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鉴于黄河源区实测季节冻土最大冻结深度资料极其匮乏,基于1996～2008年黄河源区及其周边气象站点季节冻土数据,分析了季节冻土最大冻结深度与负积温的关系及时空变化规律,建立了最大冻结深度估算公式,对气温空间插值并由最大负积温和高程估算季节冻土最大冻结深度。结果表明,在季节冻土的迅速发展期,冻结下界深度与负积温呈线性相关;最大冻结深度和最大负积温相关性显著;最大负积温可反映季节冻土随时间的变化趋势;黄河源区仅阿尼玛卿山及其周边存在山地多年冻土,季节冻土最大冻结深度由西北向东南方向递减;气温较高年份中东部地区最大冻结深度明显变小,最大冻结深度小的地区对气候变暖更加敏感;1996～2007年间,最大冻结深度随时间推移呈减小趋势。
In view of the extreme lack of information on the maximum frozen depth of the frozen ground in the source region of the Yellow River, based on the seasonal frozen soil data of the meteorological stations in and around the source region of the Yellow River from 1996 to 2008, the relationship between the maximum frozen depth and negative accumulated temperature , The maximum freezing depth estimation formula was established, the space temperature was interpolated and the maximum frozen depth of seasonal frozen soil was estimated from the maximum negative accumulated temperature and elevation. The results show that there is a linear correlation between the depth of the frozen lower bound and the negative accumulated temperature during the rapid development of seasonal frozen soil. The correlation between the maximum frozen depth and the maximum negative accumulated temperature is significant. The maximum negative accumulated temperature can reflect seasonal variation of the frozen soil over time. Only the permafrost exists in and around the mountain of Annimaqing and the maximum freezing depth of seasonal frozen soil decreases from northwest to southeast. The maximum freezing depth in the middle and eastern regions is obviously smaller and the area with the largest maximum freezing depth is less sensitive to climate Warming more sensitive; from 1996 to 2007, the maximum freezing depth showed a decreasing trend with time.