3 ms·
Its either directly measured or inferred. Ice cores, lake bottom cores, old wood cores. The error bars are wider for some, I'm sure, but that's accounted for in
by ageofwant 11y ago
Its either directly measured or inferred. Ice cores, lake bottom cores, old wood cores. The error bars are wider for some, I'm sure, but that's accounted for in the models, to degrees of course.