Symbol E
E is a part of this expression. Its role is fixed by the surrounding article and by the operations shown in the formula.
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The instrumental record measures essentially continuously and directly, at sub-part-per-million precision, at Mauna Loa and a global network of comparable stations, and can resolve seasonal cycles as well as the long-term trend [ 1 ] . E(t) , anthropogenic emissions, is compiled from energy and land-use statistics rather than measured atmospherically at all — a different evidentiary category again, closer to an audited inventory than a physical observation.
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Symbol t
t is a part of this expression. Its role is fixed by the surrounding article and by the operations shown in the formula.
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Published contexts (2)
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Equation 3 · Earth Science
Comparing the Main Approaches to Earth Systems and Climate Dynamics
This mathematical expression combines the displayed quantities; its precise role follows from the surrounding article text.
The instrumental record measures essentially continuously and directly, at sub-part-per-million precision, at Mauna Loa and a global network of comparable stations, and can resolve seasonal cycles as well as the long-term trend [ 1 ] . E(t) , anthropogenic emissions, is compiled from energy and land-use statistics rather than measured atmospherically at all — a different evidentiary category again, closer to an audited inventory than a physical observation.
Equation guide → · Article →Equation 5 · Earth Science
Comparing the Main Approaches to Earth Systems and Climate Dynamics
This mathematical expression combines the displayed quantities; its precise role follows from the surrounding article text.
The paleoclimate record measures at discrete points in time — wherever an ice layer happens to have trapped and preserved bubbles cleanly — rather than continuously, and the temporal resolution degrases with depth as layers compress and diffuse; a single ice sample can represent an averaged interval of years to centuries depending on accumulation rate and depth, a resolution loss with no instrumental equivalent. It cannot measure E(t) or the ocean and land flux terms directly at all; those are inferred from the shape of the concentration curve itself combined with independent proxies for ocean circulation and terrestrial productivity, compounding uncertainty rather than…
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