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遥感技术与应用  2018, Vol. 33 Issue (6): 1063-1072    DOI: 10.11873/j.issn.1004-0323.2018.6.1063
模型与反演     
8毫米云雷达与探空观测确定云底和云顶高度的对比分析
郝倚天1,2,,陈洪滨2,3,4,毕永恒2,段树2,李军2,张金强2,3,4,宣越建2,赵宇2
(1.成都信息工程大学 电子工程学院,四川 成都 610225;
2.中国科学院大气物理研究所 中层大气和全球环境探测重点实验室,北京 100029;
3.南京信息工程大学 气象灾害预报预警与评估协同创新中心,江苏 南京 210044;
4.中国科学院大学,北京 100049)
Comparative Analysis of Cloud Boundary Observed by Millimeter Wave Cloud Radar and Radiosonde
Hao Yitian1,2,Chen Hongbin2,3,4,Bi Yongheng2,Duan Shu2,Li Jun2,Zhang Jinqiang2,3,4,Xuan Yuejian2,Zhao Yu2
(1.College of Electronic Engineering,Chengdu University of Information Technology,Chengdu  610225,China;[JP]
2.Key Laboratory of Middle Atmosphere and Global Environment Observation,Institute
of Atmospheric Physics,Chinese Academy of Sciences,Beijing 100029,China;
3.Collaborative Innovation Center on Forecast and Evaluation of Meteorological Disasters,NanjingUniversity of Information Science and Technology,Nanjing 210044,China;
4.University of Chinese Academy of Sciences,Beijing 100049,China)
 全文: PDF(9457 KB)  
摘要:

利用地基Ka波段云雷达和无线电探空仪数据进行云边界识别和对比分析研究。结果表明,8毫米波云雷达探测的云底高度比无线电探空仪观测偏低约300 m,大多数情况下二者识别的云底高度接近;而判定的云顶高度偏差较大。雷达与探空云底高度判别偏差较大时,在云下常存在大气“干层”,此时雷达探测更为灵敏;探空仪水平漂移及其湿度传感器的探测误差随高度增加是造成两者偏差的主要原因。通过计算和对比雷达反射率的时空变化率,给出了云雷达确定云底和云顶高度的一个可信度判据。

关键词: 云雷达探空仪云高度识别算法可信度    
Abstract: The observation data obtained by a Ka-band cloud radar and radiosondes during July to August 2013,in Inner Mongolia were used to detect the cloud boundary.The results show that the Cloud Base Height(CBH) determined by the cloud radar is about 300 m lower than that from the radiosonde,and the CBHs from two equipments are close in most cases;however,the heights of cloud top are largely different.The analysis of the case with larger CBH deviation indicates that the radar detection is more sensitive than the radiosonde because of the presence of an atmosphere "dry layer" under the cloud base;The main causes of the deviation are the horizontal drift of the radiosonde and the humidity sensor error that increases with increasing height.By calculating and comparing the variation rate of cloud reflectivity,a credibility criterion is given for cloud radar detection of the height of cloud base and cloud top.
Key words: Cloud radar    Radiosonde    Cloud boundary    Detection Algorithm    Credibility criterion
收稿日期: 2017-12-02 出版日期: 2019-01-29
ZTFLH:  TN959.4  
基金资助: 国家重点研发计划项目(2017YFA0603504)资助。
作者简介: 郝倚天(1993-),男,安徽铜陵人,硕士研究生,主要从事气象探测技术研究。Email:haoyitian@qq.com。
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引用本文:

郝倚天, 陈洪滨, 毕永恒, 段树, 李军, 张金强, 宣越建, 赵宇. 8毫米云雷达与探空观测确定云底和云顶高度的对比分析 [J]. 遥感技术与应用, 2018, 33(6): 1063-1072.

Hao Yitian, Chen Hongbin, Bi Yongheng, Duan Shu, Li Jun, Zhang Jinqiang, Xuan Yuejian, Zhao Yu. Comparative Analysis of Cloud Boundary Observed by Millimeter Wave Cloud Radar and Radiosonde. Remote Sensing Technology and Application, 2018, 33(6): 1063-1072.

链接本文:

http://www.rsta.ac.cn/CN/10.11873/j.issn.1004-0323.2018.6.1063        http://www.rsta.ac.cn/CN/Y2018/V33/I6/1063

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