著者

杉山 慎 松野 智 澤柿 教伸 的場 澄人 グレーべ・ラルフ セディック・ハキム フンク・マーティン ゲンコ・リカルド 榎本 浩之 津滝 俊 榊原 大貴 斉藤 潤 大橋 良彦 丸山 未妃呂 片山 直紀 エヴゲニ・ポドルスキ 箕輪 昌紘

出版者

公益社団法人 日本雪氷学会/日本雪工学会

雑誌

雪氷研究大会講演要旨集 (ISSN:18830870)

巻号頁・発行日

vol.2016, 2016

著者

安仁屋 政武 MARINSEK Sebastián 紺屋 恵子 縫村 隆行 津滝 俊 刀根 健太 BARCAZA Gonzalo SKVARCA Pedro 杉山 慎 青木 賢人 松元 高峰 安間 了 内藤 望 榎本 浩之 堀 和明

出版者

公益社団法人 日本雪氷学会

雑誌

氷河情報センター (ISSN:13453807)

巻号頁・発行日

no.29, pp.1-17, 2011

被引用文献数

2 9

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The Glaciological Research Project in Patagonia (GRPP) 2006-2009 was carried out with several objectives at Glaciar Perito Moreno of the Hielo Patagónico Sur (HPS), in the area of the Hielo Patagónico Norte (HPN) and along the Pacific coast. At Glaciar Perito Moreno, hot water drilling was carried out at about 5km upstream from the terminus, reaching the glacier bottom at ca. 515m, in order to monitor subglacial water pressure. Good positive correlations among air temperature, subglacial water pressure and glacier flow speed were found. Based on ¹⁴C dating of tree and organic samples, it is proposed that Glaciar Perito Moreno made two Little Ice Age (LIA) advances at AD1600-1700 and ca. 130-100y BP (AD1820-50). Fan deltas located at the mouth of big rivers around Lago General Carrera (Buenos Aires) and Lago Cochrane (Pueyrredon), in the area east of the HPN, were investigated to elucidate their development. The variations of 21 outlet glaciers of the HPN elucidated from aerial surveys for 2004/05-2008/09 revealed an areal loss of 8.67km² in four years. A general slowing down of retreats was observed with a few exceptions. Meteorological measurements at Glaciar Exploradores of the HPN from 2005 to 2009 indicate that air temperature ranged from 17.4°C to -10.5°C. The total annual precipitation was about 3000mm. Glacier surface melt was observed at two spots. Sediment and water discharges from the glacier showed that while water discharge fluctuated a lot, suspended sediment concentration was rather stable in summer. A single channel seismic profiling during the JAMSTEC MR08-06 cruise identified a probable submerged moraine formed before the last glacial maximum (LGM) in the Golfo de Penas, south of Taitao Peninsula. Piston coring along the Chilean coast further indicates that ice-rafted debris recorded the LGM and earlier Late Pleistocene events of the glacial advance.

著者

Tsutomu SUDA(須田力) Kazuki TAKIZAWA(瀧澤一騎) Nobuyoshi KONISHI(小西信義) Satoshi OMIYA(大宮哲) Shun TSUTAKI(津滝俊)

出版者

公益社団法人 日本雪氷学会

雑誌

Bulletin of Glaciological Research (ISSN:13453807)

巻号頁・発行日

vol.37, pp.11-21, 2019 (Released:2019-11-08)

参考文献数

17

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The purpose of this study was to examine the physiological responses to intensive snow shoveling. The subjects were six males (25-71, 50±8 years) who participated in a snow removal volunteer tour. Prior to the tour, each subject engaged in a cycle ergometer test (Test 1) and a multistage shoveling test (Test 2) to evaluate the relationship between volume of oxygen consumption (VO2) and heart rate. Field measurements were performed in Miruto of Iwamizawa City, Hokkaido, Japan on February 2, 2014. Average air temperatures of that day were -6.3°C in the morning and -1.4°C in the afternoon. The snow layer at the work site had various grain shapes and snow density linearly increased with snow depth. While snow hardness increased exponentially with increase in snow depth. Mean heart rate during working time in the afternoon (142±9 beats min-1) was significantly (p<0.01) higher than that in the morning (131±9 beats min-1). These heart rates correspond 84% and 77% of the predicted maximum heart rate (HRmax), respectively. Ratings of perceived exertion were not different in the morning (12.9±0.4) and afternoon (12.4±0.3). The mean values of VO2 in the total work period (111±3 min) was estimated to be 22.2±1.2ml kg-1min-1 (Metabolic equivalent; 6.4±0.3METs). Estimated energy expenditure averaged 782±46kcal. It is conceivable that increase in snow hardness and snow density caused an increase in work intensity.