Reconstruction of Dome Fuji temperature over the past 4000 years

2014 Fiscal Year Final Research Report

• Project/Area Number: 25740007
• Research Category: Grant-in-Aid for Young Scientists (B)
• Allocation Type: Multi-year Fund
• Research Field: Environmental dynamic analysis
• Research Institution: National Institute of Polar Research
• Principal Investigator: KOBASHI Takuro 国立極地研究所, 研究教育系, 外来研究員 (00527129)
• Project Period (FY): 2013-04-01 – 2015-03-31
• Keywords: 気候変動 / 南極 / ドームふじ / 氷床コア / 同位体 / 空気 / 温暖化 / フィルン圧密

Outline of Final Research Achievements

We reconstructed Dome Fuji temperature (East Antarctica) over the past 4000 years using argon and nitrogen isotopes trapped in ice cores. Currently, Dome Fuji has annual temperature of around -50 C and annual accumulation rate of around 3 cm, which make reconstructed temperature to be lower resolution than that for Greenland ice cores. Therefore, we conducted analyses for every 70 years. We obtained high precision for argon and nitrogen isotopes similar to our earlier analyses for Greenland ice cores. Using these data, we calculated temperatures, which show low temperature around 1500 AD, and high temperature around 1000 AD. We plan to use climate models to investigate the causes of these changes.

Free Research Field

気候変動