• ISSN 2097-1893
  • CN 10-1855/P
鲁茂林,易稳,曾洁,薛向辉,叶海伦,陈廷娣. 2024. 基于中国中东部多站流星雷达的二维风场观测研究. 地球与行星物理论评(中英文),55(3):329-343. doi: 10.19975/j.dqyxx.2023-044
引用本文: 鲁茂林,易稳,曾洁,薛向辉,叶海伦,陈廷娣. 2024. 基于中国中东部多站流星雷达的二维风场观测研究. 地球与行星物理论评(中英文),55(3):329-343. doi: 10.19975/j.dqyxx.2023-044
Lu M L, Yi W, Zeng J, Xue X H, Ye H L, Chen T D. 2024. Two-dimensional wind field observation based on multistatic meteor radars in central and eastern China. Reviews of Geophysics and Planetary Physics, 55(3): 329-343 (in Chinese). doi: 10.19975/j.dqyxx.2023-044
Citation: Lu M L, Yi W, Zeng J, Xue X H, Ye H L, Chen T D. 2024. Two-dimensional wind field observation based on multistatic meteor radars in central and eastern China. Reviews of Geophysics and Planetary Physics, 55(3): 329-343 (in Chinese). doi: 10.19975/j.dqyxx.2023-044

基于中国中东部多站流星雷达的二维风场观测研究

Two-dimensional wind field observation based on multistatic meteor radars in central and eastern China

  • 摘要: 全天空流星雷达广泛应用于中间层-低热层大气水平风场的观测,为研究该区域大气风场的变化特征提供了重要数据支持. 目前流星雷达主要采用单站观测模式,没有水平分辨率,并且只能探测流星区域的大气平均水平风场. 为了得到更加丰富且精准的中间层-低热层大气风场信息,本研究介绍了建设在中国安徽地区的多站流星雷达系统,该系统包括安装在蒙城(33.36 °N, 116.49 °E)的一台单站流星雷达和长丰(31.98 °N, 117.22 °E)的一台远程接收机,两地直线距离约为167 km. 相比于单站流星雷达,多站流星雷达系统探测到的前向散射流星数目增加了约70%,并且一般可以提供400 km × 400 km以上的水平观测区域. 除此之外,多站流星雷达系统还可以提供更加丰富的流星观测角度. 新多站系统可以实现中间层-低热层大气二维水平风场的观测,在获取平均水平风场以及风场水平梯度的同时,还可以估计水平风场的散度、相对涡度和拉伸、剪切形变信息. 多站流星雷达能够提供更多的水平风场参数,对进一步研究中间层-低热层区域的大气动力学过程具有重要意义. 不仅如此,未来即将建成的多站流星雷达观测网将会实现中国中东部地区上空的中间层-低热层大气高时空分辨率的三维风场观测,这将有利于促进我们对中间层-低热层区域内的各类波动过程的理解.

     

    Abstract: All-sky meteor radars have become a reliable and widely used tool for observing horizontal winds in the mesosphere and lower thermosphere (MLT) region. This provides vital data support for the study of dynamics in this region. Currently, meteor radars mainly operate in single-station observation mode with no horizontal resolution and can only estimate the average horizontal wind field in the meteor region. To obtain more abundant and accurate information about the atmospheric wind field in the MLT region, a multistatic meteor radar system located in Anhui, China was introduced in this study. The radar system consists of a monostatic meteor radar installed in Mengcheng (33.36 °N, 116.49 °E) and a remote receiver installed in Changfeng (31.98 °N, 117.22 °E) at a distance of about 167 km. Compared to the monostatic meteor radar, the multistatic meteor radar system could observe 70% more forward scatter meteor echoes and offer more than 400 km × 400 km horizontal observation area. Moreover, the multistatic meteor radar system provides more abundant viewing angles. This new multistatic system offers the feasibility of retrieving two-dimensional horizontal wind fields and the gradient of horizontal wind as well as estimating the divergence, relative vorticity, stretching and shearing deformation of the horizontal wind field. The multistatic meteor radar system provides more horizontal wind parameters, significantly contributing to the further studies of the atmospheric dynamics process in the MLT region. In addition, multistatic meteor radar observation network upcoming in the future will realize the 3-d wind field with high spatiotemporal resolution in the MLT region above central and eastern China, greatly improving our understanding of the various wave processes in the near space.

     

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