论文标题
重新访问了时代的准双年展振荡。第二部分：波和强迫的评估
Revisiting the Quasi Biennial Oscillation as Seen in ERA5.Part II: Evaluation of Waves and Wave Forcing
论文作者
论文摘要
本文描述了ERA5重新分析中的平流层波，并评估了不同类型波对准生物振荡（QBO）驱动的贡献。由于与前任相比，它具有更高的空间分辨率，因此ERA5能够解决更广泛的波浪。结果表明，解决的波浪在赤道附近有助于向东和向西加速，这主要是通过层状动量的垂直通量。解析波的向东加速主要是由于开尔文波和小于2000 km的层状波长的小尺度重力（SSG）波，而向西加速度主要由SSG波强迫，由SSG波施加，而SSG波则具有较小的助力，并具有较小的贡献。激进的罗斯比波传播到热带地区，并向向西加速到区域流。它们似乎是QBO循环中至少造成了至少某些不规则性的原因。
This paper describes stratospheric waves in ERA5 reanalysis and evaluates the contributions of different types of waves to the driving of the quasi-biennial oscillation (QBO). Because of its higher spatial resolution compared to its predecessors, ERA5 is capable of resolving a broader spectrum of waves. It is shown that the resolved waves contribute to both eastward and westward accelerations near the equator, mainly by the way of the vertical flux of zonal momentum. The eastward accelerations by the resolved waves are mainly due to Kelvin waves and small-scale gravity (SSG) waves with zonal wavelengths smaller than 2000 km, whereas the westward accelerations are forced mainly by SSG waves, with smaller contributions from inertio-gravity and mixed-Rossby-gravity waves. Extratropical Rossby waves propagate into the tropical region and impart a westward acceleration to the zonal flow. They appear to be responsible for at least some of the irregularities in the QBO cycle.
