利用卫星微波观测亮温监测东北冷涡移动路径
CSTR:
作者:
作者单位:

作者简介:

通讯作者:

中图分类号:

P407.7

基金项目:

国家重点研发计划资助项目(2018YFC1506702)


A comparative study on the movement paths of Northeast China cold vortex between satellite microwave observations and all-sky simulations
Author:
Affiliation:

Fund Project:

  • 摘要
  • |
  • 图/表
  • |
  • 访问统计
  • |
  • 参考文献
  • |
  • 相似文献
  • |
  • 引证文献
  • |
  • 资源附件
  • |
  • 文章评论
    摘要:

    再分析资料已被广泛应用于东北冷涡的研究。这些冷涡常发生在春末夏初,引起低温和雷暴。本文利用MetOp-B先进微波温度探测仪(Advanced Microwave Sounding Unit-A,AMSU-A)的对流层高层通道亮温观测追踪2020年5—7月4个东北冷涡的移动路径。权重函数峰值分别位于250和200 hPa高度的AMSU-A通道7和8的亮度观测具有明显的东北冷涡暖核结构,其时间演变反映平流层空气的持续向南和向下入侵。因此,东北冷涡的移动路径可以根据AMSU-A通道7和8的亮温观测暖核中心位置来确定。虽然再分析资料同化了无线电探空资料以及AMSU-A等其他卫星观测,但依据AMSU-A 单个仪器的观测亮温得到的4个东北冷涡的移动路径与实况分析和ERA5 全天空模拟亮温得到的一致。4个东北冷涡都起源于西伯利亚中部,向东南移动至不同纬度后再转向东、东南或东北移动。MetOp-B是一颗上午星,每日提供两次全球观测。若与晨昏星(FY-3E)和下午星(FY-3D或NOAA-20)构成三轨星座,则可实现对东北冷涡的移动路径每天6次的实时观测。

    Abstract:

    Reanalysis data had extensively employed for investigating of Northeast China Cold Vortices (NCCVs), which frequently occur in late spring and early summer and cause cold temperature and thunderstorms. In this study, the MetOp-B Advanced Microwave Sounding Unit-A (AMSU-A) brightness temperature observations in the upper troposphere were used to track the movement paths of NCCV. Four NCCV cases that occurred in May, June and July 2020 were selected. The brightness temperature observations at AMSU-A channels 7 and 8, whose peak weighting function are located near 250 and 200 hPa vertical levels, respectively, have clear warm core structures, whose temporal evolutions followed a continuing southward and downward intrusion of stratospheric air of NCCVs. The movement paths of NCCV can thus be determined by the center positions of warm cores of brightness temperature observations at AMSU-A channels 7 and 8. The moving paths of the four NCCVs compared favorably with the ERA5 all-sky simulations and operational analysis, which had drawn high-vertical-resolution radiosondes and satellite observations including AMSU-A. Originating in central Siberia, the movement paths of four NCCVs headed southeastward, reaching different latitudes before heading eastward, southeastward or northeastward. MetOp-B is a morning orbit satellite which provides global observations twice daily. Together with microwave temperature-sounding instruments onboard an early-morning (FY-3E) and an afternoon orbit (FY-3D or NOAA-20) satellites, an NCCV moving path can be monitored six times daily with a three-orbit constellation in real time.

    参考文献
    相似文献
    引证文献
引用本文

毛严,邹晓蕾,董慧杰.利用卫星微波观测亮温监测东北冷涡移动路径.气象科学,2024,44(6):1122-1133 MAO Yan, ZOU Xiaolei, DONG Huijie. A comparative study on the movement paths of Northeast China cold vortex between satellite microwave observations and all-sky simulations. Journal of the Meteorological Sciences,2024,44(6):1122-1133

复制
分享
相关视频

文章指标
  • 点击次数:
  • 下载次数:
  • HTML阅读次数:
  • 引用次数:
历史
  • 收稿日期:2024-05-18
  • 最后修改日期:2024-11-20
  • 录用日期:
  • 在线发布日期: 2025-01-08
  • 出版日期:
文章二维码
您是第位访问者
气象科学 ® 2026 版权所有
技术支持:北京勤云科技发展有限公司