论文标题
关于大气年度和半年度振荡的性质和起源
On the Nature and Origin of Atmospheric Annual and Semi-annual Oscillations
论文作者
论文摘要
本文提出了全球海平面压力和地球旋转（RP）变化的联合分析，该变化为旋转极的坐标和一天的长度表示。海平面压力（SLP）提取的组件是一个弱趋势，十一次准周期或周期性组件（$ \ sim $ 130、90、50、50、22、15、15、4、1.8岁），年度周期和前三个谐波。这些时期是地球旋转轴的时空演变的特征，并且具有太阳和陆地物理的许多特征。我们主要关注年度和较小程度的半年度组成部分。 SLP的前三个组成部分的地图（共同占数据差异的85％以上）揭示了有趣的对称性。 The trend is very stable and forms a triskel structure that can be modeled as Taylor-Couette flow of mode 3. The annual component is characterized by a large negative anomaly extending over Eurasia in the NH Summer (and the opposite in the NH Winter) and three large positive anomalies over Australia and the southern tips of South America and South Africa in the SH Spring (and the opposite in the SH Autumn) forming a triskel.半年度组件的特征是在NH春季和秋季（在NH夏季和冬季，相反）以及SH春季和秋季的三个积极异常（一个不规则的Triskel），其稳定的稳定模式由三个大型负疾病组成，该模式由40 $^{\ 60 $^$ -60 $^$^$^$^$^$^$^$^$^$^$^circ} $^$^circ} $^circ} $^circ} $^circ}一个以南极洲为中心的巨大积极异常，其最大流动向澳大利亚，而较小的较小的则以南部非洲为中心。
This paper proposes a joint analysis of variations of global sea-level pressure and of Earth's rotation (RP), expressed as the coordinates of the rotation pole and length of day. Sea-Level-Pressure (SLP) extracted components are a weak trend, eleven quasi-periodic or periodic components ($\sim$130, 90, 50, 22, 15, 4, 1.8 yr), an annual cycle and its first three harmonics. These periods are characteristic of the space-time evolution of the Earth's rotation axis and are present in many characteristic features of solar and terrestrial physics. We focus mainly on the annual and to a lesser extent semi-annual components. Maps of the first three components of SLP (that together comprise more than 85% of the data variance) reveal interesting symmetries. The trend is very stable and forms a triskel structure that can be modeled as Taylor-Couette flow of mode 3. The annual component is characterized by a large negative anomaly extending over Eurasia in the NH Summer (and the opposite in the NH Winter) and three large positive anomalies over Australia and the southern tips of South America and South Africa in the SH Spring (and the opposite in the SH Autumn) forming a triskel. The semi-annual component is characterized by three positive anomalies (an irregular triskel) in the NH Spring and Autumn (and the opposite in the NH Summer and Winter), and in the SH Spring and Autumn by a strong stable pattern consisting of three large negative anomalies forming a clear triskel within the 40$^{\circ}$-60$^{\circ}$ annulus formed by the southern oceans. A large positive anomaly centered over Antarctica, with its maximum displaced toward Australia, and a smaller one centered over Southern Africa complement the pattern.
