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Dataset

 
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ESA Sea State Climate Change Initiative (Sea_State_cci): Global remote sensing multi-mission along-track significant wave height, L2P product, version 1.1

Update Frequency: Not Planned
Status: Completed
Online Status: ONLINE
Publication State: Citable
Publication Date: 2020-01-30
DOI Publication Date: 2020-01-30
Download Stats: last 12 months

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 1.1 Remote Sensing Significant Wave Height product, along-track 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.

This first version of the Sea State CCI products is inherited from the GlobWave project building on experience and existing outputs. It extends and improves the GlobWave products which were a post-processing over existing L2 altimeter agency products with additional filtering, corrections and variables. A major improvement consists in a new denoised sea surface height variable using Empirical Mode Decomposition.

The altimeter data used in the Sea State CCI dataset v1.1 come from multiple satellite missions spanning from 1991 to 2018 (ERS-1, ERS-2, Topex, Envisat, GFO, CryoSat-2, Jason-1, Jason-2, Jason-3, SARAL). 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:  Piollé, J.-F.; Dodet, G.; Quilfen, Y. (2020): ESA Sea State Climate Change Initiative (Sea_State_cci): Global remote sensing multi-mission along-track significant wave height, L2P product, version 1.1. Centre for Environmental Data Analysis, 30 January 2020. doi:10.5285/f91cd3ee7b6243d5b7d41b9beaf397e1. http://dx.doi.org/10.5285/f91cd3ee7b6243d5b7d41b9beaf397e1
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:
Public data: access to these data is available to both registered and non-registered users.
Use of these data is covered by the following licence: 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

Process overview

  • var_id: wind_speed_model_u
  • long_name: 10 metre U wind component
  • units: m s-1
  • standard_name: eastward_wind
  • names: eastward_wind, 10 metre U wind component
  • standard_name: northward_wind
  • long_name: 10 metre V wind component
  • units: m s-1
  • var_id: wind_speed_model_v
  • names: northward_wind, 10 metre V wind component
  • units: K
  • var_id: surface_air_temperature
  • standard_name: air_temperature
  • long_name: 2 metre temperature
  • names: air_temperature, 2 metre temperature
  • units: m
  • long_name: Corrected sea surface height above the TOPEX-Poseidon reference ellipso�d
  • var_id: corssh
  • names: Corrected sea surface height above the TOPEX-Poseidon reference ellipso�d
  • standard_name: surface_backwards_scattering_coefficient_of_radar_wave
  • long_name: Ku band adjusted backscatter coefficient
  • units: dB
  • var_id: sigma0_adjusted
  • names: Ku band adjusted backscatter coefficient, surface_backwards_scattering_coefficient_of_radar_wave
  • var_id: swh_adjusted
  • standard_name: sea_surface_wave_significant_height
  • long_name: Ku band adjusted significant wave height
  • units: m
  • names: Ku band adjusted significant wave height, sea_surface_wave_significant_height
  • standard_name: surface_backwards_scattering_coefficient_of_radar_wave
  • units: dB
  • long_name: Ku band backscatter coefficient
  • var_id: sigma0
  • names: surface_backwards_scattering_coefficient_of_radar_wave, Ku band backscatter coefficient
  • var_id: swh_denoised
  • long_name: Ku band denoised significant wave height
  • standard_name: sea_surface_wave_significant_height
  • units: m
  • names: sea_surface_wave_significant_height, Ku band denoised significant wave height
  • long_name: Ku band significant wave height
  • var_id: swh
  • standard_name: sea_surface_wave_significant_height
  • units: m
  • names: sea_surface_wave_significant_height, Ku band significant wave height
  • long_name: Mean sea level pressure
  • standard_name: air_pressure_at_sea_level
  • units: Pa
  • var_id: surface_air_pressure
  • names: air_pressure_at_sea_level, Mean sea level pressure
  • units: m
  • long_name: Mean sea surface height
  • var_id: mean_sea_surface
  • names: Mean sea surface height
  • units: m
  • long_name: Non parametric sea state bias correction
  • var_id: sea_state_bias
  • names: Non parametric sea state bias correction
  • units: m
  • var_id: sea_state_bias
  • long_name: Non parametric sea state bias correction for Topex, BM4 formula for Poseidon
  • names: Non parametric sea state bias correction for Topex, BM4 formula for Poseidon
  • units: dB
  • long_name: RMS of the Ku band backscatter coefficient
  • var_id: sigma0_rms
  • names: RMS of the Ku band backscatter coefficient
  • var_id: swh_rms
  • long_name: RMS of the Ku band significant wave height (from 20 Hz measurements)
  • units: m
  • names: RMS of the Ku band significant wave height (from 20 Hz measurements)
  • units: m
  • var_id: swh_uncertainty
  • long_name: best estimate of significant wave height standard error
  • names: best estimate of significant wave height standard error
  • var_id: swh_rejection_flags
  • long_name: consolidated instrument and ice flags
  • names: consolidated instrument and ice flags
  • var_id: distance_to_coast
  • long_name: distance to nearest coast
  • units: m
  • names: distance to nearest coast
  • var_id: swh_noise
  • long_name: noise associated to Ku band significant wave height
  • names: noise associated to Ku band significant wave height
  • var_id: swh_num_valid
  • long_name: number of 20 Hz valid points used to compute Ku band significant wave height
  • units: 1
  • names: number of 20 Hz valid points used to compute Ku band significant wave height
  • standard_name: sea_floor_depth_below_mean_sea_level
  • long_name: ocean depth
  • var_id: bathymetry
  • units: m
  • names: ocean depth, sea_floor_depth_below_mean_sea_level
  • var_id: swh_quality
  • long_name: quality of Ku band significant wave height measurement
  • names: quality of Ku band significant wave height measurement
  • units: kg m-2
  • standard_name: atmosphere_cloud_liquid_water_content
  • var_id: total_column_liquid_water_content_rad
  • long_name: radiometer liquid water content
  • names: atmosphere_cloud_liquid_water_content, radiometer liquid water content
  • long_name: sea ice fraction
  • standard_name: sea_ice_fraction
  • var_id: sea_ice_fraction
  • units: 1
  • names: sea_ice_fraction, sea ice fraction
  • standard_name: wind_speed
  • var_id: wind_speed_alt
  • long_name: wind speed from Ku band altimeter, as in GDR
  • units: m s-1
  • names: wind_speed, wind speed from Ku band altimeter, as in GDR

Co-ordinate Variables

  • standard_name: latitude
  • var_id: lat
  • long_name: latitude
  • units: degrees_north
  • names: latitude
  • var_id: lon
  • units: degrees_east
  • standard_name: longitude
  • long_name: longitude
  • names: longitude
  • long_name: time
  • standard_name: time
  • var_id: time
  • names: time
Coverage
Temporal Range
Start time:
1991-07-31T23:00:00
End time:
2018-12-31T23:59:59
Geographic Extent

 
80.0000°
 
-180.0000°
 
180.0000°
 
-80.0000°