双月刊

ISSN 1006-9895

CN 11-1768/O4

崇左和防城港两地的台风韦帕(201907)降雨雨滴谱对比分析
作者:
作者单位:

1.中山大学大气科学学院;2.广西崇左市气象局;3.南方海洋科学与工程广东省实验室(珠海);4.广西防城区气象局

作者简介:

通讯作者:

基金项目:

国家自然科学基金,省自然科学基金,其它,高校基金


Comparative Analysis of Rainfall Droplet Spectra of Typhoon Wipha (201907) in Chongzuo and Fangchenggang
Author:
Affiliation:

1.School of Atmospheric Sciences, Sun Yat-Sen University;2.Southern Marine Science and Engineering Guangdong Laboratory (Zhuhai);3.Fangcheng District Meteorological Bureau

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
    摘要:

    利用崇左国家气象观测站、防城国家基准气候站的雨滴谱观测数据,结合观测站雨量数据及雷达观测资料,分析2019年8月2日至3日台风“韦帕”影响期间内陆背风侧(LSI)、近海岸迎风侧(WSC)不同降水阶段的雨滴谱结构特征及其差异。结果显示,台风“韦帕”降雨以中、小雨滴贡献为主,尤其中雨滴贡献率稳定在70%以上。LSI处以层状云降水为主,雨强相对平缓,WSC处表现为积层混合云降水,雨强较大且波动剧烈。因强烈的对流上升运动导致WSC的雨滴数浓度、雨滴直径明显大于LSI。LSI处在台风登陆后雨势增强的主要因素是雨滴直径增大,WSC处由台风眼墙转变为强对流螺旋雨带影响后其雨势增强则主要是由于雨滴数浓度增加。台风“韦帕”对流降水的质量加权平均直径均值为1.85 mm,对数标准化数浓度均值为3.95 mm-1·m-3;LSI处对流降水位于海洋性对流区域内,而WSC处则介于海洋性和大陆性对流之间。

    Abstract:

    Using the raindrop spectrum observation data from Chongzuo National Meteorological Observatory and Fangcheng National Reference Climate Station, combined with the rainfall data and radar observation data, we analyzed the structural characteristics and differences of raindrop spectrum at different precipitation stages on the inland leeward side (LSI) and near-coast windward side (WSC) during the impact of typhoon Wipha from August 2 to 3, 2019. The results show that the rainfall of typhoon Wipha is mainly contributed by medium and small raindrops; especially the contribution of medium raindrops is stable above 70%. The rainfall at LSI is dominated by stratiform clouds with relatively gentle rain intensity, while the rainfall at WSC is characterized by mixed cumulus clouds with large rain intensity and severe fluctuations. Due to the strong convective activity and upward motion, the raindrop number concentration and raindrop diameter at WSC are significantly larger than those at LSI. The main factor for the increase of rain intensity at LSI after typhoon landfall is the increase of raindrop diameter, while the increase of rain intensity at WSC after the change from typhoon eye wall to strong convective spiral rain band is mainly due to the increase of raindrop number concentration. The average mass-weighted mean diameter of the convective precipitation of typhoon Wipha is 1.85 mm and the average logarithmic normalized intercept is 3.95 mm-1·m-3. The convective precipitation at LSI is located in the maritime convective region, while at WSC it is between maritime and continental convection.

    参考文献
    相似文献
    引证文献
引用本文
分享
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:2021-07-07
  • 最后修改日期:2021-10-22
  • 录用日期:2021-11-01
  • 在线发布日期: 2021-11-17
  • 出版日期: