气压脉动仪及湍流大气中的气压脉动频谱特征研究  

Research on the Fast-Response Air Pressure Sensor and Spectral Characteristics of the Pressure Fluctuations in the Turbulent Atmosphere

作　　者：卫茁睿 张宏升[1] 李倩惠 任燕 康凌[2] 王鹏飞 刘海波 WEI Zhuorui;ZHANG Hongsheng;LI Qianhui;REN Yan;KANG Ling;WANG Pengfei;LIU Haibo(Laboratory for Climate and Oceanic-Atmosphere Studies,Department of Atmospheric and Oceanic Sciences,School of Physics,Peking University,Beijing 100871;State Key Joint Laboratory of Environmental Simulation and Pollution Control,Department of Environmental Science,Peking University,Beijing 100871;Beijing Intell-Sun Technology Ltd.,Beijing 100107)

机构地区：[1]北京大学物理学院大气与海洋科学系,气候与海‒气实验室,北京100871 [2]北京大学环境科学与工程学院环境科学系,环境模拟与污染控制国家重点联合实验室,北京100871 [3]北京智阳科技有限公司,北京100107

出　　处：《北京大学学报（自然科学版）》2022年第1期186-194,共9页Acta Scientiarum Naturalium Universitatis Pekinensis

基　　金：国家重点研发计划(2017YFC0209600,2016YFC0203300);国家自然科学基金(91837209,41544216);第二次青藏高原综合科学考察与研究计划(2019QZKK0105);新疆维吾尔自治区高层次(柔性)人才引进项目(2018)资助。

摘　　要：基于自制气压脉动仪在内蒙古科尔沁地区大气边界层与大气环境综合实验站2019年夏季的观测资料,计算气压脉动特征参数,分析气压频谱及气压标准差特征。结果表明,自制气压脉动仪能够反映气压的快速变化,频率响应接近1 Hz;气压脉动方差谱曲线在0.0006~0.5 Hz的频率范围内满足n-2标度率,峰值频率低于风速和温度;不同稳定层结条件下的气压脉动归一化方差谱在高频区合并为一条曲线,在低频区根据大气稳定度排列;气压涨落对湍流能量的贡献主要体现在较大尺度上,风速和温度主要体现在较小尺度上;气压标准差和气压脉动强度存在明显的白天强、夜晚弱的日变化特征。Based on the observational data of a self-developed fast-response air pressure sensor at the Atmospheric Boundary Layer and Atmospheric Environment Comprehensive Experimental Station in the Horqin area,Inner Mongolia in the summer of 2019,the characteristic parameters of the pressure fluctuations were calculated,and the spectral characteristics of the pressure fluctuations and the characteristics of the pressure standard deviation were studied.The results show that the self-developed fast-response air pressure sensor can reflect the rapid fluctuations of pressure,and the frequency response is close to 1 Hz.The variance spectra of the pressure fluctuations satisfy the n-2 scaling law in the frequency range from 0.0006 to 0.5 Hz,and the peak frequency is lower than that of the wind speed and temperature.The normalized variance spectra of pressure fluctuations under different atmospheric stabilities merge into a single line in the high-frequency range and distribute around the stability parameter in the low-frequency range.The contribution of pressure fluctuations to turbulent energy is mainly at larger scales,while that of the wind speed and temperature is mainly at smaller scales.The standard deviation and fluctuation intensity of the pressure have obvious diurnal variation characteristics,which is strong during the daytime and weak during the nighttime.

关 键 词：自制气压脉动仪 气压快速涨落 大气湍流动能 气压方差谱分布 

分 类 号：P414.6[天文地球—大气科学及气象学]