地球与行星物理论评（中英文）2026，Vol.57Issue(5)：607-615,9.DOI:10.19975/j.dqyxx.2025-040
云南水管倾斜仪台网的高频背景噪声水平和机理
High-frequency background noise levels on water-tube tiltmeters in Yunnan Province,SW China
摘要
Abstract
The duration of observation of China digital water-tube tiltmeter network has spanned several dec-ades,raising the scientific question regarding the level of high-frequency background noise and the source of the noise.To address this question,this study is the first to examine 11 water-tube tiltmeter observatories in Yunnan Province(SW China)using the power spectral density and probability density function method to establish the high-frequency background noise levels for the water-tube tiltmeters in this region.The findings reveal that:(1)Within the frequency band of 10-4-8.3×10-3 Hz,the background noise level of each observatory exhibits a nonlinear atten-uation pattern as frequency increases;among them,the noise sources in the frequency band of 10-4-5×10-4 Hz are mainly from the fluctuation of barometric pressure,while those in the frequency band of 5×10-4-8.3×10-3 Hz are complicated and diverse.(2)The Mengla,Yunxian,Yunlong,Lijiang,Zhaotong,Yongsheng,Midu,and Baoshan stations had the lowest high-frequency background noise levels,followed by the Chuxiong and Kunming observa-tories,whereas the Eryuan observatory had the highest.(3)Most individual observatories had similar background noise levels between the NS and EW components.These results demonstrate that the above methods and results can provide a reference for the calculation of high-frequency background noise levels of China water-tube tiltmeter net-work and provide empirical evidence for establishing its noise model.关键词
云南/水管倾斜仪/噪声功率谱密度/概率密度函数/高频背景噪声/噪声源Key words
Yunnan/water-tube tiltmeter/noise power spectral density/probability density function/high-fre-quency background noise/noise source分类
天文与地球科学引用本文复制引用
杨小林,危自根,李航,王军..云南水管倾斜仪台网的高频背景噪声水平和机理[J].地球与行星物理论评（中英文）,2026,57(5):607-615,9.基金项目
国家自然科学基金资助项目(42474094) Supported by the National Natural Science Foundation of China(Grant No.42474094) （42474094）
