Calculation of backscattering matrix for ice particles of cirrus clouds for 1.55 and 2 micron lidars within the physical optics approximation

2020 ◽  
Author(s):  
Dmitriy N. Timofeev ◽  
Alexander V. Konoshonkin ◽  
Natalia V. Kustova ◽  
Anatoli G. Borovoi ◽  
Aleksei V. Kozodoev
Keyword(s):  
Cirrus Clouds ◽  
Physical Optics ◽  
Ice Particles ◽  
Physical Optics Approximation

Light scattering by ice crystals of cirrus clouds: From exact numerical methods to physical-optics approximation

2017 ◽  
Vol 195 ◽  
pp. 132-140 ◽  
Author(s):  
Alexander Konoshonkin ◽  
Anatoli Borovoi ◽  
Natalia Kustova ◽  
Hajime Okamoto ◽  
Hiroshi Ishimoto ◽  
...  
Keyword(s):  
Light Scattering ◽  
Numerical Methods ◽  
Cirrus Clouds ◽  
Ice Crystals ◽  
Physical Optics ◽  
Physical Optics Approximation

Calculation of cirrus clouds backscattering for lidar studies within the physical optics approximation

2018 ◽  
Author(s):  
Alexander V. Konoshonkin ◽  
Natalia Kustova ◽  
Anatoli Borovoi ◽  
Victor Shishko ◽  
Dmitriy Timofeev
Keyword(s):  
Cirrus Clouds ◽  
Physical Optics ◽  
Physical Optics Approximation

scholarly journals Retrieving microphysics of cirrus clouds from data measured with raman lidar ramses and a tilted ceilometer

2018 ◽  
Vol 176 ◽  
pp. 08002
Author(s):  
Anatoli Borovoi ◽  
Jens Reichardt ◽  
Ulrich Görsdorf ◽  
Veronika Wolf ◽  
Alexander Konoshonkin ◽  
...  
Keyword(s):  
Cirrus Clouds ◽  
Ice Crystals ◽  
Physical Optics ◽  
Data Archive ◽  
Raman Lidar ◽  
Different Shapes ◽  
Physical Optics Approximation

To develop a microphysical model of cirrus clouds, data obtained by Raman lidar RAMSES and a tilted ceilometer are studied synergistically. The measurements are interpreted by use of a data archive containing the backscattering matrixes as well as the depolarization, color and lidar ratios of ice crystals of different shapes, sizes and spatial orientations calculated within the physical-optics approximation.

scholarly journals Light Backscattering by Ice Crystals of Cirrus Clouds Within the Physical Optics Approximation

2020 ◽  
Vol 237 ◽  
pp. 08011
Author(s):  
Alexander Konoshonkin ◽  
Anatoli Borovoi ◽  
Natalia Kustova ◽  
Zhenzhu Wang ◽  
Dong Liu ◽  
...  
Keyword(s):  
Light Scattering ◽  
Spatial Orientation ◽  
Scattering Problem ◽  
Cirrus Clouds ◽  
Ice Crystals ◽  
Physical Optics ◽  
Nonspherical Particles ◽  
Physical Optics Approximation ◽  
Computer Resources

Lidar technologies are widely used for retrieving microphysics of cirrus clouds, i.e. sizes, shapes and spatial orientation of ice crystals constituting the clouds. Interpretation of the lidar signals are based on the backscattered light. However, properties of the light backscattered by the ice crystals have not been well known and understood yet. The reason of this is that the problem of light scattering by the ice crystals much larger that incident wavelengths has not been solved satisfactorily yet because of great demands to computer resources. In this contribution we review the physical optics approximation as a prospective method to solve the light scattering problem on large nonspherical particles in lidar application.

Comparison between the physical-optics approximation and exact methods solving the problem of light scattering by ice crystals of cirrus clouds

2016 ◽  
Author(s):  
Alexander V. Konoshonkin ◽  
Natalia V. Kustova ◽  
Anatoli G. Borovoi ◽  
H. Okamoto ◽  
K. Sato ◽  
...  
Keyword(s):  
Light Scattering ◽  
Cirrus Clouds ◽  
Ice Crystals ◽  
Physical Optics ◽  
Exact Methods ◽  
Physical Optics Approximation

scholarly journals Cirrus, contrails, and ice supersaturated regions in high pressure systems at northern mid latitudes

2007 ◽  
Vol 7 (5) ◽  
pp. 13175-13201 ◽  
Author(s):  
F. Immler ◽  
R. Treffeisen ◽  
D. Engelbart ◽  
K. Krüger ◽  
O. Schrems
Keyword(s):  
High Pressure ◽  
Optical Depth ◽  
Meteorological Data ◽  
Large Fraction ◽  
Close Correlation ◽  
Cirrus Clouds ◽  
Radiosonde Data ◽  
Medium Range Weather Forecast ◽  
Ice Particles ◽  
Lidar Observations

Abstract. During the European heat wave summer 2003 with predominant high pressure conditions we performed a detailed study of upper tropospheric humidity and ice particles which yielded striking results concerning the occurrence of ice supersaturated regions (ISSR), cirrus, and contrails. Our study is based on lidar observations and meteorological data obtained at Lindenberg/Germany (52.2° N, 14.1° E) as well as the analysis of the European centre for medium range weather forecast (ECMWF). Cirrus clouds were detected in 55% of the lidar profiles and a large fraction of them were subvisible (optical depth <0.03). Thin ice clouds were particularly ubiquitous in high pressure systems. The radiosonde data showed that the upper troposphere was very often supersaturated with respect to ice. Relating the radiosonde profiles to concurrent lidar observations reveals that the ISSRs almost always contained ice particles. Persistent contrails observed with a camera were frequently embedded in these thin or subvisible cirrus clouds. The ECMWF cloud parametrisation reproduces the observed cirrus clouds consistently and a close correlation between the ice water path in the model and the measured optical depth of cirrus is demonstrated.

Sign in / Sign up

Export Citation Format

Share Document