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基于2011年栓皮栎主要生长季(5—8月)的冠层温度数据及同步观测得到的冠层微气象资料,分析了典型晴天和阴天条件下华北低丘山地栓皮栎人工林冠层温度(Tc)的变化特征及其与微气象因子的关系.结果表明:晴天日9:00—16:00,栓皮栎人工林林冠边界层处于不稳定状态,Tc比空气温度(Ta)平均高3.55℃;阴天日Tc的变化较晴天条件下平缓;Tc与Ta、净辐射(Rn)、相对湿度、风速等冠层微气象要素的复相关达极显著水平,其复相关系数为0.825;影响Tc的主要气象因子是Ta和Rn,二者对Tc的影响程度与天气状况有关.
Based on the canopy temperature data from May to August of 2011 and the canopy microcosmic data obtained from simultaneous observations, the canopy temperature of the Quercus variabilis forest in the hilly area of North China in typical sunny and cloudy days Tc) and its relationship with micrometeorological factors were analyzed.The results showed that the canopy boundary layer of Quercus variabilis plantation was unstable at 9: 00-16: 00 on sunny day, Tc was 3.55 ℃ higher than the air temperature (Ta) ; The changes of Tc on cloudy days were milder than those on sunny days; the complex correlation of Tc and Ta, net radiation (Rn), relative humidity, wind speed and other canopy micro-meteorological factors reached extremely significant level, with a complex correlation coefficient of 0.825; Tc The main meteorological factors are Ta and Rn, and their impact on Tc is related to the weather conditions.