浙江大学学报（理学版）2025，Vol.52Issue(2)：252-262,282,12.DOI:10.3785/j.issn.1008-9497.2025.02.009
青藏高原臭氧垂直运输特征及其对臭氧分布的影响
Characteristics of vertical ozone transport and its impact on ozone distribution over the Qinghai-Tibet Plateau
摘要
Abstract
This study utilizes the fifth-generation reanalysis data(ERA5)from the European Centre for Medium-Range Weather Forecasts(ECMWF)to investigate the vertical transport characteristics of ozone over the Qinghai-Tibet Plateau across different seasons and their impact on ozone distribution.Through statistical and composite analysis methods,the results indicate that in summer,ozone over the plateau primarily exhibits an upward transport pattern,with a vertical flux of approximately 1× 10-9 kg·m-2 s-1.In winter,the transport direction reverses,showing a downward transport from the stratosphere to the near-surface,with a flux of about 3×10-9 kg·m-2·s-1.Spatially,in summer,ozone concentration at the same altitude increases gradually with latitude.In winter,ozone concentration increases with latitude above 300 hPa,whereas below 300 hPa,it exhibits the opposite trend.Regarding seasonal variations,from summer to winter,the high ozone concentration region shrinks and shifts southward.Furthermore,this study reveals that the downward vertical transport of ozone in winter is a key mechanism leading to the south-high,north-low distribution of tropospheric ozone over the plateau,while the upward transport of low-concentration ozone in summer is a critical factor contributing to the ozone valley in this region.These findings provide important scientific insights into the spatiotemporal distribution of ozone over the Qinghai-Tibet Plateau and its underlying dynamical mechanisms.关键词
臭氧通量/垂直输送/青藏高原/位势涡度/对流层顶Key words
ozone flux/vertical transport/Qinghai-Tibet Plateau/potential vorticity/tropopause分类
大气科学引用本文复制引用
金展,田荣湘,叶一苇,朱彦橙,肖晨宇,施梦丽..青藏高原臭氧垂直运输特征及其对臭氧分布的影响[J].浙江大学学报（理学版）,2025,52(2):252-262,282,12.基金项目
第二次青藏高原综合科学考察研究项目(2019QZKK0103). （2019QZKK0103）
