Dataset
ESA Precursors for Aerosols and Ozone Climate Change Initiative (Precursors_cci): IASI/Metop-A NH3 L3 product, version 4R
Abstract
This long-term dataset contains monthly Level 3 (L3) gridded ammonia (NH3) total column data derived from IASI (Infrared Atmospheric Sounding Interferometer) measurements onboard Metop-A (Meteorological operational satellite-A) data produced as part of the European Space Agency's (ESA) Climate Change Initiative (CCI) Precursors for aerosols and ozone project. The temporal range of this dataset is October 2007 to October 2021. Full documentation can be found at the project website: https://climate.esa.int/en/projects/precursors-for-aerosols-and-ozone/.
The version number is 4.0.1R. Data are available in NetCDF format.
This dataset forms part of the ESA Precursors Climate Change Initiative (Precursors_cci): Precursors IASI NH3 L3 data products v4R. doi:10.5285/463862326d574951bea52527f9df397d. https://dx.doi.org/10.5285/463862326d574951bea52527f9df397d
Details
| Previous Info: |
2026-02-26 This dataset forms part of the ESA Precursors Climate Change Initiative (Precursors_cci): Precursors IASI NH3 L3 data products … Show More 2026-02-26 This dataset forms part of the ESA Precursors Climate Change Initiative (Precursors_cci): Precursors IASI NH3 L3 data products v4R. doi:10.5285/463862326d574951bea52527f9df397d. https://dx.doi.org/10.5285/463862326d574951bea52527f9df397d Show Less |
|---|---|
| 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(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
|
Related Documents
Process overview
Computation Element: 1
| Title | Computation process of the gridded ammonia (NH3) monthly L3 data from IASI/Metop-A |
| Abstract | This long-term dataset has been created from the ANNI version 4 NH3 L2 data retrieved from IASI/Metop-A data. Detailed information on the L2 algorithm can be found in Clarisse et al. (2023). Detailed information on the L3 algorithm can be found in the Algorithm Theoretical Basis Document. |
| Input Description | None |
| Output Description | None |
| Software Reference | None |
| Output Description | None |
- units: mol m-2
- var_id: nh3_total_column_am
- long_name: L3 (AM) NH3 total column in mole per square meter
- units: mol m-2
- var_id: nh3_total_column_ampm
- long_name: L3 (AM+PM) NH3 total column in mole per square meter
- units: mol m-2
- var_id: nh3_total_column_pm
- long_name: L3 (PM) NH3 total column in mole per square meter
- units: day
- var_id: eff_date_am
- long_name: effective date (AM)
- units: day
- var_id: eff_date_ampm
- long_name: effective date (AM+PM)
- units: day
- var_id: eff_date_pm
- long_name: effective date (PM)
- units: 1
- var_id: eff_fract_day_am
- long_name: effective fractional day in local solar time (AM)
- units: 1
- var_id: eff_fract_day_pm
- long_name: effective fractional day in local solar time (PM)
- units: 1
- standard_name: number_of_observations
- var_id: number_of_observations_am
- long_name: number of observations used for calculating the L3 (AM)
- units: 1
- standard_name: number_of_observations
- var_id: number_of_observations_ampm
- long_name: number of observations used for calculating the L3 (AM+PM)
- units: 1
- standard_name: number_of_observations
- var_id: number_of_observations_pm
- long_name: number of observations used for calculating the L3 (PM)
- units: mol m-2
- var_id: nh3_total_column_random_uncertainty_am
- long_name: random total uncertainty on the NH3 total column (AM)
- units: mol m-2
- var_id: nh3_total_column_random_uncertainty_ampm
- long_name: random total uncertainty on the NH3 total column (AM+PM)
- units: mol m-2
- var_id: nh3_total_column_random_uncertainty_pm
- long_name: random total uncertainty on the NH3 total column (PM)
- units: m
- var_id: surface_altitude_am
- long_name: surface altitude (AM)
- units: m
- var_id: surface_altitude_ampm
- long_name: surface altitude (AM+PM)
- units: m
- var_id: surface_altitude_pm
- long_name: surface altitude (PM)
- units: Pa
- var_id: surface_air_pressure_am
- long_name: surface pressure (AM)
- units: Pa
- var_id: surface_air_pressure_ampm
- long_name: surface pressure (AM+PM)
- units: Pa
- var_id: surface_air_pressure_pm
- long_name: surface pressure (PM)
- units: mol m-2
- var_id: nh3_total_column_systematic_uncertainty_am
- long_name: systematic total uncertainty on the NH3 total column (AM)
- units: mol m-2
- var_id: nh3_total_column_systematic_uncertainty_pm
- long_name: systematic total uncertainty on the NH3 total column (PM)
- units: mol m-2
- var_id: nh3_total_column_systematic_uncertainty_ampm
- long_name: systematic total uncertainty on the total column (AM+PM)
Co-ordinate Variables
- units: degrees_north
- standard_name: latitude
- var_id: latitude
- units: degrees_east
- standard_name: longitude
- var_id: longitude
- standard_name: time
- var_id: time
- units: days
Temporal Range
2007-10-01T00:00:00
2021-10-31T23:59:59
Geographic Extent
90.0000° |
||
-180.0000° |
180.0000° |
|
-90.0000° |