aa09603e91b44f3cb1573c9dd415e8a8 English 8-bit variable size UCS Transfer Format, based on ISO/IEC 10646 0508f3dd991144aa80346007a415fb07 dataset Centre for Environmental Data Analysis (CEDA) 01235446432 Rutherford Appleton Laboratory Harwell Oxon OX11 0QX United Kingdom support@ceda.ac.uk pointOfContact 2026-05-06T02:17:10 UK GEMINI 2.3 WGS 84 ESA Greenhouse Gases Climate Change Initiative (GHG_cci): Column-averaged CH4 from SCIAMACHY generated with the WFMD algorithm (CH4_SCI_WFMD), version 4.0 2018-03-19T21:10:04 publication 2018-03-19T21:10:04 creation https://catalogue.ceda.ac.uk/uuid/aa09603e91b44f3cb1573c9dd415e8a8 aa09603e91b44f3cb1573c9dd415e8a8 Centre for Environmental Data Analysis (CEDA) esacci.GHG.satellite-orbit-frequency.L2.CH4.SCIAMACHY.Envisat.WFMD.v4-0.r1.v20180702 alternative.identifier 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. ESA CCI GHG project team author unknown author Centre for Environmental Data Analysis (CEDA) custodian 01235446432 Rutherford Appleton Laboratory Harwell Oxon OX11 0QX United Kingdom support@ceda.ac.uk custodian Centre for Environmental Data Analysis (CEDA) distributor 01235446432 Rutherford Appleton Laboratory Harwell Oxon OX11 0QX United Kingdom support@ceda.ac.uk distributor Centre for Environmental Data Analysis (CEDA) point_of_contact 01235446432 Rutherford Appleton Laboratory Harwell Oxon OX11 0QX United Kingdom support@ceda.ac.uk pointofContact Schneising, O. Unavailable point_of_contact Unavailable pointofContact Centre for Environmental Data Analysis (CEDA) publisher 01235446432 Rutherford Appleton Laboratory Harwell Oxon OX11 0QX United Kingdom support@ceda.ac.uk publisher notPlanned dataset greenhouse gases SCIAMACHY column-averaged dry air mole fraction of CH4 SCIAMACHY SCanning Imaging Absorption spectroMeter for Atmospheric CHartographY column-averaged dry air mole fraction of CH4 greenhouse gases satellite orbit frequency University of Bremen Envisat Environmental Satellite Level 2 WFMD SCIAMACHY ESA GHG CCI CH4 WFMD orthoimagery theme GEMET - INSPIRE themes, version 1.0 2008-06-01 publication otherRestrictions Public data: access to these data is available to both registered and non-registered users. otherRestrictions 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. grid English imageryBaseMapsEarthCover -180.0 180.0 -90.0 90.0 2002-10-01T00:00:00 2011-12-31T23:59:59 Data are in NetCDF format Centre for Environmental Data Analysis (CEDA) Data Center Contact 01235446432 Rutherford Appleton Laboratory Harwell Oxon OX11 0QX United Kingdom support@ceda.ac.uk distributor https://catalogue.ceda.ac.uk/uuid/aa09603e91b44f3cb1573c9dd415e8a8 CEDA Data Catalogue Page Detail and access information for the resource information http://data.ceda.ac.uk/neodc/esacci/ghg/data/crdp_4/SCIAMACHY/CH4_SCI_WFMD/v4.0/ DOWNLOAD Download Data download 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 No further details. information http://www.iup.uni-bremen.de/sciamachy/NIR_NADIR_WFM_DOAS/products/ U Bremen, WFMD web page No further details. information http://www.esa-ghg-cci.org/sites/default/files/documents/public/documents/GHG-CCI_DATA.html GHG-CCI Data Products webpage No further details. information 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' No further details. information http://www.esa-ghg-cci.org/index.php?q=webfm_send/160 Product Specification Document Version 3 (PSDv3) No further details. information http://data.ceda.ac.uk/neodc/esacci/ghg/metadata/sample_images/ESACCI-GHG-L2-CH4-SCIAMACHY-WFMD-20100401-fv1.png Sample Image No further details. information http://www.esa-ghg-cci.org/index.php?q=webfm_send/347 Comprehensive Error Characterisation Report (CECR) - SCIAMACHY WFM-DOAS (WFMD) XCO2 and XCH4 No further details. information http://www.esa-ghg-cci.org/?q=webfm_send/352 Product Validation and Intercomparison Report (PVIRv4) No further details. information http://www.esa-ghg-cci.org/index.php?q=webfm_send/334 Algorithm Theoretical Basis Document (ATBD) - SCIAMACHY WFM-DOAS (WFMD) XCO2 and XCH4 No further details. information http://www.esa-ghg-cci.org/index.php?q=webfm_send/335 Product User Guide No further details. information https://climate.esa.int/projects/ghgs/ ESA CCI Greenhouse Gases project website No further details. information dataset 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 2010-12-08 Data were processed by the ESA CCI GHG project team and supplied to CEDA as part of the ESA CCI Open Data Portal Project