Investigation of the Effects of the QBO and the Solar Cycle on the Extratropical Atmosphere

最近的结果表明，太阳/气候关系受到赤道平流层风的调制，即。准两年振荡(QBO)。这些结果表明，从中间层到对流层，大气气象参数对太阳活动的响应似乎依赖于QBO位相。这一关系将在大气变量的范围内加以审查，重点放在QBO和温带外大气之间的联系上。这涉及两个方面的努力：调查太阳/QBO/天气(气候)关系的统计意义，以及研究热带和温带变率之间的动力联系。统计测试将涉及使用从地表到10MB的数据，在所有季节。将特别注意诸如QBO相位的定义、平均周期的选择以及在其中一个或两个QBO相位中进行QBO调制的可能性等细节。对动力学联系的研究将包括检查从地表到1mb的大气数据，以寻找QBO调制温带外大气的证据。由于QBO/温带联系的一种机制可能涉及行星波传播的调制，因此将重点讨论行星波的传播及其与平均气流的相互作用。

Recent results show a sun/climate relationship subject to modulation by equatorial stratospheric winds, viz. the quasibiennial oscillation (QBO). These results show responses of the atmospheric meteorological parameters to solar activity from the mesosphere down to the troposphere seem to be dependent on the QBO phase. This relationship will be examined in the context of atmospheric variables with emphasis on the link between the QBO and the extratropical atmosphere. This involves a two-fold effort: the investigation of the statistical significant of the solar/QBO/weather (climate) relationship, and the study of dynamical links between tropical and extratropical variability. The statistical testing will involve the use of data from the surface to 10 mb, in all seasons. Particular attention will be paid to details such as definition of the QBO phase, selection of averaging periods, and possibilities of QBO modulation in either or both QBO phases. The investigation of dynamical links will involve examining atmospheric data from the surface to 1mb for evidence of QBO modulation of the extratropical atmosphere. Since a mechanism for the QBO/extratropics connection may involve modulation of planetary wave propagation, emphasis will be given to the propagation of planetary waves and their interaction with the mean flow.