Atmospheric and Oceanic Optics最新文献_第2页

Long-Term Studies of the Chemical Composition of Atmospheric Aerosol at Russian EANET Stations 俄罗斯EANET站大气气溶胶化学成分的长期研究

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Atmospheric and Oceanic Optics Pub Date : 2025-10-08 DOI: 10.1134/S1024856025700381

L. P. Golobokova, T. V. Khodzher, S. A. Gromov, O. I. Berdashkinova, V. A. Obolkin, N. A. Onishchuk, V. L. Potemkin

{"title":"Long-Term Studies of the Chemical Composition of Atmospheric Aerosol at Russian EANET Stations","authors":"L. P. Golobokova, T. V. Khodzher, S. A. Gromov, O. I. Berdashkinova, V. A. Obolkin, N. A. Onishchuk, V. L. Potemkin","doi":"10.1134/S1024856025700381","DOIUrl":"10.1134/S1024856025700381","url":null,"abstract":"The Russian Federation regularly participates in the international program of the Acid Deposition Monitoring Network in East Asia (EANET). Two regions in the Asian Russia were selected for monitoring research: South-Eastern Siberia (three sites) and Far East (one site). A database on the chemical composition of atmospheric aerosol has been compiled over the operation period. The spatial and temporal variability of the ion composition of aerosol over five-year periods from 2001 to 2024 was studied using the ratio of the summed concentrations of the main ions. Based on data from other projects, some relevant trace elements in atmospheric aerosol were analyzed: Li, Al, Ti, V, Mn, Fe, Sr, Th, U, Ba, and Co (of terrigenous origin) and Cr, Cu, and Ni (of nonterrigenous origin). Their contribution to the total level of atmospheric air pollution at the EANET monitoring sites was assessed. The monitoring results on atmospheric depositions can be used for practical assessment of the environmental conditions, scientific research, and public information.","PeriodicalId":46751,"journal":{"name":"Atmospheric and Oceanic Optics","volume":"38 5","pages":"514 - 523"},"PeriodicalIF":0.9,"publicationDate":"2025-10-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145242637","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

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Thermophoresis of Fractal-like Aggregates: Theory and Experiment 分形聚集体的热电泳：理论与实验

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Atmospheric and Oceanic Optics Pub Date : 2025-10-08 DOI: 10.1134/S102485602570040X

S. A. Beresnev, L. B. Kochneva, M. S. Vasileva

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Aerosol Optical Depth of the Atmosphere near TAIGA Gamma-ray Observatory According to GEOS-CHEM Chemical Model and CAMS Chemical Reanalysis 基于GEOS-CHEM化学模型和CAMS化学再分析的TAIGA伽玛射线天文台附近大气气溶胶光学深度

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Atmospheric and Oceanic Optics Pub Date : 2025-10-08 DOI: 10.1134/S1024856025700460

E. Yu. Mordvin, A. I. Revyakin, A. A. Lagutin

{"title":"Aerosol Optical Depth of the Atmosphere near TAIGA Gamma-ray Observatory According to GEOS-CHEM Chemical Model and CAMS Chemical Reanalysis","authors":"E. Yu. Mordvin, A. I. Revyakin, A. A. Lagutin","doi":"10.1134/S1024856025700460","DOIUrl":"10.1134/S1024856025700460","url":null,"abstract":"Atmospheric aerosol affects astronomical observations in the visible spectral region (400−700 nm). Therefore, information on the dynamics of optical properties of the atmosphere in the region of an astrophysical experiment is required for correct interpretation of experimental results. In the lack of local measurements, data on the state of the atmosphere can be derived, for example, from numerical simulation. The paper discusses the simulation results for AOD in the region of TAIGA gamma-ray observatory, where EAS Cherenkov radiation is recorded at night, with the use of GEOS-CHEM chemical transport model and CAMS chemical reanalysis. According to GEOS-CHEM and CAMS data, the average AODs (at a wavelength of 550 nm) over September–April in 2019–2022 were ∼0.08 and ∼0.05, respectively. The AOD maximum is observed in April and can attain 0.6. Verification of the simulation results with AERONET data shows their satisfactory agreement: the correlation coefficient is 0.92 for GEOS-CHEM and 0.91 for CAMS. Hence, the results of GEOS-CHEM and CAMS can be used for processing data from TAIGA gamma-ray observatory, as well as from similar astrophysical projects.","PeriodicalId":46751,"journal":{"name":"Atmospheric and Oceanic Optics","volume":"38 5","pages":"584 - 590"},"PeriodicalIF":0.9,"publicationDate":"2025-10-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145242639","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

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Aerosol Microstructure and Hygroscopic and Absorption Properties in the Atmosphere of Lake Baikal and Its Southern Coastal Territory in Summer 2024 2024年夏季贝加尔湖及南岸地区大气气溶胶微观结构及吸湿吸收特性

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Atmospheric and Oceanic Optics Pub Date : 2025-10-08 DOI: 10.1134/S1024856025700423

V. V. Pol’kin, S. A. Terpugova, E. P. Yausheva, V. P. Shmargunov, T. V. Khodzher, G. S. Zhamsueva

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Regional Variability of Lightning Activity in Pakistan: The Role of Atmospheric and Cloud Properties 巴基斯坦闪电活动的区域变率：大气和云特性的作用

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Atmospheric and Oceanic Optics Pub Date : 2025-10-08 DOI: 10.1134/S1024856025700514

Rajesh Gogineni, Nandivada Umakanth, Nallagonda Vijaya Ratnam, Yarlagadda RamaKrishna, Kondaveeti SivaKrishna, Myla Chimpiri Rao

{"title":"Regional Variability of Lightning Activity in Pakistan: The Role of Atmospheric and Cloud Properties","authors":"Rajesh Gogineni, Nandivada Umakanth, Nallagonda Vijaya Ratnam, Yarlagadda RamaKrishna, Kondaveeti SivaKrishna, Myla Chimpiri Rao","doi":"10.1134/S1024856025700514","DOIUrl":"10.1134/S1024856025700514","url":null,"abstract":"This study examines the meteorological variables influencing lightning activity over Pakistan from 2001 to 2014 focusing on three regions: R1 (26°–29° N, 64°–69° E), R2 (29°–32° N, 69°–73° E), and R3 (32°–36° N, 70°–73° E). To understand regional variations, we analyzed several meteorological parameters, including aerosol optical depth (AOD), relative humidity (RH), convective available potential energy (CAPE), precipitation (P), liquid water cloud effective radius (LWCER), ice water content (IWC), and liquid water content (LWC) during lightning days. Our findings indicate that lightning activity is correlated with the vertical extent (or thickness) of the mixed-phase zone defined as the layer between 0°C and −40°C isotherms and associated ice and liquid water content. In the lower atmosphere, increased rainfall is associated with higher LWC, whereas in the mixed-phase zone, lightning activity shows a stronger dependence on both IWC and the vertical structure of the mixed-phase cloud layer. Lightning activity exhibits a strong relationship with relative humidity. An inverse correlation between AOD and lightning suggests that aerosols can modulate lightning activity by influencing cloud microphysics, particularly under thermodynamically favorable conditions. These insights underscore the importance of continuous lightning monitoring in Pakistan. A better understanding of these meteorological influences can enhance lightning prediction and improve safety measures in the region.","PeriodicalId":46751,"journal":{"name":"Atmospheric and Oceanic Optics","volume":"38 5","pages":"591 - 600"},"PeriodicalIF":0.9,"publicationDate":"2025-10-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145242695","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

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The Hypothesis of Transient Luminous Events in the Mesosphere of Venus 金星中间层瞬变发光事件的假说

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Atmospheric and Oceanic Optics Pub Date : 2025-10-08 DOI: 10.1134/S1024856025700435

E. A. Sosnin, V. A. Panarin, V. S. Skakun, D. A. Sorokin

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Recognition of Opposite-in-sign Orbital Angular Momenta of Laser Beams in a Turbulent Atmosphere with Neural Networks 湍流大气中激光束反符号轨道角动量的神经网络识别

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Atmospheric and Oceanic Optics Pub Date : 2025-09-04 DOI: 10.1134/S1024856025700216

E. A. Bogach, E. V. Adamov, V. V. Dudorov, V. V. Kolosov

{"title":"Recognition of Opposite-in-sign Orbital Angular Momenta of Laser Beams in a Turbulent Atmosphere with Neural Networks","authors":"E. A. Bogach, E. V. Adamov, V. V. Dudorov, V. V. Kolosov","doi":"10.1134/S1024856025700216","DOIUrl":"10.1134/S1024856025700216","url":null,"abstract":"An approach to increasing the communication channel capacity by amplitude and phase modulation almost reaches its limits. An increase in the information capacity of data communication channels by using the orbital angular momentum (OAM) of laser beams for information encoding is currently an urgent problem. The use of this approach in atmospheric optical communication systems is limited by the distorting effect of atmospheric turbulence, which makes decoding difficult and reduces the data transfer rate. In addition, the intensity distributions of vortex beams with OAMs opposite in sign are identical in a homogeneous medium, which also limits the use of OAM sign for encoding information. This work analyzes fundamental possibility of neural networks for recognizing opposite in sign OAMs of vortex beams in a turbulent atmosphere only by intensity distributions. The study is based on numerical simulation of Laguerre-Gaussian beam propagation in a turbulent atmosphere and use of the derived intensity distributions for training and testing neural networks. It is been shown for the first time that neural networks enables recognizing opposite in sign OAMs of Laguerre-Gaussian beams propagation through a turbulent atmosphere by intensity distributions with an accuracy of more than 90%. The results can be useful for developers and researchers of atmospheric optical communication systems where OAMs of vortex beams are used.","PeriodicalId":46751,"journal":{"name":"Atmospheric and Oceanic Optics","volume":"38 4","pages":"386 - 393"},"PeriodicalIF":0.9,"publicationDate":"2025-09-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144990359","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

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Effect of Gas Pressure on Spatial and Spectral Characteristics of a Femtosecond Laser Pulse during Its Filamentation 气体压力对飞秒激光成丝过程空间和光谱特性的影响

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Atmospheric and Oceanic Optics Pub Date : 2025-09-04 DOI: 10.1134/S1024856025700253

D. V. Apeksimov, P. A. Babushkin, Yu. E. Geints, A. M. Kabanov, V. K. Oshlakov, A. V. Petrov, A. A. Udalov, E. E. Khoroshaeva

{"title":"Effect of Gas Pressure on Spatial and Spectral Characteristics of a Femtosecond Laser Pulse during Its Filamentation","authors":"D. V. Apeksimov, P. A. Babushkin, Yu. E. Geints, A. M. Kabanov, V. K. Oshlakov, A. V. Petrov, A. A. Udalov, E. E. Khoroshaeva","doi":"10.1134/S1024856025700253","DOIUrl":"10.1134/S1024856025700253","url":null,"abstract":"Filamentation of high-power femtosecond pulses in a gas is of great theoretical and practical interest with relation to the study of large-scale spectral and temporal transformations of laser radiation in a medium and generation of extra-wide (supercontinuum) radiation. This radiation is of interest in nonlinear femtosecond diagnostics of environment, optical data transmission through an atmospheric channel, and modern optical material processing techniques. This paper experimentally studies the effect of gas medium (nitrogen) pressure in an optical cell on the characteristics of femtosecond laser radiation propagating under filamentation conditions. It is found that high nitrogen pressure (up to 11 atm) and sharp geometric focusing of femtosecond radiation result in its Kerr self-focusing, which transforms from the single filamentation mode into multiple post filamentation as the gas pressure increases. Due to the phase self-modulation of a femtosecond pulse and plasma generation in the gas, the radiation spectrum is significantly enriched and the pulse spectrum near-linearly broadens with an increase in the gas pressure in the cell. It is ascertained for the first time that the pulse spectrum asymmetrically broadens mainly to the long-wave region while the initial beam focusing sharpness is increasing. The average size of high-intensity post-filaments formed inside a beam decreases as the gas pressure increases in the optical cell and can be fractions of a millimeter.","PeriodicalId":46751,"journal":{"name":"Atmospheric and Oceanic Optics","volume":"38 4","pages":"418 - 423"},"PeriodicalIF":0.9,"publicationDate":"2025-09-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144990360","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

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Energy Characteristics of a Copper Vapor Laser Pumped by a Marx Generator 马克思发生器抽运铜蒸气激光器的能量特性

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Atmospheric and Oceanic Optics Pub Date : 2025-09-04 DOI: 10.1134/S1024856025700332

H. A. Baalbaki, A. V. Malikov, N. A. Yudin

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Effect of Air Nanobubble Clusters on Optical Pulse Propagation in Water 空气纳米气泡团对光脉冲在水中传播的影响

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Atmospheric and Oceanic Optics Pub Date : 2025-09-04 DOI: 10.1134/S1024856025700204

V. F. Myshkin, V. A. Khan, S. F. Balandin, Cailun Wang, S. A. Sosnovsky

{"title":"Effect of Air Nanobubble Clusters on Optical Pulse Propagation in Water","authors":"V. F. Myshkin, V. A. Khan, S. F. Balandin, Cailun Wang, S. A. Sosnovsky","doi":"10.1134/S1024856025700204","DOIUrl":"10.1134/S1024856025700204","url":null,"abstract":"Development of mineral resources in the ocean presents the problem of high-speed communication between two underwater objects. Optical radiation provides the highest transmission rate. However, the turbidity of natural waters is strongly variable; therefore, the study of the effects of different components of water suspension on laser pulse transmission is relevant. In the work, propagation of 2-ns optical pulses at a wavelength of 0.514 μm in water containing only clusters of nanobubbles is simulated. The maximal flux of radiation scattered on nanobubble clusters at the entrance to a receiver is shown to be no higher than 10% of the radiation flux propagated without scattering along a path up to 150 m long; the pulse full width at half maximum decreases by no more than 30%. The restriction on the path length in water containing only clusters of nanobubbles is due to radiation attenuation. Our results can be used for prediction of the solar radiation penetration depth during diving operations in water bodies or analyses of images of underwater objects, as well as for the development and usage of equipment for open underwater optical telecommunication lines. The influence of organic and inorganic suspended matter on the laser radiation propagation in water is planned to be studied further.","PeriodicalId":46751,"journal":{"name":"Atmospheric and Oceanic Optics","volume":"38 4","pages":"379 - 385"},"PeriodicalIF":0.9,"publicationDate":"2025-09-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144990439","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0