Skip to main content
Progress in Earth and Planetary Science
Fig. 9 | Progress in Earth and Planetary Science

Fig. 9

From: Deep-sea bottom-water environment change caused by sediment resuspension on the continental slope off Sanriku, Japan, before and after the 2011 Tohoku Earthquake

Fig. 9

a–c Vertical profiles of LTA (a), methane (CH4), b and stable carbon isotope ratio of methane (δ13CH4) as functions of potential density (σθ) at five sampling stations (D8, O2, O3, O4, and O5) during cruise KS-15–15. Lines show the studied isopycnal surfaces (27.38σθ: red; 27.56σθ: blue). d Location map and bathymetry of sampling stations during cruise KS-15-15, with the hypocenter of the 2011 Tohoku Earthquake and the earthquake on October 23, 2015 (Mw = 4.9), shown as a red star and a pink star. Bathymetric contours show 200 m depth (solid gray line), 1000 m depth (solid black line), 2000 m depth (dashed black line), and 3000 m depth (dotted black line). The color bar shows the depth of bathymetry. e Keeling plot of concentrations of CH4 and δ13CH4 at five sampling stations (D8, O2, O3, O4, and O5) during cruise KS-15-15. Open circles denote data for the studied isopycnal surfaces (27.38σθ: red; 27.56σθ: blue), and dashed red and dashed blue lines show the respective linear regression lines

Back to article page