Weather Causes of 0-6 km Ozone Variation in the Wuyishan Region:An Analysis Based on Radiosonde Observations
DENG Huiying
HUANG Jinhong
ZHAO Rui
JIANG Dongsheng
WANG Hong
Abstract：Based on data from 51 ozone(O3)sounding observations at the Shaowu Station in the Wuyishan region in 2022,this study analyzed the seasonal distribution of O3 in the middle and lower troposphere(0-6 km)and the variation trend of ozone volume mixing ratio(OVMR)in this region.We also explored differences in the atmospheric circulation situation,diagnostic physical quantities,and vertical profiles of 10 cases with column ozone amount(COA)ranking in the top 5 and bottom 5.The results show that the seasonal values of OVMR below the 1.5 km altitude peaks in spring,followed by autumn,summer,and winter,while OVMR above 1.5 km was highest in spring and lowest in summer.Except for autumn,the seasonal distribution of OVMR above 1.5 km showed an increasing trend with height in all seasons.Dominated by the northward flow before the cold high pressure or the easterly flow at the bottom of the high pressure,three of the top 5 cases with COA in the 0-6 km occurred from April to May.The other two cases occurred in September,jointly influenced by the subtropical high and the sinking airflow around the periphery of typhoons.In all 5 cases,stable atmospheric structure was observed in the middle and lower layers of the troposphere.The air was dry with a thin wet layer.Obvious sinking airflow strongly suppressed convection suppression.There were easterly winds in the lower layers with wind speeds ranging from 4-8 m·s-1.Significant differences were observed in the occurrence months,weather conditions,and diagnostic physical quantities between the last 5 cases and the top 5 cases.
Keywords：O3 sounding observationcolumn ozone amount(COA)ozone volume mixing ratio(OVMR)atmospheric profile characteristicsWuyishan region
Publication Date：2024-10-28
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：10( 801-810 )