摘要 :
A survey of the development of adaptive optics, its methods, and tools for the elimination of irregular distortions appearing in the process of light propagation in an inhomogeneous medium is presented. Many ideas developed in rec...
展开
A survey of the development of adaptive optics, its methods, and tools for the elimination of irregular distortions appearing in the process of light propagation in an inhomogeneous medium is presented. Many ideas developed in recent years were put forward rather long ago; however, only now, owing to creation of state-of-the-art hardware components of optoelectronic systems and devices, they begin to be included in the widest fields of science and technology. The work also presents the current status of adaptive optics systems in solar astronomy, as well as some aspects of their use in systems correcting distortions of powerful laser systems. A retrospective analysis of investigations in the V.E. Zuev Institute of Atmospheric Optics in relation to adaptive optics is carried out.
收起
摘要 :
We describe the current state and technical characteristics of Tropospheric Ozone Research (TOR) station, created 25 years ago to monitor atmospheric composition, basic meteorological variables, and other parameters. The multiyear...
展开
We describe the current state and technical characteristics of Tropospheric Ozone Research (TOR) station, created 25 years ago to monitor atmospheric composition, basic meteorological variables, and other parameters. The multiyear observations showed that the air quality on the territory of Akademgorodok in Tomsk has been substantially degraded since the creation and development of the Special Economic Zone on its territory.
收起
摘要 :
Data of multiyear monitoring at the TOR station are used to calculate the average concentrations of gas and aerosol constituents in different air masses in the region of Tomsk. It is shown that CO~(2)and CH~(4)are characterized by...
展开
Data of multiyear monitoring at the TOR station are used to calculate the average concentrations of gas and aerosol constituents in different air masses in the region of Tomsk. It is shown that CO~(2)and CH~(4)are characterized by a decrease in concentrations in going from an Arctic to a tropical air mass. Ozone shows the opposite pattern: the largest concentrations are recorded in the tropical air mass and the smallest concentrations in the Arctic air mass. Such gases as CO and SO~(2)show distributions more complex in character.
收起
摘要 :
Lidar and searchlight instruments and techniques for atmospheric research developed at the V.E.?Zuev Institute of Atmospheric Optics, Siberian Branch, Russian Academy of Sciences, in recent years are described. Key results obtaine...
展开
Lidar and searchlight instruments and techniques for atmospheric research developed at the V.E.?Zuev Institute of Atmospheric Optics, Siberian Branch, Russian Academy of Sciences, in recent years are described. Key results obtained using these techniques are presented.
收起
摘要 :
In the work dedicated to the 50th anniversary of the V.E. Zuev Institute of Atmospheric Optics, Siberian Branch, Russian Academy of Sciences (IAO SB RAS), experimental studies are reviewed in a certain chronology that have been mi...
展开
In the work dedicated to the 50th anniversary of the V.E. Zuev Institute of Atmospheric Optics, Siberian Branch, Russian Academy of Sciences (IAO SB RAS), experimental studies are reviewed in a certain chronology that have been milestones in the development of an integrated study of aerosol life in the atmosphere. We discuss briefly the main results from the series of expedition studies of the optical and microphysical properties of aerosol of marine coastal hazes, arid zones, and different geographic regions of the World Ocean. The modern set of methods and instrumentation that we use to measure the aerosol characteristics in the monitoring mode at the network of IAO SB RAS stations is described. The results of multiyear studies of tropospheric aerosol using aircraft laboratories are presented.
收起
摘要 :
The results of experimental and theoretical studies of femtosecond laser pulse filamentation with use of a bimorph deformable mirror are presented. The mirror allows controlling the position of the filamentation domain throughout ...
展开
The results of experimental and theoretical studies of femtosecond laser pulse filamentation with use of a bimorph deformable mirror are presented. The mirror allows controlling the position of the filamentation domain throughout a model path due to phase distortions of different parts of a laser beam, determining localization of filaments and high-intensity channels in a beam cross section, and forming long (>100 m) high-intensity (10_(11)–10_(12)W/cm_(2)) weakly diverging plasma-free channels.
收起
摘要 :
The results of experimental studies of the transverse structure of a laser beam after multiple filamentation are presented. A ring structure of radiation is formed around individual filaments in a beam cross section inside the mul...
展开
The results of experimental studies of the transverse structure of a laser beam after multiple filamentation are presented. A ring structure of radiation is formed around individual filaments in a beam cross section inside the multiple filamentation domain, and at a dozen meters from it a common ring structure starts forming surrounding postfilamentation light channels (PFC). It is shown that the spectra of the PFC, rings, and beam are significantly different. The ring spectrum broadens asymmetrically relative to the carrier wavelength and is mainly concentrated in the short wavelength region. The PFC spectrum has a significant and more symmetrical broadening and covers the range 630–1000 nm.
收起
摘要 :
Data on the vertical distribution of gaseous and aerosol composition of air, measured onboard the Tu-134 Optic airborne laboratory in October 2014 over the Kara Sea and coastal areas of the Russian Arctic, are presented. We reveal...
展开
Data on the vertical distribution of gaseous and aerosol composition of air, measured onboard the Tu-134 Optic airborne laboratory in October 2014 over the Kara Sea and coastal areas of the Russian Arctic, are presented. We revealed the specific features of the altitude distributions of CO~(2)and aerosol over the Kara Sea as compared to continental conditions. No significant deviations from continental distributions are found for CH~(4), CO, and O~(3).
收起
摘要 :
Abstract The results of the modernization of the mobile aerosol Raman lidar LOZA-A2 are presented. Lidar measures purely rotational Raman scattering signals simultaneously with measurements of the vibrational component of spontane...
展开
Abstract The results of the modernization of the mobile aerosol Raman lidar LOZA-A2 are presented. Lidar measures purely rotational Raman scattering signals simultaneously with measurements of the vibrational component of spontaneous Raman scattering of lidar signals. The technique for interpreting Raman lidar sensing data is considered. Data are obtained from simultaneous measurements of vibrational–rotational and purely rotational Raman scattering in atmospheric sensing over the Lake Baikal. The results are presented from retrieving the vertical profiles of the optical characteristics of the atmosphere at a wavelength of 532 nm using these data.
收起
摘要 :
Abstract We present the quantitative estimates of the vertical distribution of absorbed solar radiation and temperature effects in the background and extremely smoke-laden troposphere of Siberia, obtained using empirical data and ...
展开
Abstract We present the quantitative estimates of the vertical distribution of absorbed solar radiation and temperature effects in the background and extremely smoke-laden troposphere of Siberia, obtained using empirical data and numerical simulation. Vertical profiles of the aerosol characteristics are created based on an empirical model, relying on aircraft sensing of angular scattering coefficients and the content of absorbing particles at different altitudes. It is shown that, under the smoke-haze conditions, the radiation effect of aerosol particles with high black carbon content on the diurnal influx of solar radiation in the central part of the smoke layer exceeds 50%. The change in air temperature due to the absorption of solar radiation during the daylight hours is approximately 2.5–5.5 K when the optical depth of the smoke aerosol varies in the range 2 ≤ τ~(smoke)(0.55 μm) ≤ 4.
收起
原文获取