大气与环境光学学报2025，Vol.20Issue(4)：436-448,13.DOI:10.3969/j.issn.1673-6141.2025.04.002
霾过程大气消光系数时间序列确定性与非线性检验
Deterministic and nonlinear tests of time series of atmospheric extinction coefficient in haze events
摘要
Abstract
The occurrence of haze events is the consequence of complex interactions between aerosols and specific multi-scale processes,including atmospheric boundary layer variations,weather and climate processes,and atmospheric chemical processes.Utilizing the hourly observation data of PM2.5,surface visibility and relative humidity in Chengdu,China,from 2014 to 2017,the atmospheric extinction coefficient time series of six haze events during the observation period were retrieved firstly by Koschmieder's formula.Then based on the phase space reconstruction theory,the optimal delay time τ and the optimal embedding dimension m of the corresponding series were calculated,and the recurrence plot method was used to verify that the atmospheric extinction coefficient time series of the haze events originated from the evolution of the deterministic systems.Finally,the time series nonlinearity of atmospheric extinction coefficient in haze events was tested.The analysis of nonlinear characteristic variables(saturation correlation dimension,maximum Lyapunov exponent and Kolmogorov entropy)showed that the time series of atmospheric extinction coefficient had weak chaotic characteristics,the application of Cao method excluded the possibility that the time series was random,and the further diagnosis of surrogate data method finally determined that the extinction coefficient time series of the haze events were nonlinear.Our findings reveal the complexity of the atmosphere extinction coefficient time series of the haze events and lay the foundation for a deeper understanding of the evolutionary behavior of haze systems.关键词
霾过程/大气消光系数/时间序列/确定性/非线性Key words
haze event/atmospheric extinction coefficient/time series/determinacy/nonlinearity分类
资源环境引用本文复制引用
王思媛,倪长健,孟子圣,石荞语,蒋梦姣,张莹..霾过程大气消光系数时间序列确定性与非线性检验[J].大气与环境光学学报,2025,20(4):436-448,13.基金项目
四川省科技厅应用基础研发项目(2021YJ0314),国家重点研发计划项目(2018YFC0214004,2018YFC1506006) （2021YJ0314）
