Chemical effects in 11-year solar cycle simulations with the freie universitat Berlin climate middle atmosphere model with online chemistry (FUB-CMAM-CHEM) -: art. no. L13803
Chemical effects in 11-year solar cycle simulations with the freie universitat Berlin climate middle atmosphere model with online chemistry (FUB-CMAM-CHEM) -: art. no. L13803
复制标题
DOI：
10.1029/2005gl022686
复制
发表时间：
2005-07-02
影响因子：
5.2
通讯作者：
Brühl, C
中科院分区：
文献类型：
--
作者：
Langematz, U;Grenfell, JL;Brühl, C
利用带有相互作用化学的FreieUniversitat柏林气候中层大气模式（FUB-CMAM-CHEM）研究了11年太阳活动周期变化对平流层臭氧（O-3）的影响。为了考虑带电粒子沉淀变化的影响，我们在中间层上部包括了一个理想化的NOx源，代表相对论电子沉淀（REP）。我们的研究结果表明，氮氧化物的来源和它的传输从中间层平流层的极涡是重要的太阳信号在平流层O-3。我们发现一个积极的偶极子O-3信号在年平均，峰值在40 - 45公里的高纬度和负O-3信号在热带平流层低。这与观测结果相似，但由于理想化的NOx源和与观测到的最小值相比更低的海拔高度而增强。我们的研究结果表明，这种负的O-3信号部分是通过化学作用产生的。
The impact of 11-year solar cycle variations on stratospheric ozone (O-3) is studied with the Freie Universitat Berlin Climate Middle Atmosphere Model with interactive chemistry (FUB-CMAM-CHEM). To consider the effect of variations in charged particle precipitation we included an idealized NOx source in the upper mesosphere representing relativistic electron precipitation (REP). Our results suggest that the NOx source by particles and its transport from the mesosphere to the stratosphere in the polar vortex are important for the solar signal in stratospheric O-3. We find a positive dipole O-3 signal in the annual mean, peaking at 40 - 45 km at high latitudes and a negative O-3 signal in the tropical lower stratosphere. This is similar to observations, but enhanced due to the idealized NOx source and at a lower altitude compared to the observed minimum. Our results imply that this negative O-3 signal arises partly via chemical effects.