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This dataset also includes the output of the four-box troposphere model used to interpret the rIPD. For both excess methane-corrected records, the model output and 1-sigma uncertainty is provided for northern extratropical (30N - 90N) and total tropical (30S - 30N) sources in Tg yr-1. For the NEEM-derived rIPD, sections of the rIPD where atmospheric methane changed rapidly were deemed untrustworthy were removed from the dataset.\r\n\r\nLee, J. E. et al. Excess methane in Greenland ice cores associated with high dust concentrations. Geochimica et cosmochimica acta 270, 409-430 (2020).", "citation": "Riddell-Young, B., Blunier, T., Brook, E. J., Buizert, C., Edwards, J. S., Fischer, H., et al. (2023) \"Atmospheric methane interpolar difference and four-box troposphere model output across the Last Glacial Maximum and Deglaciation\" U.S. Antarctic Program (USAP) Data Center. doi: https://doi.org/10.15784/601736.", "datePublished": "2023-09-29", "keywords": ["Antarctica", "Greenland", "Methane", "Paleoclimate", "West Antarctic Ice Sheet"], "creator": [{"@type": "Person", "additionalType": "geolink:Person", "name": "Buizert, Christo", "email": "buizertc@science.oregonstate.edu", "affiliation": {"@type": "Organization", "name": null}}, {"@type": "Person", "additionalType": "geolink:Person", "name": "Blunier, Thomas", "email": "blunier@nbi.ku.dk", "affiliation": {"@type": "Organization", "name": ""}}, {"@type": "Person", "additionalType": "geolink:Person", "name": "Brook, Edward J.", "email": "brooke@geo.oregonstate.edu", "affiliation": {"@type": "Organization", "name": "104 Wilkinson Hall"}}, {"@type": "Person", "additionalType": "geolink:Person", "name": "Lee, James", "email": null, "affiliation": {"@type": "Organization", "name": null}}, {"@type": "Person", "additionalType": "geolink:Person", "name": "Edwards, Jon S.", "email": null, "affiliation": {"@type": "Organization", "name": null}}, {"@type": "Person", "additionalType": "geolink:Person", "name": "Rosen, Julia", "email": null, "affiliation": {"@type": "Organization", "name": null}}, {"@type": "Person", "additionalType": "geolink:Person", "name": "Martin, Kaden", "email": null, "affiliation": {"@type": "Organization", "name": null}}, {"@type": "Person", "additionalType": "geolink:Person", "name": "Riddell-Young, Benjamin", "email": "riddellb@oregonstate.edu", "affiliation": {"@type": "Organization", "name": null}}, {"@type": "Person", "additionalType": "geolink:Person", "name": "M\u00fchl, Michaela", "email": null, "affiliation": {"@type": "Organization", "name": null}}, {"@type": "Person", "additionalType": "geolink:Person", "name": "Schmitt, Jochen", "email": null, "affiliation": {"@type": "Organization", "name": null}}, {"@type": "Person", "additionalType": "geolink:Person", "name": "Fischer, Hubertus", "email": null, "affiliation": {"@type": "Organization", "name": null}}], "distribution": [{"@type": "DataDownload", "additionalType": "http://www.w3.org/ns/dcat#DataCatalog", "encodingFormat": "text/xml", "name": "ISO Metadata Document", "url": "https://www.usap-dc.org/metadata/isoxml/601736iso.xml", "contentUrl": "/dataset/filename"}, {"@type": "DataDownload", "@id": "http://dx.doi.org/10.15784/601736", "additionalType": "dcat:distribution", "url": "http://dx.doi.org/10.15784/601736", "contentUrl": "/dataset/filename", "encodingFormat": "text/html"}, {"@type": "DataDownload", "@id": "https://www.usap-dc.org/view/dataset/601736", "additionalType": "dcat:distribution", "url": "https://www.usap-dc.org/view/dataset/601736", "contentUrl": "/dataset/filename", "encodingFormat": "text/html"}], "identifier": {"@type": "PropertyValue", "propertyID": "https://registry.identifiers.org/registry/doi", "value": "doi:10.15784/601736", "url": "https://doi.org/10.15784/601736"}, "contributor": [{"@type": "Role", "roleName": "credit", "description": "funderName:NSF:GEO:OPP:Antarctic Glaciology awardNumber:1745078 awardTitle:Tracing Past Methane Variations with Stable Isotopes in Antarctic Ice Cores"}], "license": [{"@type": "CreativeWork", "URL": "https://creativecommons.org/licenses/by/4.0/", "name": "MD_Constraints", "description": "useLimitation: Creative Commons Attribution Only v4.0 Generic [CC BY 4.0]."}, {"@type": "CreativeWork", "name": "MD_LegalConstraints", "description": "accessConstraints: license. otherConstraints: Creative Commons Attribution Only v4.0 Generic [CC BY 4.0]."}, {"@type": "CreativeWork", "name": "MD_SecurityConstraints", "description": "classification: "}], "publisher": {"@type": "Organization", "name": "U.S. Antarctic Program (USAP) Data Center"}, "spatialCoverage": [{"@type": "Place", "geo": {"@type": "GeoShape", "box": "-79.28 -112.05 -79.28 -112.05"}}]}

Atmospheric methane interpolar difference and four-box troposphere model output across the Last Glacial Maximum and Deglaciation Data DOI: https://doi.org/10.15784/601736 Cite as Riddell-Young, B., Blunier, T., Brook, E. J., Buizert, C., Edwards, J. S., Fischer, H., et al. (2023) "Atmospheric methane interpolar difference and four-box troposphere model output across the Last Glacial Maximum and Deglaciation" U.S. Antarctic Program (USAP) Data Center. doi: https://doi.org/10.15784/601736. AMD - DIF Record(s) USAP-1745078_1 Abstract This dataset includes estimates of the atmospheric methane relative interpolar difference (rIPD) across the Last Glacial Maximum and Deglaciation. The rIPD was calculated using discrete, high-resolution methane measurements from the WAIS Divide, NEEM and GISP2 ice cores. Two independent IPD records were determined: One using NEEM and WAIS and one using GISP2 and WAIS. The dataset includes rIPD values calculated using both Greenland methane data both corrected and uncorrected for excess methane (Lee et al., 2020). The rIPD was calculated by smoothing each methane record and synchronizing them to the WD2014 gas age scale. 1-sigma rIPD uncertainties are included. This dataset also includes the output of the four-box troposphere model used to interpret the rIPD. For both excess methane-corrected records, the model output and 1-sigma uncertainty is provided for northern extratropical (30N - 90N) and total tropical (30S - 30N) sources in Tg yr-1. For the NEEM-derived rIPD, sections of the rIPD where atmospheric methane changed rapidly were deemed untrustworthy were removed from the dataset. Lee, J. E. et al. Excess methane in Greenland ice cores associated with high dust concentrations. Geochimica et cosmochimica acta 270, 409-430 (2020). Creator(s): Riddell-Young, Benjamin; Brook, Edward; Rosen, Julia; Buizert, Christo; Martin, Kaden; Lee, James; Edwards, Jon S.; Mühl, Michaela; Schmitt, Jochen; Fischer, Hubertus; Blunier, Thomas Date Created: 2023-10-02 Repository: USAP-DC (current) License: Creative Commons Attribution Only v4.0 Generic [CC BY 4.0] Spatial Extent(s) West: -112.05, East: -112.05, South: -79.28, North: -79.28 Award(s) NSF 1745078 Version: 1 Related Project(s) Tracing Past Methane Variations with Stable Isotopes in Antarctic Ice Cores Keywords Antarctica Greenland Methane Paleoclimate West Antarctic Ice Sheet