Development of multiscale and quantitative analysis technique of aerosol contained in ice core using small angle scattering

2017 Fiscal Year Final Research Report

• Project/Area Number: 15K13567
• Research Category: Grant-in-Aid for Challenging Exploratory Research
• Allocation Type: Multi-year Fund
• Research Field: Meteorology/Physical oceanography/Hydrology
• Research Institution: Nagaoka University of Technology
• Principal Investigator: Azuma Nobuhiko 長岡技術科学大学, 工学研究科, 学長 (70182996)
• Co-Investigator(Kenkyū-buntansha): 本間 智之 長岡技術科学大学, 工学研究科, 准教授 (50452082)
• Project Period (FY): 2015-04-01 – 2018-03-31
• Keywords: 人工氷 / クリープ / X線小角散乱 / 亜粒界 / 結晶粒 / 氷床

Outline of Final Research Achievements

It is very important to know the behavior of aerosol contained in accumulated snow, which affects climate, in particular in the field of paleoclimate reconstruction and ice sheet modeling. In this study, in order to quantitatively evaluate aerosol particles in the accumulated snow and ice core obtained from Greenland and other north polar regions, we have developed measurement system of the particles using small angle X-ray scattering (SAXS) without melting ice samples. By thinning ice specimen for the SAXS measurement, the penetrative power of X-ray has been increased, and then the behavior of particles before and after the creep deformation is quantitatively evaluated. Based on these experiment, effect of particles on creep deformation has been clarified.

Free Research Field

雪氷学