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冬给措纳湖位于青藏高原多年冻土区东北部,湖区高寒沼泽、冰缘环境、冻土分布及其演化在全球气候变暖条件下,有其自身特点.为探讨冬给措纳湖湖区冻土分布及冰缘环境,2009年5月9—26日,对冬给措纳湖进行了考察,发现冻融草丘、冻胀丘遗迹、寒冻裂缝、热融洼地、古冻融褶皱等现代冰缘及古冰缘现象在湖区普遍存在.湖东、西岸的沼泽湿地中,热喀斯特发育明显,形成热融洼地和冻融草丘.湖北岸阶地及草场中存在零星和岛状冻土,经钎探表明,当时融化深度为0.3~0.8m,0.4m深度处冻土有胶结冰发育.湖东冲积平原的沼泽湿地中,冻融草丘和热融洼地存在;冻胀丘遗迹、寒冻裂缝在沼泽湿地边缘泥炭覆盖地存在.湖北岸二级阶地剖面发现古冻融褶皱.
Winter to Lake Toba is located in the northeast of the permafrost region on the Qinghai-Tibet Plateau, alpine swamp, ice margin environment, permafrost distribution and its evolution in the global warming conditions, has its own characteristics.In order to explore the winter to the Lake District Frozen soil distribution and the ice edge of the environment, May 2009 9-26, winter to Lake Toba were inspected and found frozen and thawing grass, frozen bulge hill ruins, freezing cracks, hot melt depressions, ancient freeze-thaw creases Other modern ice margins and ancient ice margins prevail in the lake area. In the marsh wetlands of the east and west coasts of the lake, the warm karst developed obviously and formed hot melt depressions and frozen-thawed mounds. There are sporadic and island frozen Soil and brazing exploration showed that the melting depth was 0.3 ~ 0.8m at the time, and the frozen soil developed cementation ice at a depth of 0.4m. In swamp wetlands of the alluvial plain in the East China, frozen-thawing and heat-melting mound existed; Relics and frozen fractures exist in the peat over the edge of the swamp wetlands, and ancient frost-thaw folds are found in the secondary terrace of the Hubei bank.