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

Identifier: https://catalogue.ceda.ac.uk/uuid/aa09603e91b44f3cb1573c9dd415e8a8

Identifier: Centre for Environmental Data Analysis (CEDA) / aa09603e91b44f3cb1573c9dd415e8a8

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

Author

ESA CCI GHG project team - author

Custodian

Centre for Environmental Data Analysis (CEDA) - custodian

Rutherford Appleton Laboratory , Harwell , Oxon , OX11 0QX , United Kingdom

01235446432

Distributor

Centre for Environmental Data Analysis (CEDA) - distributor

Rutherford Appleton Laboratory , Harwell , Oxon , OX11 0QX , United Kingdom

01235446432

pointofContact

Centre for Environmental Data Analysis (CEDA) - point_of_contact

Rutherford Appleton Laboratory , Harwell , Oxon , OX11 0QX , United Kingdom

01235446432

pointofContact

Unavailable - Schneising, O. ( point_of_contact )

Publisher

Centre for Environmental Data Analysis (CEDA) - publisher

Rutherford Appleton Laboratory , Harwell , Oxon , OX11 0QX , United Kingdom

01235446432

Maintenance and update frequency: notPlanned Not planned

Update scope: dataset Dataset

Keywords

GEMET - INSPIRE themes, version 1.0

orthoimagery

Access constraints: otherRestrictions Other restrictions

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

Use constraints: otherRestrictions 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 Grid

Metadata language: EnglishEnglish

Topic category

Imagery base maps earth cover

N

S

E

W

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

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

Unique resource identifier: WGS 84

Distribution format

Data are in NetCDF format ()

Distributor

Centre for Environmental Data Analysis (CEDA) - Data Center Contact

Rutherford Appleton Laboratory , Harwell , Oxon , OX11 0QX , United Kingdom

01235446432

OnLine resource: CEDA Data Catalogue Page
Detail and access information for the resource

OnLine resource: DOWNLOAD
Download Data

OnLine resource: System Verification Report (SVR) CRDP#4 - SCIAMACHY WFM-DOAS (WFMD) XCO2 and XCH4
No further details.

OnLine resource: U Bremen, WFMD web page
No further details.

OnLine resource: GHG-CCI Data Products webpage
No further details.

OnLine resource: Schneising et al, 2011,'Long-term analysis of carbon dioxide and methane column-averaged mole fractions retrieved from SCIAMACHY'
No further details.

OnLine resource: Product Specification Document Version 3 (PSDv3)
No further details.

OnLine resource: Sample Image
No further details.

OnLine resource: Comprehensive Error Characterisation Report (CECR) - SCIAMACHY WFM-DOAS (WFMD) XCO2 and XCH4
No further details.

OnLine resource: Product Validation and Intercomparison Report (PVIRv4)
No further details.

OnLine resource: Algorithm Theoretical Basis Document (ATBD) - SCIAMACHY WFM-DOAS (WFMD) XCO2 and XCH4
No further details.

OnLine resource: Product User Guide
No further details.

OnLine resource: ESA CCI Greenhouse Gases project website
No further details.

Hierarchy level: dataset Dataset

Conformance result

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

File identifier: aa09603e91b44f3cb1573c9dd415e8a8 XML

Metadata language: EnglishEnglish

Character set: 8-bit variable size UCS Transfer Format, based on ISO/IEC 10646 UTF8

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

Hierarchy level: dataset Dataset

Date stamp: 2025-11-15T03:15:46

Metadata standard name: UK GEMINI

Metadata standard version: 2.3

Point of contact

Centre for Environmental Data Analysis (CEDA)

Rutherford Appleton Laboratory , Harwell , Oxon , OX11 0QX , United Kingdom

01235446432

Overviews

Spatial extent

N

S

E

W

Provided by

Access to the portal

Read here the full details and access to the data.

Associated resources

Not available