专栏名称: 大气化学
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Sci. Adv. | 野火烟雾引起的涡旋使平流层中部的半球气溶胶加倍,并缓冲臭氧消耗

大气化学  · 公众号  ·  · 2024-07-15 18:17

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Smoke-charged vortex doubles hemispheric aerosol in the middle stratosphere and buffers ozone depletion ( 由于标题字数限制, 中文标题为自翻,以原标题为准) Abstract Australian mega-wildfires in the summer of 2019-2020 injected smoke into the stratosphere, causing strong ozone depletion in the lower stratosphere. Here, we model the smoke plume and reproduce its unexpected trajectory toward the middle stratosphere at ~35-kilometer altitude. We show that a smoke-charged vortex (SCV) induced and maintained by absorbing aerosols played a key role in lofting pollutants from the lower stratosphere and nearly doubled the southern hemispheric aerosol burden in the middle stratosphere. The SCV caused a redistribution of stratospheric aerosols, which boosted heterogeneous chemistry in the middle stratosphere and enhanced ozone production, compensating for up to 70% of the ozone depletion in the lower stratosphere. As global warming continues, we expect a growing frequenc ………………………………

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