Ozone perturbations in the Arctic summer lower stratosphere as a reflection of NOX chemistry and planetary scale wave activity
Ozone perturbations in the Arctic summer lower stratosphere as a reflection of NOX chemistry and planetary scale wave activity
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北极夏季平流层低层的臭氧扰动反映了氮氧化物化学和行星尺度波浪活动
DOI：
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发表时间：
2004
期刊：
影响因子：
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通讯作者：
N. Kawamoto
中科院分区：
文献类型：
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作者：
H. Akiyoshi;T. Sugita;H. Kanzawa;N. Kawamoto
[1]在1997年5月初极涡破裂之后至同年6月底，用改进的临边大气分光计观测到了北方半球高纬度平流层低层臭氧浓度的扰动。利用气候系统研究中心/国家环境研究所进行的模拟和被动示踪实验（CCSR/NIES）的微推化学输送模式（CTM）表明，5月观测到的低臭氧扰动是由北极极涡碎片造成的，而5月底以后则是低纬2号行星波的动力拉长，夏季极地平流层臭氧区是由NOX的催化臭氧破坏循环发展起来的。这些低O3空气质量的不同来源平流或延长从极地地区的ILAS测量点。描述了1997年6月在化学诱导的纬向O3梯度上发生的一个动态O3扰动事件。这些结果表明，极涡破裂的时间和破裂后的行星波活动可能会影响夏季中高纬度平流层低层O3背景梯度。
[1] Ozone concentration perturbations in the high-latitude lower stratosphere in the Northern Hemisphere were observed by Improved Limb Atmospheric Spectrometer (ILAS) after the polar vortex breakdown at the beginning of May 1997 and until the end of June of that same year. Simulations and a passive tracer experiment using the Center for Climate System Research/National Institute for Environmental Studies (CCSR/NIES) nudging chemical transport model (CTM) show that the low-ozone perturbations observed in May were caused by the Arctic polar vortex debris, while those after the end of May resulted from a dynamical elongation due to zonal wave number 2 planetary waves of the low-ozone region in the summer polar stratosphere, which had been developed by the catalytic ozone destruction cycle of NOX. These low-O3 air masses of different origin were advected or elongated from the polar region to the ILAS measurement points. An episodic event of a dynamical O3 perturbation in June 1997 on a chemically induced meridional O3 gradient is described. These results show that a timing of the polar vortex breakdown and activity of planetary waves after the breakdown may affect the O3 background gradient in the summer lower stratosphere at middle and high latitudes.