Solar induced variations of odd nitrogen: Multiple regression analysis of UARS HALOE data
Solar induced variations of odd nitrogen: Multiple regression analysis of UARS HALOE data
复制标题
太阳引起的奇氮变化：UARS HALOE 数据的多元回归分析
DOI：
--
复制
发表时间：
2006
期刊：
影响因子：
--
通讯作者：
B. Soukharev
中科院分区：
文献类型：
--
作者：
L. Hood;B. Soukharev
利用1991-2003年UARS HALOE资料，应用线性多元回归统计模型估算了平流层和中低层氮奇变率的太阳诱导分量。与早期的研究一致，在最高可用纬度（50°- 70°）获得的证据表明，氮氧化物的年代际变化正投射到太阳周期上。这种变化在南半球的统计上最为显著，也与极光Ap指数呈正相关。因此，它可能是由热层和中间层奇氮在极夜期间向下输送引起的。此外，在平流层顶附近和以上的低纬度地区，也获得了太阳反周期NOx变化的证据。这种低纬度响应可能主要是由于太阳极大期条件下NO光解作用增加所致。在平流层其余大部分地区，没有得到统计上显著的响应。
A linear multiple regression statistical model is applied to estimate the solar induced component of odd nitrogen variability in the stratosphere and lower mesosphere using UARS HALOE data for 1991–2003. Consistent with earlier studies, evidence is obtained for a decadal NOx variation at the highest available latitudes (50° – 70°) that projects positively onto the solar cycle. This variation, which is most statistically significant in the Southern Hemisphere, also correlates positively with the auroral Ap index. It is therefore probably caused by downward transport during the polar night of thermospheric and mesospheric odd nitrogen. In addition, at low latitudes near and above the stratopause, evidence is obtained for an inverse solar cycle NOx variation. It is suggested that this low‐latitude response may be caused primarily by increased photolysis of NO under solar maximum conditions. Throughout most of the rest of the stratosphere, no statistically significant response is obtained.