光谱学与光谱分析, 2014, 34 (3): 614, 网络出版: 2014-03-14
冰的热辐射偏振特性研究
Study on the Thermal Radiation Polarization Characteristics of Ice
摘要
冰作为全球能量平衡、 气候、 水文和生态模型中的重要参数, 直接影响到地气系统能量平衡、 天气和气候变化等, 利用热红外波段对冰偏振特性研究国内外尚未见报道, 运用热红外技术对冰热辐射偏振研究有重要意义。 研究结果表明, 波段、 探测角、 偏振角对冰热辐射偏振特性均有较大影响, 而方位角影响不显著。 振辐亮度表现为: LCH1>LCH3>LCH4>LCH2, 偏振亮温表现为TCH4>TCH1>TCH2>TCH3, 对冰热辐射偏振特性研究选择第三通道偏振亮温数据更优。 探测角对冰热辐射特性影响极其显著且受偏振角影响, 冰在探测角10°、 偏振角30°处偏振亮温最低, 这非偶然因素造成, 与冰自身特性有关, 探测角对冰偏振度影响表现为P0
Abstract
As an important parameter of the global energy balance, climate, hydrological and ecological model, ice directly affects the energy balance of the earth-atmosphere system, weather and climate. It is of great significance to use the thermal infrared polarization technology to study ice thermal radiation. For the ice monitoring and the impact of global climate change on the ice, studies on ice thermal radiation polarization characteristics were conducted based on the wavelength, detection angle and azimuth angle. The results show that the wavelength has an obvious impact on the ice thermal radiation polarization properties. The polarized radiance of four bands shows that LCH1>LCH3>LCH4>LCH2 while the polarization brightness temperature shows that TCH4>TCH1>TCH2>TCH3. It’s better to use the brightness temperature of the third channel than the radiance to study the thermal radiation polarization. The detection angle affects the ice thermal radiation polarization characteristics greatly and there are some differences between the polarization angles. The brightness temperature of ice is the lowest in the detection angle of 10° and the polarization angle of 30°, which are non-accidental factors. These was closely related to ice physical and chemical properties. The degree of ice polarization performance shows that P0
王婷婷, 赵云升, 张洪岩, 张霞, 张丽莉. 冰的热辐射偏振特性研究[J]. 光谱学与光谱分析, 2014, 34(3): 614. WANG Ting-ting, ZHAO Yun-sheng, ZHANG Hong-yan*, ZHANG Xia, ZHANG Li-li. Study on the Thermal Radiation Polarization Characteristics of Ice[J]. Spectroscopy and Spectral Analysis, 2014, 34(3): 614.