Fig. 4: Climatic and permafrost response in West Siberia to Early Holocene forcings. | Communications Earth & Environment

Fig. 4: Climatic and permafrost response in West Siberia to Early Holocene forcings.

From: Early Holocene permafrost retreat in West Siberia amplified by reorganization of westerly wind systems

Fig. 4

Comparison of stalagmite K4 with regional proxy records and forcings. High-resolution composites of a atmospheric CO2 in Antarctic ice cores38 (dashed red); and b atmospheric CH4 in Greenland ice cores39 (solid blue). Error bars denote the reported 2-σ analytical uncertainty. c Summer (JJA) insolation at 55oN. Sahara Sand Peatland record of cellulose d δ13C, a proxy for summer T17 (dashed purple); and e δ18O, a proxy for winter T33 (solid light blue). f K4 δ18O (light blue; this study) with 15-point LOESS smoothing (bold line). g K4 δ13C (light green; this study) with 15-point LOESS smoothing (bold line). h Frequency of basal peat core ages in West Siberia42. The geographical locations of proxy records are shown in Fig. 1, excepting the Antarctic ice cores.

Back to article page