[1]陈星登,郭泽勇,张弘豪,等.不同强度云系的双偏振雷达特征[J].气象研究与应用,2021,42(02):19-23.[doi:10.19849/j.cnki.CN45-1356/P.2021.2.04]
　Chen Xingdeng,Guo Zeyong,Zhang Honghao,et al.Dual polarization radar characteristics of clouds with different intensities[J].Journal of Meteorological Research and Application,2021,42(02):19-23.[doi:10.19849/j.cnki.CN45-1356/P.2021.2.04]
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不同强度云系的双偏振雷达特征()
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气象研究与应用[ISSN:1673-8411/CN:45-1356/P]

卷:
第42卷
期数:
2021年02期
页码:
19-23
栏目:
研究论文
出版日期:
2021-07-06

文章信息/Info

Title:
Dual polarization radar characteristics of clouds with different intensities
作者:
陈星登1;  郭泽勇2;  张弘豪2;  陈时东3;  殷宏南2
1. 阳江市海陵试验区气象局, 广东 阳江 529500;
2. 阳江市气象局, 广东 阳江 529500;
3. 阳春市气象局, 广东 阳春 529600
Author(s):
Chen Xingdeng1;  Guo Zeyong2;  Zhang Honghao2;  Chen Shidong3;  Yin Hongnan2
1. Meteorological Bureau of Hailing Experimental Zone, Yangjiang Guangdong, 529500;
2. Yangjiang Meteorological Bureau, Yangjiang Guangdong 529500;
3. Yangchun Meteorological Bureau, Yangchun Guangdong 529600
关键词:
双偏振雷达; 层状云; 非降雹对流云; 冰雹云; 信噪比
Keywords:
dual polarization radar; stratiform cloud; non-hail convective cloud; hail cloud; signal to noise ratio
分类号:
P415.2
DOI:
10.19849/j.cnki.CN45-1356/P.2021.2.04
摘要:
利用S波段双偏振雷达观测到的层状云、非降雹对流云以及冰雹云三种不同强度云系的雷达数据，对其双偏振参量的特征差异进行分析。结果表明，层状云的差分反射率ZDR、差分相移率KDP接近0值，差分相移ΦDP随径向距离廓线变化小，与初始相位保持一致；在非降雹对流云中，CC值基本稳定在0.95以上，回波强度大于35dBZ时，ZDR、KDP和ΦDP均显著递增，KDP和ΦDP变化尤为明显，其表现出对强降水的敏感特征；冰雹云的双偏振特征整体与非降雹对流云一致，但在冰雹区域内反射率ZH大于62dBZ时，ZDR 迅速降低至0附近，少数冰雹区域对应KDP为空值（显示背景色）KDP原始算法存在明显缺陷，应当加以其他条件（如信噪比）作为约束。
Abstract:
Based on the radar data of stratiform clouds, non-hail convective clouds and hail clouds with different intensities observed by S-band dual polarization radar, the characteristic differences of dual polarization parameters were analyzed. The results showed that the difference reflectivity ZDR and the difference phase shift rate KDP of stratiform clouds were close to zero. The difference phase shift ΦDP changed little with the radial distance profile and was consistent with the initial phase. In the non-hail convective clouds, the CC value was basically stable above 0.95. When the echo intensity was greater than 35dBZ, ZDR, KDP and ΦDP increased significantly; the variation of KDP and ΦDP was especially obvious, which was sensitive to heavy rainfall. The dual polarization characteristic of hail clouds was consistent with that of non-hail convective clouds. However, when the reflectivity ZH was greater than 62dbz in hail region, ZDR decreased rapidly to near zero. The KDP corresponding to a few hail regions was null(displaying background color). The original KDP algorithm has obvious defects, and other conditions (such as signal-to-noise ratio) should be taken as constraints.

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备注/Memo

备注/Memo:
收稿日期:2021-02-19。
基金项目:广东省重点领域研发计划（2020B0101130021）、灾害天气国家重点实验室开放基金（2020LASW-B04）及南海气象防灾减灾重点实验室开放基金重点项目（SCSF201904）
作者简介:陈星登(1985-),男,硕士,工程师,从事天气雷达观测及应用。E-mail:522848878@qq.com
通讯作者:郭泽勇(1982-)男,硕士,高级工程师,从事天气雷达观测及应用。E-mail:guozeyong@126.com
更新日期/Last Update: 1900-01-01