Atmospheric and Oceanic Optics最新文献

Applicability of a Neural Network Approach to Retrieving the Optical Thickness and Effective Radius of Droplets in Single-Layer Horizontally Inhomogeneous Cloudiness 一种神经网络方法在反演单层水平非均匀云中水滴光学厚度和有效半径中的适用性

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Atmospheric and Oceanic Optics Pub Date : 2025-04-29 DOI: 10.1134/S1024856024701240

T. V. Russkova, A. V. Skorokhodov

{"title":"Applicability of a Neural Network Approach to Retrieving the Optical Thickness and Effective Radius of Droplets in Single-Layer Horizontally Inhomogeneous Cloudiness","authors":"T. V. Russkova, A. V. Skorokhodov","doi":"10.1134/S1024856024701240","DOIUrl":"10.1134/S1024856024701240","url":null,"abstract":"Liquid-drop clouds play a significant role in the evolution of cloud systems and the formation of the Earth’s radiation balance. Determination of their optical and microphysical characteristics is one of the most important problems of optics and atmospheric physics. The paper is devoted to assessing the applicability of an artificial neural network to processing synthetic data of passive satellite measurements of reflected solar radiation of low and medium spatial resolution in the visible and short-wave infrared spectral regions in order to simultaneously retrieve the optical thickness and effective radius of droplets of horizontally inhomogeneous cloudiness. The network is trained using the Monte Carlo calculated values of radiance in marine stratocumulus clouds generated by a fractal model. Through a nonlinear approximation of the dependence of optical and microphysical parameters of clouds on radiation characteristics, the tested algorithm allows taking into account the effects of horizontal radiative transfer, unlike classical IPA/NIPA (Independent Pixel Approximation/Nonlocal Independent Pixel Approximation) schemes. It is shown that the errors in solving the inverse problem can be reduced by assimilating data in adjacent pixels, reducing spatial resolution, and using radiance data received at small solar zenith angles. The high correlation between the test and retrieved optical thickness and effective radius indicate the possibility of using a neural network approach to interpreting satellite measurement data.","PeriodicalId":46751,"journal":{"name":"Atmospheric and Oceanic Optics","volume":"38 1","pages":"18 - 26"},"PeriodicalIF":0.9,"publicationDate":"2025-04-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143888554","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

Remote Spectrometric Measurements of Atmospheric Nitrogen Dioxide near Urban Thermal Power Plants 城市火力发电厂附近大气二氧化氮的遥感光谱测量

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Atmospheric and Oceanic Optics Pub Date : 2025-04-29 DOI: 10.1134/S1024856024701288

D. V. Ionov, M. V. Makarova

{"title":"Remote Spectrometric Measurements of Atmospheric Nitrogen Dioxide near Urban Thermal Power Plants","authors":"D. V. Ionov, M. V. Makarova","doi":"10.1134/S1024856024701288","DOIUrl":"10.1134/S1024856024701288","url":null,"abstract":"The operation of thermal power plants (TPP) is accompanied by the emission of various pollutants into the atmosphere, including nitrogen oxides. This paper presents the results of spectrometric measurements of the atmospheric NO2 content carried out on circular routes around large urban TPPs of St. Petersburg. The spatial variability of tropospheric NO2 content in the vicinity of a TPP is determined based on experimental data received by the DOAS (Differential Optical Absorption Spectroscopy) method and shows high values in the downwind side of stacks. The spatial distributions derived from the mobile DOAS measurements are confirmed by the results of numerical calculations of the NO2 content field with the HYSPLIT (HYbrid Single-Particle Lagrangian Integrated Trajectories) model taking into account a priori information on the volume of NOx emissions from main urban TPPs. Approximate estimates of NOx emissions from two the largest TPPs in St. Petersburg from calculations of the total flux of NO2 molecules through a loop-route DOAS measurements amount to ∼2–3 kt per year. These experimental data are important for determining the contribution of thermal power plants to anthropogenic atmospheric pollution.","PeriodicalId":46751,"journal":{"name":"Atmospheric and Oceanic Optics","volume":"38 1","pages":"51 - 58"},"PeriodicalIF":0.9,"publicationDate":"2025-04-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143888600","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

Complex Assessment of Air Composition over the Russian Arctic in September 2020 2020年9月俄罗斯北极上空空气成分的复杂评估

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Atmospheric and Oceanic Optics Pub Date : 2025-04-29 DOI: 10.1134/S1024856024701264

P. N. Antokhin, V. G. Arshinova, M. Yu. Arshinov, B. D. Belan, S. B. Belan, D. K. Davydov, G. A. Ivlev, A. V. Kozlov, T. M. Rasskazchikova, D. E. Savkin, D. V. Simonenkov, T. K. Sklyadneva, G. N. Tolmachev, A. V. Fofonov

{"title":"Complex Assessment of Air Composition over the Russian Arctic in September 2020","authors":"P. N. Antokhin, V. G. Arshinova, M. Yu. Arshinov, B. D. Belan, S. B. Belan, D. K. Davydov, G. A. Ivlev, A. V. Kozlov, T. M. Rasskazchikova, D. E. Savkin, D. V. Simonenkov, T. K. Sklyadneva, G. N. Tolmachev, A. V. Fofonov","doi":"10.1134/S1024856024701264","DOIUrl":"10.1134/S1024856024701264","url":null,"abstract":"Сlimate warming in the Arctic is several times faster than in other regions of the globe. This сan be the result of strengthening of feedbacks between climate and atmospheric composition. However, there are very few data on changes in the concentration of climatically active substances in this region. Therefore, to fill the gap in data on the vertical distribution of gas and aerosol composition of air over the Russian Arctic, an airborne survey of the atmosphere and water surface over all the Russian Arctic Ocean seas was performed with use of the Tu-134 Optik aircraft laboratory in September 2020. This paper analyzes the spatial distribution of gas and aerosol composition in the Arctic troposphere. It is shown that during the experiment, the CO2 mixing ratio increased in the near-water and boundary layers and decreased in the free troposphere from west to east. The methane content in the near-water layer decreased in the same direction. Concentrations of CO, NOX, and SO2 in the Russian Arctic were very low, which was typical for remote background areas. All aerosol fractions also showed a decrease in their content from west to east.","PeriodicalId":46751,"journal":{"name":"Atmospheric and Oceanic Optics","volume":"38 1","pages":"37 - 45"},"PeriodicalIF":0.9,"publicationDate":"2025-04-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143888555","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

Experimental Verification of the Model Dependence of the Turbulent Prandtl Number on the Gradient Richardson Number 湍流普朗特数对梯度理查德森数模型依赖性的实验验证

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Atmospheric and Oceanic Optics Pub Date : 2025-04-29 DOI: 10.1134/S1024856024701239

V. A. Banakh, I. N. Smalikho, I. V. Zaloznaya

{"title":"Experimental Verification of the Model Dependence of the Turbulent Prandtl Number on the Gradient Richardson Number","authors":"V. A. Banakh, I. N. Smalikho, I. V. Zaloznaya","doi":"10.1134/S1024856024701239","DOIUrl":"10.1134/S1024856024701239","url":null,"abstract":"A formula has been derived which connects the structural constant of temperature fluctuations with the dissipation rate of kinetic energy of turbulence not through the turbulent thermal diffusivity but through the vertical gradients of average wind velocity and air temperature and the turbulent Prandtl number. To estimate the structural constant of temperature using this formula, a model based on generalization of known data on the turbulent Prandtl number as a function of the gradient Richardson number is proposed. It has been experimentally shown that the time series of the structural constant of temperature, which is calculated using the proposed formula and independently found from the spectra of temperature fluctuations based on measurements of wind velocity and air temperature with sonic anemometers at two altitudes, are consistent with each other. This confirms correctness of the theoretical constructions the generalized results of which serve as the basis for the model dependence of the turbulent Prandtl number on the gradient Richardson number and opens possibilities of remote determination of the structural constant of temperature from measurements of wind velocity and temperature.","PeriodicalId":46751,"journal":{"name":"Atmospheric and Oceanic Optics","volume":"38 1","pages":"12 - 17"},"PeriodicalIF":0.9,"publicationDate":"2025-04-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143888598","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

Simulation of Severe Weather Events in Western Siberia Using WRF Atmospheric Model 用WRF大气模式模拟西伯利亚西部的恶劣天气事件

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Atmospheric and Oceanic Optics Pub Date : 2025-04-29 DOI: 10.1134/S1024856024701331

S. Yu. Zolotov, A. S. Loginov

引用次数: 0

Simulation of Greenhouse Gas Content in the Atmosphere of Oil- and Gas-Producing Areas 油气产区大气中温室气体含量的模拟

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Atmospheric and Oceanic Optics Pub Date : 2025-04-29 DOI: 10.1134/S1024856024701355

M. N. Alekseeva, D. V. Fedorov, I. G. Yashchenko, I. V. Russkikh

引用次数: 0

Remote Determination of Turbulence Parameters of a Stratified Atmospheric Boundary Layer 层状大气边界层湍流参数的远程测定

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Atmospheric and Oceanic Optics Pub Date : 2025-04-29 DOI: 10.1134/S1024856024701227

V. A. Banakh, I. N. Smalikho, E. V. Gordeev, A. A. Sukharev, A. V. Falits

{"title":"Remote Determination of Turbulence Parameters of a Stratified Atmospheric Boundary Layer","authors":"V. A. Banakh, I. N. Smalikho, E. V. Gordeev, A. A. Sukharev, A. V. Falits","doi":"10.1134/S1024856024701227","DOIUrl":"10.1134/S1024856024701227","url":null,"abstract":"Results of experiments on determining turbulence parameters of a stratified atmospheric boundary layer by means of remote sensing are presented. The height–time distributions of the dissipation rate of kinetic energy of turbulence and those of the structural constant of turbulent fluctuations of temperature obtained using a coherent wind lidar and a temperature radiometer are compared with height variations in parameters characterizing atmospheric stratification. It is shown that the dissipation rate which determines the intensity of wind turbulence decreases in the boundary layer with height for all types of thermal stratification. The intensity of turbulent fluctuations of temperature depends to a greater extent on variations in thermodynamic stability in the atmosphere. If the thermal instability of the atmosphere at larger heights exceeds that in lower layers, then the structural constant of temperature fluctuations can not decrease but increase with height. In accordance with height variations in the structural constant of temperature, values of the structural constant of turbulent pulsations of the refractive index can also increase with height and differ from those predicted based on known models.","PeriodicalId":46751,"journal":{"name":"Atmospheric and Oceanic Optics","volume":"38 1","pages":"1 - 11"},"PeriodicalIF":0.9,"publicationDate":"2025-04-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143888597","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

Comparison of MetOp Satellite and Mobile Lidar Ozone Profiles MetOp卫星与移动激光雷达臭氧廓线的比较

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Atmospheric and Oceanic Optics Pub Date : 2025-04-29 DOI: 10.1134/S1024856024701379

A. A. Nevzorov, A. V. Nevzorov, N. S. Kravtsova, O. V. Kharchenko, Ya. O. Romanovskii

{"title":"Comparison of MetOp Satellite and Mobile Lidar Ozone Profiles","authors":"A. A. Nevzorov, A. V. Nevzorov, N. S. Kravtsova, O. V. Kharchenko, Ya. O. Romanovskii","doi":"10.1134/S1024856024701379","DOIUrl":"10.1134/S1024856024701379","url":null,"abstract":"Atmospheric trace gases (ATGs) are optically active constituents of the atmosphere. ATGs have a great influence on atmospheric processes: transformation of solar radiation, weather formation, air pollution by industrial emissions, and propagation of optical waves. Ozone occupies a special place among ATGs. The ozone layer plays the role of natural protection of the planet from shortwave solar radiation. Therefore, monitoring of the ozonosphere by ground-based and satellite instruments allows us to obtain the most reliable data on the state of the atmosphere and, in particular, the ozone layer. The solution of this urgent problem is possible only with permanent improvement of the hardware base and perfection of methodological approaches to scientific research of the atmosphere. In this work, a number of measurements were carried out using a mobile ozone lidar at the sensing wavelengths of 299/341 nm in the altitude range 0.1–12 km at the Siberian lidar station (SLS). Vertical ozone profiles retrieved from lidar and meteorological satellite data of the European Space Agency (MetOp) obtained in 2023 were compared. The comparisons showed that the average relative difference between the profiles varies from −65.6% to 15.3% at altitudes from 0.1 km to 12 km. The comparison results confirm good prospects for using these ozone sensing wavelengths in the altitude range 0.1–5 km, previously uncovered by the SLS. The results will be used in modeling the vertical distribution of ozone concentration and in assessing the ecological state of the atmosphere in the Tomsk oblast.","PeriodicalId":46751,"journal":{"name":"Atmospheric and Oceanic Optics","volume":"38 1","pages":"112 - 117"},"PeriodicalIF":0.9,"publicationDate":"2025-04-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143888796","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

Optical Properties of Atmospheric Ice Crystals of Arbitrary Shape with Different Number of Facets for Problems of Laser Sensing 激光传感问题中任意形状不同面数大气冰晶的光学特性

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Atmospheric and Oceanic Optics Pub Date : 2025-04-29 DOI: 10.1134/S1024856024701343

V. A. Shishko, I. V. Tkachev, D. N. Timofeev, N. V. Kustova, A. V. Konoshonkin

引用次数: 0

Synergetic Ground-Based MW + IR Method for Ozone Profiling 协同地面微波+红外臭氧分析方法

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Atmospheric and Oceanic Optics Pub Date : 2025-04-29 DOI: 10.1134/S1024856024701276

Yu. I. Bordovskaya, Yu. M. Timofeev, Ya. A. Virolainen, A. V. Poberovskii

引用次数: 0