Abstract

Winters-springs 2019–2020 and 2010–2011 became the periods of the severest ozone events in the Arctic throughout the satellite era. They stemmed from extremely cold and persistent polar stratospheric cloud (PSC) seasons, conducive to record strong chemical ozone destruction. TEMIS observations indicate that the total ozone (TO) column diverged from long-term norm by 45 to 55% in 2020 and by 37 to 44% in 2011 at Arctic sites; and by 27 to 32% in 2020 and by 27 to 36% in 2011 at midlatitudes. Aura MLS profiles showed that the minimum temperature was 8–13% lower than norm over the Arctic in 2020 and 8–12% lower in 2011. The ozone mixing ratios were 4% of the long-term mean at height of 20 km on March 27, 2020 and 25% at height of 21 km on March 20, 2011 for Eureka; and 7% at 19 km on April 19, 2020 and 24% at 20 km on March 20, 2011 for Ny-Ålesund. The divergences in water vapor and ozone mixing ratios, water vapor mixing ratio and temperature, and ozone mixing ratio and temperature show stronger correlations in 2020 than 2011. The correlations weaken equatorward, until becoming almost insignificant at extra-vortex latitudes.

中文翻译：

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使用 TEMIS 和 Aura MLS 数据比较北极和平流层臭氧事件 2011 年和 2020 年

摘要

2019-2020年冬春和2010-2011年成为整个卫星时代北极臭氧事件最严重的时期。它们源于极冷且持续的极地平流层云（PSC）季节，有利于记录强烈的化学臭氧破坏。TEMIS 观测结果表明，北极地区的臭氧总量 (TO) 柱在 2020 年偏离长期正常水平 45% 至 55%，在 2011 年偏离长期正常水平 37% 至 44%；中纬度地区到 2020 年将减少 27% 至 32%，2011 年将减少 27% 至 36%。Aura MLS 剖面显示，2020 年北极最低气温比正常水平低 8-13%，2011 年低 8-12%。3 月份 20 公里高度处的臭氧混合比为长期平均值的 4% 2020年2月27日，尤里卡，2011年3月20日，21公里高度，25%；对于新奥勒松，2020 年 4 月 19 日在 19 公里处的费用为 7%，在 2011 年 3 月 20 日在 20 公里处的费用为 24%。