Scattering and absorption characteristics of non-spherical cirrus cloud ice crystal particles in terahertz frequency band

doi:10.1088/1674-1056/ab84d3

中国物理B ›› 2020, Vol. 29 ›› Issue (7): 74102-074102.doi: 10.1088/1674-1056/ab84d3

所属专题： SPECIAL TOPIC —Terahertz physics

Scattering and absorption characteristics of non-spherical cirrus cloud ice crystal particles in terahertz frequency band

Tao Xie(谢涛), Meng-Ting Chen(陈梦婷), Jian Chen(陈健), Feng Lu(陆风), Da-Wei An(安大伟)

1 School of Remote Sensing and Geomatics Engineering, Nanjing University of Information Science and Technology, Nanjing 210044, China;
2 School of Electronic and Information Engineering, Nanjing University of Information Science and Technology, Nanjing 210044, China;
3 National Satellite Meteorological Centre, China Meteorological Administration, Beijing 100081, China

收稿日期:2020-01-22 修回日期:2020-03-02 出版日期:2020-07-05 发布日期:2020-07-05
通讯作者: Jian Chen, Feng Lu E-mail:chjnjnu@163.com;lufeng@cma.gov.cn
基金资助:
Project supported by the National Natural Science Foundation of China (Grant Nos. 61527805 and 41776181).

Scattering and absorption characteristics of non-spherical cirrus cloud ice crystal particles in terahertz frequency band

Tao Xie(谢涛)¹, Meng-Ting Chen(陈梦婷)², Jian Chen(陈健)¹, Feng Lu(陆风)³, Da-Wei An(安大伟)³

1 School of Remote Sensing and Geomatics Engineering, Nanjing University of Information Science and Technology, Nanjing 210044, China;
2 School of Electronic and Information Engineering, Nanjing University of Information Science and Technology, Nanjing 210044, China;
3 National Satellite Meteorological Centre, China Meteorological Administration, Beijing 100081, China

Received:2020-01-22 Revised:2020-03-02 Online:2020-07-05 Published:2020-07-05
Contact: Jian Chen, Feng Lu E-mail:chjnjnu@163.com;lufeng@cma.gov.cn
Supported by:
Project supported by the National Natural Science Foundation of China (Grant Nos. 61527805 and 41776181).

摘要/Abstract

摘要： We used discrete dipole approximation (DDA) to examine the scattering and absorption characteristics of spherical ice crystal particles. On this basis, we studied the scattering characteristics of spherical ice crystal particles at different frequencies and non-spherical ice crystal particles with different shapes, aspect ratios, and spatial orientations. The results indicate that the DDA and Mie methods yield almost the same results for spherical ice crystal particles, illustrating the superior calculation accuracy of the DDA method. Compared with the millimeter wave band, the terahertz band particles have richer scattering characteristics and can detect ice crystal particles more easily. Different frequencies, shapes, aspect ratios, and spatial orientations have specific effects on the scattering and absorption characteristics of ice crystal particles. The results provide an important theoretical basis for the design of terahertz cloud radars and related cirrus detection methods.

关键词: scattering characteristics, discrete dipole approximation, terahertz, non-spherical ice crystal particles

Abstract: We used discrete dipole approximation (DDA) to examine the scattering and absorption characteristics of spherical ice crystal particles. On this basis, we studied the scattering characteristics of spherical ice crystal particles at different frequencies and non-spherical ice crystal particles with different shapes, aspect ratios, and spatial orientations. The results indicate that the DDA and Mie methods yield almost the same results for spherical ice crystal particles, illustrating the superior calculation accuracy of the DDA method. Compared with the millimeter wave band, the terahertz band particles have richer scattering characteristics and can detect ice crystal particles more easily. Different frequencies, shapes, aspect ratios, and spatial orientations have specific effects on the scattering and absorption characteristics of ice crystal particles. The results provide an important theoretical basis for the design of terahertz cloud radars and related cirrus detection methods.

Key words: scattering characteristics, discrete dipole approximation, terahertz, non-spherical ice crystal particles

中图分类号: (Electromagnetic wave propagation; radiowave propagation)

41.20.Jb

92.60.Mt (Particles and aerosols) 92.60.Ta (Electromagnetic wave propagation) 92.70.Cp (Atmosphere)

谢涛, 陈梦婷, 陈健, 陆风, 安大伟. Scattering and absorption characteristics of non-spherical cirrus cloud ice crystal particles in terahertz frequency band[J]. 中国物理B, 2020, 29(7): 74102-074102.

Tao Xie(谢涛), Meng-Ting Chen(陈梦婷), Jian Chen(陈健), Feng Lu(陆风), Da-Wei An(安大伟). Scattering and absorption characteristics of non-spherical cirrus cloud ice crystal particles in terahertz frequency band[J]. Chin. Phys. B, 2020, 29(7): 74102-074102.

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Scattering and absorption characteristics of non-spherical cirrus cloud ice crystal particles in terahertz frequency band

Scattering and absorption characteristics of non-spherical cirrus cloud ice crystal particles in terahertz frequency band

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