GHSZGas Hydrate Stability Zone
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A BSR is also commonly marked by a decrease in P-wave velocity below the GHSZ 39].
Figures 5(b) to 7(b) display the predicted thickness of the GHSZ, the thickness of the GHSZ according to the seismic data and the temperature gradient along the tracks as extracted from our calculated grids (Figures 3, 4, and 8).
Between profile kilometres 0 and 20, observed and synthetic GHSZ thicknesses concur well (250 to 200 m).
Along the profile the misfit between theoretical GHSZ thickness and those from the seismic data (200 to 300 m) differs up to [+ or -] 50 m.
Furthermore, areas with a GHSZ that is thinner than that proposed by the temperature gradient might be under the influence of migrating warm fluids as observed by Zuhlsdorff et al.
Along the East Greenland continental margin the GHSZ is predicted to be rather thick (Figure 4).
In general, GHSZ thins downslope along the western Yermak Plateau slope.
In this way, we consider the condition for which the base of GHSZ is shallower, so more sensitive to climate changes.
The base of the GHSZ is estimated as the intersection between geothermal curve and the gas hydrate stability curve calculated using the Sloan formula [8].
We show the modeled base of the GHSZ for all 10 cases analyzed in Figure 3, showing the depth of the base of GHSZ from seafloor.