Permafrost occurrence in Hokkaido and related effect of climatic changes

北海道多年冻土的发生及气候变化的相关影响

• 批准号: 62460234
• 负责人: FUKUDA Masami
• 金额: $ 2.43万
• 依托单位: Hokkaido Universty
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for General Scientific Research (B)
• 财政年份: 1987
• 资助国家: 日本
• 起止时间: 1987 至 1988
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-62460234/
• 关键词: Permafrost; Ground ice; Plasa; Soil wedge; Frost crack; Active layer; 大雪山; 不連続的永久凍土分布; 構造土; 崖錐性斜面; 風穴; 活動層; 凍結深さ

Intensive field investigations on permafrost occurrence in Mt. Taisetsu were conducted by members of this project. Boring cores were taken from the frozen ground. Using bored holes temperature profiles of the ground were also measured for whole year round with newly developed devices. Continuous monitoring of temperature profiles gives mean annual temperature gradients in soil layers. The extra-polation of temperature gradient to the frozen layers indicates that the permafrost table is located at 550cm depth. Active frost cracks on the ground surface were observed on the flat summits. The increase of the width of frost cracks were recorded as 1cm in one winter. The palsas were formed at the area where considerable depth of peat was deposited.The existence of ground ice-body was reported by field survey around Mt. Taisetsu. The genesis of ice-body may related with the large scale land slides at early Holocene.

该项目的成员对大雪山的永久冻土发生情况进行了深入的实地调查。钻孔岩芯是从冰冻的地面上取出的。还利用新开发的设备全年测量钻孔的地面温度分布。连续监测温度剖面可得出土壤层的年平均温度梯度。对冻结层温度梯度的外推表明，多年冻土层位于 550cm 深度。在平坦的山顶上观察到地面上活跃的霜裂。记录一冬冻裂宽度增加1cm。帕尔萨斯是在泥炭沉积相当深度的地区形成的。大雪山周围的实地调查报告了地面冰体的存在。冰体的成因可能与全新世早期的大规模滑坡有关。

项目成果

T.Sone;N.Takahashi;M.Fukuda: Proc.of Fifth International Permafrost Conference,Tronheim,Norway. 1. 253-258 (1988)

T.Sone；N.Takahashi；M.Fukuda：第五届国际永久冻土会议记录，挪威特隆海姆。

福田正己・曽根敏雄・高橋伸幸: 科学朝日. 12. 115-120 (1987)

福田正美、曾根俊夫、高桥伸行：朝日科学 12. 115-120 (1987)。

Masami Fukuda: Proceedings of permafrost Conference Tronheim,Norway. in press. (1988)

福田雅美：挪威特隆海姆永久冻土会议论文集。

M. Fukuda: "Pingos" Kagaku. 59. 145-152 (1989)

M. Fukuda：“Pingos” Kagaku。

T. Sone; N. Takahashi; M. Fukuda: "Alpine permafrost Occurrence at Mt. Taisetsu, Central Hokkaido in Northern JAPAN" Proc. Fifth International Permafrost Conference. 1. 253-258 (1988)

T. 索恩；