{ "accessUrl": "https://data.icos-cp.eu/objects/fjTN8Jk3lxuvmyej8d23Ad-V", "coverageGeo": { "geometry": { "coordinates": [[[-180.0, -90.0], [-180.0, 90.0], [180.0, 90.0], [180.0, -90.0], [-180.0, -90.0]]], "type": "Polygon" }, "properties": { "label": "Global lat/lon box" }, "type": "Feature" }, "doi": "10.18160/V1Y4-NTK0", "fileName": "hoc_ch4_ts_mpi-bgc.zip", "hash": "fjTN8Jk3lxuvmyej8d23Ad-Vw1f4aK42_NTTIZ5TFF0", "latestVersion": "https://meta.icos-cp.eu/objects/fjTN8Jk3lxuvmyej8d23Ad-V", "parentCollections": [], "pid": "11676/fjTN8Jk3lxuvmyej8d23Ad-V", "references": { "authors": [{ "email": "bdasgupta03@gmail.com", "firstName": "Bibhasvata", "lastName": "Dasgupta", "orcid": "0000-0002-9324-8122", "self": { "comments": [], "uri": "http://meta.icos-cp.eu/resources/people/Bibhasvata_Dasgupta" } }, { "email": "malika.menoud@lsce.ipsl.fr", "firstName": "Malika", "lastName": "Menoud", "orcid": "0000-0001-7061-2684", "self": { "comments": [], "uri": "http://meta.icos-cp.eu/resources/people/Malika_Menoud" } }, { "email": "c.vanderVeen@uu.nl", "firstName": "Carina", "lastName": "van der Veen", "orcid": "0000-0001-6827-9616", "self": { "comments": [], "label": "Carina van der Veen", "uri": "http://meta.icos-cp.eu/resources/people/Carina_van_der_Veen" } }, { "email": "ingeborg.levin@iup.uni-heidelberg.de", "firstName": "Ingeborg", "lastName": "Levin", "orcid": "0000-0001-9997-2421", "self": { "comments": [], "uri": "http://meta.icos-cp.eu/resources/people/Ingeborg_Levin" } }, { "email": "heiko.moossen@bgc-jena.mpg.de", "firstName": "Heiko", "lastName": "Moossen", "orcid": "0000-0003-4768-2603", "self": { "comments": [], "uri": "http://meta.icos-cp.eu/resources/people/Heiko_Moossen" } }, { "email": "sylvia.michel@colorado.edu", "firstName": "Sylvia", "lastName": "Englund Michel", "orcid": "0000-0002-5651-1163", "self": { "comments": [], "uri": "http://meta.icos-cp.eu/resources/people/Sylvia_Englund-Michel" } }, { "email": "Peter.Sperlich@niwa.co.nz", "firstName": "Peter", "lastName": "Sperlich", "orcid": "0000-0003-1455-0903", "self": { "comments": [], "uri": "http://meta.icos-cp.eu/resources/people/Peter_Sperlich" } }, { "email": "mon@tohoku.ac.jp", "firstName": "Shinji", "lastName": "Morimoto", "orcid": "0000-0001-7858-5430", "self": { "comments": [], "uri": "http://meta.icos-cp.eu/resources/people/Shinji_Morimoto" } }, { "email": "ryo.fujita@mri-jma.go.jp", "firstName": "Ryo", "lastName": "Fujita", "orcid": "0000-0002-8392-0122", "self": { "comments": [], "uri": "http://meta.icos-cp.eu/resources/people/Ryo_Fujita" } }, { "email": "umezawa.taku@nies.go.jp", "firstName": "Taku", "lastName": "Umezawa", "orcid": "0000-0003-1217-7439", "self": { "comments": [], "uri": "http://meta.icos-cp.eu/resources/people/Taku_Umezawa" } }, { "email": "sp@nilu.no", "firstName": "Stephen Matthew", "lastName": "Platt", "orcid": "0000-0002-8439-6633", "self": { "comments": [], "uri": "http://meta.icos-cp.eu/resources/people/Stephen%20Matthew_Platt" } }, { "email": "cgz@nilu.no", "firstName": "Christine", "lastName": "Groot Zwaaftink", "orcid": "0000-0002-4286-5438", "self": { "comments": [], "uri": "http://meta.icos-cp.eu/resources/people/Christine_Groot-Zwaaftink" } }, { "email": "clm@nilu.no", "firstName": "Cathrine", "lastName": "Lund Myhre", "orcid": "0000-0003-3587-5926", "self": { "comments": [], "uri": "http://meta.icos-cp.eu/resources/people/Cathrine_Lund%20Myhre" } }, { "email": "r.e.fisher@rhul.ac.uk", "firstName": "Rebecca", "lastName": "Fisher", "orcid": "0000-0002-9262-5467", "self": { "comments": [], "uri": "http://meta.icos-cp.eu/resources/people/Rebecca%20Fisher" } }, { "email": "D.Lowry@rhul.ac.uk", "firstName": "David", "lastName": "Lowry", "orcid": "0000-0002-8535-0346", "self": { "comments": [], "uri": "http://meta.icos-cp.eu/resources/people/David%20Lowry" } }, { "email": "E.Nisbet@rhul.ac.uk", "firstName": "Euan", "lastName": "Nisbet", "orcid": "0000-0001-8379-857X", "self": { "comments": [], "uri": "http://meta.icos-cp.eu/resources/people/Euan_Nisbet" } }, { "email": "James.France@rhul.ac.uk", "firstName": "James", "lastName": "France", "orcid": "0000-0002-8785-1240", "self": { "comments": [], "uri": "http://meta.icos-cp.eu/resources/people/James_France" } }, { "email": "c.a.woolleymaisch@uu.nl", "firstName": "Ceres", "lastName": "Woolley Maisch", "orcid": "0000-0002-5070-145X", "self": { "comments": [], "uri": "http://meta.icos-cp.eu/resources/people/Ceres_Woolley-Maisch" } }, { "email": "gordon.brailsford@earthsciences.nz", "firstName": "Gordon", "lastName": "Brailsford", "orcid": "0000-0003-1858-5097", "self": { "comments": ["Earth Sciences New Zealand, Wellington, New Zealand (October 2026)"], "uri": "http://meta.icos-cp.eu/resources/people/Gordon_Brailsford" } }, { "email": "Rowena.Moss@niwa.co.nz", "firstName": "Rowena", "lastName": "Moss", "orcid": "0000-0003-2900-071X", "self": { "comments": [], "uri": "http://meta.icos-cp.eu/resources/people/Rowena_Moss" } }, { "email": "goto.daisuke@nipr.ac.jp", "firstName": "Daisuke", "lastName": "Goto", "orcid": "0000-0003-2975-3738", "self": { "comments": [], "uri": "http://meta.icos-cp.eu/resources/people/Daisuke_Goto" } }, { "email": "sudhanshu.pandey@jpl.nasa.gov", "firstName": "Sudhanshu", "lastName": "Pandey", "orcid": "0000-0001-5938-385X", "self": { "comments": [], "uri": "http://meta.icos-cp.eu/resources/people/Sudhanshu_Pandey" } }, { "email": "s.houweling@vu.nl", "firstName": "Sander", "lastName": "Houweling", "orcid": "0000-0002-6189-1009", "self": { "comments": [], "uri": "http://meta.icos-cp.eu/resources/people/Sander_Houweling" } }, { "email": "nicola.warwick@atm.ch.cam.ac.uk", "firstName": "Nicola", "lastName": "Warwick", "orcid": "0000-0003-1840-0283", "self": { "comments": [], "uri": "http://meta.icos-cp.eu/resources/people/Nicola_Warwick" } }, { "email": "t.roeckmann@uu.nl", "firstName": "Thomas", "lastName": "Röckmann", "orcid": "0000-0002-6688-8968", "self": { "comments": [], "uri": "http://meta.icos-cp.eu/resources/people/Thomas%20R%C3%B6ckmann" } }], "citationBibTex": "@misc{https://doi.org/10.18160/v1y4-ntk0,\n doi = {10.18160/V1Y4-NTK0},\n url = {https://meta.icos-cp.eu/objects/fjTN8Jk3lxuvmyej8d23Ad-V},\n author = {Dasgupta, Bibhasvata and Menoud, Malika and van der Veen, Carina and Levin, Ingeborg and Moossen, Heiko and Englund Michel, Sylvia and Sperlich, Peter and Morimoto, Shinji and Fujita, Ryo and Umezawa, Taku and Platt, Stephen Matthew and Groot Zwaaftink, Christine and Lund Myhre, Cathrine and Fisher, Rebecca and Lowry, David and Nisbet, Euan and France, James and Woolley Maisch, Ceres and Brailsford, Gordon and Moss, Rowena and Goto, Daisuke and Pandey, Sudhanshu and Houweling, Sander and Warwick, Nicola and Röckmann, Thomas},\n keywords = {ch4 clumped isotopes, δ13CH4, δDCH3D},\n title = {Harmonised and offset corrected methane isotopic composition (ch4, 13ch4, d2h_ch4) from high northern and southern latitudes},\n publisher = {ICOS ERIC -- Carbon Portal},\n year = {2025},\n copyright = {Creative Commons Attribution 4.0 International}\n}", "citationRis": "TY - DATA\r\nT1 - Harmonised and offset corrected methane isotopic composition (ch4, 13ch4, d2h_ch4) from high northern and southern latitudes\r\nAU - Dasgupta, Bibhasvata\r\nAU - Menoud, Malika\r\nAU - van der Veen, Carina\r\nAU - Levin, Ingeborg\r\nAU - Moossen, Heiko\r\nAU - Englund Michel, Sylvia\r\nAU - Sperlich, Peter\r\nAU - Morimoto, Shinji\r\nAU - Fujita, Ryo\r\nAU - Umezawa, Taku\r\nAU - Platt, Stephen Matthew\r\nAU - Groot Zwaaftink, Christine\r\nAU - Lund Myhre, Cathrine\r\nAU - Fisher, Rebecca\r\nAU - Lowry, David\r\nAU - Nisbet, Euan\r\nAU - France, James\r\nAU - Woolley Maisch, Ceres\r\nAU - Brailsford, Gordon\r\nAU - Moss, Rowena\r\nAU - Goto, Daisuke\r\nAU - Pandey, Sudhanshu\r\nAU - Houweling, Sander\r\nAU - Warwick, Nicola\r\nAU - Röckmann, Thomas\r\nDO - 10.18160/V1Y4-NTK0\r\nUR - https://meta.icos-cp.eu/objects/fjTN8Jk3lxuvmyej8d23Ad-V\r\nAB - This dataset comprises high-precision atmospheric methane (CH4) mole fraction measurements and isotopic compositions (δ13C-CH4 and δD-CH4), collected from eight laboratories operating at high-latitude stations in both hemispheres between 1988 and 2023. Each record includes timestamped values (DateTimeISO, Year, Month, Day, Hour, Minute, Second), laboratory identifiers, CH4 mole fractions and their associated uncertainties, isotopic ratios and uncertainties for both Northern and Southern Hemisphere sites, as well as metadata such as the number of data points and quality flags. The dataset has been harmonised using a nearest-neighbour approach and corrected for interlaboratory offsets to produce hemisphere-specific time series aligned to the MPI-BGC methane isotope and mole fraction scale. All data sources are listed in the included data provider listing. The dataset supports B. Dasgupta et al. (2025). Harmonisation of methane isotope ratio measurements from different laboratories using atmospheric samples, submitted to Atmospheric Measurement Techniques.\r\nKW - ch4 clumped isotopes\r\nKW - δ13CH4\r\nKW - δDCH3D\r\nPY - 2025\r\nPB - ICOS ERIC -- Carbon Portal\r\nER -", "citationString": "Dasgupta, B., Menoud, M., van der Veen, C., Levin, I., Moossen, H., Englund Michel, S., Sperlich, P., Morimoto, S., Fujita, R., Umezawa, T., Platt, S.M., Groot Zwaaftink, C., Lund Myhre, C., Fisher, R., Lowry, D., Nisbet, E., France, J., Woolley Maisch, C., Brailsford, G., Moss, R., Goto, D., Pandey, S., Houweling, S., Warwick, N., Röckmann, T., 2025. Harmonised and offset corrected methane isotopic composition (ch4, 13ch4, d2h_ch4) from high northern and southern latitudes. https://doi.org/10.18160/V1Y4-NTK0", "doi": { "contributors": [{ "affiliation": [], "contributorType": "Producer", "familyName": "Dasgupta", "givenName": "Bibhasvata", "nameIdentifiers": [{ "nameIdentifier": "0000-0002-9324-8122", "nameIdentifierScheme": "ORCID", "schemeUri": "http://orcid.org/" }], "nameType": "Personal" }, { "affiliation": [], "contributorType": "Producer", "familyName": "Menoud", "givenName": "Malika", "nameIdentifiers": [{ "nameIdentifier": "0000-0001-7061-2684", "nameIdentifierScheme": "ORCID", "schemeUri": "http://orcid.org/" }], "nameType": "Personal" }, { "affiliation": [], "contributorType": "Producer", "familyName": "van der Veen", "givenName": "Carina", "nameIdentifiers": [{ "nameIdentifier": "0000-0001-7957-0329", "nameIdentifierScheme": "ORCID", "schemeUri": "http://orcid.org/" }], "nameType": "Personal" }, { "affiliation": [], "contributorType": "Producer", "familyName": "Levin", "givenName": "Ingeborg", "nameIdentifiers": [{ "nameIdentifier": "0000-0001-9997-2421", "nameIdentifierScheme": "ORCID", "schemeUri": "http://orcid.org/" }], "nameType": "Personal" }, { "affiliation": [], "contributorType": "Producer", "familyName": "Moossen", "givenName": "Heiko", "nameIdentifiers": [{ "nameIdentifier": "0000-0003-4768-2603", "nameIdentifierScheme": "ORCID", "schemeUri": "http://orcid.org/" }], "nameType": "Personal" }, { "affiliation": [], "contributorType": "Producer", "familyName": "Englund Michel", "givenName": "Sylvia", "nameIdentifiers": [{ "nameIdentifier": "0000-0002-5651-1163", "nameIdentifierScheme": "ORCID", "schemeUri": "http://orcid.org/" }], "nameType": "Personal" }, { "affiliation": [], "contributorType": "Producer", "familyName": "Sperlich", "givenName": "Peter", "nameIdentifiers": [{ "nameIdentifier": "0000-0003-1455-0903", "nameIdentifierScheme": "ORCID", "schemeUri": "http://orcid.org/" }], "nameType": "Personal" }, { "affiliation": [], "contributorType": "Producer", "familyName": "Morimoto", "givenName": "Shinji", "nameIdentifiers": [{ "nameIdentifier": "0000-0001-7858-5430", "nameIdentifierScheme": "ORCID", "schemeUri": "http://orcid.org/" }], "nameType": "Personal" }, { "affiliation": [], "contributorType": "Producer", "familyName": "Fujita", "givenName": "Ryo", "nameIdentifiers": [{ "nameIdentifier": "0000-0002-8392-0122", "nameIdentifierScheme": "ORCID", "schemeUri": "http://orcid.org/" }], "nameType": "Personal" }, { "affiliation": [], "contributorType": "Producer", "familyName": "Umezawa", "givenName": "Taku", "nameIdentifiers": [{ "nameIdentifier": "0000-0003-1217-7439", "nameIdentifierScheme": "ORCID", "schemeUri": "http://orcid.org/" }], "nameType": "Personal" }, { "affiliation": [], "contributorType": "Producer", "familyName": "Platt", "givenName": "Stephen Matthew", "nameIdentifiers": [{ "nameIdentifier": "0000-0002-8439-6633", "nameIdentifierScheme": "ORCID", "schemeUri": "http://orcid.org/" }], "nameType": "Personal" }, { "affiliation": [], "contributorType": "Producer", "familyName": "Groot Zwaaftink", "givenName": "Christine", "nameIdentifiers": [{ "nameIdentifier": "0000-0002-4286-5438", "nameIdentifierScheme": "ORCID", "schemeUri": "http://orcid.org/" }], "nameType": "Personal" }, { "affiliation": [], "contributorType": "Producer", "familyName": "Lund Myhre", "givenName": "Cathrine", "nameIdentifiers": [{ "nameIdentifier": "0000-0003-3587-5926", "nameIdentifierScheme": "ORCID", "schemeUri": "http://orcid.org/" }], "nameType": "Personal" }, { "affiliation": [], "contributorType": "Producer", "familyName": "Fisher", "givenName": "Rebecca", "nameIdentifiers": [{ "nameIdentifier": "0000-0002-9262-5467", "nameIdentifierScheme": "ORCID", "schemeUri": "http://orcid.org/" }], "nameType": "Personal" }, { "affiliation": [], "contributorType": "Producer", "familyName": "Lowry", "givenName": "David", "nameIdentifiers": [{ "nameIdentifier": "0000-0002-8535-0346", "nameIdentifierScheme": "ORCID", "schemeUri": "http://orcid.org/" }], "nameType": "Personal" }, { "affiliation": [], "contributorType": "Producer", "familyName": "Nisbet", "givenName": "Euan", "nameIdentifiers": [{ "nameIdentifier": "0000-0001-8379-857X", "nameIdentifierScheme": "ORCID", "schemeUri": "http://orcid.org/" }], "nameType": "Personal" }, { "affiliation": [], "contributorType": "Producer", "familyName": "France", "givenName": "James", "nameIdentifiers": [{ "nameIdentifier": "0000-0002-8785-1240", "nameIdentifierScheme": "ORCID", "schemeUri": "http://orcid.org/" }], "nameType": "Personal" }, { "affiliation": [], "contributorType": "Producer", "familyName": "Woolley Maisch", "givenName": "Ceres", "nameIdentifiers": [{ "nameIdentifier": "0000-0002-5070-145X", "nameIdentifierScheme": "ORCID", "schemeUri": "http://orcid.org/" }], "nameType": "Personal" }, { "affiliation": [], "contributorType": "Producer", "familyName": "Brailsford", "givenName": "Gordon", "nameIdentifiers": [{ "nameIdentifier": "0000-0003-1858-5097", "nameIdentifierScheme": "ORCID", "schemeUri": "http://orcid.org/" }], "nameType": "Personal" }, { "affiliation": [], "contributorType": "Producer", "familyName": "Moss", "givenName": "Rowena", "nameIdentifiers": [{ "nameIdentifier": "0000-0003-2900-071X", "nameIdentifierScheme": "ORCID", "schemeUri": "http://orcid.org/" }], "nameType": "Personal" }, { "affiliation": [], "contributorType": "Producer", "familyName": "Goto", "givenName": "Daisuke", "nameIdentifiers": [{ "nameIdentifier": "0000-0003-2975-3738", "nameIdentifierScheme": "ORCID", "schemeUri": "http://orcid.org/" }], "nameType": "Personal" }, { "affiliation": [], "contributorType": "Producer", "familyName": "Pandey", "givenName": "Sudhanshu", "nameIdentifiers": [{ "nameIdentifier": "0000-0001-5938-385X", "nameIdentifierScheme": "ORCID", "schemeUri": "http://orcid.org/" }], "nameType": "Personal" }, { "affiliation": [], "contributorType": "Producer", "familyName": "Houweling", "givenName": "Sander", "nameIdentifiers": [{ "nameIdentifier": "0000-0002-6189-1009", "nameIdentifierScheme": "ORCID", "schemeUri": "http://orcid.org/" }], "nameType": "Personal" }, { "affiliation": [], "contributorType": "Producer", "familyName": "Warwick", "givenName": "Nicola", "nameIdentifiers": [{ "nameIdentifier": "0000-0003-1840-0283", "nameIdentifierScheme": "ORCID", "schemeUri": "http://orcid.org/" }], "nameType": "Personal" }, { "affiliation": [], "contributorType": "Producer", "familyName": "Röckmann", "givenName": "Thomas", "nameIdentifiers": [{ "nameIdentifier": "0000-0002-6688-8968", "nameIdentifierScheme": "ORCID", "schemeUri": "http://orcid.org/" }], "nameType": "Personal" }], "creators": [{ "affiliation": [], "familyName": "Dasgupta", "givenName": "Bibhasvata", "nameIdentifiers": [{ "nameIdentifier": "0000-0002-9324-8122", "nameIdentifierScheme": "ORCID", "schemeUri": "http://orcid.org/" }], "nameType": "Personal" }, { "affiliation": [], "familyName": "Menoud", "givenName": "Malika", "nameIdentifiers": [{ "nameIdentifier": "0000-0001-7061-2684", "nameIdentifierScheme": "ORCID", "schemeUri": "http://orcid.org/" }], "nameType": "Personal" }, { "affiliation": [], "familyName": "van der Veen", "givenName": "Carina", "nameIdentifiers": [{ "nameIdentifier": "0000-0001-7957-0329", "nameIdentifierScheme": "ORCID", "schemeUri": "http://orcid.org/" }], "nameType": "Personal" }, { "affiliation": [], "familyName": "Levin", "givenName": "Ingeborg", "nameIdentifiers": [{ "nameIdentifier": "0000-0001-9997-2421", "nameIdentifierScheme": "ORCID", "schemeUri": "http://orcid.org/" }], "nameType": "Personal" }, { "affiliation": [], "familyName": "Moossen", "givenName": "Heiko", "nameIdentifiers": [{ "nameIdentifier": "0000-0003-4768-2603", "nameIdentifierScheme": "ORCID", "schemeUri": "http://orcid.org/" }], "nameType": "Personal" }, { "affiliation": [], "familyName": "Englund Michel", "givenName": "Sylvia", "nameIdentifiers": [{ "nameIdentifier": "0000-0002-5651-1163", "nameIdentifierScheme": "ORCID", "schemeUri": "http://orcid.org/" }], "nameType": "Personal" }, { "affiliation": [], "familyName": "Sperlich", "givenName": "Peter", "nameIdentifiers": [{ "nameIdentifier": "0000-0003-1455-0903", "nameIdentifierScheme": "ORCID", "schemeUri": "http://orcid.org/" }], "nameType": "Personal" }, { "affiliation": [], "familyName": "Morimoto", "givenName": "Shinji", "nameIdentifiers": [{ "nameIdentifier": "0000-0001-7858-5430", "nameIdentifierScheme": "ORCID", "schemeUri": "http://orcid.org/" }], "nameType": "Personal" }, { "affiliation": [], "familyName": "Fujita", "givenName": "Ryo", "nameIdentifiers": [{ "nameIdentifier": "0000-0002-8392-0122", "nameIdentifierScheme": "ORCID", "schemeUri": "http://orcid.org/" }], "nameType": "Personal" }, { "affiliation": [], "familyName": "Umezawa", "givenName": "Taku", "nameIdentifiers": [{ "nameIdentifier": "0000-0003-1217-7439", "nameIdentifierScheme": "ORCID", "schemeUri": "http://orcid.org/" }], "nameType": "Personal" }, { "affiliation": [], "familyName": "Platt", "givenName": "Stephen Matthew", "nameIdentifiers": [{ "nameIdentifier": "0000-0002-8439-6633", "nameIdentifierScheme": "ORCID", "schemeUri": "http://orcid.org/" }], "nameType": "Personal" }, { "affiliation": [], "familyName": "Groot Zwaaftink", "givenName": "Christine", "nameIdentifiers": [{ "nameIdentifier": "0000-0002-4286-5438", "nameIdentifierScheme": "ORCID", "schemeUri": "http://orcid.org/" }], "nameType": "Personal" }, { "affiliation": [], "familyName": "Lund Myhre", "givenName": "Cathrine", "nameIdentifiers": [{ "nameIdentifier": "0000-0003-3587-5926", "nameIdentifierScheme": "ORCID", "schemeUri": "http://orcid.org/" }], "nameType": "Personal" }, { "affiliation": [], "familyName": "Fisher", "givenName": "Rebecca", "nameIdentifiers": [{ "nameIdentifier": "0000-0002-9262-5467", "nameIdentifierScheme": "ORCID", "schemeUri": "http://orcid.org/" }], "nameType": "Personal" }, { "affiliation": [], "familyName": "Lowry", "givenName": "David", "nameIdentifiers": [{ "nameIdentifier": "0000-0002-8535-0346", "nameIdentifierScheme": "ORCID", "schemeUri": "http://orcid.org/" }], "nameType": "Personal" }, { "affiliation": [], "familyName": "Nisbet", "givenName": "Euan", "nameIdentifiers": [{ "nameIdentifier": "0000-0001-8379-857X", "nameIdentifierScheme": "ORCID", "schemeUri": "http://orcid.org/" }], "nameType": "Personal" }, { "affiliation": [], "familyName": "France", "givenName": "James", "nameIdentifiers": [{ "nameIdentifier": "0000-0002-8785-1240", "nameIdentifierScheme": "ORCID", "schemeUri": "http://orcid.org/" }], "nameType": "Personal" }, { "affiliation": [], "familyName": "Woolley Maisch", "givenName": "Ceres", "nameIdentifiers": [{ "nameIdentifier": "0000-0002-5070-145X", "nameIdentifierScheme": "ORCID", "schemeUri": "http://orcid.org/" }], "nameType": "Personal" }, { "affiliation": [], "familyName": "Brailsford", "givenName": "Gordon", "nameIdentifiers": [{ "nameIdentifier": "0000-0003-1858-5097", "nameIdentifierScheme": "ORCID", "schemeUri": "http://orcid.org/" }], "nameType": "Personal" }, { "affiliation": [], "familyName": "Moss", "givenName": "Rowena", "nameIdentifiers": [{ "nameIdentifier": "0000-0003-2900-071X", "nameIdentifierScheme": "ORCID", "schemeUri": "http://orcid.org/" }], "nameType": "Personal" }, { "affiliation": [], "familyName": "Goto", "givenName": "Daisuke", "nameIdentifiers": [{ "nameIdentifier": "0000-0003-2975-3738", "nameIdentifierScheme": "ORCID", "schemeUri": "http://orcid.org/" }], "nameType": "Personal" }, { "affiliation": [], "familyName": "Pandey", "givenName": "Sudhanshu", "nameIdentifiers": [{ "nameIdentifier": "0000-0001-5938-385X", "nameIdentifierScheme": "ORCID", "schemeUri": "http://orcid.org/" }], "nameType": "Personal" }, { "affiliation": [], "familyName": "Houweling", "givenName": "Sander", "nameIdentifiers": [{ "nameIdentifier": "0000-0002-6189-1009", "nameIdentifierScheme": "ORCID", "schemeUri": "http://orcid.org/" }], "nameType": "Personal" }, { "affiliation": [], "familyName": "Warwick", "givenName": "Nicola", "nameIdentifiers": [{ "nameIdentifier": "0000-0003-1840-0283", "nameIdentifierScheme": "ORCID", "schemeUri": "http://orcid.org/" }], "nameType": "Personal" }, { "affiliation": [], "familyName": "Röckmann", "givenName": "Thomas", "nameIdentifiers": [{ "nameIdentifier": "0000-0002-6688-8968", "nameIdentifierScheme": "ORCID", "schemeUri": "http://orcid.org/" }], "nameType": "Personal" }], "dates": [{ "date": "2025-05-26", "dateType": "Submitted" }, { "date": "2025-05-26", "dateType": "Issued" }, { "date": "2025-05-26", "dateType": "Created" }], "descriptions": [{ "description": "This dataset comprises high-precision atmospheric methane (CH4) mole fraction measurements and isotopic compositions (δ13C-CH4 and δD-CH4), collected from eight laboratories operating at high-latitude stations in both hemispheres between 1988 and 2023. Each record includes timestamped values (DateTimeISO, Year, Month, Day, Hour, Minute, Second), laboratory identifiers, CH4 mole fractions and their associated uncertainties, isotopic ratios and uncertainties for both Northern and Southern Hemisphere sites, as well as metadata such as the number of data points and quality flags. The dataset has been harmonised using a nearest-neighbour approach and corrected for interlaboratory offsets to produce hemisphere-specific time series aligned to the MPI-BGC methane isotope and mole fraction scale. All data sources are listed in the included data provider listing. The dataset supports B. Dasgupta et al. (2025). Harmonisation of methane isotope ratio measurements from different laboratories using atmospheric samples, submitted to Atmospheric Measurement Techniques.", "descriptionType": "Abstract" }], "doi": "10.18160/V1Y4-NTK0", "formats": ["Arbitrary ZIP archive"], "fundingReferences": [], "geoLocations": [{ "geoLocationBox": { "eastBoundLongitude": 180.0, "northBoundLatitude": 90.0, "southBoundLatitude": -90.0, "westBoundLongitude": -180.0 }, "geoLocationPlace": "Global lat/lon box" }], "publicationYear": 2025, "publisher": "ICOS ERIC -- Carbon Portal", "rightsList": [{ "rights": "Creative Commons Attribution 4.0 International", "rightsUri": "https://creativecommons.org/licenses/by/4.0/legalcode" }], "state": "findable", "subjects": [{ "subject": "ch4 clumped isotopes" }, { "subject": "δ13CH4" }, { "subject": "δDCH3D" }], "titles": [{ "title": "Harmonised and offset corrected methane isotopic composition (ch4, 13ch4, d2h_ch4) from high northern and southern latitudes" }], "types": { "resourceType": "atmospheric results archive (ZIP)", "resourceTypeGeneral": "Dataset" }, "url": "https://meta.icos-cp.eu/objects/fjTN8Jk3lxuvmyej8d23Ad-V", "version": "1.0" }, "keywords": ["ch4 clumped isotopes", "δ13CH4", "δDCH3D"], "licence": { "baseLicence": "https://creativecommons.org/licenses/by/4.0", "name": "ICOS CCBY4 Data Licence", "url": "http://meta.icos-cp.eu/ontologies/cpmeta/icosLicence", "webpage": "https://data.icos-cp.eu/licence" }, "temporalCoverageDisplay": "1983-02-15–2024-01-05", "title": "Harmonised and offset corrected methane isotopic composition (ch4, 13ch4, d2h_ch4) from high northern and southern latitudes" }, "size": 35108, "specificInfo": { "description": "This dataset comprises high-precision atmospheric methane (CH4) mole fraction measurements and isotopic compositions (δ13C-CH4 and δD-CH4), collected from eight laboratories operating at high-latitude stations in both hemispheres between 1988 and 2023. Each record includes timestamped values (DateTimeISO, Year, Month, Day, Hour, Minute, Second), laboratory identifiers, CH4 mole fractions and their associated uncertainties, isotopic ratios and uncertainties for both Northern and Southern Hemisphere sites, as well as metadata such as the number of data points and quality flags. The dataset has been harmonised using a nearest-neighbour approach and corrected for interlaboratory offsets to produce hemisphere-specific time series aligned to the MPI-BGC methane isotope and mole fraction scale. All data sources are listed in the included data provider listing. The dataset supports B. Dasgupta et al. (2025). Harmonisation of methane isotope ratio measurements from different laboratories using atmospheric samples, submitted to Atmospheric Measurement Techniques.", "productionInfo": { "contributors": [{ "email": "malika.menoud@lsce.ipsl.fr", "firstName": "Malika", "lastName": "Menoud", "orcid": "0000-0001-7061-2684", "self": { "comments": [], "uri": "http://meta.icos-cp.eu/resources/people/Malika_Menoud" } }, { "email": "c.vanderVeen@uu.nl", "firstName": "Carina", "lastName": "van der Veen", "orcid": "0000-0001-6827-9616", "self": { "comments": [], "label": "Carina van der Veen", "uri": "http://meta.icos-cp.eu/resources/people/Carina_van_der_Veen" } }, { "email": "ingeborg.levin@iup.uni-heidelberg.de", "firstName": "Ingeborg", "lastName": "Levin", "orcid": "0000-0001-9997-2421", "self": { "comments": [], "uri": "http://meta.icos-cp.eu/resources/people/Ingeborg_Levin" } }, { "email": "heiko.moossen@bgc-jena.mpg.de", "firstName": "Heiko", "lastName": "Moossen", "orcid": "0000-0003-4768-2603", "self": { "comments": [], "uri": "http://meta.icos-cp.eu/resources/people/Heiko_Moossen" } }, { "email": "sylvia.michel@colorado.edu", "firstName": "Sylvia", "lastName": "Englund Michel", "orcid": "0000-0002-5651-1163", "self": { "comments": [], "uri": "http://meta.icos-cp.eu/resources/people/Sylvia_Englund-Michel" } }, { "email": "Peter.Sperlich@niwa.co.nz", "firstName": "Peter", "lastName": "Sperlich", "orcid": "0000-0003-1455-0903", "self": { "comments": [], "uri": "http://meta.icos-cp.eu/resources/people/Peter_Sperlich" } }, { "email": "mon@tohoku.ac.jp", "firstName": "Shinji", "lastName": "Morimoto", "orcid": "0000-0001-7858-5430", "self": { "comments": [], "uri": "http://meta.icos-cp.eu/resources/people/Shinji_Morimoto" } }, { "email": "ryo.fujita@mri-jma.go.jp", "firstName": "Ryo", "lastName": "Fujita", "orcid": "0000-0002-8392-0122", "self": { "comments": [], "uri": "http://meta.icos-cp.eu/resources/people/Ryo_Fujita" } }, { "email": "umezawa.taku@nies.go.jp", "firstName": "Taku", "lastName": "Umezawa", "orcid": "0000-0003-1217-7439", "self": { "comments": [], "uri": "http://meta.icos-cp.eu/resources/people/Taku_Umezawa" } }, { "email": "sp@nilu.no", "firstName": "Stephen Matthew", "lastName": "Platt", "orcid": "0000-0002-8439-6633", "self": { "comments": [], "uri": "http://meta.icos-cp.eu/resources/people/Stephen%20Matthew_Platt" } }, { "email": "cgz@nilu.no", "firstName": "Christine", "lastName": "Groot Zwaaftink", "orcid": "0000-0002-4286-5438", "self": { "comments": [], "uri": "http://meta.icos-cp.eu/resources/people/Christine_Groot-Zwaaftink" } }, { "email": "clm@nilu.no", "firstName": "Cathrine", "lastName": "Lund Myhre", "orcid": "0000-0003-3587-5926", "self": { "comments": [], "uri": "http://meta.icos-cp.eu/resources/people/Cathrine_Lund%20Myhre" } }, { "email": "r.e.fisher@rhul.ac.uk", "firstName": "Rebecca", "lastName": "Fisher", "orcid": "0000-0002-9262-5467", "self": { "comments": [], "uri": "http://meta.icos-cp.eu/resources/people/Rebecca%20Fisher" } }, { "email": "D.Lowry@rhul.ac.uk", "firstName": "David", "lastName": "Lowry", "orcid": "0000-0002-8535-0346", "self": { "comments": [], "uri": "http://meta.icos-cp.eu/resources/people/David%20Lowry" } }, { "email": "E.Nisbet@rhul.ac.uk", "firstName": "Euan", "lastName": "Nisbet", "orcid": "0000-0001-8379-857X", "self": { "comments": [], "uri": "http://meta.icos-cp.eu/resources/people/Euan_Nisbet" } }, { "email": "James.France@rhul.ac.uk", "firstName": "James", "lastName": "France", "orcid": "0000-0002-8785-1240", "self": { "comments": [], "uri": "http://meta.icos-cp.eu/resources/people/James_France" } }, { "email": "c.a.woolleymaisch@uu.nl", "firstName": "Ceres", "lastName": "Woolley Maisch", "orcid": "0000-0002-5070-145X", "self": { "comments": [], "uri": "http://meta.icos-cp.eu/resources/people/Ceres_Woolley-Maisch" } }, { "email": "gordon.brailsford@earthsciences.nz", "firstName": "Gordon", "lastName": "Brailsford", "orcid": "0000-0003-1858-5097", "self": { "comments": ["Earth Sciences New Zealand, Wellington, New Zealand (October 2026)"], "uri": "http://meta.icos-cp.eu/resources/people/Gordon_Brailsford" } }, { "email": "Rowena.Moss@niwa.co.nz", "firstName": "Rowena", "lastName": "Moss", "orcid": "0000-0003-2900-071X", "self": { "comments": [], "uri": "http://meta.icos-cp.eu/resources/people/Rowena_Moss" } }, { "email": "goto.daisuke@nipr.ac.jp", "firstName": "Daisuke", "lastName": "Goto", "orcid": "0000-0003-2975-3738", "self": { "comments": [], "uri": "http://meta.icos-cp.eu/resources/people/Daisuke_Goto" } }, { "email": "sudhanshu.pandey@jpl.nasa.gov", "firstName": "Sudhanshu", "lastName": "Pandey", "orcid": "0000-0001-5938-385X", "self": { "comments": [], "uri": "http://meta.icos-cp.eu/resources/people/Sudhanshu_Pandey" } }, { "email": "s.houweling@vu.nl", "firstName": "Sander", "lastName": "Houweling", "orcid": "0000-0002-6189-1009", "self": { "comments": [], "uri": "http://meta.icos-cp.eu/resources/people/Sander_Houweling" } }, { "email": "nicola.warwick@atm.ch.cam.ac.uk", "firstName": "Nicola", "lastName": "Warwick", "orcid": "0000-0003-1840-0283", "self": { "comments": [], "uri": "http://meta.icos-cp.eu/resources/people/Nicola_Warwick" } }, { "email": "t.roeckmann@uu.nl", "firstName": "Thomas", "lastName": "Röckmann", "orcid": "0000-0002-6688-8968", "self": { "comments": [], "uri": "http://meta.icos-cp.eu/resources/people/Thomas%20R%C3%B6ckmann" } }], "creator": { "email": "bdasgupta03@gmail.com", "firstName": "Bibhasvata", "lastName": "Dasgupta", "orcid": "0000-0002-9324-8122", "self": { "comments": [], "uri": "http://meta.icos-cp.eu/resources/people/Bibhasvata_Dasgupta" } }, "dateTime": "2025-05-26T16:10:00Z", "sources": [] }, "spatial": { "_type": "LatLonBox", "geo": { "geometry": { "coordinates": [[[-180.0, -90.0], [-180.0, 90.0], [180.0, 90.0], [180.0, -90.0], [-180.0, -90.0]]], "type": "Polygon" }, "properties": { "label": "Global lat/lon box" }, "type": "Feature" }, "label": "Global lat/lon box", "max": { "lat": 90.0, "lon": 180.0 }, "min": { "lat": -90.0, "lon": -180.0 }, "uri": "http://meta.icos-cp.eu/resources/latlonboxes/globalLatLonBox" }, "temporal": { "interval": { "start": "1983-02-15T00:00:00Z", "stop": "2024-01-05T00:15:46Z" } }, "title": "Harmonised and offset corrected methane isotopic composition (ch4, 13ch4, d2h_ch4) from high northern and southern latitudes" }, "specification": { "dataLevel": 2, "documentation": [], "encoding": { "comments": [], "label": "plain file", "uri": "http://meta.icos-cp.eu/ontologies/cpmeta/plainFileEncoding" }, "format": { "self": { "comments": [], "label": "Arbitrary ZIP archive", "uri": "http://meta.icos-cp.eu/ontologies/cpmeta/zipArchive" }, "uri": "http://meta.icos-cp.eu/ontologies/cpmeta/zipArchive" }, "project": { "self": { "comments": ["Various other data not associated with a specific project"], "label": "Miscellaneous", "uri": "http://meta.icos-cp.eu/resources/projects/misc" } }, "self": { "comments": [], "label": "Atmospheric measurement archive", "uri": "http://meta.icos-cp.eu/resources/cpmeta/atmoMeasArchive" }, "specificDatasetType": "SpatioTemporal", "theme": { "icon": "https://static.icos-cp.eu/images/themes/atm.svg", "markerIcon": "https://static.icos-cp.eu/share/stations/icons/as.png", "self": { "comments": [], "label": "Atmospheric data", "uri": "http://meta.icos-cp.eu/resources/themes/atmosphere" } } }, "submission": { "start": "2025-05-26T15:25:01.987429347Z", "stop": "2025-05-26T15:25:03.073432031Z", "submitter": { "name": "Carbon Portal", "self": { "comments": [], "label": "CP", "uri": "http://meta.icos-cp.eu/resources/organizations/CP" } } } }