Reactive nitrogen (NOy) and ozone responses to energetic electron precipitation during Southern Hemisphere winter
Reactive nitrogen (NOy) and ozone responses to energetic electron precipitation during Southern Hemisphere winter
复制标题
南半球冬季活性氮（NOy）和臭氧对高能电子降水的响应
DOI：
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发表时间：
2018
影响因子：
6.3
通讯作者：
K. Walker
中科院分区：
文献类型：
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作者：
D. Surge;K. Walker
抽象的。高能粒子沉淀(EPP)影响
产生活性氮的极地中层大气化学
(NOY)和氢(HOX)物种，然后催化破坏
臭氧。最近，在限制这些方面取得了重大进展
基于高质量的NOY参数化粒子碰撞
观察。在这里，我们研究低(极光)和中(极光)的影响
(辐射带)能量范围电子，分别和组合，在
南方大气中活性氮和氢的种类以及对臭氧的影响
使用SOCOL3-MPIOM化学-气候模式，半球从2002年到2010年的冬季。我们的结果表明，在没有太阳质子事件的情况下，极地中间层中低能电子产生了大部分的NOY。
和同温层。在极涡中，NOY消退并影响臭氧
在较低的海拔，降至约10 百帕。将一年与高电子进行比较
有一个平静期的降水，我们发现在
中层；随着异常向下传播，臭氧减少了15
在冬季的平流层中，卫星证实了这一点
观察。只有在低能电子和中能电子的情况下，我们的模型才能
再现观测到的平流层臭氧异常。
Abstract. Energetic particle precipitation (EPP) affects the
chemistry of the polar middle atmosphere by producing reactive nitrogen
(NOy) and hydrogen (HOx) species, which then catalytically destroy
ozone. Recently, there have been major advances in constraining these
particle impacts through a parametrization of NOy based on high-quality
observations. Here we investigate the effects of low (auroral) and middle
(radiation belt) energy range electrons, separately and in combination, on
reactive nitrogen and hydrogen species as well as on ozone during Southern
Hemisphere winters from 2002 to 2010 using the SOCOL3-MPIOM chemistry-climate model. Our results show that, in the absence of solar proton events, low-energy electrons produce the majority of NOy in the polar mesosphere
and stratosphere. In the polar vortex, NOy subsides and affects ozone
at lower altitudes, down to 10 hPa. Comparing a year with high electron
precipitation with a quiescent period, we found large ozone depletion in the
mesosphere; as the anomaly propagates downward, 15 % less ozone is found
in the stratosphere during winter, which is confirmed by satellite
observations. Only with both low- and middle-energy electrons does our model
reproduce the observed stratospheric ozone anomaly.