伊犁河谷流域山区和平原雨滴谱特征统计研究

  • 江雨霏 ,
  • 杨莲梅 ,
  • 李建刚 ,
  • 曾勇 ,
  • 仝泽鹏 ,
  • 刘晶 ,
  • 李浩阳 ,
  • 李晓萌
展开
  • 1. 中国气象局乌鲁木齐沙漠气象研究所,新疆 乌鲁木齐 830002
    2. 新疆云降水物理与云水资源开发实验室,新疆 乌鲁木齐 830002
    3. 西天山云降水物理野外科学观测基地,新疆 乌鲁木齐 830002

江雨霏(1994 -), 女, 安徽和县人, 助理研究员, 主要从事云降水物理研究. E-mail:

收稿日期: 2023-11-07

  修回日期: 2024-01-16

  网络出版日期: 2024-01-16

基金资助

新疆维吾尔自治区自然科学基金项目(2022D01B75); 国家自然科学基金项目(U2003106); 新疆气象局科技创新发展基金项目(MS202210); “天山英才”培养计划项目(2022TSYCLJ0003); 中国气象局乌鲁木齐沙漠气象研究所科技发展基金项目(KJFZ202303)

Statistical Characteristics of Raindrop Size Distribution in the Mountainous and Plain Areas of the Ili River Valley

  • Yufei JIANG ,
  • Lianmei YANG ,
  • Jiangang LI ,
  • Yong ZENG ,
  • Zepeng TONG ,
  • Jing LIU ,
  • Haoyang LI ,
  • Xiaomeng LI
Expand
  • 1. Institute of Desert Meteorology,China Meteorological Administration,Urumqi 830002,Xinjiang,China
    2. Xinjiang Cloud Precipitation Physics and Cloud Water Resources Development Laboratory,Urumqi 830002,Xinjiang,China
    3. Field Scientific Observation Base of Cloud Precipitation Physics in West Tianshan Mountains,Urumqi 830002,Xinjiang,China

Received date: 2023-11-07

  Revised date: 2024-01-16

  Online published: 2024-01-16

摘要

雨滴谱是理解降水微物理特性和定量降水估测的基础, 尤其是在降水机制复杂、 时空变异性大的复杂地形中。本文利用Parsivel2激光雨滴谱仪对2020 -2022年夏季伊犁河谷流域山区和平原不同降水强度和不同降水类型的雨滴谱特征进行了研究。结果表明: 山区和平原降水主要以小雨滴为主, 对降水强度R贡献最大的主要是中雨滴。山区降水和平原降水主要出现在午后至傍晚, 山区降水大中型雨滴数浓度在各时间段均高于平原。随着雨强增大, 雨滴谱的谱宽和各直径档的雨滴数浓度也随之增加, 山区降水的大中型粒子数浓度在小雨和大雨时明显大于平原。在相同降水强度和降水类型的情况下, 山区降水具有较大的质量加权平均直径(Dm )和较小的标准化截断参数(log10 Nw )。此外, 伊犁河谷流域山区和平原的对流云滴谱均倾向于“大陆性对流簇”。研究发现, 两地区降水的μ-Λ关系和Z-R关系也存在显著差异, Z=300R 1.40的经验关系显然高估了降水量。研究结果揭示了伊犁河谷流域不同地形条件下的降水微物理特征, 为后续利用雷达资料反演降水提供可靠的事实依据。

本文引用格式

江雨霏 , 杨莲梅 , 李建刚 , 曾勇 , 仝泽鹏 , 刘晶 , 李浩阳 , 李晓萌 . 伊犁河谷流域山区和平原雨滴谱特征统计研究[J]. 高原气象, 2024 , 43(5) : 1271 -1285 . DOI: 10.7522/j.issn.1000-0534.2024.00004

Abstract

Raindrop size distribution (RSD) is fundamental in understanding the precipitation microphysics and quantitative precipitation estimation, especially in complex terrain with complicated rainfall mechanism and high spatial and temporal variability.In this paper, the RSD characteristics of different rainfall rates and rain types in the mountainous and plain areas of the Ili River Valley during the summer of 2020 -2022 are investigated using Parsivel2 disdrometer.The results show that the precipitation in the mountainous and plain areas is mainly composed of small raindrops, and medium raindrops are the largest contribution to the rainfall rate R.Precipitation in the mountainous and plain areas mainly occurs during the late afternoon and early evening, and the concentration of large and medium-sized raindrops is higher in the mountainous areas in all time periods.The spectral width and the concentration of drops with diameters increase with increasing rainfall rate.The number concentration of medium and large particles in the mountainous areas is obviously higher than that in the plain areas during light rain and heavy rain.For the same rainfall rate and rain type, precipitation in the mountainous areas has higher mass-weighted mean diameter (Dm ) and lower normalized intercept parameter (log10 Nw ).In addition, the convective rain spectrum in the mountainous and plain areas of the Ili River Valley tend to be “continental-like convective cluster”.It is found that there are also significant differences in the μ-Λ relationship and Z-R relationship of precipitation between the two areas, and the empirical relationship of Z =300R 1.40 clearly overestimates precipitation.The results reveal the microphysical characteristics of precipitation under different terrain conditions in the Ili River Valley, and provide a reliable factual basis for the subsequent retrieval of precipitation using radar data.

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