STFC RAL methane retrievals from IASI on board MetOp-B, version 2.0

This Infrared Atmospheric Sounding Interferometer (IASI) methane dataset contains height-resolved and column-averaged volume mixing ratios of atmospheric methane (CH4) retrieved from the IASI instrument on the MetOp-B satellite. It also includes column-averaged water vapour (H2O), a scale factor for the HDO (water vapour isotopologue) volume mixing ratio profile, surface temperature, effective cloud fraction, effective cloud-top pressure and scale factors for two systematic residual spectra which are jointly retrieved from the spectral range 1232.25-1290.00 cm-1. This dataset was produced by Version 2.0 of the Rutherford Appleton Laboratory's (RAL's) IASI optimal estimation scheme to retrieve methane, which takes as input temperature and water vapour profiles and surface spectral emissivity pre-retrieved by RAL's Infrared and Microwave Scheme applied to IASI, MHS and AMSU-A on MetOp-B. The dataset additionally contains selected a priori values and uncertainties adopted in the optimal estimation scheme and retrieval output diagnostics such as the retrieval cost and the averaging kernels.



Development of the Version 2.0 scheme and its application to MetOp-A (2007-2017, http://dx.doi.org/10.5285/f717a8ea622f495397f4e76f777349d1) was funded by the National Centre for Earth Observation (NCEO) under the UK Natural Environment Research Council (NERC) with additional funding from EUMETSAT. Adaptation to MetOp-B and production of the IASI MetOp-B methane dataset 01/2018-03/2021 were funded by NCEO and ESA Contract No. 4000129987/20/I-DT Methane+.



Data were produced by the United Kingdom Research and Innovation (UKRI) Science and Technology Facilities Council (STFC) Remote Sensing Group (RSG) at the Rutherford Appleton Laboratory (RAL).

Simple

Date (Publication)
2022-01-18T18:05:28
Date (Creation)
2022-01-18T18:05:28
Citation identifier
https://catalogue.ceda.ac.uk/uuid/4bbcb1722f2842c1b0a5ebc19160a863
Citation identifier
NERC EDS Centre for Environmental Data Analysis / 4bbcb1722f2842c1b0a5ebc19160a863
Citation identifier
doi / 10.5285/4bbcb1722f2842c1b0a5ebc19160a863
Point of contact
Organisation name Individual name Electronic mail address Role

Unavailable

Knappett, Diane

Unavailable

 		Author

Unavailable

Siddans, Richard

Unavailable

 		Author

Unavailable

Ventress, Lucy

Unavailable

 		Author

Unavailable

Kerridge, Brian

Unavailable

 		Author

Unavailable

Latter, Barry

Unavailable

 		Author

NERC EDS Centre for Environmental Data Analysis

support@ceda.ac.uk

Custodian

NERC EDS Centre for Environmental Data Analysis

support@ceda.ac.uk

Distributor

Natural Environment Research Council (NERC)

unknown

 		Principal investigator

Unavailable

Aben, Ilse

Unavailable

 		Principal investigator

NERC EDS Centre for Environmental Data Analysis

support@ceda.ac.uk

pointofContact

Unavailable

Knappett, Diane

Unavailable

 		pointofContact

NERC EDS Centre for Environmental Data Analysis

support@ceda.ac.uk

Publisher
Maintenance and update frequency
Not planned
Update scope
Dataset
Keywords

  • methane

  • IASI

  • optimal estimation

  • retrieval

  • averaging kernels

  • assimilation

GEMET - INSPIRE themes, version 1.0

  • orthoimagery
Access constraints
Other restrictions
Other constraints
Access to these data is available to any registered CEDA user. Please Login or Register for a CEDA account to gain access.
Use constraints
Other restrictions
Other constraints
Under the following licence http://www.nationalarchives.gov.uk/doc/open-government-licence/version/3/, appropriate use of these data may fall under any use. This message is intended as guidance, always read the full licence. When using these data you must cite them correctly using the citation given on the CEDA Data Catalogue record.
Spatial representation type
Grid
Language
English
Topic category
  • Imagery base maps earth cover
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E
W
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Begin date
2018-01-01T00:00:00
End date
2021-03-31T23:59:59
Unique resource identifier
WGS 84
Distribution format
Name Version

Data are in NetCDF format
Distributor contact
Organisation name Individual name Electronic mail address Role

NERC EDS Centre for Environmental Data Analysis

support@ceda.ac.uk

Distributor
OnLine resource
Protocol Linkage Name
https://catalogue.ceda.ac.uk/uuid/4bbcb1722f2842c1b0a5ebc19160a863

CEDA Data Catalogue Page
OnLine resource
Protocol Linkage Name
http://data.ceda.ac.uk/neodc/iasi_ch4_ral/data/metop-b/l2/tir/v2.0/

DOWNLOAD
OnLine resource
Protocol Linkage Name
https://www.atmos-meas-tech.net/10/4135/2017/

Siddans, R., Knappett, D., Kerridge, B., Waterfall, A., Hurley, J., Latter, B., Boesch, H., and Parker, R.: Global height-resolved methane retrievals from the Infrared Atmospheric Sounding Interferometer (IASI) on MetOp, Atmos. Meas. Tech., 10, 4135–4164, https://doi.org/10.5194/amt-10-4135-2017, 2017.

OnLine resource
Protocol Linkage Name
https://doi.org/10.5281/zenodo.5873645

RAL IASI Methane Retrieval ATBD
OnLine resource
Protocol Linkage Name
https://doi.org/10.5281/zenodo.5873698

RAL IASI MetOp-B TIR Methane Dataset v2.0: Product User Guide
Hierarchy level
Dataset

Conformance result

Title

Commission Regulation (EU) No 1089/2010 of 23 November 2010 implementing Directive 2007/2/EC of the European Parliament and of the Council as regards interoperability of spatial data sets and services

Date (Publication)
2010-12-08
Statement

Data has been produced by the Rutherford Appleton Laboratory (RAL) Remote Sensing Group (RSG) at the United Kingdom Research and Innovation (UKRI) Science and Technology Facilities Council (STFC) and supplied to the Centre for Environmental Data Analysis for long term archiving.



Development of the Version 2.0 Infrared Atmospheric Sounding Interferometer (IASI) offline thermal infrared methane retrieval scheme and its application to MetOp-A (2007-2017, http://dx.doi.org/10.5285/f717a8ea622f495397f4e76f777349d1) were funded by the National Centre for Earth Observation (NCEO) under the UK Natural Environment Research Council (NERC) with additional funding from EUMETSAT. Adaptation to MetOp-B and production of the IASI MetOp-B methane dataset (01/2018-03/2021) were funded by NCEO and ESA Contract No. 4000129987/20/I-DT Methane+.

Metadata

File identifier
4bbcb1722f2842c1b0a5ebc19160a863 XML
Metadata language
English
Character set
UTF8
Hierarchy level
Dataset
Date stamp
2025-12-12T03:22:05
Metadata standard name
UK GEMINI
Metadata standard version

2.3
Metadata author
Organisation name Individual name Electronic mail address Role

NERC EDS Centre for Environmental Data Analysis

support@ceda.ac.uk

Point of contact
 
 

Overviews

Spatial extent

thumbnail

Keywords

GEMET - INSPIRE themes, version 1.0

orthoimagery


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