Density-stabilized layered system is one of the most fundamental structural units in the Earth. Depending on
density contrast, viscosity contrast, and thickness contrast between the layers this system exhibits various types
of response upon heating. Based on our laboratory experiments by using sugar syrup we show several typical
examples. An interesting behavior is observed at the intermediate range of the density contrast, which may have
an important implication in the interpretation of seismic tomography image. When the bottom of the layered
system is heated a plume composed of the lower and the upper fluid layers is formed and begins to ascent. Heat
is deprived from the plume head and it entrains ambient cold fluid during the course of the ascent. This causes
disruption of the plume;a rising thermal plume and a sinking chemical plume. We discuss consequence of this
disruption phenomena. As for the thermal stability of this layered system we will show a charming experiment
by using miso-soup.
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主催：愛媛大学地球深部ダイナミクス研究センター