کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
5427604 1508637 2016 11 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Extinction of radiant energy by large atmospheric crystals with different shapes
ترجمه فارسی عنوان
انقراض انرژی تابشی توسط بلورهای جوی بزرگ با اشکال مختلف
موضوعات مرتبط
مهندسی و علوم پایه شیمی طیف سنجی
چکیده انگلیسی


- Method of physical optics is used at coherent sum of diffracted and refracted fields.
- The extinction characteristics in terms of elements of extinction matrix are obtained.
- Influence of shapes and sizes of large particles on the extinction is evaluated.
- Conditions of occurrence of extinction features are determined.

The calculated results of extinction characteristics of visible and infrared radiation for large semi-transparent crystals are obtained by hybrid technique, which is a combination of the geometric optics method and the physical optics method. Energy and polarization characteristics of the radiation extinction in terms of the elements of the extinction matrix for individual large crystals and ensemble of crystals are discussed. Influences of particle shapes, aspect ratios, parameters of size distribution, complex refractive index, orientation of crystals, wavelength, and the polarization state of an incident radiation on the extinction are illustrated. It is shown that the most expressive and stable features of energy and polarization characteristics of the extinction are observed in the midinfrared region, despite the fact that the ice particles significantly absorb the radiant energy of this spectrum. It is demonstrated that the polarized extinction characteristics can reach several tens of percent at IR wavelengths. For the large crystals, the conditions of occurrence of the spectral behavior of the extinction coefficient in the visible, near-IR, and mid-IR wavelength ranges are determined.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Quantitative Spectroscopy and Radiative Transfer - Volume 178, July 2016, Pages 350-360
نویسندگان
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