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Dataset

 

ESA Sea State Climate Change Initiative (Sea_State_cci): Global remote sensing multi-mission along-track significant wave height from altimetry, L2P product, version 4

Update Frequency: Not Planned
Status: Pending
Online Status: ONLINE
Publication State: Preview
Publication Date:
THIS RECORD HAS NOT BEEN PUBLISHED YET - PREVIEW ONLY!
Abstract

The ESA Sea State Climate Change Initiative (CCI) project has produced global multi-sensor time-series of along-track satellite altimeter significant wave height data (referred to as Level 2P (L2P) data) with a particular focus for use in climate studies.

This dataset contains the Version 4 Remote Sensing Significant Wave Height product, which provides along-track data at approximately 6 km spatial resolution, separated per satellite and pass, including all measurements with flags, corrections and extra parameters from other sources. These are expert products with rich content and no data loss.

The altimeter data used in the Sea State CCI dataset v4 come from multiple satellite missions spanning from 1992 to 2023 ( ERS-1, ERS-2, Topex-Poseidon, Envisat, CryoSat-2, Jason-1, Jason-2, Jason-3, SARAL, Sentinel-3 A, Sentinel-3 B, Sentinel-6 A), therefore spanning over a larger time range than the previous version 3 (2002-2021). Many altimeters are bi-frequency (Ku-C or Ku-S) and only measurements in the Ku band were used, for consistency reasons, being available on each altimeter but SARAL (Ka band).

Citable as:  [ PROVISIONAL ] Piollé, J.-F.; Dodet, G.; Ardhuin, F.; Passaro, M. (9999): ESA Sea State Climate Change Initiative (Sea_State_cci): Global remote sensing multi-mission along-track significant wave height from altimetry, L2P product, version 4. NERC EDS Centre for Environmental Data Analysis, date of citation. https://catalogue.ceda.ac.uk/uuid/baeb32fd74cb49a1b67a6a4164ff0899
Cite this dataset

Abbreviation: Not defined
Keywords: CCI, Sea State, Significant Wave Height

Details

Previous Info:
No news update for this record
Previously used record identifiers:
No related previous identifiers.
Access rules:
Please contact the data centre for details on how to access these data.
Use of these data is covered by the following licence(s):
https://artefacts.ceda.ac.uk/licences/specific_licences/esacci_sea_state_terms_and_conditions.pdf
When using these data you must cite them correctly using the citation given on the CEDA Data Catalogue record.
Data lineage:

Data was produced by the ESA Sea State CCI team at Ifremer and was transferred to CEDA as part of the ESA CCI Open Data Portal project.
Data Quality:
The data were quality checked and compared to in situ reference data. For more details on the validation process, refer to the product user guide.
File Format:
Data are in NetCDF format

Related Documents

 ESA CCI Sea State project website
 Product User Guide

Process overview

This dataset was generated by a combination of instruments deployed on platforms and computations as detailed below.

Computation Element: 1

Title Derivation of ESA Sea State Climate Change Initiative (Sea_State_cci): Global remote sensing multi-mission along-track significant wave height from altimetery, version 4 datasets
Abstract For information on the derivation of the Sea_State_cci Global remote sensingmulti-mission along-track significant wave height from altimetery version 4 products please see the product user guide.
Input Description None
Output Description None
Software Reference None
Output Description

None
  • units: m s-1
  • standard_name: eastward_wind
  • long_name: 10 metre U wind component
  • var_id: era5_wind_eastward
  • standard_name: northward_wind
  • long_name: 10 metre V wind component
  • units: m -1
  • var_id: era5_wind_northward
  • units: K
  • long_name: 2 metre temperature
  • var_id: era5_2m_air_temperature
  • units: 1
  • var_id: ww3_emb
  • long_name: EM-bias
  • units: degrees
  • long_name: Mean direction of wind waves
  • var_id: era5_windwave_direction
  • standard_name: sea_surface_wind_wave_from_direction
  • units: s
  • long_name: Mean period of wind waves
  • standard_name: sea_surface_wind_wave_mean_period
  • var_id: era5_windwave_period
  • long_name: Mean wave direction
  • units: Degree true
  • standard_name: sea_surface_wave_mean_period
  • var_id: era5_mean_wave_direction
  • units: degrees
  • long_name: Mean wave direction of first swell partition
  • var_id: era5_swell_direction
  • standard_name: sea_surface_primary_swell_wave_from_direction
  • units: s
  • long_name: Mean wave period
  • standard_name: sea_surface_wave_mean_period_from_variance_spectral_density_second_frequency_moment
  • var_id: era5_mean_wave_period
  • units: s
  • long_name: Mean wave period based on first moment for swell
  • var_id: era5_swell_mean_period
  • standard_name: sea_surface_primary_swell_mean_period_from_variance_spectral_density_second_frequency_moment
  • units: s
  • long_name: Peak wave period
  • standard_name: sea_surface_wave_period_at_variance_spectral_density_maximum
  • var_id: era5_peak_wave_period
  • units: dB
  • var_id: sigma0_ka_rms
  • standard_name: surface_backwards_scattering_coefficient_of_radar_wave standard_error
  • long_name: RMS of the full resolution backscatter coefficient
  • units: m
  • var_id: swh_rms
  • long_name: RMS of the full resolution significant wave height with a 1 Hz compressed measurement
  • units: K
  • long_name: Sea surface temperature
  • var_id: era5_sea_surface_temperature
  • units: m
  • standard_name: sea_surface_wave_significant_height
  • long_name: Significant height of combined wind waves and swell
  • var_id: era5_swh
  • units: m
  • standard_name: sea_surface_wind_wave_significant_height
  • long_name: Significant height of wind waves
  • var_id: era5_windwave_swh
  • units: m
  • standard_name: sea_surface_primary_swell_wave_significant_height
  • long_name: Significant wave height of first swell partition
  • var_id: era5_swell_swh
  • units: Pa
  • standard_name: surface_air_pressure
  • long_name: Surface pressure
  • var_id: era5_surface_pressure
  • units: kg m-2
  • long_name: Total column cloud liquid water
  • var_id: era5_total_column_cloud_liquid_water
  • units: dB
  • standard_name: surface_backwards_scattering_coefficient_of_radar_wave
  • var_id: sigma0_ka
  • long_name: backscatter coefficient
  • var_id: sigma0_ka_rejection_flags
  • standard_name: surface_backwards_scattering_coefficient_of_radar_wave status_flag
  • long_name: consolidated instrument and sanity check flags raised when downgrading backscatter coefficient quality level
  • var_id: swh_rejection_flags
  • standard_name: sea_surface_wave_significant_height status_flag
  • long_name: consolidated instrument and sanity check flags raised when downgrading the swh quality level
  • units: m
  • var_id: distance_to_coast
  • units: m
  • var_id: swh_emd_imf1
  • long_name: first IMF attached to swh_adjusted
  • units: 1
  • standard_name: sea_ice_fraction
  • var_id: sea_ice_fraction
  • long_name: fraction of sea ice in water
  • var_id: ww3_wavenumber_peakdness
  • long_name: k-peakedness
  • units: m/rad
  • units: s
  • var_id: ww3_mean_wave_period_t0m1
  • standard_name: sea_surface_mean_wave_mean_period_from_variance_spectral_density_inverse_frequency_moment
  • long_name: mean period T01
  • units: s
  • var_id: ww3_mean_wave_period
  • standard_name: sea_surface_mean_wave_mean_period_from_variance_spectral_density_second_frequency_moment
  • long_name: mean period T02
  • units: 1
  • var_id: sigma0_ka_numval
  • standard_name: surface_backwards_scattering_coefficient_of_radar_wave number_of_observations
  • long_name: number of full resolution valid points used to compute backscatter coefficient
  • units: 1
  • var_id: swh_numval
  • standard_name: sea_surface_wave_significant_height number_of_observations
  • long_name: number of full resolution valid points used to compute the 1 Hz significant wave height value
  • units: m
  • var_id: bathymetry
  • long_name: ocean depth
  • standard_name: sea_floor_depth_below_mean_sea_level
  • standard_name: sea_surface_wave_significant_height status_flag
  • var_id: swh_quality_level
  • long_name: quality of significant wave height measurement
  • units: s
  • standard_name: sea_surface_wave_period_at_variance_spectral_density_maximum
  • var_id: ww3_peak_wave_period
  • units: m
  • standard_name: sea_surface_wave_significant_height
  • var_id: ww3_swh
  • long_name: significant height of wind and swell waves
  • units: m
  • var_id: swh
  • standard_name: sea_surface_wave_significant_height
  • long_name: significant wave height, as estimated by the altimeter retracker, without any cross-mission bias correction
  • units: m
  • standard_name: sea_surface_wave_significant_height
  • var_id: swh_adjusted
  • long_name: significant wave height, bias corrected
  • units: m
  • standard_name: sea_surface_wave_significant_height
  • var_id: swh_denoised
  • long_name: significant wave height, bias corrected and denoised
  • units: 1
  • var_id: ww3_wave_skewness
  • long_name: skewness
  • units: m
  • var_id: swh_emd_noise
  • long_name: standard deviation of the ensemble of noisy signals used to estimate swh_denoised
  • var_id: sigma0_ka_quality_level
  • standard_name: surface_backwards_scattering_coefficient_of_radar_wave status_flag
  • units: m
  • standard_name: sea_surface_wave_significant_height
  • var_id: swh_uncertainty
  • long_name: theoretical estimate of the uncertainty caused by speckle noise and sampling in 1-Hz averaged SWH values
  • units: m
  • long_name: uncertainty attached to swh_adjusted
  • var_id: swh_emd_uncertainty
  • standard_name: sea_surface_wave_significant_height standard_error
  • units: degree
  • var_id: ww3_mean_wave_direction
  • standard_name: sea_surface_wave_from_mean_direction
  • long_name: wave mean direction

Co-ordinate Variables

  • units: degrees_north
  • standard_name: latitude
  • long_name: latitude
  • var_id: lat
  • units: degrees_north
  • standard_name: latitude
  • var_id: lat
  • long_name: latitude : 1 Hz
  • units: degrees_north
  • standard_name: latitude
  • var_id: lat
  • long_name: latitude: 1 Hz
  • units: degrees_east
  • standard_name: longitude
  • long_name: longitude
  • var_id: lon
  • units: degrees_east
  • standard_name: longitude
  • var_id: lon
  • long_name: longitude : 1 Hz
  • units: degrees_east
  • standard_name: longitude
  • var_id: lon
  • long_name: longitude: 1 Hz
  • standard_name: time
  • var_id: time
  • units: seconds
  • long_name: time of measurement
Coverage
Temporal Range
Start time:
1991-08-03T00:00:00
End time:
2024-06-18T23:59:59
Geographic Extent

 
80.0000°
  
-180.0000°
  
180.0000°
 
-80.0000°
  
Related parties
Authors (4)
Publishers (1)