Atmospheric and Oceanic Optics最新文献_第7页

CALIOP Data for Estimating the Multilayer Cloud Base Height from MODIS Imagery Based on Fuzzy Logic Methods 基于模糊逻辑方法的MODIS影像多层云底高度估算的CALIOP数据

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Atmospheric and Oceanic Optics Pub Date : 2026-05-30 DOI: 10.1134/S1024856025701179

A. V. Skorokhodov

{"title":"CALIOP Data for Estimating the Multilayer Cloud Base Height from MODIS Imagery Based on Fuzzy Logic Methods","authors":"A. V. Skorokhodov","doi":"10.1134/S1024856025701179","DOIUrl":"10.1134/S1024856025701179","url":null,"abstract":"An algorithm for estimating the base height of individual levels in multilayer clouds from passive satellite sensor data based on fuzzy logic methods is presented. The procedure for retrieving the cloud-base height is considered as a special case of solving the classification problem. The classes are narrow ranges of the target parameter; the classification features are cloud parameters retrieved from passive satellite sounding. Methods of fuzzy logic allow one to include one object in several classes at once but with different grades of membership, which enables estimating the base height for several simultaneously observed levels of clouds. The classifier is trained based on synchronous CALIOP (Cloud-Aerosol Lidar with Orthogonal Polarization) and MODIS (Moderate Resolution Imaging Spectroradiometer) data received over Western Siberia in summer in 2013–2018. The cloud base height is estimated only from passive satellite sensor data. Two fuzzy self-organizing methods (Fuzzy C-means and Gustafson–Kessel) are considered. The second approach has been found to be more effective; it provides a deviation of −0.5 km for the retrieved base heights of clouds with an optical thickness less than 10 as compared to reference ones at a standard deviation of 1.5 km for the overlying cloud layer and −0.1 km at a standard deviation of 2.1 km for the underlying layer.","PeriodicalId":46751,"journal":{"name":"Atmospheric and Oceanic Optics","volume":"39 2","pages":"205 - 213"},"PeriodicalIF":0.9,"publicationDate":"2026-05-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148061259","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

Dielectric Mirror with High Reflectance at 266 nm for Ozone Lidars 用于臭氧激光雷达的266nm高反射率介质镜

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Atmospheric and Oceanic Optics Pub Date : 2026-05-30 DOI: 10.1134/S1024856025701209

V. S. Kuznetsov, M. M. Zinovev, N. N. Yudin, O. A. Romanovskii, A. A. Nevzorov, S. V. Yakovlev, S. A. Sadovnikov, A. L. Khudoley, D. V. Vlasov

引用次数: 0

Vertical Distribution of Gamma Background in the Atmosphere over Western Siberia and Adjacent Territories 西伯利亚西部及邻近地区大气中伽马背景的垂直分布

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Atmospheric and Oceanic Optics Pub Date : 2026-05-30 DOI: 10.1134/S102485602570112X

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

{"title":"Vertical Distribution of Gamma Background in the Atmosphere over Western Siberia and Adjacent Territories","authors":"P. N. Antokhin, V. G. Arshinova, M. Yu. Arshinov, B. D. Belan, S. B. Belan, D. K. Davydov, N. V. Dudorova, G. A. Ivlev, A. V. Kozlov, G. A. Kolotkov, T. M. Rasskazchikova, D. E. Savkin, D. V. Simonenkov, T. K. Sklyadneva, G. N. Tolmachev, A. V. Fofonov","doi":"10.1134/S102485602570112X","DOIUrl":"10.1134/S102485602570112X","url":null,"abstract":"Natural gamma radiation easily penetrates into the cells of a human body and destructively affects all structures causing a wide range of diseases. It also plays an active role in the atmosphere by participating in electrical processes and origination of ions, which affects cloud formation, precipitation, radiation balance, etc. There are very few measurements of the vertical distribution of gamma background over the Russian territory. This paper summarizes the results of aircraft sounding in 2003–2025. Based on the analysis of the long-term data, an average vertical profile of this parameter has been calculated, which shows its nonlinear increase with altitude. In the surface air layer, this parameter varied within 0.03–0.25 μSv/h with the average over the period under study being 0.11 μSv/h. At an altitude of 10 km, the gamma background varied in the range 2.18–2.80 μSv/h, and the average was 2.35 μSv/h. The analysis of the latitudinal distribution revealed the belt 60°–70° N with high gamma radiation values; the gamma background was lower to the south and north of that belt. The data analysis has also revealed a weak annual gamma background variation with a maximum in November and a minimum in August, which is not typical for other atmospheric parameters. The results can be useful for choosing the range and uncertainty of developed radiation protection devices and means, as well as for assessing the probability of origination of radiative effects.","PeriodicalId":46751,"journal":{"name":"Atmospheric and Oceanic Optics","volume":"39 2","pages":"169 - 174"},"PeriodicalIF":0.9,"publicationDate":"2026-05-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148061209","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

One-Parameter Model of the Spectral Behavior of Aerosol Attenuation Coefficient for Hazes in the Surface Air Layer 大气表层雾霾气溶胶衰减系数谱特征的单参数模型

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Atmospheric and Oceanic Optics Pub Date : 2026-05-30 DOI: 10.1134/S1024856025701106

N. N. Shchelkanov

引用次数: 0

Vertical Distribution of Gamma Background in the Atmosphere over Western Siberia and Adjacent Territories 西伯利亚西部及邻近地区大气中伽马背景的垂直分布

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Atmospheric and Oceanic Optics Pub Date : 2026-05-30 DOI: 10.1134/S102485602570112X

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

{"title":"Vertical Distribution of Gamma Background in the Atmosphere over Western Siberia and Adjacent Territories","authors":"P. N. Antokhin, V. G. Arshinova, M. Yu. Arshinov, B. D. Belan, S. B. Belan, D. K. Davydov, N. V. Dudorova, G. A. Ivlev, A. V. Kozlov, G. A. Kolotkov, T. M. Rasskazchikova, D. E. Savkin, D. V. Simonenkov, T. K. Sklyadneva, G. N. Tolmachev, A. V. Fofonov","doi":"10.1134/S102485602570112X","DOIUrl":"10.1134/S102485602570112X","url":null,"abstract":"Natural gamma radiation easily penetrates into the cells of a human body and destructively affects all structures causing a wide range of diseases. It also plays an active role in the atmosphere by participating in electrical processes and origination of ions, which affects cloud formation, precipitation, radiation balance, etc. There are very few measurements of the vertical distribution of gamma background over the Russian territory. This paper summarizes the results of aircraft sounding in 2003–2025. Based on the analysis of the long-term data, an average vertical profile of this parameter has been calculated, which shows its nonlinear increase with altitude. In the surface air layer, this parameter varied within 0.03–0.25 μSv/h with the average over the period under study being 0.11 μSv/h. At an altitude of 10 km, the gamma background varied in the range 2.18–2.80 μSv/h, and the average was 2.35 μSv/h. The analysis of the latitudinal distribution revealed the belt 60°–70° N with high gamma radiation values; the gamma background was lower to the south and north of that belt. The data analysis has also revealed a weak annual gamma background variation with a maximum in November and a minimum in August, which is not typical for other atmospheric parameters. The results can be useful for choosing the range and uncertainty of developed radiation protection devices and means, as well as for assessing the probability of origination of radiative effects.","PeriodicalId":46751,"journal":{"name":"Atmospheric and Oceanic Optics","volume":"39 2","pages":"169 - 174"},"PeriodicalIF":0.9,"publicationDate":"2026-05-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148061227","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 Search for Optimal Laser Radiation Wavelength for Black Sea Water Sounding 黑海海水测深最佳激光辐射波长的实验研究

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Atmospheric and Oceanic Optics Pub Date : 2026-05-30 DOI: 10.1134/S1024856025701143

M. A. Karpov, N. V. Tcherniega, A. D. Kudryavtseva, S. F. Umanskaya, N. A. Kleopova, K. V. Kulikovsky, T. V. Baikova

{"title":"Experimental Search for Optimal Laser Radiation Wavelength for Black Sea Water Sounding","authors":"M. A. Karpov, N. V. Tcherniega, A. D. Kudryavtseva, S. F. Umanskaya, N. A. Kleopova, K. V. Kulikovsky, T. V. Baikova","doi":"10.1134/S1024856025701143","DOIUrl":"10.1134/S1024856025701143","url":null,"abstract":"An optimal radiation wavelength for scanning marine surface from air is found, which provides minimal radiation absorption, parasitic fluorescence, beam divergence, and scattering in the water column. These parameters depend on the laser type used. The research focused on water samples from the Black Sea collected 200 m from the shore immediately before the experiment and water samples stored for one year in light-protected hermetically sealed containers. For both sets of samples, the following characteristics were examined: scattering phase function, spectral transmittance, laser beam divergence, particle size distribution of organic matter in the samples, and its effect on fluorescence spectra. Commercial semiconductor lasers with wavelengths of 450, 520, and 660 nm were used. The study shows a 450-nm laser to be optimal for underwater sounding tasks since it exhibits the lowest radiation attenuation in the water column (0.5 dB/m), the smallest scattering spot, and minimal fluorescence. Organic particles do not significantly affect hydrooptical properties of seawater in the both sets of samples. The results can be used in the design of above-water and underwater laser sounding systems for marine surface analysis.","PeriodicalId":46751,"journal":{"name":"Atmospheric and Oceanic Optics","volume":"39 2","pages":"185 - 191"},"PeriodicalIF":0.9,"publicationDate":"2026-05-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148061258","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

Compensation of Laser Radiation Wavefront Fluctuations in a Turbulent Medium 湍流介质中激光辐射波前波动的补偿

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Atmospheric and Oceanic Optics Pub Date : 2026-05-30 DOI: 10.1134/S1024856025701052

A. L. Rukosuev, V. A. Bogachev, M. V. Volkov, A. V. Kudryashov, A. N. Nikitin, Yu. V. Sheldakova, F. A. Starikov

{"title":"Compensation of Laser Radiation Wavefront Fluctuations in a Turbulent Medium","authors":"A. L. Rukosuev, V. A. Bogachev, M. V. Volkov, A. V. Kudryashov, A. N. Nikitin, Yu. V. Sheldakova, F. A. Starikov","doi":"10.1134/S1024856025701052","DOIUrl":"10.1134/S1024856025701052","url":null,"abstract":"This work is devoted to the development and experimental verification of effective methods for compensating dynamic atmospheric distortions of a laser beam propagating through a turbulent medium. A laboratory experiment on the correction of wavefront distortions of laser radiation propagating along a turbulent path in a pavilion was performed, where turbulence was simulated using a fan heater supplying warm air perpendicular to the beam propagation. The distortion compensation was performed using an adaptive optics system with a wavefront tilt corrector and a bimorph deformable mirror. The system efficiency was assessed from the analysis of the far-field intensity distribution. We have shown that the generated turbulent distortions are spectrally similar to Kolmogorov turbulence with a bandwidth of about 30 Hz. For effective compensation of wavefront aberrations, the operating frequency of the adaptive optics system should be 20–30 times higher than the turbulence bandwidth. At a system operating frequency of 1 kHz, the beam divergence was reduced to 1.4 of the diffraction limit. Increasing the frequency to 2 kHz and using FPGA, we attained beam stabilization accuracy of 5 μrad. The results of this work can be used to design high-performance systems related to laser radiation propagation in a turbulent medium.","PeriodicalId":46751,"journal":{"name":"Atmospheric and Oceanic Optics","volume":"39 2","pages":"117 - 125"},"PeriodicalIF":0.9,"publicationDate":"2026-05-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148061260","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

Automatic Identification of Lines in Vibrational-Rotational Spectra: Trainable Neural Network Based Software 振动旋转谱线的自动识别：基于可训练神经网络的软件

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Atmospheric and Oceanic Optics Pub Date : 2026-05-30 DOI: 10.1134/S1024856025701088

A. D. Bykov, O. V. Naumenko, A. P. Shcherbakov

引用次数: 0

Estimates of Transboundary Transfer and Balance of Atmospheric Carbon Dioxide Fluxes in Sverdlovsk Region Using the Machine Learning Model 利用机器学习模型估算斯维尔德洛夫斯克地区大气二氧化碳通量的跨界转移和平衡

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Atmospheric and Oceanic Optics Pub Date : 2026-05-30 DOI: 10.1134/S1024856025701180

A. P. Rozanov, K. G. Gribanov, I. V. Zadvornykh, G. A. Sukhikh, V. V. Valdaiskikh, V. I. Zakharov

{"title":"Estimates of Transboundary Transfer and Balance of Atmospheric Carbon Dioxide Fluxes in Sverdlovsk Region Using the Machine Learning Model","authors":"A. P. Rozanov, K. G. Gribanov, I. V. Zadvornykh, G. A. Sukhikh, V. V. Valdaiskikh, V. I. Zakharov","doi":"10.1134/S1024856025701180","DOIUrl":"10.1134/S1024856025701180","url":null,"abstract":"In connection with the global warming problem caused by the increase in the concentration of greenhouse gases in the atmosphere, estimating the potential of different ecosystems for the sequestration of atmospheric carbon dioxide on both regional and global scales is a topical problem. In this work, the balance of natural carbon dioxide fluxes throughout Sverdlovsk region is considered. An integral estimate of net CO2 absorbed from the atmosphere by regional ecosystems over 2020–2022 is obtained for the first time using an original NorthFlux machine learning model, where spectra data from the MODIS satellite sensor, meteorological data of retrospective climate analysis, and satellite data on the classification of the underlying surface vegetation are used as input. The data on the amount of anthropogenic CO2 emissions is taken from the inventory of greenhouse gas emissions in Sverdlovsk region. The transboundary transfer of carbon dioxide is estimated using a balance equation for CO2 fluxes in the atmospheric column and data on the average annual rate of increase in the CO2 concentration in the regional atmosphere obtained from ground-based Bruker IFS 125M high-resolution measurements at the Kourovka Astronomical Observatory in 2012–2024. It has been found that the sequestration of atmospheric CO2 by ecosystems of Sverdlovsk region ranges from 10.9 to 15.2% and the transboundary transfer of CO2 through the region boundaries to neighboring regions ranges from 72.5 to 76.7% of the annual industrial CO2 emissions in the region. The NorthFlux machine learning model can be useful for estimating the sequestering potential of ecosystems in other regions of the planet.","PeriodicalId":46751,"journal":{"name":"Atmospheric and Oceanic Optics","volume":"39 2","pages":"214 - 220"},"PeriodicalIF":0.9,"publicationDate":"2026-05-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148061305","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

High-Resolution Spectroscopy Study of the Spectrum of CH37Cl3 Isotopologue of Gaseous Chloroform in 2-mm Wavelength Range 气态氯仿CH37Cl3同位素物2-mm波段光谱的高分辨率光谱研究

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Atmospheric and Oceanic Optics Pub Date : 2026-05-30 DOI: 10.1134/S1024856025701076

V. L. Vaks, E. G. Domracheva, M. B. Chernyaeva, V. A. Anfertev, A. K. Tretyakov, Yu. V. Kistenev

{"title":"High-Resolution Spectroscopy Study of the Spectrum of CH37Cl3 Isotopologue of Gaseous Chloroform in 2-mm Wavelength Range","authors":"V. L. Vaks, E. G. Domracheva, M. B. Chernyaeva, V. A. Anfertev, A. K. Tretyakov, Yu. V. Kistenev","doi":"10.1134/S1024856025701076","DOIUrl":"10.1134/S1024856025701076","url":null,"abstract":"Chloroform is one of dangerous air pollutants. To control it in the atmosphere by absorption spectroscopy, it is necessary to know the position of its spectral lines. In this work, the absorption spectra of CH37Cl3 isotopologue of gaseous chloroform are measured using a high-resolution nonstationary spectrometer in the frequency range 118–175 GHz, where spectroscopic data for this compound are absent. The identification of the chloroform lines presented in the literature and assigned to the vibrational state ν2 of CH35Cl3 is refined; their belonging to CH37Cl3 isotopologue is shown. The experimental results are compared with our theoretical estimates of absorption line centers of the rotational spectrum of this molecule in the same spectral range. Absorption lines of CH37Cl3 isotopologue in the ground state were detected and identified in the spectral subranges near 131.4, 137.6, 150.1, and 156.4 GHz. Based on the experimental spectra, we have estimated the molecular constants B = 3129.56 MHz, DJ = 1.34 kHz, and DJK = −2.25 kHz with RMSE = 7.84 × 10−2 MHz, which determine transition frequencies in absorption spectra near 150.1 and 156.4 GHz more accurately than molecular constants given in the literature (B = 3129.61 MHz, DJ = 1.37 kHz, and DJK = −2.28 kHz with RMSE = 11.55 × 10−2 MHz). The results can be used for controlling the atmospheric content of chloroform.","PeriodicalId":46751,"journal":{"name":"Atmospheric and Oceanic Optics","volume":"39 2","pages":"136 - 142"},"PeriodicalIF":0.9,"publicationDate":"2026-05-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148061223","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