Enhancement of odd nitrogen modifies mesospheric ozone chemistry during polar winter
Enhancement of odd nitrogen modifies mesospheric ozone chemistry during polar winter
复制标题
奇数氮的增加改变了极地冬季中层臭氧的化学性质
DOI：
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发表时间：
2015
期刊：
影响因子：
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通讯作者：
Ralph Lehmann
中科院分区：
文献类型：
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作者：
P. Verronen;Ralph Lehmann
高能粒子降水（EPP）增强了极地高层大气中的奇态氮（NOx）。模式研究报告了EPP相关的NOx增强引起的中间层臭氧（O3）的太阳周期响应，其中包括在大约80公里处施加垂直NOx通量。然而，当中间层奇氧（Ox = O + O(1D) + O3）损失的主要化学催化剂是奇氢（HOx）时，O3是如何受到影响的，目前还不清楚。在这里，我们使用1 - D大气模型，并展示了增强的NOx如何影响中间层化学和改变HOx分配，从而通过标准的HOx驱动的催化循环导致Ox损失增加。另一方面，由于夜间在HNO3中储存HOx，而白天光解释放HOx，使耗氧量增加较少。我们的研究结果表明，EPP通过增强NOx，可能会对极地冬季的中间层HOx和Ox产生长期影响。
Energetic particle precipitation (EPP) enhances odd nitrogen (NOx) in the polar upper atmosphere. Model studies have reported a solar cycle response in mesospheric ozone (O3) caused by EPP‐related NOx enhancements which are included by applying a vertical NOx flux at around 80 km. However, it is not clear how O3 can be affected when the main chemical catalyst of odd oxygen (Ox = O + O(1D) + O3) loss in the mesosphere is odd hydrogen (HOx). Here we use a 1‐D atmospheric model and show how enhanced NOx affects mesospheric chemistry and changes HOx partitioning, which subsequently leads to increase in Ox loss through standard HOx‐driven catalytic cycles. Another, smaller increase of Ox loss results from HOx storage in HNO3 during night and its release by daytime photodissociation. Our results suggest that EPP, through NOx enhancements, could have a longer‐term effect on mesospheric HOx and Ox in polar winter.