Fig. 6: Comparison of biomarker degradation proxies in subsea permafrost with other deposits in northeastern Siberia. | Nature Communications

Fig. 6: Comparison of biomarker degradation proxies in subsea permafrost with other deposits in northeastern Siberia.

From: Organic matter composition and greenhouse gas production of thawing subsea permafrost in the Laptev Sea

Fig. 6

Subsea permafrost (pf.) data represent the thaw fronts of cores 4D-13, 2D-13, and 4D-12 from the Buor-Khaya Bay. Data from previous studies include terrestrial deposits such as Ice Complex deposits (ICD)14,36,44,48, Holocene peat permafrost14,45, Holocene thermokarst (thermok.)36, and active layer material (act. layer)44,45,48, as well as translocated material such as Buor-Khaya Bay surface sediments (mar. sed.)14,42,46, Lena14 and Kolyma47 river suspended matter. Box plots show medians with 25th and 75th percentiles as box limits, minimum/maximum values as whiskers, and numbers of observations in italics (T: thawed; F: frozen at the time of sampling). Degradation proxies include vanillic acid/vanillin (Vd/Vl), syringic acid/syringaldehyde (Sd/Sl), 3,5-dihydroxybenzoic acid/vanillyl (3,5-Bd/V); carbon preference indices (CPI) of HMW n-alkanes and HMW n-alkanoic acids (n-alk. acids), HMW n-alkanoic acid/HMW n-alkane ratios.

Back to article page