• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Radio Science >First simultaneous measurement of vertical air velocity, particle fall velocity, and hydrometeor sphericity in stratiform precipitation: Results from 47 MHz wind-profiling radar and 532 nm polarization lidar observations
【24h】

First simultaneous measurement of vertical air velocity, particle fall velocity, and hydrometeor sphericity in stratiform precipitation: Results from 47 MHz wind-profiling radar and 532 nm polarization lidar observations

机译：首次同时测量层状降水中的垂直空气速度，粒子坠落速度和水凝球的球形度：47 MHz的风廓线雷达和532 nm的偏振激光雷达观测结果

获取原文
获取原文并翻译 | 示例
       
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Results from simultaneous measurements of vertical air velocity (W), particle fall velocity, and hydrometeor sphericity in stratiform precipitation are reported for the first time. Cases of stratiform precipitation on 8 (case A) and 16 December 2008 (case B) observed at Sumatra, Indonesia (0.2°S, 100.32°E), are described. A 47 MHz wind-profiling radar measured W and reflectivity-weighted particle fall velocity relative to the air (VZ) simultaneously. Upward W above ∼6.0 km altitude in case B (>0.2 m s) was greater than in case A (<0.1 m s). VZ at 300 m above the 0°C altitude in case B (1.8 m s) was greater than in case A (1.3 m s). The thickness of melting layer (ML) in case B (900 m) was greater than in case A (300 m). Because the large-sized aggregates contribute to produce greater VZ and thicker ML, it is likely that entangled growth of dendritic crystals under the presence of significant upward W and enhanced aggregation occurrence by the well-developed dendritic crystals produced the large-sized aggregates. Lidar measured an increase of linear depolarization ratio (δ) and lidar dark band in the ML. Volume δ of raindrops was 0.08–0.10 in case B and close to zero in case A. Stronger multiple scattering in case B is likely a cause that produced the greater δ. In case B, a dip of δ was measured at the bottom of ML. The decrease of hydrometeor nonsphericity at the final stage of melting explains the dip.
机译：首次报告了同时测量垂直气流速度（W），颗粒下落速度和层状降水中水流星度的结果。描述了在印度尼西亚苏门答腊（0.2°S，100.32°E）观察到的8月（案例A）和2008年12月16日（案例B）的层状降水案例。一台47 MHz的风廓线雷达同时测量了W和相对于空气（VZ）的反射率加权粒子下降速度。在情况B（> 0.2 m s）中，海拔高于〜6.0 km的向上W大于情况A（<0.1 m s）。情况B（1.8 m s）高于0°C高度300 m时的VZ大于情况A（1.3 m s）。情况B（900 m）的熔化层（ML）的厚度大于情况A（300 m）的熔化层的厚度。因为大型聚集体有助于产生更大的VZ和更厚的ML，所以在显着向上的W的存在下，树枝状晶体的纠缠生长很可能，而发达的树枝状晶体增强的聚集发生则产生了大型聚集体。激光雷达测量了ML中线性去极化率（δ）和激光雷达暗带的增加。在情况B中，雨滴的体积δ为0.08-0.10，在情况A中接近零。在情况B中，较强的多次散射很可能是产生较大δ的原因。在情况B中，在ML的底部测量了δ的下降。融化最后阶段水凝液非球形性的降低解释了下降。

著录项

  • 来源
    《Radio Science》 |2012年第3期|1-14|共14页
  • 作者

    Tomoaki Mega; Masayuki K. Yamamoto; Makoto Abo; Yasukuni Shibata; Hiroyuki Hashiguchi; Noriyuki Nishi; Toyoshi Shimomai; Yoshiaki Shibagaki; Mamoru Yamamoto; Manabu D. Yamanaka; Shoichiro Fukao; Timbul Manik;

  • 作者单位

    Research Institute for Sustainable Humanosphere, Kyoto University, Kyoto, Japan.;

    Research Institute for Sustainable Humanosphere, Kyoto University, Kyoto, Japan.;

    Faculty of System Design, Tokyo Metropolitan University, Tokyo, Japan.;

    Faculty of System Design, Tokyo Metropolitan University, Tokyo, Japan.;

    Research Institute for Sustainable Humanosphere, Kyoto University, Kyoto, Japan.;

    Graduate School of Science, Kyoto University, Kyoto, Japan.;

    Interdisciplinary Faculty of Science and Engineering, Shimane University, Matsue, Japan.;

    Faculty of Information and Communication Engineering, Osaka Electro-Communication University, Neyagawa, Japan.;

    Research Institute for Sustainable Humanosphere, Kyoto University, Kyoto, Japan.;

    Japan Agency for Marine-Earth Science and Technology, Yokosuka, Japan., SATREPS-MCCOE Promotion Office, NEONET, BPP Teknologi, Jakarta, Indonesia., Graduate School of Science, Kobe University, Kobe, Japan.;

    Research Institute for Sustainable Humanosphere, Kyoto University, Kyoto, Japan.;

    National Institute of Aeronautics and Space (LAPAN), Bandung, Indonesia.;

  • 收录信息
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Atmospheric measurements; Laser radar; Radar measurements; Velocity measurement; Particle measurements; Ear;

    机译：大气测量;激光雷达;雷达测量;速度测量;颗粒测量;耳朵;
  • 入库时间 2022-08-18 00:01:00

相似文献

  • 外文文献
  • 中文文献
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号