Some problems on estimation of volcanic volatile flux

Abstract

Volcanoes are the major degassing source of the earth and we can quantify fluxes of these degassing. Therefore, these fluxes provide us important constraints to understand evolution of the atmosphere and the ocean, and material recycling in the Earth's interior. Volcanic volatile fluxes at the subduction zones are commonly estimated based on 1) flux measurement of various emissions of gases and waters, or 2) magma flux and volatile contents in the magma. We will review these methods and reveal the present status and problems of the flux estimate methods.