Zobrazeno 1 - 10
of 68
pro vyhledávání: '"Kultegin Aydin"'
Publikováno v:
Journal of the Atmospheric Sciences. 76:1903-1916
Testing the often-made assumption that ice particle aggregates (snowflakes) are well represented by oblate spheroids, ellipsoid fits are applied to aggregate images. An algorithm to retrieve both the ellipsoidal parameters and the orientations of the
Publikováno v:
IEEE Transactions on Geoscience and Remote Sensing. 56:681-693
A technique using satellite-link signal attenuation measurements for estimating rainfall accumulation along the link path is evaluated. Power law relationships between attenuation rate $A$ and rainfall rate $R$ are used to estimate $R$ and rainfall a
Autor:
Giovanni Botta, Johannes Verlinde, Kultegin Aydin, Eugene E. Clothiaux, Mariko Oue, Zhiyuan Jiang, Yinghui Lu
Publikováno v:
Journal of Applied Meteorology and Climatology. 56:725-734
A simple numerical experiment was performed to investigate the result published in many papers that measurements indicate that aggregates may be well represented as oblate spheroids with mean aspect ratio (semiminor axis to semimajor axis length) of
Autor:
Zhiyuan Jiang, Kultegin Aydin, Eugene E. Clothiaux, Johannes Verlinde, Giovanni Botta, Yinghui Lu
Publikováno v:
Atmospheric Measurement Techniques, Vol 9, Iss 10, Pp 5119-5134 (2016)
The atmospheric science community has entered a period in which electromagnetic scattering properties at microwave frequencies of realistically constructed ice particles are necessary for making progress on a number of fronts. One front includes retr
Autor:
Mariko Oue, Eugene E. Clothiaux, Matthew R. Kumjian, Zhiyuan Jiang, Kultegin Aydin, Johannes Verlinde, Yinghui Lu
Publikováno v:
Journal of Applied Meteorology and Climatology. 54:1335-1351
Characteristics of graupel in an Arctic deep mixed-phase cloud on 7 December 2013 were identified with observations from an X-band scanning polarimetric radar and a Ka-band zenith-pointing radar in conjunction with scattering calculations. The cloud
Autor:
Johannes Verlinde, Mariko Oue, Matthew R. Kumjian, Kultegin Aydin, Yinghui Lu, Eugene E. Clothiaux
Publikováno v:
Journal of Applied Meteorology and Climatology. 54:1060-1068
This study demonstrates that linear depolarization ratio (LDR) values obtained from zenith-pointing Ka-band radar Doppler velocity spectra are sufficient for detecting columnar ice crystals. During a deep precipitating system over the Arctic on 7 Dec
Publikováno v:
Journal of Applied Meteorology and Climatology. 54:596-604
Scattering properties of a large collection of pristine ice crystals at millimeter and centimeter wavelengths are calculated using the generalized multiparticle Mie method. Millimeter- and centimeter-wavelength radar observables are also calculated b
Publikováno v:
Journal of Geophysical Research: Atmospheres. 119:10471-10484
A modification to the Rayleigh-Gans approximation is made that includes self-interactions between different parts of an ice crystal, which both improves the accuracy of the Rayleigh-Gans approximation and extends its applicability to polarization-dep
Publikováno v:
Journal of Quantitative Spectroscopy and Radiative Transfer. 135:1-8
Ice crystal scattering properties at microwave radar wavelengths can be modeled with the Generalized Multi-particle Mie (GMM) method by decomposing an ice crystal into a cluster of tiny spheres composed of solid ice. In this decomposition the mass di
Publikováno v:
Journal of Quantitative Spectroscopy and Radiative Transfer. 131:95-104
Using the Generalized Multi-particle Mie-method (GMM), Botta et al. (in this issue) [7] created a database of backscattering cross sections for 412 different ice crystal dendrites at X-, Ka- and W-band wavelengths for different incident angles. The R