那曲夏季云宏观特征的毫米波雷达资料研究
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作者单位:

1.成都信息工程大学,大气科学学院,四川 成都 610225;2.中国气象局交通气象重点开放实验室,江苏 南京 210008;3.中国气象科学研究院,灾害天气国家重点实验室,北京 100081;4.福建省气象局,福建省气象信息中心,福建 福州 360001

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P407.2

基金项目:

国家重点研发计划(2018YFC1505702),国家自然科学基金(41705008),江苏省气象科学研究所北极阁基金(BJG201901),成都信息工程大学人才引进项目(KYTZ201728)


Cloud macro-physical characteristics over Nagqu in summer observed by a millimeter-wave radar
Author:
Affiliation:

1.School of Atmospheric Sciences, Chengdu University of Information Technology, Chengdu 610225, China;2.Key Laboratory of Transportation Meteorology, China Meteorological Administration, Nanjing 210008, China;3.State Key Laboratory of Severe Weather, Chinese Academy of Meteorological Sciences, Beijing 100081, China;4.Fujian Meteorological Information Center, Fujian Meteorological Bureau, Fuzhou 360001, China

Fund Project:

Supported by National Key Research and Development Program of China (2018YFC1505702), National Natural Science Foundation of China (41705008), Beijige Foundation of Jiangsu Institute of Meteorological Sciences (BJG201901), and Scientific Research Foundation of Chengdu University of Information Technology (KYTZ201728).

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    摘要:

    为提高毫米波雷达对高原地区云宏观参数的观测能力,提出一种改进的反演方法,对比了该方法结果与激光云高仪(CL31)、Himawari-8卫星(HW8) 观测结果的差异,并研究了那曲夏季空中云宏观参数的垂直分布和日变化特征。结果表明,提出的方法可以改善以往云边界检测法的云层错位和距离旁瓣回波影响的不足。雷达反演的云底比CL31高、云顶比HW8高,但雷达与二者结果的垂直分布和日变化非常一致。雷达对多层云的云底探测优于CL31,对云顶反演也较HW8可靠。距离旁瓣对不同云类的宏观参数探测都有显著影响。

    Abstract:

    To improve the retrieval accuracy of cloud macro-physical parameters (cloud base height, CBH; cloud top height, CTH; cloud thickness, CTK;and cloud layer number,CLN) over the plateau area using millimeter-wave radar (MMCR) measurements, this study proposed an improved retrieval method. Differences between MMCR- and ceilometer CL31- derived CBHs, and between MMCR- and Himawari-8(HW8)- retrieved CTHs were analyzed. The vertical distribution and diurnal variation of clouds over the Nagqu of Tibetan Plateau in summer observed by these three instruments were also investigated and compared in detail. Results indicate that the presented method can avoid the influences of range sidelobe and cloud layer misclassification compared with the previous method. MMCR-derived CBHs and CTHs are both higher than the counterparts of CL31 and HW8, respectively. Whereas, their vertical distributions and diurnal variations are significantly coherent. The MMCR has a better performance on the CBH observation of multiple-layered clouds than CL31, and similarly can obtain more accuracy measurements of CTHs than HW8. The radar sidelobe echo has apparent influences on the retrievals of cloud macro-physical parameters for both different cloud types.

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郑佳锋,杨华,曾正茂,刘黎平,邹明龙,曾震瑜.那曲夏季云宏观特征的毫米波雷达资料研究[J].红外与毫米波学报,2021,40(4):471~482]. ZHENG Jia-Feng, YANG Hua, ZENG Zheng-Mao, LIU Li-Ping, ZOU Ming-Long, ZENG Zhen-Yu. Cloud macro-physical characteristics over Nagqu in summer observed by a millimeter-wave radar[J]. J. Infrared Millim. Waves,2021,40(4):471~482.]

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历史
  • 收稿日期:2020-06-27
  • 最后修改日期:2021-03-31
  • 录用日期:2020-11-02
  • 在线发布日期: 2021-07-28
  • 出版日期: