Stratospheric effects of energetic particle precipitation in 2003-2004
Stratospheric effects of energetic particle precipitation in 2003-2004
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DOI：
10.1029/2004gl022003
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发表时间：
2005-03-02
影响因子：
5.2
通讯作者：
Russell, JM
中科院分区：
文献类型：
--
作者：
Randall, CE;Harvey, VL;Russell, JM
从2004年3月到至少7月，北纬高纬度地区平流层上层的NOx （NO和NO2）有所增强。使用多卫星数据分析来检查增强的时间演变，将其置于历史背景中，并调查其起源。在某些地点，增强量比名义增强量高出4倍，至少自1985年以来在北半球是前所未有的。与此同时，在某些情况下，O-3的含量减少了60%以上。分析表明，高能粒子降水导致上层大气产生大量的氮氧化物，从2003年10月下旬的太阳风暴开始，并可能持续到1月。在2004年1月下旬至3月期间，由于特殊的气象条件导致平流层上层出现异常强烈的涡旋，过量的氮氧化物向下输送，导致了指数的增强。
Upper stratospheric enhancements in NOx (NO and NO2) were observed at high northern latitudes from March through at least July of 2004. Multi-satellite data analysis is used to examine the temporal evolution of the enhancements, to place them in historical context, and to investigate their origin. The enhancements were a factor of 4 higher than nominal at some locations, and are unprecedented in the northern hemisphere since at least 1985. They were accompanied by reductions in O-3 of more than 60% in some cases. The analysis suggests that energetic particle precipitation led to substantial NOx production in the upper atmosphere beginning with the remarkable solar storms in late October 2003 and possibly persisting through January. Downward transport of the excess NOx, facilitated by unique meteorological conditions in 2004 that led to an unusually strong upper stratospheric vortex from late January through March, caused the enhancements.