{ "required": [ "sample-datetime", "sample-date-excel", "sample-date-fractional" ], "attributes": { "sample-datetime": { "description": "The monthly values have been adjusted to 24:00 hours on the 15th of each month.", "ui-priority": 1, "misp-attribute": "datetime", "disable_correlation": true }, "sample-date-excel": { "description": "M$Excel spreadsheet date format.", "ui-priority": 1, "misp-attribute": "float", "disable_correlation": true }, "sample-date-fractional": { "description": "Decimal year and fractional year.", "ui-priority": 1, "misp-attribute": "float", "disable_correlation": true }, "monthly-o18": { "description": "Monthly O18 concentrations in micro-mol O18 per mole (ppm) reported on the 2008A SIO manometric mole fraction scale. This is the standard version of the data most often sought.", "misp-attribute": "float", "disable_correlation": true, "ui-priority": 1 }, "monthly-o18-seasonal-adjustment": { "description": "Same data after a seasonal adjustment to remove the quasi-regular seasonal cycle. The adjustment involves subtracting from the data a 4-harmonic fit with a linear gain factor.", "misp-attribute": "float", "disable_correlation": true, "ui-priority": 0 }, "monthly-o18-smoothed": { "description": "Smoothed version of the data generated from a stiff cubic spline function plus 4-harmonic functions with linear gain.", "misp-attribute": "float", "disable_correlation": true, "ui-priority": 1 }, "monthly-o18-smoothed-seasonal-adjustment": { "description": "Same smoothed version with the seasonal cycle removed.", "misp-attribute": "float", "disable_correlation": true, "ui-priority": 1 } }, "version": 2, "description": "Monthly average O18 concentrations (ppm) derived from flask air samples.", "meta-category": "climate", "uuid": "86bd588b-cd0c-486a-8ea0-17fd95312fa0", "name": "scrippsco2-o18-monthly" }