"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-c13":{
"description":"Monthly C13 concentrations in micro-mol C13 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-c13-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-c13-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-c13-smoothed-seasonal-adjustment":{
"description":"Same smoothed version with the seasonal cycle removed.",