ESA Greenhouse Gases Climate Change Initiative (GHG_cci): Column-averaged CH4 Merged Product generated with the EMMA algorithm (CH4_EMMA), version 1.2

The CH4_EMMA dataset is comprised of level 2, column-averaged dry-air mole fractions (mixing ratios) for methane (XCH4). It has been produced using the ensemble median algorithm EMMA to several different versions of the Japanes Greenhouse gases Observing Satellite (GOSAT) XCH4 data, as part of the ESA Greenhouse Gases Climate Change Initiative (GHG_cci) project. This version of the product is v1.2, and forms part of the Climate Research Data Package 4.

The ensemble median algorithm EMMA has been applied to level 2 data of several different retrieval products from the Japanese Greenhouse gases Observing Satellite (GOSAT) This is therefore a merged GOSAT XCH4 Level 2 product, which is primarily used as a comparison tool to assess the level of agreement / disagreement of the various input products (for model-independent global comparison, i.e. for comparisons not restricted to TCCON validation sites and independent of global model data).

For further information on the product and the EMMA algorithm please see the EMMA website, the GHG-CCI Data Products webpage or the Product Validation and Intercomparison Report (PVIR).

Date (Publication): 2018-03-19T21:05:17

Date (Creation): 2018-03-19T21:05:17

Citation identifier: https://catalogue.ceda.ac.uk/uuid/9ed2813d2eda4d958e92ab3ce1ab1fe6

Citation identifier: Centre for Environmental Data Analysis (CEDA) / 9ed2813d2eda4d958e92ab3ce1ab1fe6

Citation identifier: alternative.identifier / esacci.GHG.satellite-orbit-frequency.L2.CH4.TANSO-FTS.GOSAT.EMMA.ch4_v1-2.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	Reuter, M.	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: 2009-06-01T00:00:00

End date: 2014-05-30T22:59:59

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/9ed2813d2eda4d958e92ab3ce1ab1fe6	CEDA Data Catalogue Page

OnLine resource

Protocol	Linkage	Name
	http://data.ceda.ac.uk/neodc/esacci/ghg/data/crdp_4/EMMA/CH4/v1.2/	DOWNLOAD

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://www.atmos-chem-phys.net/13/1771/2013/acp-13-1771-2013.html	Reuter et al, 2013,'A joint effort to deliver satellite retrieved atmospheric CO2 concentrations for surface flux inversions: the ensemble median algorithm EMMA'

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.iup.uni-bremen.de/~mreuter/emma_ch4.php	EMMA CH4 website

OnLine resource

Protocol	Linkage	Name
	http://www.esa-ghg-cci.org/?q=webfm_send/352	Product Validation and Intercomparison Report (PVIRv5)

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: 9ed2813d2eda4d958e92ab3ce1ab1fe6 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: 2026-02-16T03:14:42

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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