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由林缘到林内 ,夏季温度有明显的梯度变化。但还未有人对其它季节的温度变化 ,进行研究。自 1 991年 1 0至 1 992年 5月 ,对林缘至原始花旗松林林内的温度 ,进行了连续的实地测量 ,并与相应的夏季温度变化加以比较。主要研究目的 ,是测定沿林缘两侧 ,是否存在有一个最小的温度阈值 ,当温度低于这个阈值时 ,林缘及林内的温度差异会消失。研究中 ,由林缘到 2 4 0 m的林内 ,设立了一条样带 ,并在样带 0 ,3 0 ,60 ,1 2 0 ,1 80 ,和 2 4 0 m,6处装设气象站 ,每 3 0 min连续记录气温、土壤温度和其他微气象指标。通过计算每点的相对温度并同实际温度加以对比 ,夏季和冬季的林缘效应显著性指数 (Significance of edge influences,SEI)进行了分析。此外 ,计算了不同气象条件下的林缘效应深度 (DEI)。结果表明 ,非夏季最小的气温阈值在 0℃左右。土温的变化则因土壤很少结冻 ,而存在明显不同的最小的温度阈值格局。林缘效应对土壤温度的影响 ,比对气温的影响更显著 ,但冬季和夏季之间没有太大的差异。但以 DEI而论 ,林缘效应对气温的影响比较大。对非生长季节气候因子沿林缘梯度的分析。有助于进一步了解几个相关的生物和非生物过程
From the edge of the forest to the forest, the summer temperature has obvious gradient changes. But no one has studied the temperature changes in other seasons. From January 1991 to May 1992, continuous field measurements of the temperature in the forest margin to the original Douglas fir forest were made and compared with the corresponding summer temperature changes. The main research purpose is to determine whether there is a minimum temperature threshold on both sides of the forest edge. When the temperature falls below this threshold, the temperature difference between the forest edge and the forest will disappear. In the study, a sample belt was set up from the edge of the forest to a depth of 240 m and weather stations were installed at the sampling zones of 0, 30, 60, 120, 180, and 240 m The temperature, soil temperature and other micro-meteorological indicators were continuously recorded every 30 min. By calculating the relative temperature of each point and comparing it with the actual temperature, the analysis of Significance of edge influences (SEI) in summer and winter was carried out. In addition, the depth of edge effect (DEI) under different weather conditions was calculated. The results show that the non-summer minimum temperature threshold is about 0 ℃. Soil temperature changes due to little soil freezing, and there is a clear difference between the minimum temperature threshold pattern. The influence of forest edge on soil temperature is more significant than the impact on temperature, but there is not much difference between winter and summer. However, in terms of DEI, the effect of forest edge on temperature is relatively large. Analysis of climatic factors along forest edge in non - growing seasons. Helps to understand more about several related biological and abiotic processes