Characteristics of Multi-layer Inversions in Hubei Province and Their Influences on Concentrations of Primary Air Pollutants
Cheng Qin
Wang Qinglong
He Huan
Yue Yanyu
Zhan Tian
Abstract：Based on the sounding data of Hubei Province from 2017 to 2021 and combined with the air quality monitoring data,four types of multi-layer inversion characteristics and their influence on the concentrations of primary air pollutants in Hubei Province are analyzed.It has been found that:(1)Multi-layer inversion occurs frequently in Hubei Province with frequency reaching 71.12％,which is much higher than that of single-layer inversion.(2)The inversion frequency and thickness at 08:00 are greater than at 20:00,and the 20:00 inversion intensity is greater than that at 08:00.(3)The monthly variation curves of total frequency,thickness and intensity all present a 'V' shape.The decreasing rate from January to July is smaller than the increasing rate from August to December.(4)The type Ⅳ inversion(SI+EI+LTI)has the most obvious effect on the growth of particulate matter,while the inhibitory effect of type Ⅲ inversion(EI+LTI)on O3 is the most obvious.(5)The particle concentration is positively correlated to the thickness and intensity,and the correlation at 08:00 is more obvious.O3 is negatively correlated to the thickness and intensity of inversion layer,and the correlation at 20:00 is more obvious.
Keywords：multi-layer inversioninversion frequencyinversion intensityinversion thicknessair pollution
Publication Date：2025-09-30
Online Publishing Date：2026-09-12(First online date of this platform, not the publication date of the document)
Pages：9( 12-20 )