Supplemental Data Table Legends
Table 1. Data from the core of peat from the western edge of Yuanchi Lake. Downcore variations of peat accumulation rates (PAR) in cm/yr, total organic matter (TOC) concentrations in percent sediment dry weight, volcanic ash concentrations in percent sediment dry weight, total n-alkane concentrations in mg/g sediment, total n-alkane concentrations relative to TOC, n-alkane CPI values, n-alkane average chain lengths (ACL), Paq values, and organic carbon accumulation rates (CAR) and 210Pb-inferred ages (from Bao et al., 2010).
Table 2. Data from the core of peat from the southern edge of Yuanchi Lake. Downcore variations of peat accumulation rates (PAR) in cm/yr, total organic matter (TOC) concentrations in percent sediment dry weight, volcanic ash concentrations in percent sediment dry weight, total n-alkane concentrations in mg/g sediment, total n-alkane concentrations relative to TOC, n-alkane CPI values, n-alkane average chain lengths (ACL), Paq values, and organic carbon accumulation rates (CAR) and 210Pb-inferred ages (from Bao et al., 2010).
Table 3. Data from the core of peat from the eastern edge of Yuanchi Lake. Downcore variations of peat accumulation rates (PAR) in cm/yr, total organic matter (TOC) concentrations in percent sediment dry weight, volcanic ash concentrations in percent sediment dry weight, total n-alkane concentrations in mg/g sediment, total n-alkane concentrations relative to TOC, n-alkane CPI values, n-alkane average chain lengths (ACL), Paq values, and organic carbon accumulation rates (CAR) and 210Pb-inferred ages (from Bao et al., 2010).
Table 4. Data from the core of peat from the northern edge of Yuanchi Lake. Downcore variations of peat accumulation rates (PAR) in cm/yr, total organic matter (TOC) concentrations in percent sediment dry weight, volcanic ash concentrations in percent sediment dry weight, total n-alkane concentrations in mg/g sediment, total n-alkane concentrations relative to TOC, n-alkane CPI values, n-alkane average chain lengths (ACL), Paq values, and organic carbon accumulation rates (CAR) and 210Pb-inferred ages (from Bao et al., 2010).

Cited reference
Bao, K., Yu, X.F., Jia, L., & Wang G.P. (2010). Recent Carbon Accumulation in Changbai Mountain Peatlands, Northeast China. Mountain Research & Development, 30, 33-41. http://dx.doi.org/10.1659/MRD-JOURNAL-D-09-00054.1