ENSO与东亚地区平流层臭氧的联系及其影响机制

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DOI：10.19513/j.cnki.hyqxxb.20241027001

Linkage between ENSO and stratospheric ozone in East Asia and its impact mechanism

LI Yongchi 1，2 ， XU Feng³，CHEN Yanxi4， XU Siyi3 （1.HainanMeteorologicalObservatory，Haikou57O311，China；2.KeyLaboratoryofSouthChinaSeaMeteorological Disaster PreventionandMitigationof Hainan Province，Haikou 57O203，China；3.Collegeof Ocean andMeteorology， Guangdong Ocean University，Zhanjiang 524088，China；4.HainanMeteorological Exploration Center，Haikou ，China）

AbstractEast Asia is one of the regions with the most potential for development and cooperation，and it is of scientific and social significance to study the impact of the El Nino-Southern Oscilation（ENSO）， an interannual climate anomaly signal affcting stratospheric ozone，on the stratospheric ozone in East Asia.Based on the HadISST and ERA5 data from 1979 to 2021，the linkage between ENSO and the stratospheric ozone in East Asia and its impact mechanism are analyzed.The research findings are as follows.（1）ENSO mainly affects the ozone content and distribution in thelower stratosphereof East Asia，showing a significant positive correlation with the ozone content in the lower stratosphere in the ranges of 25∘-30∘N and 70∘-120∘E ，with differences in the effects on positive and negative phases. （2）ENSO influences the stratosphericatmosphere of East Asia through the anomalies of Rossby wave activities.The ENSO-induced anomalies of Rossby wave activities are dominated by the lower stratospheric influence，with positive phases accompanying Rossby wave's upload at low latitudes and afecting East Asia through the northwestward wave flux anomalies from the tropical eastern-central Pacific to East Asia.The wave activities cause the atmosphere in East Asia to undergo meridional shifts and vertical motions，leading to the anomalous ozone content and distribution in this region.（3）In addition，itis found that there is an interdecadal variation in the relationship between ENSO and the stratospheric ozone in East Asia from 1979 to 2O21，which isattributed to thechange in the spatial correlation pattern between ozone and sea surface temperature in the two periods.

KeywordsEl Nino-Southern Oscillation （ENSO）； stratospheric ozone; Rossby wave; East Asia

0 引言

在垂直结构分层中，大气按照温度递减率被分为对流层、平流层、中间层和热层。（剩余16303字）