It is generally accepted that progressive cooling of global climate since the Late Cretaceous results from decreasing partial pressure of atmospheric CO2 (pCO2). However, details on how and why the carbon cycle evolved and how it would affect pCO2 have not been fully resolved. While the long-term decline of pCO2 might be caused by the decrease of volcanic degassing through the negative feedback...

Nitrogen, carbon, hydrogen and sulfur are essential elements for life comprise about 1% of terrestrial planet masses. These dominate planetary surfaces due to their volatile nature, but the Earth's interior also constitutes a major C-H-N-S reservoir. Resolving origin surficial versus deep reservoirs requires past 4.5 Giga-years mantle outgassing ingassing processes be reconstructed, involving m...

A new contactless ultrasonic sonotrode method was previously designed to provide cavitation conditions inside liquid metal. The oscillation of entrapped gas bubbles followed by their final collapse causes extreme pressure changes leading de-agglomeration and the dispersion oxide films. forced wetting particle surfaces degassing are other mechanisms that considered be involved. Previous publicat...

IMPLICATIONS FOR IMPACT-INDUCED DEGASSING OF CaCO3. K. Ishibashi, T. Yagi, and T. Matsui, Dept. of Earth Planet. Sci., Univ. of Tokyo (7-3-1, Hongo, Bunkyo-ku, Tokyo, 113-0033, Japan; [email protected]), 2 Institute for Solid State Physics, Univ. of Tokyo (5-1-5, Kashiwanoha, Kashiwa, Chiba, 277-8581, Japan), Dept. of Complexity Sci. and Eng., Univ. of Tokyo (5-1-5, Kashiwanoha, Kash...

To the Editor — Detailed analysis of volcanic materials1 allows the study of eruptions that have not been witnessed directly. Rotella et al.2 undertake the challenge of interpreting submarine volcaniclastic deposits around Macauley Volcano, part of the Kermadec Arc in the southwest Pacific Ocean. They propose a ‘Tangaroan’ eruption style, based on the textural characteristics of dredged pumice ...