Dataset
ESA Precursors for Aerosols and Ozone Climate Change Initiative (Precursors_cci): monthly L3 HCHO from GOME, version 2.0
Abstract
The Formaldehyde(HCHO) Climate Data Record (CDR) product is a Level 3 HCHO product developed by using satellite data from the GOME instrument (on ERS-2) as part of the ESA Climate Change Initiative (CCI) Precursors for Aerosols and Ozone project.
This dataset provides gridded HCHO tropospherical column densities of monthly 1°x 1° resolution grids from July 1995 to June 2003.
The L3 product is based on the Level 2 HCHO product created for the Precursors_cci project.
Compared to the qa4ecv GOME product, the air mass factors have been reprocessed using an update albedo climatology, and the CAMS Reanalysis Model for the a priori vertical profiles. The background correction and the quality values have also been updated.
In addition to the main product results, such as HCHO slant column, vertical column and air mass factor, the Level 3 data files contain several additional parameters and diagnostic information such as uncertainties, a priori profiles and averaging kernels.
The version number is 2.0. Data are available in NetCDF format. https://doi.org/10.18758/saabns5o
The European Space Agency (ESA) Precursors for Aerosol and Ozone Climate Change Initiative (Precursors CCI) project is part of ESA's Climate Change Initiative (CCI) to produce long term datasets of Essential Climate Variables derived from global satellite data (https://climate.esa.int/en/projects/precursors-for-aerosols-and-ozone/).
Details
| Previous Info: |
No news update for this record
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| Previously used record identifiers: |
No related previous identifiers.
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| 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(s): https://artefacts.ceda.ac.uk/licences/specific_licences/esacci_precursors_for_aerosols_and_ozone_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 produced by the project team and supplied for archiving at the Centre for Environmental Data Analysis (CEDA). |
| File Format: |
netcdf
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Process overview
Instrument/Platform pairings
| GOME | Deployed on: European Remote Sensing satellite 2 - ERS-2 |
Computation Element: 1
| Title | Computation for ESA Precursors for Aerosols and Ozone Climate Change Initiative (Precursors_cci): monthly L3 HCHO from GOME, version 2.0 |
| Abstract | This dataset provides gridded HCHO tropospherical column densities of monthly 1°x 1° resolution grids from July 1995 to June 2003. The L3 product is based on the Level 2 HCHO product created for the Precursors_cci project. Compared to the qa4ecv GOME product, the air mass factors have been reprocessed using an update albedo climatology, and the CAMS Reanalysis Model for the a priori vertical profiles. The background correction and the quality values have also been updated. See product documentation for more details. |
| Input Description | None |
| Output Description | None |
| Software Reference | None |
| Output Description | None |
- units: 1
- var_id: qa_L3
- long_name: HCHO QA L3
- units: molec/cm^2
- var_id: HCHO_slant_column_number_density
- long_name: HCHO SCD
- units: molec/cm^2
- var_id: HCHO_slant_column_number_density_uncertainty
- long_name: HCHO SCDE
- standard_name: troposphere_mole_content_of_formaldehyde
- units: molec/cm^2
- var_id: tropospheric_HCHO_column_number_density
- long_name: HCHO VCD
- units: molec/cm^2
- var_id: tropospheric_HCHO_column_number_density_apriori
- long_name: HCHO VCD CTM
- units: molec/cm^2
- var_id: tropospheric_HCHO_column_number_density_std
- long_name: HCHO VCD STD
- units: molec/cm^2
- var_id: tropospheric_HCHO_column_number_density_clear
- long_name: HCHO VCD clear
- units: molec/cm^2
- var_id: tropospheric_HCHO_column_number_density_clear_OS
- long_name: HCHO VCD clear OS
- units: molec/cm^2
- var_id: tropospheric_HCHO_column_number_density_clear_std
- long_name: HCHO VCD clear STD
- units: 1
- var_id: tropospheric_HCHO_column_number_density_count
- long_name: HCHO VCD count
- units: 1
- var_id: tropospheric_HCHO_column_number_density_weight
- long_name: HCHO VCD weight
- units: molec/cm^2
- var_id: tropospheric_HCHO_column_number_density_background_correction
- long_name: HCHO VCD0
- units: molec/cm^2
- var_id: tropospheric_HCHO_column_number_density_uncertainty_random
- long_name: HCHO VCDER
- units: molec/cm^2
- var_id: tropospheric_HCHO_column_number_density_uncertainty_systematic
- long_name: HCHO VCDES
- units: molec/cm^2
- var_id: tropospheric_HCHO_column_number_density_uncertainty_systematic_kernel
- long_name: HCHO VCDESK
- units: ppv
- var_id: HCHO_volume_mixing_ratio_dry_air_apriori
- long_name: HCHO a priori profile
- units: molec/cm^2
- var_id: HCHO_slant_column_number_density_corrected
- long_name: HCHO bc-corrected SCD
- units: 1
- var_id: HCHO_averaging_kernel
- long_name: HCHO column averaging kernel
- units: 1
- var_id: HCHO_averaging_kernel_clear
- long_name: HCHO column averaging kernel, no cloud correction
- units: 1
- var_id: tropospheric_HCHO_column_number_density_amf
- long_name: HCHO tropospheric AMF (340nm)
- units: 1
- var_id: tropospheric_HCHO_column_number_density_amf_clear
- long_name: HCHO tropospheric clear AMF (340nm)
- units: 1
- var_id: count
- long_name: Harp count
- units: 1
- var_id: weight
- long_name: Harp weight
- units: 1
- var_id: HCHO_slant_column_number_density_rms
- long_name: RMS of the DOAS fits
- units: degree
- var_id: solar_zenith_angle
- standard_name: solar_zenith_angle
- long_name: SZA
- units: degree
- standard_name: sensor_zenith_angle
- var_id: sensor_zenith_angle
- long_name: VZA
- units: 1
- var_id: cloud_fraction
- long_name: cloud fraction
- units: hPa
- var_id: cloud_pressure
- long_name: cloud pressure
- units: hPa
- var_id: ctm_sigma_a
- long_name: ctm sigma-values a
- units: 1
- var_id: ctm_sigma_b
- long_name: ctm sigma-values b
- units: days
- var_id: eff_date
- long_name: effective date
- units: 1
- var_id: eff_fract_day
- long_name: effective fractional day in local solar time
- var_id: latitude_bounds
- long_name: grid latitude bounds
- var_id: longitude_bounds
- long_name: grid longitude bounds
- units: 1
- var_id: intensity_weighted_cloud_fraction
- long_name: intensity-weighted cloud radiance fraction (340 nm)
- units: 1
- long_name: land sea mask
- var_id: land_water_mask
- units: 1
- standard_name: atmosphere_hybrid_sigma_pressure_coordinate
- var_id: layer
- long_name: layer dimension index
- units: 1
- var_id: surface_albedo
- long_name: surface LER (340nm)
- units: hPa
- long_name: surface pressure
- var_id: surface_pressure
Co-ordinate Variables
- units: degree_north
- standard_name: latitude
- var_id: latitude
- units: degree_east
- standard_name: longitude
- var_id: longitude
- standard_name: time
- var_id: time
- units: days
- long_name: number of days since 1995-01-01
Temporal Range
1995-07-01T00:00:00
2003-06-30T23:59:59
Geographic Extent
90.0000° |
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-180.0000° |
180.0000° |
|
-90.0000° |