Destruction of the tertiary ozone maximum during a solar proton event
Destruction of the tertiary ozone maximum during a solar proton event
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DOI：
10.1029/2005gl025571
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发表时间：
2006-04-05
影响因子：
5.2
通讯作者：
Clilverd, MA
中科院分区：
文献类型：
--
作者：
Seppälä, A;Verronen, PT;Clilverd, MA
利用来自GOMOS仪器的臭氧观测以及离子和中性化学耦合模式，研究了2005年1月太阳风暴对极地冬季中大气的影响。模式结果表明，中间层中的HOx和NOx强烈增强，同时臭氧消耗最大可达70-80公里。在强质子强迫期间，戈莫斯的测量显示，在事件发生前在接近72公里的极纬度观测到的第三次臭氧最大值遭到破坏。这一高度与模型结果中最大的HOX增强是同步的。我们第一次观察到了第三次臭氧最大值的消失，并确定了其根本原因。随着质子的下沉，GOMOS的测量显示，第三次臭氧最大值重新出现，到1月24日恢复到正常值。我们的结果表明，即使是中等程度的太阳活动(>；10 MeV质子通量为>；5000 pfu)也会在中层大气造成严重的臭氧消耗(>；70%)。
Ozone observations from the GOMOS instrument together with a coupled ion and neutral chemistry model are used to study the effects of the January 2005 solar storms on the polar winter middle atmosphere. The model results indicate strong HOx and NOx enhancements in the mesosphere, and simultaneous ozone depletion maximizing between 70 - 80 km. During strong proton forcing GOMOS measurements show the destruction of the tertiary ozone maximum, observed at polar latitudes near 72 km before the events. This altitude is concurrent with the largest HOx enhancements in the model results. We observe for the first time the disappearance of the tertiary ozone maximum, and determine the underlying cause. With subsiding proton forcing GOMOS measurements show the reappearance of the tertiary ozone maximum, returning to normal values by January 24. Our results indicate that even moderate solar events (> 10 MeV proton flux of > 5000 pfu) can cause significant ozone depletion (> 70%) in the middle atmosphere.