Atmospheric response to NOy source due to energetic electron precipitation -: art. no. L14811
Atmospheric response to NOy source due to energetic electron precipitation -: art. no. L14811
复制标题
DOI：
10.1029/2005gl023041
复制
发表时间：
2005-07-22
影响因子：
5.2
通讯作者：
Zubov, V
中科院分区：
文献类型：
--
作者：
Rozanov, E;Callis, L;Zubov, V
我们在1987年的化学-气候模式中引入了由高能电子沉淀（EEP）引起的额外NOy源。有EEP和没有EEP的两个模式运行的比较显示，热带和中纬度上空平流层中活性氮增加了约2ppbv。在极地冬季地区上空的平流层上层，模拟的NOy增强达到10 ppbv。据计算，平流层臭氧混合比在中纬度地区减少5%，在南部高纬度地区减少30%。根据地表气温可探测到的变化，可以计算出热带地区平流层中部温度下降0.5 K，南部高纬度地区温度下降2 K。这些结果证实，大气对EEP事件的响应程度可能超过太阳紫外线通量的影响。这些机制在极纬度以外同相工作，但在极纬度内可以相互补偿。
We have introduced additional NOy sources caused by energetic electron precipitation (EEP) during 1987 into a Chemistry-Climate model. Comparison of two model runs with and without EEP reveals increase of reactive nitrogen by about 2 ppbv in the middle stratosphere over the tropical and middle latitudes. In the upper stratosphere over the polar winter regions the simulated NOy enhancement reaches 10 ppbv. Decreases of the ozone mixing ratio in the stratosphere by up to 5% over midlatitudes and up to 30% over southern high-latitudes are calculated. A similar to 0.5 K cooling in the middle stratosphere over the tropics and up to 2 K over southern high-latitudes is calculated with detectable changes in the surface air temperatures. These results confirm that the magnitude of the atmospheric response to EEP events can potentially exceed the effects from solar UV fluxes. These mechanisms work in phase outside polar latitudes, but can compensate each other within polar latitudes.