基于5年OMI卫星数据分析台风对珠三角臭氧廓线变化影响

Analysis of Typhoon Impact on Ozone Profile Changes in the Pearl River Delta Based on 5-Year OMI Satellite Data

在各种观测方法中,卫星遥感具有覆盖范围广、时间序列长、重复频次高的优点,是目前最主要的观测大气臭氧的手段之一。珠三角是我国台风登陆频次最多的地区之一,也是我国受台风影响最大的地区之一,为更好地了解珠三角地区台风登陆前后臭氧廓线变化情况、对台风进行预报预警、防控臭氧污染,本文选用2016.3~2021.2共5年登陆珠三角地区19个单台风登陆前后OMI卫星臭氧廓线,分析单台风登陆珠三角地区前后臭氧廓线的变化情况,结果发现:1) 单台风影响珠三角地区臭氧垂直分布,从而导致臭氧廓线台风前后不同;2) 珠三角单台风大多在夏秋两季登陆;3) 19个单台风案例中,台风后对流层和平流层臭氧柱浓度均降低的案例有12个,对流层和平流层臭氧柱浓度均升高的案例有2个,平流层和对流层臭氧柱浓度变化趋势相反的案例有5个。

Among various observation methods, satellite remote sensing has the advantages of wide coverage, long time series, and high repetition frequency, making it one of the most important means of observing atmospheric ozone at present. The Pearl River Delta is one of the regions with the highest frequency of typhoon landfall in China, and also one of the regions most affected by typhoons. In order to better understand the changes in ozone profiles before and after typhoon landfall in the Pearl River Delta region, predict and warn typhoons, and prevent and control ozone pollution, this article selects OMI satellite ozone profiles before and after 19 single typhoon cases landfall in the Pearl River Delta region from March 2016 to February 2021, and analyzes the changes in ozone profiles before and after single typhoon landfall in the Pearl River Delta region. The results showed that: 1) The single typhoon affects the vertical distribution of ozone in the Pearl River Delta region, resulting in different ozone profiles before and after typhoons;2) Most single typhoons in the Pearl River Delta make landfall in summer and autumn;3) Among the 19 single typhoon cases, there were 12 cases where the concentration of ozone column in the troposphere and stratosphere decreased after the typhoon, 2 cases where the concentration of ozone column in the troposphere and stratosphere increased, and 5 cases where the trend of changes in ozone column concentration in the stratosphere and troposphere was opposite.