PENG Tingwei,ZHENG Jiafeng,TANG Xin,et al.A Study on the Characteristics of Raindrop Size Distribution in Luding Area in Summer[J].Journal of Chengdu University of Information Technology,2023,38(06):701-708.[doi:10.16836/j.cnki.jcuit.2023.06.012]
泸定地区夏季雨滴谱特征研究
- Title:
- A Study on the Characteristics of Raindrop Size Distribution in Luding Area in Summer
- 文章编号:
- 2096-1618(2023)06-0701-08
- 关键词:
- 泸定地区; 雨滴谱特征; 层状云降水; 对流云降水; Z-R关系 μ-λ关系
- Keywords:
- Luding area; characteristics of raindrop size distribution; stratiform precipitation; convective precipitation; Z-R relationship; μ-λ relationship
- 分类号:
- P468.0+24
- 文献标志码:
- A
- 摘要:
- 为进一步认识四川盆地西部山区的降水微物理特征，利用泸定地区2019年5-7月Parsivel2型激光雨滴谱仪的观测资料，研究不同强度降水和不同类型降水的雨滴谱特征及差异，提出有助于提高本地降水预报业务的雷达反射率因子、质量加权平均直径、标准化截距参数与降水强度(Z-R、Dm-R、Nw-R)关系和Gamma形状参数与斜率参数(μ-λ)关系。结果表明:随雨强逐渐增大，该地区的雨滴谱逐渐增宽，雨滴数浓度也逐渐增大，雷达反射率因子Z、液态含水量W、质量加权平均直径Dm、雨滴总数浓度NT、标准化截距参数Nw也都逐渐增大，但形状参数μ和斜率参数λ则逐渐减小。泸定地区夏季层状云降水占比大，对流云降水占比小，但对流云降水的大雨滴数浓度普遍都高于层状云降水，前者的R、W、Z、NT、Dm也都大于后者，前者平均雨滴谱更宽，但谱倾斜率更小。
- Abstract:
- To advance the understanding of microphysical characteristics of precipitation in the western mountainous area of Sichuan Basin, data of the Parsivel2 laser disdrometer from May to July 2019 observed at the Luding area is used to investigate the characteristics and differences of the raindrop size distribution(RSD). Additionally, local empirical relationships between the radar reflectivity factor Z and rain rate R, the mass-weighted mean diameter Dm and R, the generalized intercept parameter Nw and R, and Gamma shape parameter μ and slope parameter λ were proposed, which can be beneficial for improving the local operation of precipitation forecasting. The results show that as the rainfall intensity gradually increases, the RSD in this area gradually widens, the raindrop number concentration also gradually increases, and the radar reflectivity factor Z, liquid water content W, mass-weighted mean diameter Dm, total raindrop concentration NT, and generalized intercept parameter Nw also gradually increase, but the shape parameter μ and slope parameter λ gradually decrease. The concentration of large raindrops in convective precipitation is generally higher than that in stratiform precipitation, and the R, W, Z, NT, and Dm of the former are also greater than those of the latter. The average raindrop spectrum of the former is wider, but the slope of the spectrum is smaller.
参考文献/References:
[1] 房彬,郭学良,肖辉.辽宁地区不同降水云系雨滴谱参数及其特征量研究[J].大气科学,2016,40(6):1154-1164.
[2] Wu Z,Zhang Y,Zhang L,et al.Characteristics of summer season raindrop size distribution in three typical regions of western Pacific[J].Journal of Geophysical Research:Atmospheres,2019,124(7):4054-4073.
[3] 杨俊梅,陈宝君,韩永翔,等.山西省不同地区雨滴谱的统计特征[J].气象科学,2016,36(1):88-95.
[4] 柳臣中,周筠琨,谷娟,等.成都地区雨滴谱特征.应用气象学报,2015,26(1):112-121.
[5] Zhang A,Hu J,Chen S,et al.Statistical Characteristics of Raindrop Size Distribution in the Monsoon Season Observed in Southern China[J].Remote Sensing,2019,11(4):432.
[6] 苏立娟,李汉超,达布希拉图,等.呼和浩特地区降水雨滴谱特征分析[J].干旱区资源与环境, 2019(7):6.
[7] Wen L,Zhao K,Wang M,et al.Seasonal Variations of Observed Raindrop Size Distribution in East China[J].Adv Atmos Sci,2019(4):346-362.
[8] 李慧,银燕,单云鹏,等.黄山层状云和对流云降水不同高度的雨滴谱统计特征分析[J].大气科学,2018,42(2):268-280.
[9] 李山山,王晓芳,万蓉,等,青藏高原东坡不同海拔区域的雨滴谱特征[J].高原气象,2020,39(5):899-911.
[10] 金祺,袁野,刘慧娟,等.江淮之间夏季雨滴谱特征分析[J].气象学报,2015,73(4):778-788.
[11] 郑娇恒,陈宝君.雨滴谱分布函数的选择:M-P和Gamma分布的对比研究[J]. 气象科学,2007,27(1):17-25.
[12] Ulbrich CW.Natural variations in the analytical form of the rain drop size distribution[J]. Climate Appl Meteor,1983,22(10):1764-1775.
[13] Cao Q,Zhang G F.Errors in Estimating Raindrop Size Distribution Parameters Employing Disdrometer and Simulated DSD[J].Appl Meteor Climatol,2009,48(2):406-425.
[14] Testud J,Oury S,Black R A,et al,The concept of“normal-ized”distribution to describe DSD:A tool for cloud physics and cloud remote sensing[J]. Journal of Application Me-teorology,2001,40(6):1118-1140.
[15] Bringi V N,Chandrasekar V,Hubbert J,et al.Raindrop Size Distribution in Different Climatic Regimes from Disdrometer and Dual-Polarized Radar Analysis[J].Journal of the Atmospheric Sciences,2003,60(2):354-365.
[16] Chen B,Yang J,Jiangping P U.Statistical Characteristics of Raindrop Size Distribution in the Meiyu Season Observed in Eastern China[J]. Journal of the Meteorological Society of Japan,2013,91(2):215-227.
[17] 刘红燕,雷恒池.基于地面雨滴谱资料分析层状云和对流云降水的特征[J].大气科学,2006,30(4):693-702.
[18] Marshall J S,Palmer W.The Distribution of Raindrops with Size[J].J Meteor,1948,5(4):165-166.
[19] 杨俊梅,王星星,封秋娟,等.山西汾阳地区层状云和对流云降水雨滴谱特征[J].干旱气象,2017,35(3):7.
[20] Brandes E A,Zhang G,Vivekanandan J.An Evaluation of a Drop Distribution-Based Polarimetric Radar Rainfall Estimator[J].Journal of Applied Meteorology,2003,42(5):652-660.
相似文献/References:
[1]王莹珏,彭思越,张浩然,等.广东龙门地区雨滴谱特征研究[J].成都信息工程大学学报,2023,38(05):548.[doi:10.16836/j.cnki.jcuit.2023.05.009]
WANG Yingjue,PENG Siyue,ZHANG Haoran,et al.Raindrop Spectrum Characteristics in Longmen Guangdong Province[J].Journal of Chengdu University of Information Technology,2023,38(06):548.[doi:10.16836/j.cnki.jcuit.2023.05.009]
备注/Memo
收稿日期:2022-12-23
基金项目:国家自然科学基金资助项目(42205008)