Atmospheric and Oceanic Optics最新文献_第10页

Verification of Physical Optics Approximation by the Discrete Dipole Method in Calculations of Light Backscattering 光后向散射计算中离散偶极子法物理光学近似的验证

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Atmospheric and Oceanic Optics Pub Date : 2026-04-13 DOI: 10.1134/S1024856025701015

K. S. Salnikov, A. V. Konoshonkin, I. V. Tkachev, N. V. Kustova, V. A. Shishko, D. N. Timofeev, N. Kan

{"title":"Verification of Physical Optics Approximation by the Discrete Dipole Method in Calculations of Light Backscattering","authors":"K. S. Salnikov, A. V. Konoshonkin, I. V. Tkachev, N. V. Kustova, V. A. Shishko, D. N. Timofeev, N. Kan","doi":"10.1134/S1024856025701015","DOIUrl":"10.1134/S1024856025701015","url":null,"abstract":"In problems of atmospheric remote sensing, particularly in interpreting lidar signals from cirrus clouds, the accuracy of modeling light scattering by nonspherical randomly oriented ice particles plays a crucial role. Although the physical optics approximation is commonly used due to its computational efficiency, it does not always provide sufficient accuracy, especially when particle sizes are comparable to the wavelength of incident radiation. This introduces systematic errors into scattering matrix databases used for solving inverse problems. This study employs the discrete dipole approximation to verify the validity of the physical optics approximation. The primary focus is on comparing results obtained at wavelengths of 0.532 and 1.064 μm for particles with various shapes and sizes from two to eight wavelengths. It is shown that using the physical optics approximation in this case leads to relative errors of up to 20% in the determination of the linear depolarization ratio, as well as to underestimation of the backscattering intensity by half. The findings enable a more precise estimation of the applicability limits of the physical optics approximation and provide corrections for the existing scattering matrix databases. This, in turn, will improve the accuracy of lidar data interpretation and enhance the quality of microphysical retrievals for cirrus clouds.","PeriodicalId":46751,"journal":{"name":"Atmospheric and Oceanic Optics","volume":"39 1","pages":"81 - 90"},"PeriodicalIF":0.9,"publicationDate":"2026-04-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147665716","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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Observation of Polar Stratospheric Clouds in the Stratosphere over Tomsk in February 2025 2025年2月托木斯克上空平流层极地平流层云的观测

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Atmospheric and Oceanic Optics Pub Date : 2026-04-13 DOI: 10.1134/S1024856025700940

A. V. Nevzorov, S. I. Dolgii, A. P. Makeev, V. N. Marichev, D. A. Bochkovsky, N. S. Salnikova, O. V. Kharchenko

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Components of the Turbulence Anisotropy Tensor in the Surface Air Layer 地面空气层湍流各向异性张量的分量

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Atmospheric and Oceanic Optics Pub Date : 2026-04-13 DOI: 10.1134/S1024856025700873

V. A. Gladkikh, A. P. Kamardin, I. V. Nevzorova, S. L. Odintsov

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Aircraft LRV-2 Lidar Measurements of Vertical Wind Speed and Turbulence Parameters 飞机LRV-2激光雷达测量垂直风速和湍流参数

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Atmospheric and Oceanic Optics Pub Date : 2026-04-13 DOI: 10.1134/S1024856025700964

A. M. Sherstobitov, V. A. Banakh, I. N. Smalikho

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Critical Evaluation of Measured Transition Frequencies of 16OD Molecule in X2Π State Using the Ritz Principle 利用Ritz原理对X2Π态16OD分子跃迁频率的临界评价

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Atmospheric and Oceanic Optics Pub Date : 2026-03-16 DOI: 10.1134/S1024856025700861

O. N. Sulakshina, Yu. G. Borkov

{"title":"Critical Evaluation of Measured Transition Frequencies of 16OD Molecule in X2Π State Using the Ritz Principle","authors":"O. N. Sulakshina, Yu. G. Borkov","doi":"10.1134/S1024856025700861","DOIUrl":"10.1134/S1024856025700861","url":null,"abstract":"Determining the spectrum structure, i.e., finding the empirical energy levels of a molecule, is a relevant and important task of spectroscopy. For deuterated hydroxyl (OD), such information is absent in known spectroscopic databases. Therefore, empirical energy levels of 16OD were determined in this work. For the first time, the critical analysis of 3138 available experimental frequencies of rotational and vibrational-rotational transitions of 16OD molecule in X2П ground electronic state was performed using the Ritz combination principle. Transitions with hyperfine splitting were not considered. The transition frequencies weighted in accordance with the experimental uncertanties were processed by the RITZ program code. The analysis of the dimensionless weighted deviations enabled us to exclude from the consideration the frequencies with the weighted deviation higher than four. The resulting set of 2984 transition frequencies made possible processing with a standard deviation of 1.24. As a result of critical evaluation, a set of 864 empirical RITZ energy levels was obtained with an appropriate uncertainty for each level for the first time. The found empirical RITZ energy levels were compared with known literature data.","PeriodicalId":46751,"journal":{"name":"Atmospheric and Oceanic Optics","volume":"38 6","pages":"785 - 801"},"PeriodicalIF":0.9,"publicationDate":"2026-03-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147559570","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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Spatial Distribution of Carbon Dioxide Concentration in Baikal Surface Water in Spring 贝加尔湖春季地表水二氧化碳浓度的空间分布

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Atmospheric and Oceanic Optics Pub Date : 2026-03-16 DOI: 10.1134/S1024856025700988

D. A. Pestunov, M. V. Panchenko, V. M. Domysheva, M. V. Sakirko, A. M. Shamrin, V. P. Shmargunov, V. G. Ivanov

{"title":"Spatial Distribution of Carbon Dioxide Concentration in Baikal Surface Water in Spring","authors":"D. A. Pestunov, M. V. Panchenko, V. M. Domysheva, M. V. Sakirko, A. M. Shamrin, V. P. Shmargunov, V. G. Ivanov","doi":"10.1134/S1024856025700988","DOIUrl":"10.1134/S1024856025700988","url":null,"abstract":"Correct assessments of greenhouse gas fluxes and the global carbon cycle require well-provided data on greenhouse gas sources and sinks in the surface–air system at different natural sites. This work summarizes the results of shipboard measurements of carbon dioxide concentration in surface water throughout the water area of Lake Baikal in eight spring campaigns of Limnological Institute, Siberian Branch, Russian Academy of Sciences. Spring period is of particular interest for research, since due to the large geographical extent of the lake from south to north, after the ice breakup, the water gradually warms up. This makes it possible to take measurements in relatively different “seasons” during a time-limited expedition. Against the background of interannual variability of the spatial distribution of CO2 concentration in the Baikal surface water in spring, its decrease from the Southern to the Northern basins of the lake is pronounced. While moving away from the coastal zone to the central part of the water area (to depths of more than 200 m), the concentration of dissolved carbon dioxide increases. The results of the study are of interest to specialists in climate issues and biologists, since carbon dioxide is one of the integral components of the carbon cycle during photosynthesis of aquatic plankton in the Baikal water.","PeriodicalId":46751,"journal":{"name":"Atmospheric and Oceanic Optics","volume":"38 6","pages":"821 - 829"},"PeriodicalIF":0.9,"publicationDate":"2026-03-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147560167","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

Quality of Collections of Experimental Vibration-Rotational Energy Levels and Transitions of H2O Molecule. 1. Quasi-Empirical Energy Levels 水分子振动-旋转能级和跃迁实验收集的质量。准经验能级

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Atmospheric and Oceanic Optics Pub Date : 2026-03-16 DOI: 10.1134/S1024856025700587

N. A. Lavrentiev, A. Yu. Akhlestin, A. I. Privezentsev, A. Z. Fazliev

引用次数: 0

Detectability of Tritium Isotopologues HTO and T2O in Radioactive Water Vapors by IR Spectroscopy 红外光谱法测定放射性水蒸气中氚同位素HTO和T2O的可探测性

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Atmospheric and Oceanic Optics Pub Date : 2026-03-16 DOI: 10.1134/S1024856025700599

A. V. Chentsov, T. Yu. Chesnokova, G. A. Kolotkov, Yu. V. Voronina, B. A. Voronin

{"title":"Detectability of Tritium Isotopologues HTO and T2O in Radioactive Water Vapors by IR Spectroscopy","authors":"A. V. Chentsov, T. Yu. Chesnokova, G. A. Kolotkov, Yu. V. Voronina, B. A. Voronin","doi":"10.1134/S1024856025700599","DOIUrl":"10.1134/S1024856025700599","url":null,"abstract":"Large amount of tritium, which is a radioactive isotope of hydrogen and is hazardous to all living things, enter the environment from anthropogenic sources, including accidents at nuclear power plants. Monitoring of tritium in water and air is very important for assessing environmental and radiation risks. Our study is devoted to the development of an infrared (IR) spectroscopy-based trace method for monitoring tritium isotopologues of water (HTO and T2O). The main objective is to estimate the sensitivity of IR spectroscopy for detecting low concentrations of HTO and T2O in water vapors, which is critical for the operational monitoring of radioactive contamination. The transmission of the tritium isotopologues is simulated by line-by-line method at different concentrations. The spectroscopic data from theoretical calculations and experimental measurements, including absorption line parameters from spectra.iao.ru and HITRAN2020 databases, are used in the simulation. The line broadening coefficients were refined with the use of the authors’ technique. The main results of this work include: improved line broadening parameters, which provide an increase in the simulation accuracy; revealed optimal spectral regions for detecting HTO (1227–1236 and 2219–2226 cm−1) and T2O (930–990 and 1092–1100 cm−1) in the atmospheric transparency window 8–12 μm; estimated detection threshold for tritium isotopologues at a level of 0.01–0.05% of the concentration of the main isotopologue H216O. The results open up opportunities for creating real-time tritium monitoring systems. Promising areas for further research are adaptation of the method to field conditions with allowance for the atmospheric effect and integration of spectroscopic data into climate models. The work contributes to the development of environmental monitoring and radiation safety methods.","PeriodicalId":46751,"journal":{"name":"Atmospheric and Oceanic Optics","volume":"38 6","pages":"688 - 695"},"PeriodicalIF":0.9,"publicationDate":"2026-03-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147560061","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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An Algorithm for Identifying Pollution Sources with Non-Linear Measurement Operators 基于非线性测量算子的污染源识别算法

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Atmospheric and Oceanic Optics Pub Date : 2026-03-16 DOI: 10.1134/S1024856025701003

A. V. Penenko, E. V. Rusin, M. K. Emelyanov

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Correlation between the Structure Characteristic of the Refractive Index of Optical Waves in the Surface Air Layer and Meteorological Parameters 地面空气层光波折射率的结构特征与气象参数的关系

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Atmospheric and Oceanic Optics Pub Date : 2026-03-16 DOI: 10.1134/S1024856025700605

S. L. Odintsov, V. A. Gladkikh, A. P. Kamardin, I. V. Nevzorova

{"title":"Correlation between the Structure Characteristic of the Refractive Index of Optical Waves in the Surface Air Layer and Meteorological Parameters","authors":"S. L. Odintsov, V. A. Gladkikh, A. P. Kamardin, I. V. Nevzorova","doi":"10.1134/S1024856025700605","DOIUrl":"10.1134/S1024856025700605","url":null,"abstract":"When studying the propagation of optical radiation through the atmosphere, it is important to take into account its possible distortions due to turbulence of temperature and wind fields. The dependence of the structure characteristic of the refractive index of optical waves in the surface air layer on gradients of temperature and wind velocity, as well as on turbulent heat fluxes and friction (dynamic) velocity is considered based on experimental data obtained in 2024 at the Basic Experimental Complex of Institute of Atmospheric Optics, Siberian Branch, Russian Academy of Sciences (Tomsk, Russia), with an ultrasonic anemometer-thermometer (ultrasonic weather station) and a meteorological temperature profiler. Some regularities are identified in the correlation between the structure characteristic and the meteorological parameters. It is noted that high values of the structure characteristic can take place under conditions of temperature inversions. The results can be useful in solving problems of atmospheric optics, in particular, propagation of laser radiation.","PeriodicalId":46751,"journal":{"name":"Atmospheric and Oceanic Optics","volume":"38 6","pages":"696 - 702"},"PeriodicalIF":0.9,"publicationDate":"2026-03-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147560062","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