文章摘要
吴举秀1,魏鸣2,苏涛3,王学荣3,李勇3,范亚驹3.W波段和Ka波段云雷达探测回波对比分析[J].海洋气象学报,2017,37(2):57-64
W波段和Ka波段云雷达探测回波对比分析
Comparison of the echoes detected by W-band and Ka-band cloud radars
投稿时间:2017-04-20  修订日期:2017-05-15
DOI:10.19513/j.cnki.issn2096-3599.2017.02.007
中文关键词: W波段云雷达  Ka波段云雷达  探测能力  云回波  云微物理参数
英文关键词: W-band cloud radar  Ka-band cloud radar  detection capabilities  cloud echoes  microphysics parameters of clouds
基金项目:国家自然科学基金项目 (41305031);山东省气象局课题(2015sdqxm13);江苏高校优势学科建设工程资助项目(PAPD)
作者单位
吴举秀1,魏鸣2,苏涛3,王学荣3,李勇3,范亚驹3 1. 山东省气象局大气探测技术保障中心 2. 南京信息工程大学气象灾害教育部重点实验室3. 四创电子有限公司 
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中文摘要:
      通过分析W波段和Ka波段云雷达同时探测回波的差异,验证了W波段云雷达初样机的探测性能。结果表明:1)W波段云雷达初样机工作稳定,两个波段雷达都可以探测云层、云的边界、云厚等宏观参数,也可以反映出云的精细结构及云内微物理参数的变化,回波强、速度小、谱宽大的冰晶云含有上升气流及较多过冷水。2)增强模式的W波段云雷达在近地面探测雾、霾的能力比Ka波段云雷达强;两部云雷达对云层较薄的云探测能力基本相当,对多层云、云层较厚、含水量较多的云及降水的探测,由于强衰减的作用,W波段雷达所测云厚度小、云顶低、回波强度小,并且非瑞利散射也会造成W波段雷达的回波强度降低。
英文摘要:
      By analyzing the difference between the echoes detected by the W-band radar and the cloud echoes detected by Ka-band radar at the same time, the detection capabilities of the W-band radar prototype are verified. The results show that: 1) W-band radar prototype operates reliably. The macro-parameters of clouds including the layer, boundary and thicker, the fine structure of cloud and the change of the microphysics parameters of clouds can be obtained by both the two band radars. Strong echoes, small speed and broad spectrum of ice clouds reveal existence of updrafts and more supercooled water. 2) The capabilities to detect fog and haze of W-band radar with enhancement pattern in close to the ground is stronger than that of Ka-band radar. The two cloud radars have the same detection capabilities to thin clouds, but the less thicker, lower cloud top and less echo intensity for precipitation and thick clouds with more water content and multilayer clouds are measured by W-band radar because of the stronger attenuation to W-band radar, and the echo intensity of W-band radar is also reduced in the case of Rayleigh scattering.
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