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Dataset

 

ESA Greenhouse Gases Climate Change Initiative (GHG_cci): Column-averaged methane from Sentinel-5P, generated with the WFM-DOAS algorithm, version 1.2

Status: Completed
Online Status: ONLINE
Publication State: Citable
Publication Date: 2020-03-31
DOI Publication Date: 2020-04-01
Download Stats: last 12 months

This dataset has been superseded. See Latest Version here
Abstract

This product is the column-average dry-air mole fraction of atmospheric methane, denoted XCH4. It has been retrieved from radiance measurements from the TROPOspheric Monitoring Instrument (TROPOMI) on the Sentinel-5 Precursor satellite in the 2.3 µm spectral range of the solar spectral range, using the Weighting Function Modified Differential Optical Absorption Spectroscopy (WFM-DOAS or WFMD) retrieval algorithm. This dataset is also referred to as CH4_S5P_WFMD.

The WFMD algorithm is based on iteratively fitting a simulated radiance spectrum to the measured spectrum using a least-squares method. The algorithm is very fast as it is based on a radiative transfer model based look-up table scheme. The product is limited to cloud-free scenes on the Earth's day side.

This data was produced as part of the European Space Agency's (ESA) Greenhouse Gases (GHG) Climate Change Initiative (CCI) project.

Citable as:  Schneising, O.; Buchwitz, M.; Reuter, M.; Bovensmann, H.; Burrows, J.P. (2020): ESA Greenhouse Gases Climate Change Initiative (GHG_cci): Column-averaged methane from Sentinel-5P, generated with the WFM-DOAS algorithm, version 1.2. Centre for Environmental Data Analysis, 01 April 2020. doi:10.5285/3534bbf43fa14e40bc61944eaf664511. http://dx.doi.org/10.5285/3534bbf43fa14e40bc61944eaf664511
Abbreviation: Not defined
Keywords: ESA, CCI, satellite, Sentinel-5 Precursor, TROPOMI, atmosphere, methane, carbon monoxide

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_ghg_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 were processed by the ESA CCI GHG project team and supplied to CEDA as part of the ESA CCI Open Data Portal Project.

Data Quality:
Data are as given by the data provider, no quality control has been performed by the Centre for Environmental Data Analysis (CEDA)
File Format:
Data are netCDF formatted.

Process overview

  • units: 1e-9
  • long_name: 1-sigma uncertainty of the retrieved column-averaged dry air mole fraction of atmospheric carbon monoxide
  • var_id: xco_uncertainty
  • names: 1-sigma uncertainty of the retrieved column-averaged dry air mole fraction of atmospheric carbon monoxide
  • units: 1e-9
  • var_id: xch4_uncertainty
  • long_name: 1-sigma uncertainty of the retrieved column-averaged dry air mole fraction of atmospheric methane
  • names: 1-sigma uncertainty of the retrieved column-averaged dry air mole fraction of atmospheric methane
  • units: g cm-2
  • long_name: 1-sigma uncertainty of the retrieved vertical column of atmospheric water vapour
  • var_id: h2o_column_uncertainty
  • names: 1-sigma uncertainty of the retrieved vertical column of atmospheric water vapour
  • units: 1e-9
  • long_name: a priori dry air mole fraction profile of atmospheric carbon monoxide
  • var_id: co_profile_apriori
  • names: a priori dry air mole fraction profile of atmospheric carbon monoxide
  • units: 1e-9
  • var_id: ch4_profile_apriori
  • long_name: a priori dry air mole fraction profile of atmospheric methane
  • names: a priori dry air mole fraction profile of atmospheric methane
  • units: 1
  • long_name: across track dimension index
  • var_id: ground_pixel
  • names: across track dimension index
  • units: 1
  • long_name: along track dimension index
  • var_id: scanline
  • names: along track dimension index
  • units: m
  • standard_name: altitude
  • var_id: altitude
  • long_name: altitude
  • names: altitude
  • units: 1
  • long_name: apparent surface albedo
  • var_id: apparent_albedo
  • names: apparent surface albedo
  • units: degree
  • long_name: azimuth difference
  • var_id: azimuth_difference
  • names: azimuth difference
  • units: 1
  • long_name: cloud parameter from strong water vapour absorption
  • var_id: cloud_parameter
  • names: cloud parameter from strong water vapour absorption
  • units: 1e-9
  • long_name: column-averaged dry air mole fraction of atmospheric carbon monoxide
  • var_id: xco
  • names: column-averaged dry air mole fraction of atmospheric carbon monoxide
  • units: 1e-9
  • var_id: xch4
  • long_name: column-averaged dry air mole fraction of atmospheric methane
  • standard_name: dry_atmosphere_mole_fraction_of_methane
  • names: column-averaged dry air mole fraction of atmospheric methane, dry_atmosphere_mole_fraction_of_methane
  • units: 1e-2
  • long_name: land fraction
  • var_id: land_fraction
  • names: land fraction
  • units: degree_north
  • var_id: latitude_corners
  • long_name: latitude_corners
  • names: latitude_corners
  • units: degree_east
  • var_id: longitude_corners
  • long_name: longitude_corners
  • names: longitude_corners
  • units: 1
  • long_name: orbit number
  • var_id: orbit_number
  • names: orbit number
  • units: hPa
  • long_name: pressure levels
  • var_id: pressure_levels
  • names: pressure levels
  • units: 1
  • long_name: pressure weight
  • var_id: pressure_weight
  • names: pressure weight
  • long_name: quality flag
  • var_id: quality_flag
  • names: quality flag
  • units: degree
  • standard_name: sensor_zenith_angle
  • var_id: sensor_zenith_angle
  • long_name: sensor_zenith_angle
  • names: sensor_zenith_angle, sensor zenith angle
  • units: degree
  • var_id: solar_zenith_angle
  • standard_name: solar_zenith_angle
  • long_name: solar_zenith_angle
  • names: solar zenith angle, solar_zenith_angle
  • var_id: h2o_column
  • units: g cm-2
  • long_name: vertical column of water vapour
  • names: vertical column of water vapour
  • units: 1
  • var_id: xch4_averaging_kernel
  • long_name: xch4 averaging kernel
  • names: xch4 averaging kernel
  • units: 1
  • long_name: xco averaging kernel
  • var_id: xco_averaging_kernel
  • names: xco averaging kernel

Co-ordinate Variables

  • units: degree_north
  • standard_name: latitude
  • var_id: latitude
  • long_name: latitude
  • names: latitude
  • units: degree_east
  • standard_name: longitude
  • var_id: longitude
  • long_name: longitude
  • names: longitude
  • long_name: time
  • standard_name: time
  • var_id: time
  • names: time
Coverage
Temporal Range
Start time:
2017-11-10T00:00:00
End time:
2018-12-31T23:59:59
Geographic Extent

 
90.0000°
 
-180.0000°
 
180.0000°
 
-90.0000°