Estimation of Direct Radiative Effects of Background and Smoke Aerosol in the IR Spectral Region for Siberian Summer Conditions

Nasrtdinov, I. M.; Zhuravleva, T. B.; Chesnokova, T. Yu.

doi:10.1134/s1024856018030090

Cited by 31 publications

(22 citation statements)

References 20 publications

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“…It is known that knowledge of the optical characteristics of atmospheric aerosols is needed to solve a wide range of fundamental and applied problems (see, for example, [1][2][3][4][5][6][7][8][9][10][11]). Due to the observed modern changes in the Earth's climate system, one of the most complicated problems is to assess the role of atmospheric particles in the formation of the radiation regime [3,8].…”

Section: Introductionmentioning

confidence: 99%

“…This requires detailed information about aerosol scatter and absorption properties in the optical wavelength range [9][10][11]. Obviously, it is impossible to provide the necessary accuracy when specifying the optical and microphysical characteristics of atmospheric particles in modern climate models without carrying out measurements at various spatial scales (local, regional, global).…”

Section: Introductionmentioning

confidence: 99%

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Aerosol Characteristics in the Near-Ground Layer of the Atmosphere of the City of Tomsk in Different Types of Aerosol Weather

et al. 2019

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Considering the wide range of variability of all aerosol characteristics (especially in the near-ground layer of the atmosphere near industrial centers), when creating a realistic empirical model of optical and microphysical characteristics, the optimal dividing of the total data array according to some multifactor signs is needed. In this paper, we analyze the main states of “dry” aerosol on the basis of the results of long-term regular measurements in the near-ground layer of the atmosphere near the city of Tomsk in 2000–2017. The following parameters were considered: aerosol number concentration and size distribution function, total and angular scattering coefficients, including the small-angle range 1.2° to 20°, mass concentration and size distribution of absorbing substances (equivalent black carbon), characteristics of the aerosol hygroscopic properties, and spectral aerosol extinction of radiation on an open long path in the wavelength range 0.45 to 3.9 µm. In our comprehensive study, we first proposed and developed an original approach (classification) to study the optical and microphysical properties of atmospheric aerosol of various physicochemical origins (background, smoke, smog, anthropogenic, etc.) based on dividing the entire data array into characteristic subarrays (types of aerosol weather), which differ from each other in a different combination of scattering and absorbing properties of particles. To divide the total data array into types of aerosol weather including “Background”, “Haze-S”, “Smog”, and “Smoke haze”, the values of the scattering coefficient of the dry aerosol matter σd(λ = 0.51 μm) = 100 Mm−1 and the ratio of the mass concentration of the absorbing substance to the mass concentration of submicron aerosol P = 0.05. The results showed that most of the seasonal average values of the aerosol parameters analyzed in the paper are statistically significantly different when comparing various characteristic types of scattering and absorbing atmospheric aerosol. The results of the research indicate that the application of the developed classification of types of aerosol weather for the analyzed optical and microphysical parameters of aerosol particles is quite effective and reasonable.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Aerosol Characteristics in the Near-Ground Layer of the Atmosphere of the City of Tomsk in Different Types of Aerosol Weather

et al. 2019

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“…Atmospheric hexagonal ice particles of the cirrus clouds make a significant contribution to the Earth's radiation balance and should be taken into account in global climate models [1][2][3][4][5][6][7][8] . These clouds are located at altitudes of 7-11 km, and consist of particles with sizes of 10-1000 µm [9][10][11] .…”

Section: Introductionmentioning

confidence: 99%

Light backscattering properties of atmospheric ice hexagonal particles with a distorted geometry within the physical optics approximation

Timofeev

Kustova²,

Shishko³

et al. 2022

Remote Sensing of Clouds and the Atmosphere XXVII

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The elements of light backscattering matrix for atmospheric ice hexagonal particles with distorted shapes with random spatial orientation were calculated within the physical optics approximation. Three different set of particle geometry shapes was created by distortion of a solid hexagonal column for calculation. The distortion angle for each method is 0- 50 degrees. The wavelength of the incident radiation was 1.064 μm. The backscattering cross section, the linear depolarization ratio, and the lidar ratio are presented.

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“…Atmospheric aerosol (suspended in the atmosphere solid particles of dust, ice, etc.) has a significant effect on the transfer of solar radiation in the atmosphere [1][2][3][4][5][6][7][8][9] . Interacting with aerosol particles, solar radiation is partially absorbed, but mainly scattered.…”

Section: Introductionmentioning

confidence: 99%

Light scattering database for interpretation of lidar sounding of cirrus clouds

Konoshonkin

Kustova

Shishko

et al. 2022

Remote Sensing of Clouds and the Atmosphere XXVII

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Scattering of light by ice crystals of cirrus clouds is an important problem for remote sensing of clouds and the atmosphere. Such a solution is necessary for the interpretation of data obtained by active and passive remote sensing instruments, such as lidars and photometers. Ice crystals in cirrus clouds are large non-spherical particles. To solve the problem of light scattering by large non-spherical particles, it is not possible to apply rigorous numerical methods such as FDTD, DDA, PSDT, due to their high computational complexity for large particles. This problem also cannot be solved within the framework of the classical geometrical optics approximation, since this method does not take into account such phenomena as diffraction and interference, which have a significant effect in the vicinity of the backscattering direction. This report presents the solution for the problem of light scattering by non-spherical particles with sizes from 10 to 1000 µm. The results were obtained within the framework of the physical optics approximation. The obtained database of light scattering matrices allows one to improve the accuracy of interpretation of laser sounding data of atmospheric aerosol and crystal clouds for lidars and remote sensing applications..

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Estimation of Direct Radiative Effects of Background and Smoke Aerosol in the IR Spectral Region for Siberian Summer Conditions

Cited by 31 publications

References 20 publications

Aerosol Characteristics in the Near-Ground Layer of the Atmosphere of the City of Tomsk in Different Types of Aerosol Weather

Aerosol Characteristics in the Near-Ground Layer of the Atmosphere of the City of Tomsk in Different Types of Aerosol Weather

Light backscattering properties of atmospheric ice hexagonal particles with a distorted geometry within the physical optics approximation

Light scattering database for interpretation of lidar sounding of cirrus clouds

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