{"id": 1206714, "name": "Ozone concentration (1960 = 0)", "unit": "(1960 = 0)", "createdAt": "2026-03-06T11:06:13.000Z", "updatedAt": "2026-05-18T09:22:44.000Z", "coverage": "", "timespan": "1960-2100", "datasetId": 7493, "columnOrder": 0, "shortName": "ozone_concentration__1960__0", "catalogPath": "grapher/climate/2018-07-01/ozone_and_chlorine_projections_to_2100__scientific_assessment__2014/ozone_and_chlorine_projections_to_2100__scientific_assessment__2014#ozone_concentration__1960__0", "type": "float", "dataChecksum": "2572749154298070870", "metadataChecksum": "6941467828570721452", "datasetName": "Ozone and chlorine projections to 2100 (Scientific Assessment, 2014)", "datasetVersion": "2018-07-01", "nonRedistributable": false, "display": {"unit": "(1960 = 0)"}, "schemaVersion": 2, "presentation": {}, "dimensions": {"years": {"values": [{"id": 1960}, {"id": 1965}, {"id": 1970}, {"id": 1975}, {"id": 1980}, {"id": 1985}, {"id": 1990}, {"id": 1995}, {"id": 2000}, {"id": 2005}, {"id": 2010}, {"id": 2015}, {"id": 2020}, {"id": 2025}, {"id": 2030}, {"id": 2035}, {"id": 2040}, {"id": 2045}, {"id": 2050}, {"id": 2055}, {"id": 2060}, {"id": 2065}, {"id": 2070}, {"id": 2075}, {"id": 2080}, {"id": 2085}, {"id": 2090}, {"id": 2095}, {"id": 2100}]}, "entities": {"values": [{"id": 36473, "name": "Antarctic", "code": null}, {"id": 36475, "name": "Arctic", "code": null}, {"id": 272, "name": "Global", "code": null}]}}, "origins": [{"id": 14527, "title": "Twenty questions and answers about the ozone layer: 2014 update", "description": "Figures represent stratospheric ozone, and effective stratospheric chlorine (ESC) based on historical measurement and future projections from chemistry-climate models.\n\nChemistry-climate models are used to make projections of total ozone amounts that account for the effects of ozone-depleting substances (ODSs) and climate change. Regional and global projections are shown for total ozone and ESC for the period 1960\u20132100, referenced to 1960 values (i.e. 1960 = 0).\n\nData is based on those in Q20-2 in 'Twenty questions and answers about the ozone layer: 2014 update', published as the 2014 edition of the Scientific Assessment Panel of the Montreal Protocol.\n\nData was extracted from the static figure, Q0-1, using the extraction tool WebPlotDigitizer (https://apps.automeris.io/wpd/).", "producer": "Hegglin et al.", "citationFull": "Hegglin, M. I., Fahey, D. W., McFarland, M., Montzka, S. A., and Nash, E. R. (2014). Twenty questions and answers about the ozone layer: 2014 update. World Meteorological Organization, UNEP, NOAA, NASA, and European Commission.", "urlMain": "https://public.wmo.int/en/resources/library/twenty-questions-and-answers-about-ozone-layer-2014-update", "dateAccessed": "2018-07-01", "datePublished": "2014"}]}