Dataset: DT merged all satellites European Seas Gridded SSALTO/DUACS Sea Surface Height L4 product and derived variables#

Dataset identifier: cmems_obs-sl_eur_phy-ssh_my_allsat-l4-duacs-0.125deg_P1D
Data store: cmems

How to open this dataset in AVL JupyterLab  

cmems_store = new_data_store('cmems')
ds = cmems_store.open_data('cmems_obs-sl_eur_phy-ssh_my_allsat-l4-duacs-0.125deg_P1D')

Bounding box map#

Bounding box map
Map tiles and data from OpenStreetMap, under the ODbL.

Basic information#

Parameter Value
Bounding box longitude (°) -30.125 to 42.125
Bounding box latitude (°) 19.875 to 66.125
Time range 1993-01-01 to 2022-06-23
Time period 1D

Click here for full dataset metadata.

Variable list#

Click on a variable name to jump to the variable’s full metadata.

Variable Long name Units
adt Absolute dynamic topography m
err_sla Formal mapping error m
err_ugosa Formal mapping error on zonal geostrophic velocity anomalies m/s
err_vgosa Formal mapping error on meridional geostrophic velocity anomalies m/s
flag_ice Ice Flag for a 15% criterion of ice concentration [none]
lat_bnds [none] degrees_north
lon_bnds [none] degrees_east
sla Sea level anomaly m
tpa_correction TOPEX-A instrumental drift correction derived from altimetry and tide gauges global comparisons (WCRP Sea Level Budget Group, 2018) m
ugos Absolute geostrophic velocity: zonal component m/s
ugosa Geostrophic velocity anomalies: zonal component m/s
vgos Absolute geostrophic velocity: meridian component m/s
vgosa Geostrophic velocity anomalies: meridian component m/s

Full variable metadata#

adt#

Field Value
comment The absolute dynamic topography is the sea surface height above geoid; the adt is obtained as follows: adt=sla+mdt where mdt is the mean dynamic topography; see the product user manual for details
grid_mapping crs
long_name Absolute dynamic topography
standard_name sea_surface_height_above_geoid
units m

crs#

Field Value
comment This is a container variable that describes the grid_mapping used by the data in this file. This variable does not contain any data; only information about the geographic coordinate system.
inverse_flattening 298.257
grid_mapping_name latitude_longitude
semi_major_axis 6378136.3
_CoordinateTransformType Projection
_CoordinateAxisTypes GeoX GeoY

err_sla#

Field Value
comment The formal mapping error represents a purely theoretical mapping error. It mainly traduces errors induced by the constellation sampling capability and consistency with the spatial/temporal scales considered, as described in Le Traon et al (1998) or Ducet et al (2000)
grid_mapping crs
long_name Formal mapping error
standard_name sea_surface_height_above_sea_level standard_error
units m

err_ugosa#

Field Value
comment The formal mapping error represents a purely theoretical mapping error. It mainly traduces errors induced by the constellation sampling capability and consistency with the spatial/temporal scales considered, as described in Le Traon et al (1998) or Ducet et al (2000)
grid_mapping crs
long_name Formal mapping error on zonal geostrophic velocity anomalies
standard_name surface_geostrophic_eastward_sea_water_velocity_assuming_sea_level_for_geoid standard_error
units m/s

err_vgosa#

Field Value
comment The formal mapping error represents a purely theoretical mapping error. It mainly traduces errors induced by the constellation sampling capability and consistency with the spatial/temporal scales considered, as described in Le Traon et al (1998) or Ducet et al (2000)
grid_mapping crs
long_name Formal mapping error on meridional geostrophic velocity anomalies
standard_name surface_geostrophic_northward_sea_water_velocity_assuming_sea_level_for_geoid standard_error
units m/s

flag_ice#

Field Value
comment Ice Flag based on CDR OSI SAF products until 2016 (OSI-450), Interim products from 2016 (OSI-430-b) (Lavergne et al., 2019). The flag corresponds to the 15% sea ice concentration.
flag_meanings data_on_sea data_on_ice
flag_values 0, 1
grid_mapping crs
long_name Ice Flag for a 15% criterion of ice concentration
standard_name status_flag

lat_bnds#

Field Value
comment latitude values at the north and south bounds of each pixel.
units degrees_north

lon_bnds#

Field Value
comment longitude values at the west and east bounds of each pixel.
units degrees_east

sla#

Field Value
ancillary_variables err_sla
comment The sea level anomaly is the sea surface height above mean sea surface; it is referenced to the [1993, 2012] period; see the product user manual for details
grid_mapping crs
long_name Sea level anomaly
standard_name sea_surface_height_above_sea_level
units m

tpa_correction#

Field Value
comment This variable can be added to the gridded SLA to correct for the observed instrumental drift during the lifetime of the TOPEX-A mission (the correction is null after this period). This is a global correction to be added a posteriori (and not before) on the global mean sea level estimate derived from the gridded sea level map. It can be applied at regional or local scale as a best estimate (better than no correction, since the regional variation of the instrumental drift is unknown). See product manual for more details.
long_name TOPEX-A instrumental drift correction derived from altimetry and tide gauges global comparisons (WCRP Sea Level Budget Group, 2018)
standard_name sea_surface_height_above_sea_level
units m

ugos#

Field Value
grid_mapping crs
long_name Absolute geostrophic velocity: zonal component
standard_name surface_geostrophic_eastward_sea_water_velocity
units m/s

ugosa#

Field Value
ancillary_variables err_ugosa
comment The geostrophic velocity anomalies are referenced to the [1993, 2012] period
grid_mapping crs
long_name Geostrophic velocity anomalies: zonal component
standard_name surface_geostrophic_eastward_sea_water_velocity_assuming_sea_level_for_geoid
units m/s

vgos#

Field Value
grid_mapping crs
long_name Absolute geostrophic velocity: meridian component
standard_name surface_geostrophic_northward_sea_water_velocity
units m/s

vgosa#

Field Value
ancillary_variables err_vgosa
comment The geostrophic velocity anomalies are referenced to the [1993, 2012] period
grid_mapping crs
long_name Geostrophic velocity anomalies: meridian component
standard_name surface_geostrophic_northward_sea_water_velocity_assuming_sea_level_for_geoid
units m/s

Full dataset metadata#

Field Value
Conventions CF-1.6
Metadata_Conventions Unidata Dataset Discovery v1.0
cdm_data_type Grid
comment Sea Surface Height measured by Altimetry and derived variables
contact servicedesk.cmems@mercator-ocean.eu
creator_email servicedesk.cmems@mercator-ocean.eu
creator_name CMEMS - Sea Level Thematic Assembly Center
creator_url http://marine.copernicus.eu
date_created 2023-01-10T18:35:32Z
date_issued 2023-01-10T18:35:32Z
date_modified 2023-01-10T18:35:32Z
geospatial_lat_max 66.0625
geospatial_lat_min 19.9375
geospatial_lat_resolution 0.125
geospatial_lat_units degrees_north
geospatial_lon_max 42.0625
geospatial_lon_min -30.0625
geospatial_lon_resolution 0.125
geospatial_lon_units degrees_east
geospatial_vertical_max 0.0
geospatial_vertical_min 0.0
geospatial_vertical_positive down
geospatial_vertical_resolution point
geospatial_vertical_units m
history 2023-01-10 18:35:33Z: Creation
institution CLS, CNES
keywords Oceans > Ocean Topography > Sea Surface Height
keywords_vocabulary NetCDF COARDS Climate and Forecast Standard Names
license http://marine.copernicus.eu/web/27-service-commitments-and-licence.php
platform Altika Drifting Phase, Cryosat-2 New Orbit, Haiyang-2B, Jason-3 Interleaved, Sentinel-3A, Sentinel-3B, Sentinel-6A
processing_level L4
product_version vDec2021
project COPERNICUS MARINE ENVIRONMENT MONITORING SERVICE (CMEMS)
references http://marine.copernicus.eu
software_version 7.1_DUACS_DT2021_baseline
source Altimetry measurements
ssalto_duacs_comment The reference mission used for the altimeter inter-calibration processing is Topex/Poseidon between 1993-01-01 and 2002-04-23, Jason-1 between 2002-04-24 and 2008-10-18, OSTM/Jason-2 between 2008-10-19 and 2016-06-25, Jason-3 between 2016-06-25 and 2022-02-09, and Sentinel-6A from 2022-02-10.
standard_name_vocabulary NetCDF Climate and Forecast (CF) Metadata Convention Standard Name Table v37
summary SSALTO/DUACS Delayed-Time Level-4 sea surface height and derived variables measured by multi-satellite altimetry observations over European Seas.
time_coverage_duration P1D
time_coverage_end 2022-06-23T12:00:00Z
time_coverage_resolution P1D
time_coverage_start 2022-06-22T12:00:00Z
title DT merged all satellites European Seas Gridded SSALTO/DUACS Sea Surface Height L4 product and derived variables
_CoordSysBuilder ucar.nc2.dataset.conv.CF1Convention