标题： 太阳活动周期23和24期间次表层流场中的QBO型信号 显示英文标题

标题： The QBO-type signals in the subsurface flow fields during solar cycles 23 and 24

摘要： 我们研究了在目标深度0.90$R_{\odot}$、0.95$R_{\odot}$和0.99$R_{\odot}$处以及低纬度(0 -- 30$^{\circ}$)、中纬度(30 -- 50$^{\circ}$)和高纬度(50 -- 70$^{\circ}$)纬度带中的旋转速率残差中准两年振荡(QBOs)的存在及其时空演变。 为了达到这些目标，我们使用了来自Michelson Doppler Imager (MDI)在{\it 太阳和日球层观测台} ({\it SOHO}) 的数据以及来自Helioseismic and Magnetic Imager (HMI)在{\it 太阳动力学观测站} ({\it SDO}) 的数据，分别覆盖太阳活动周期23和24。 结果表明，在每个纬度带和深度中都存在类似QBO的信号，但它们受到更高振幅和更长时间尺度变化的影响。 在每个目标深度和纬度带中发现的类似QBO的信号表现出不同的时空演化。 在QBO时间尺度上，旋转率残差的变化幅度随着深度的增加而增加。 显示英文摘要

摘要： We studied the presence and spatiotemporal evolution of the quasi-biennial oscillations (QBOs) in the rotation rate residuals at target depths of 0.90$R_{\odot}$, 0.95$R_{\odot}$, and 0.99$R_{\odot}$ and at low (0 -- 30$^{\circ}$), mid (30 -- 50$^{\circ}$), and high (50 -- 70$^{\circ}$) latitudinal bands. To achieve these objectives we used data from the Michelson Doppler Imager (MDI) on {\it the Solar and Heliospheric Observatory} ({\it SOHO}) and the Helioseismic and Magnetic Imager (HMI) on the {\it Solar Dynamics Observatory} ({\it SDO}), covering solar cycles 23 and 24, respectively. The results show that there are QBO-like signals in each latitudinal band and depth however they are affected by higher amplitude and longer-time scale variations. The QBO-like signals found in each target depth and latitudinal bands show different spatiotemporal evolution. The amplitudes of variations of the rotation rate residuals in the QBO timescale increase with increasing depth.