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.

多年冻土发生的深入实地调查。Taisetsu由该项目的成员进行。钻孔岩芯是从冻土中取出的。使用钻孔的地面温度分布也测量了全年与新开发的设备。对温度剖面的连续监测给出了土壤层的年平均温度梯度。温度梯度外推到冻土层表明，多年冻土上限位于550cm深处。在平坦的山顶上观察到地面上活跃的冻裂。在一个冬季，霜裂缝的宽度增加了1cm。泥炭层形成于泥炭沉积较深的地区，在天山附近的野外考察中发现了地面冰体的存在。大雪冰体的成因可能与全新世早期大规模的滑坡有关。

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)。

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

M. Fukuda：“Pingos” Kagaku。

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。

福田正己: 岩波、科学. 59. 145-152 (1989)

福田正美：岩波，《科学》。 59. 145-152 (1989)