Figure 2
From: Shallow carbon storage in ancient buried thermokarst in the South Kara Sea
3-D image of the upper sediment cover of the South Kara Sea (see location a-b-c-d in Fig. 1). Shaded gray surface shows high-resolution seismic-derived bathymetry; colored semi-transparent surface indicates unconformity between lower and upper seismic units on top of U-shaped structures (green curves) – remnants of ancient thermokarst. Insets demonstrate the spatial and dimensional similarities between U-shaped structures offshore (middle section) and modern thermokarst lakes onshore Yamal Peninsula (bottom section), which are shown at the same lateral scale. Note different vertical scales (ms and meters); conversion was based on 1600 m/s for acoustic velocity in silt. Satellite image source: “Yamal Peninsula”. 68°55′53 N and 69°24′21 E, eye altitude 12 000 m. Google Earth. December, 2016.
