著者

菅沼 悠介 石輪 健樹 川又 基人 奥野 淳一 香月 興太 板木 拓也 関 宰 金田 平太郎 松井 浩紀 羽田 裕貴 藤井 昌和 平野 大輔

出版者

公益社団法人 東京地学協会

雑誌

地学雑誌 (ISSN:0022135X)

巻号頁・発行日

vol.129, no.5, pp.591-610, 2020-10-25 (Released:2020-11-13)

参考文献数

101

被引用文献数

1

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The Antarctic Ice Sheet (AIS) is one of the largest potential contributors to future sea-level changes. Recently, an acceleration of AIS volume loss through basal melting and iceberg calving has been reported based on several studies using satellite observations, including radar altimetry, interferometer, and gravity measurements. A recent model that couples ice sheet and climate dynamics and incorporates hydrofracturing mechanism of buttressing ice shelves predicts a higher sea-level rise scenario for the next 500 years. However, the calibration and reproducibility of the sea-level rise projection from these models relies on geological sea-level reconstructions of past warm intervals. This suggests that a highly reliable reconstruction of the past AIS is essential for evaluating its stability and anticipating its contribution to future sea-level rise. In particular, a relative sea-level reconstruction in East Antarctica is the key to solving the problems and refining future projections. The current understanding of sea-level change along the East Antarctic margin is reviewed, including Glacial Isostatic Adjustment (GIA) effects, and a new strategy is proposed to address this topic based on seamless sediment coring from marine to lake in the East Antarctic margin. This project will provide essential data on AIS change since the last interglacial period.

著者

香月 興太 瀬戸 浩二 菅沼 悠介 Dong Yoon YANG

出版者

公益社団法人 東京地学協会

雑誌

地学雑誌 (ISSN:0022135X)

巻号頁・発行日

vol.128, no.3, pp.359-376, 2019-06-25 (Released:2019-07-11)

参考文献数

22

被引用文献数

3 5

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A suitable sampling tool is indispensable for making sediment observation. Eleven portable sediment core samplers using lake sediment observations are introduced: two box core samplers, four dropping core samplers, and five pushing core samplers. Some are popular for making sediment observations. However, others are unique and are not well known, although they have excellent characteristics. Their structures, merits, demerits, and suitable lake conditions are explained. Core samplers introduced are: Ekman-Birge grab sampler, Smith-McIntyre grab sampler, Rigo gravity corer, Limnos corer, Knocking corer, Mackereth piston corer, Proto-type pushing piston corer, Seto-type undisturbed separable piston corer, Suganuma-type portable percussion piston corer, Multisampler, and Russian Peat sampler.