华南山区秋冬季节大气光学湍流初步测量分析

通过使用大气相干长度仪测量了华南山区部分月份的昼夜整层大气相干长度,结合使用温度脉动仪获取的近地面部分测量高度的折射率结构常数数据,分析结果表明：在10、11、12月份中,白天11月的测量结果最大,夜间测量结果较为复杂,下半夜的测量数据小于上半夜的测量数据;从频数分布来看,白天中心值为8.5 cm,主要集中在6～12 cm之间,夜间中心值为13.0 cm,主要集中在10～18 cm之间,其平均值明显大于白天的结果; 从近地面层对整层大气湍流强度的贡献来看,白天比夜间受到的影响更为明显。

Abstract

The atmospheric coherence length instrument was used to measure atmospheric coherence length for several months in mountainous area of South China. The results show that atmospheric coherence length of November is greater than that of October and December. The measurement results in night are more complex than those of daytime. The results in latter half of the night are greater than those of first half of the night. The frequency results show that central value of atmospheric coherence length in daytime is 8.5 cm and central value of atmospheric coherence length in night is 13.0 cm. The frequency results of distributing atmospheric coherence length in daytime is mainly center around 6 cm to 12 cm, and the same value in night is mainly center around 10 cm to 18 cm. The mean value of atmospheric coherence length in night is apparently larger than that of daytime. Even the thin layer in surface layer can have much influence on turbulence of the whole atmosphere especially by day.

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吕炜煜, 苑克娥, 魏旭, 胡顺星, 王建国. 华南山区秋冬季节大气光学湍流初步测量分析[J]. 大气与环境光学学报, 2015, 10(3): 216. Lü Weiyu, YUAN Kee, WEI Xu, HU Shunxing, WANG Jianguo. Preliminary Measurements of Atmospheric Turbulence in Autumn and Winter of Southern China Mountain Area[J]. Journal of Atmospheric and Environmental Optics, 2015, 10(3): 216.

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