Stratospheric sudden warming effects on the ionospheric migrating tides during 2008–2010 observed by FORMOSAT-3/COSMIC
Stratospheric sudden warming effects on the ionospheric migrating tides during 2008–2010 observed by FORMOSAT-3/COSMIC
复制标题
FORMOSAT-3/COSMIC观测到的2008-2010年平流层突然变暖对电离层迁移潮的影响
DOI：
10.1016/j.jastp.2013.03.026
复制
发表时间：
2013
影响因子：
1.9
通讯作者：
J. Liu
中科院分区：
文献类型：
--
作者：
Chia;J. T. Lin;L. Chang;W. H. Chen;Chia‐Hung Chen;J. Liu
为了研究2008-2010年平流层突然变暖（SSW）对电离层的影响，将FORMOSAT-3/COSMIC卫星掩星探测所得电离层电子密度分解为各组成潮汐分量。潮汐分析表明，纬向平均和主要迁移潮汐分量（DW1、SW2和TW3）的幅值在SSW时间前后减小，在EIA和中纬度附近的日最大值时间发生相移/时移。同时，平流层温度升高后，SW2和非迁移SW1潮汐持续增强。除了潮汐分量的幅值变化外，电离层迁移潮的相移与平流层温度的相移在三次SSW事件中也有很好的匹配，说明电离层响应的指标较好。虽然2008-2010年SSW事件期间的行星波和大气中层平均风的条件可能有所不同，但电离层潮汐分量及其相移的变化相似。
In this paper, ionospheric electron densities obtained from radio occultation soundings of FORMOSAT-3/COSMIC are decomposed into their various constituent tidal components for studying the stratospheric sudden warming (SSW) effects on the ionosphere during 2008–2010. The tidal analysis indicates that the amplitudes of the zonal mean and major migrating tidal components (DW1, SW2 and TW3) decrease around the time of the SSW, with phase/time shifts in the daily time of maximum around EIA and middle latitudes. Meanwhile consistent enhancements of the SW2 and nonmigrating SW1 tides are seen after the stratospheric temperature increase. In addition to the amplitude changes of the tidal components, well matched phase shifts of the ionospheric migrating tides and the stratospheric temperatures are found for the three SSW events, suggesting a better indicator of the ionospheric response. Although the conditions of the planetary waves and the mean winds in the middle atmosphere region during the 2008–2010 SSW events may be different, similar variations of the ionospheric tidal components and their associated phase shifts are found.