Note on air temperature measurement by automatic weather stations in Antarctica

The Tenth Symposium on Polar Science/Ordinary sessions: [OM] Polar Meteorology and Glaciology, Wed. 4 Dec. / Entrance Hall (1st floor) , National Institute of Polar Researc

新領域融合研究プロジェクト「地球環境変動の解析と地球生命システム学の構築」の経過概要

第6回極域科学シンポジウム分野横断セッション：[IB2] 地球環境変動の解析と地球生命システム学の構築11月19日（木）　統計数理研究所 セミナー室1（D305

High temporal resolution chemical analysis of H72 ice core in east Dronning Maud Land, Antarctica

The H72 ice core collected in east Dronning Maud Land, Antarctica has been analyzed in detail. Concentrations of Na^+ and Cl^- indicate the highest correlation coefficients, so we can say that both ions in the H72 ice core originated from sea salt. The fluctuation pattern of δ18O below the depth of 45m proves that the δ^(18)O distribution is smoothed by water vapor diffusion in the firn layer. An increasing tendency of NO_3^- and nssSO_4^(2-) concentrations in the shallow layer has not been found in the H72 ice core. The H72 ice core is dated as AD 1837 by the periodic concentration fluctuation of MSA at 73.29m depth. Volcanic signals are detected in 49 layers in the H72 ice core. In the late 19th century many volcanic eruptions were recorded, which explains why many volcanic signals are present in the H72 ice core. It is noted that a year with low temperatures in winter and a low annual minimum δ^(18)O will have high surface mass balance and more snowfall. Considerable nssSO_4^(2-) has been released into the atmosphere by human activity in the 20th century, but we cannot find traces of a recent increase in deposition of nssSO_4^(2-) at the H72 site

Bacterial diversity in tropical glacier and glacier foreland in Uganda : Glacier ecosystem influence soil formation in glacier foreland

第6回極域科学シンポジウム[OB] 極域生物圏11月16日（月）　国立極地研究所１階交流アトリウ

A 320 k-year record of microparticles in the Dome Fuji, Antarctica ice core measured by laser-light scattering (scientific paper)

A laser-light scattering method was evaluated from the viewpoint of the measurement ability of concentration and size distribution of microparticles in molten ice core samples. It was demonstrated that analysis can be performed with 10 % accuracy by diluting the sample with ultrapure water by 50 times to eliminate coincidence loss. Using this method, the concentration and size distribution of microparticles were determined on 2829 samples from a 2503 m deep ice core drilled at Dome Fuji, Antarctica. The present paper shows the profiles of number and volume concentrations through the whole depth and the changes in the size distribution through three glacial cycles in the past 320 k-years