辽宁冰砬山天然次生林内气象要素垂直变化规律

Vertical changing regularity of meteorological elements in natural secondary forest of Binglashan, Liaoning Province

该文以冰砬山天然次生林为研究对象,利用2014-2016年林内梯度观测数据,分析天然次生林内气象要素垂直变化规律,结果表明:天然次生林内平均气温日变化呈单峰型,但通过极端气温统计发现,至少有50%天气不属于此类典型天气;林内存在一个最低气温层,向上或向下气温逐渐升高,并且最低气温层随季节变化而变化,非生长季10 m层气温最低,生长季最低气温层逐步下移,8、9月份4 m层气温最低;空气相对湿度生长季>非生长季,空气相对湿度垂直梯度差生长季>非生长季且白天>夜间;全年风速近似呈"U"字形规律变化,非生长季风速大,生长季风速小,林内风速小,林冠层以上风速大。

Material and energy exchange constantly happened between forest community and surrounding environment. The meteorological elements in the forest are not only the result but also the future condition of this exchange process. Studies on vertical changing regularity of meteorological elements are of great importance to research the physiological process of plants and the carbon and water flux of forest ecosystem. This study was carried out in natural secondary forest of Binglashan, and vertical changing regularity of meteorological elements was studied based on the meteorological gradient observation data during 2014 - 2016. The results indicated that： The daily variation of average temperature in natural secondary forest was uinmodal, however, by extreme temperature statistics, it was found that at least 50% of the weather did not belong to this type; There was a minimum air temperature layer in the forest, the air temperature gradually raised upwards and downwards from this layer, and the minimum temperature layer varied with seasons, the minimum temperature was at 10 m layer in non-growing season and gradually moved downward in growing season, and reached 4 m layer in August and September; Air relative humidity was growing season 〉 non-growing season, vertical gradient difference of air relative humidity was growing season〉 non-growing season and day〉night; The annual wind speed was approximately u-shaped, wind speed was fast in non-growing season, slow in the growing season, slow in forest and faster upper forest.