ESA Greenhouse Gases Climate Change Initiative (GHG_cci): Column-averaged CH4 from SCIAMACHY generated with the WFMD algorithm (CH4_SCI_WFMD), version 4.0

The CH4_SCI_WFMD dataset comprises level 2, column-averaged dry-air mole fractions (mixing ratios) of methane (XCH4). It has been produced using data acquired from the SCanning Imaging Absorption spectroMeter for Atmospheric CHartographY (SCIAMACHY) on board the European Space Agency's (ESA's) environmental research satellite ENVISAT, as part of the ESA's Greenhouse Gases Climate Change Initiative (GHG_cci) project. This version of the data is version 4.0, and forms part of the Climate Research Data Package 4.

The Weighting Function Modified DOAS (WFMD) algorithm is a least-squares method based on scaling pre-selected atmospheric vertical profiles. A second product is also available, which has been generated from the SCIAMACHY data using the IMAP algorithm.

The data product is stored per day in separate NetCDF-files (NetCDF-4 classic model). The product files contain the key products and other information relevant for the use of the data e.g. the averaging kernels. Note that the results since November 2005 are considered to be of reduced quality in comparison to the earlier results because the extended-wavelength part (1590-1770 nm) of SCIAMACHY's channel 6, covering the methane 2v3 absorption band used for the methane retrieval, is subject to irreversible displacement damage induced by high energy solar protons, which occurs from time to time at individual detector pixels. Therefore several affected detector pixels had to be excluded for the time period since November 2005.

For further information on the product, including details of the WFMD algorithm and the SCIAMACHY instrument, please see the associated product user guide (PUG) or the Algorithm Theoretical Basis Documents.

Date (Publication): 2018-03-19T21:10:04

Date (Creation): 2018-03-19T21:10:04

Citation identifier: https://catalogue.ceda.ac.uk/uuid/aa09603e91b44f3cb1573c9dd415e8a8

Citation identifier: Centre for Environmental Data Analysis (CEDA) / aa09603e91b44f3cb1573c9dd415e8a8

Citation identifier: alternative.identifier / esacci.GHG.satellite-orbit-frequency.L2.CH4.SCIAMACHY.Envisat.WFMD.v4-0.r1.v20180702

Point of contact

Organisation name	Individual name	Electronic mail address	Role
ESA CCI GHG project team		unknown	Author
Centre for Environmental Data Analysis (CEDA)		support@ceda.ac.uk	Custodian
Centre for Environmental Data Analysis (CEDA)		support@ceda.ac.uk	Distributor
Centre for Environmental Data Analysis (CEDA)		support@ceda.ac.uk	pointofContact
Unavailable	Schneising, O.	Unavailable	pointofContact
Centre for Environmental Data Analysis (CEDA)		support@ceda.ac.uk	Publisher

Maintenance and update frequency: Not planned

Update scope: Dataset

Keywords

GEMET - INSPIRE themes, version 1.0

orthoimagery

Access constraints: Other restrictions

Other constraints: Public data: access to these data is available to both registered and non-registered users.

Use constraints: Other restrictions

Other constraints: Under the following licence https://artefacts.ceda.ac.uk/licences/specific_licences/esacci_ghg_terms_and_conditions.pdf, 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

Begin date: 2002-10-01T00:00:00

End date: 2011-12-31T23:59:59

Unique resource identifier: WGS 84

Distribution format

Name	Version
Data are in NetCDF format

Distributor contact

Organisation name	Individual name	Electronic mail address	Role
Centre for Environmental Data Analysis (CEDA)		support@ceda.ac.uk	Distributor

OnLine resource

Protocol	Linkage	Name
	https://catalogue.ceda.ac.uk/uuid/aa09603e91b44f3cb1573c9dd415e8a8	CEDA Data Catalogue Page

OnLine resource

Protocol	Linkage	Name
	http://data.ceda.ac.uk/neodc/esacci/ghg/data/crdp_4/SCIAMACHY/CH4_SCI_WFMD/v4.0/	DOWNLOAD

OnLine resource

Protocol	Linkage	Name
	http://www.esa-ghg-cci.org/index.php?q=webfm_send/336	System Verification Report (SVR) CRDP#4 - SCIAMACHY WFM-DOAS (WFMD) XCO2 and XCH4

OnLine resource

Protocol	Linkage	Name
	http://www.iup.uni-bremen.de/sciamachy/NIR_NADIR_WFM_DOAS/products/	U Bremen, WFMD web page

OnLine resource

Protocol	Linkage	Name
	http://www.esa-ghg-cci.org/sites/default/files/documents/public/documents/GHG-CCI_DATA.html	GHG-CCI Data Products webpage

OnLine resource

Protocol	Linkage	Name
	http://www.atmos-chem-phys.org/11/2863/2011/acp-11-2863-2011.html	Schneising et al, 2011,'Long-term analysis of carbon dioxide and methane column-averaged mole fractions retrieved from SCIAMACHY'

OnLine resource

Protocol	Linkage	Name
	http://www.esa-ghg-cci.org/index.php?q=webfm_send/160	Product Specification Document Version 3 (PSDv3)

OnLine resource

Protocol	Linkage	Name
	http://data.ceda.ac.uk/neodc/esacci/ghg/metadata/sample_images/ESACCI-GHG-L2-CH4-SCIAMACHY-WFMD-20100401-fv1.png	Sample Image

OnLine resource

Protocol	Linkage	Name
	http://www.esa-ghg-cci.org/index.php?q=webfm_send/347	Comprehensive Error Characterisation Report (CECR) - SCIAMACHY WFM-DOAS (WFMD) XCO2 and XCH4

OnLine resource

Protocol	Linkage	Name
	http://www.esa-ghg-cci.org/?q=webfm_send/352	Product Validation and Intercomparison Report (PVIRv4)

OnLine resource

Protocol	Linkage	Name
	http://www.esa-ghg-cci.org/index.php?q=webfm_send/334	Algorithm Theoretical Basis Document (ATBD) - SCIAMACHY WFM-DOAS (WFMD) XCO2 and XCH4

OnLine resource

Protocol	Linkage	Name
	http://www.esa-ghg-cci.org/index.php?q=webfm_send/335	Product User Guide

OnLine resource

Protocol	Linkage	Name
	https://climate.esa.int/projects/ghgs/	ESA CCI Greenhouse Gases project website

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

Metadata

File identifier: aa09603e91b44f3cb1573c9dd415e8a8 XML

Metadata language: English

Character set: UTF8

Parent identifier: ESA Greenhouse Gases Climate Change Initiative (GHG_cci) dataset collection
0508f3dd991144aa80346007a415fb07

Hierarchy level: Dataset

Date stamp: 2026-03-11T03:17:31

Metadata standard name: UK GEMINI

Metadata standard version: 2.3

Metadata author

Organisation name	Individual name	Electronic mail address	Role
Centre for Environmental Data Analysis (CEDA)		support@ceda.ac.uk	Point of contact

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