME: 2879)
Coordinates:
  * TIME     (TIME) datetime64[ns] 23kB 2022-09-01 ... 2022-09-30T23:31:59.99...
    DEPH     (TIME) float32 12kB ...
Data variables:
    VHM0     (TIME) float64 23kB ...
    VTZA     (TIME) float64 23kB ...
    VPED     (TIME) float64 23kB ...
Attributes: (12/46)
    platform_code:                  FINO1
    platform_name:                  
    data_mode:                      M
    title:                          NWS - NRT in situ Observations
    summary:                        Oceanographic data from North West Shelf
    naming_authority:               Copernicus Marine In Situ
    ...                             ...
    doi:                            
    pi_name:                        
    qc_manual:                      OceanSITES User's Manual v1.2
    date_update:                    2022-10-07T05:39:40Z
    history:                        2022-10-01T18:04:25Z : Creation; 2022-10-...
    wmo_inst_type:                  

xarray.Dataset

• Dimensions:
  • TIME: 2879
• Coordinates: (2)
  • TIME
    (TIME)
    datetime64[ns]
    2022-09-01 ... 2022-09-30T23:31:...

    long_name :

    Time

    standard_name :

    time

    valid_min :

    -90000.0

    valid_max :

    90000.0

    uncertainty :

    comment :

    axis :

    T

    ancillary_variables :

    TIME_QC

    array(['2022-09-01T00:00:00.000000000', '2022-09-01T00:02:00.000000000',
           '2022-09-01T00:30:00.000000000', ..., '2022-09-30T23:02:00.000000000',
           '2022-09-30T23:30:00.000000000', '2022-09-30T23:31:59.999999744'],
          dtype='datetime64[ns]')

  • DEPH
    (TIME)
    float32
    ...

    long_name :

    Depth

    standard_name :

    depth

    units :

    m

    positive :

    down

    valid_min :

    -12000.0

    valid_max :

    12000.0

    uncertainty :

    comment :

    axis :

    Z

    reference :

    sea_level

    data_mode :

    R

    ancillary_variables :

    DEPH_QC

    [2879 values with dtype=float32]

• Data variables: (3)
  • VHM0
    (TIME)
    float64
    ...

    standard_name :

    sea_surface_wave_significant_height

    units :

    m

    long_name :

    Spectral significant wave height (Hm0)

    valid_min :

    1

    valid_max :

    25000

    comment :

    uncertainty :

    accuracy :

    precision :

    resolution :

    cell_methods :

    type_of_analysis :

    spectral analysis

    sensor_depth :

    0.0

    sensor_mount :

    sensor_orientation :

    data_mode :

    M

    ancillary_variables :

    VHM0_QC VHM0_DM

    [2879 values with dtype=float64]

  • VTZA
    (TIME)
    float64
    ...

    standard_name :

    sea_surface_wave_mean_period

    units :

    s

    long_name :

    Average zero crossing wave period (Tz)

    valid_min :

    2000

    valid_max :

    25000

    comment :

    uncertainty :

    accuracy :

    precision :

    resolution :

    cell_methods :

    type_of_analysis :

    zero crossing

    sensor_depth :

    0.0

    sensor_mount :

    sensor_orientation :

    data_mode :

    R

    ancillary_variables :

    VTZA_QC

    [2879 values with dtype=float64]

  • VPED
    (TIME)
    float64
    ...

    standard_name :

    sea_surface_wave_from_direction_at_variance_spectral_density_maximum

    units :

    degree

    long_name :

    Wave principal direction at spectral peak

    valid_min :

    0

    valid_max :

    360000

    comment :

    uncertainty :

    accuracy :

    precision :

    resolution :

    cell_methods :

    type_of_analysis :

    spectral analysis

    sensor_depth :

    0.0

    sensor_mount :

    sensor_orientation :

    data_mode :

    M

    ancillary_variables :

    VPED_QC VPED_DM

    [2879 values with dtype=float64]

• Indexes: (1)
  • TIME
    PandasIndex

    PandasIndex(DatetimeIndex([          '2022-09-01 00:00:00',
                             '2022-09-01 00:02:00',
                             '2022-09-01 00:30:00',
                             '2022-09-01 00:32:00',
                             '2022-09-01 01:00:00',
                   '2022-09-01 01:01:59.999999744',
                             '2022-09-01 01:30:00',
                             '2022-09-01 01:32:00',
                             '2022-09-01 02:00:00',
                             '2022-09-01 02:02:00',
                   ...
                             '2022-09-30 21:30:00',
                             '2022-09-30 21:32:00',
                             '2022-09-30 22:00:00',
                   '2022-09-30 22:01:59.999999744',
                             '2022-09-30 22:30:00',
                             '2022-09-30 22:32:00',
                             '2022-09-30 23:00:00',
                             '2022-09-30 23:02:00',
                             '2022-09-30 23:30:00',
                   '2022-09-30 23:31:59.999999744'],
                  dtype='datetime64[ns]', name='TIME', length=2879, freq=None))

• Attributes: (46)

  platform_code :

  FINO1

  platform_name :

  data_mode :

  M

  title :

  NWS - NRT in situ Observations

  summary :

  Oceanographic data from North West Shelf

  naming_authority :

  Copernicus Marine In Situ

  id :

  NO_TS_MO_FINO1_202209

  wmo_platform_code :

  6201065

  ices_platform_code :

  source :

  mooring

  source_platform_category_code :

  48

  institution_edmo_code :

  3356

  institution :

  R and D centre Kiel University of Applied Sciences

  institution_references :

  www.fh-kiel-gmbh.de/en/

  site_code :

  comment :

  contact :

  cmems-service@bsh.de

  area :

  North Atlantic Ocean

  geospatial_lat_min :

  54.00000

  geospatial_lat_max :

  54.00000

  geospatial_lon_min :

  6.58333

  geospatial_lon_max :

  6.58333

  last_date_observation :

  2022-09-30T23:32:00Z

  last_latitude_observation :

  54.00000

  last_longitude_observation :

  6.58333

  geospatial_vertical_min :

  0.00000

  geospatial_vertical_max :

  25.00000

  time_coverage_start :

  2022-09-01T00:00:00Z

  time_coverage_end :

  2022-09-30T23:32:00Z

  cdm_data_type :

  timeSeries

  data_type :

  OceanSITES time-series data

  bottom_depth :

  format_version :

  1.4

  Conventions :

  CF-1.6 Copernicus-InSituTAC-FormatManual-1.42 Copernicus-InSituTAC-SRD-1.5 Copernicus-InSituTAC-ParametersList-3.2.1

  netcdf_version :

  netCDF-4 classic model

  references :

  http://marine.copernicus.eu http://www.marineinsitu.eu

  data_assembly_center :

  BSH

  update_interval :

  PT1H

  citation :

  These data were collected and made freely available by the Copernicus project and the programs that contribute to it

  distribution_statement :

  These data follow Copernicus standards; they are public and free of charge. User assumes all risk for use of data. User must display citation in any publication or product using data. User must contact PI prior to any commercial use of data.

  doi :

  pi_name :

  qc_manual :

  OceanSITES User's Manual v1.2

  date_update :

  2022-10-07T05:39:40Z

  history :

  2022-10-01T18:04:25Z : Creation; 2022-10-07T05:39:40Z, BSH North West Shelf PU: Monthly subset 202209 extracted from history file NO_TS_MO_FINO1.nc

  wmo_inst_type :

df = fino[['VHM0','VTZA','VPED']].isel(DEPTH=0).to_dataframe()

The data are stored on the concurrent timesteps.

df[['VHM0','VTZA','VPED']].head()

	VHM0	VTZA	VPED
TIME
2022-09-01 00:00:00	NaN	4.12	NaN
2022-09-01 00:02:00	1.11	NaN	2.800000
2022-09-01 00:30:00	NaN	4.18	NaN
2022-09-01 00:32:00	1.09	NaN	353.000017
2022-09-01 01:00:00	NaN	4.00	NaN

df[['VHM0','VTZA']].plot(style='+')

Convert the wave height data to a mikeio dataset.

ds = mikeio.from_pandas(
    df[["VHM0"]].dropna(), items=mikeio.ItemInfo(mikeio.EUMType.Significant_wave_height)
)
ds

<mikeio.Dataset>
dims: (time:1439)
time: 2022-09-01 00:02:00 - 2022-09-30 23:31:59.999999744 (1439 non-equidistant records)
geometry: GeometryUndefined()
items:
  0:  VHM0 <Significant wave height> (meter)

Store the results in Dfs0 format.

ds.to_dfs("FINO1_VHM0.dfs0")

Read the file again to check…

ds = mikeio.read("FINO1_VHM0.dfs0")
ds

<mikeio.Dataset>
dims: (time:1439)
time: 2022-09-01 00:02:00 - 2022-09-30 23:32:00 (1439 non-equidistant records)
geometry: GeometryUndefined()
items:
  0:  VHM0 <Significant wave height> (meter)