post5.4: Use the correct C13/C14 atm ratio in the code more#3632

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ekluzek wants to merge 2 commits intoESCOMP:masterfrom

ekluzek:use_c13c14timeseries_ratio_more

Commits on Oct 26, 2025

Take care of the biggest problems for using c14/c14 timeseries values in place of preindustrial values in the code from issue #3567
ekluzek
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Commits on Feb 3, 2026

Merge branch 'master' into use_c13c14timeseries_ratio_more
ekluzek
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