Fig. 3.

Hydrological and physiogeographic controls on the age of terrestrial markers in the integrating Eurasian Arctic estuaries: correlation of ∆¹⁴C_{lignin phenols} with runoff rate (A), ∆¹⁴C_{plant wax lipids} with continuous permafrost coverage (B), ∆¹⁴C_{hydroxy phenols} with wetland coverage (C), and ∆¹⁴C_{hydroxy phenols} with runoff rate (D). The blue dotted line in D represents linear correlation for the data of four eastern rivers (P < 0.05, R² = 0.81). *Runoff rate = discharge/basin area. Contents of terrestrial markers are defined in Fig. 2. Further statistical analyses can be found in Fig. S2.