CAJ | 학술논문

为了研究降雪过程中粒子微物理特征，利用架设在济南南部山区的一台THIES激光降水粒子谱仪获取的2009年11月11-12日强降雪过程中降水粒子谱资料，对降雪粒子微物理参量演变特征、粒子谱及速度谱分布特征进行了分析。结果表明，（1）此次降雪天气过程中降水强度与数浓度、最大直径和雷达反射率因子间均具有一定的正相关性；降水强度与最大直径的关系极为密切，粒子的大小直接决定降水强度的大小。（2）降雪过程中谱型分布以单峰型和指数型为主，各粒径档内数浓度分布存在不均匀性，但数浓度峰值直径主要集中在0．5 mm处。（3）粒子速度谱均以单峰结构分布，下落末速基本位于0．375～2 m·s-1之间，随直径的增大几乎没有变化。
위료연구강설과정중입자미물리특정，이용가설재제남남부산구적일태THIES격광강수입자보의획취적2009년11월11-12일강강설과정중강수입자보자료，대강설입자미물리삼량연변특정、입자보급속도보분포특정진행료분석。결과표명，（1）차차강설천기과정중강수강도여수농도、최대직경화뢰체반사솔인자간균구유일정적정상관성；강수강도여최대직경적관계겁위밀절，입자적대소직접결정강수강도적대소。（2）강설과정중보형분포이단봉형화지수형위주，각립경당내수농도분포존재불균균성，단수농도봉치직경주요집중재0．5 mm처。（3）입자속도보균이단봉결구분포，하락말속기본위우0．375～2 m·s-1지간，수직경적증대궤호몰유변화。
To better study microphysical characteristics during snowfall process,drop size spectra were col-lected with an optical disdrometer during the snowstorm event in 11-12 November 2009 in the southern mountainous area of Jinan.The characteristics of the microphysical parameters,the drop size distribution and speed spectral distribution are investigated.It is found that:(1 )during the snowstorm,precipitation intensity and number concentration,maximum diameter,and the radar reflectivity factor have positive lin-ear correlations;the precipitation intensity and the maximum diameter has a close relationship;precipitati-on intensity is decided by the maximum diameter.(2)In the snow process,the spectrum-type distributions are of unimodal and index distributions,and the peak value of number concentration is focuses around 0.5 mm.The concentration distribution of each particle-size file is inhomogeneous.(3 )The velocity-spectra are mainly single-peak distributions,and the terminal velocity essentially lies in the range of 0.375-2 m·s-1 ,which almost has no change with the increase of diameter.