Structure of solar-wind streams at the maximum of solar cycle 23     

N. A. Lotova  K. V. Vladimirskii  V. N. Obridko  B. P. Filippov  O. A. Korelov 《Astronomy Letters》2005,31(8):546-556

We study the formation of solar-wind streams in the years of maximum solar activity 2000–2002. We use observations of the scattering of radio emission by solar-wind streams at distances of ～4–60R_S from the Sun, data on the magnetic field structure and strength in the source region (R ～ 2.5R_S), and observations with the LASCO coronagraph onboard the SOHO spacecraft. Analysis of these data allowed us to investigate the changes in the structure of circumsolar plasma streams during the solar maximum. We constructed radio maps of the solar-wind transition, transonic region in which the heliolatitudinal stream structure is compared with the structure of the white-light corona. We show that the heliolatitudinal structure of the white-light corona largely determines the structure of the solar-wind transition region. We analyze the correlation between the location of the inner boundary of the transition region R_in and the magnetic field strength on the source surface |B_R|. We discuss the peculiarities of the R_in = F(|B_R|) correlation diagrams that distinguish them from similar diagrams at previous phases of the solar cycle.  相似文献   

Energy Spectra of Cosmic-Ray Protons and Nuclei Measured in the NUCLEON Experiment Using a New Method     

Atkin  E. V.  Bulatov  V.L.  Vasiliev  O. A.  Voronin  A. G.  Gorbunov  N. V.  Grebenyuk  V. M.  Dorokhov  V. A.  Karmanov  D. E.  Kovalev  I.M.  Kudryashov  I. A.  Kurganov  A.A.  Merkin  M. M.  Panov  A.D.  Podorozhny  D. M.  Polkov  D. A.  Porokhovoi  S. Yu.  Sveshnikova  L. G.  Tkachev  L.G.  Tkachenko  A. V.  Turundaevskiy  A. N.  Filippov  S. B.  Shumikhin  V. V. 《Astronomy Reports》2019,63(1):66-78

Astronomy Reports - Some results of studies of cosmic rays obtained during the NUCLEON space experiment in 2015–2017 are presented. This experiment was intended for direct measurements of the...  相似文献   

Determining Both Tropospheric and Stratospheric СО2 Contents Using a Ground-Based IR Spectroscopic Method     

Timofeyev  Yu. M.  Nerobelov  G. M.  Poberovskii  A. V.  Filippov  N. N. 《Izvestiya Atmospheric and Oceanic Physics》2021,57(3):286-296

Izvestiya, Atmospheric and Oceanic Physics - Results obtained from ground-based high spectral resolution measurements of solar IR radiation absorption spectra are analyzed. These measurements have...  相似文献   

Radiosounding of the High-Latitude Ionosphere with the <Emphasis Type="Italic">Arktika-M</Emphasis> Hydrometeorological Complex     

N. P. Danilkin  S. V. Zhuravlev  N. G. Kotonaeva  V. B. Lapshin  I. V. Romanov  M. Y. Filippov  E. N. Khotenko  G. A. Zhbankov 《Solar System Research》2018,52(7):684-690

The satellite ionosondes in highly elliptical orbits are proposed to be used for the task of continuous monitoring of the Arctic ionosphere. The monitoring scheme with the ionosonde location aboard the Arktika-M satellites is presented. The calculations of the vertical topside and transionospheric sounding using the SIMP1 ionospheric model are performed, which show the feasibility of continuous monitoring.  相似文献   

The choice of oil-pollution criteria for organogenic bottom sediments by chromatography-mass-spectrometry     

M. G. Kul’kov  E. A. Zarov  I. V. Filippov 《Water Resources》2017,44(2):267-275

The results of studying the hydrocarbon composition of organogenic bottom sediments of oil-polluted lakes and lakes of similar types remote from centers of anthropogenic activity are given. To correctly assess the oil pollution of organogenic materials one has to take into account the presence of native hydrocarbons in their composition and to choose the main criterion of oil pollution based on the presence of specific oil components not characteristic of aquatic ecosystems in their natural state. The most promising among such components are alkylbenzenes С₁₅–С₂₅, which slowly degrade under the conditions typical of northern aquatic ecosystems and can be retained for a long time by organogenic matrix.  相似文献   

Geodynamic Model of the Neoproterozoic Evolution of the Yenisei Paleosubduction Zone (Western Margin of the Siberian Craton), Russia     

Kozlov  P. S.  Filippov  Yu. F.  Likhanov  I. I.  Nozhkin  A. D. 《Geotectonics》2020,54(1):54-67

Geotectonics - The article proposes a model of collisional and accretionary events of the Neoproterozoic at the western margin of the Siberian Craton based on the results of geological,...  相似文献   

Estimation of Solar Activity Based on VHF Radar Data     

Filippov  M. Yu.  Abunin  A. A.  Khodataev  N. A. 《Geomagnetism and Aeronomy》2019,59(7):950-954

Geomagnetism and Aeronomy - The index of integral solar activity F10.7 is one of the main input parameters of existing ionospheric models, including the model used at early-warning radar stations...  相似文献   

Accuracy estimates for some global analytical models of the Earth’s main magnetic field on the basis of data on gradient magnetic surveys at stratospheric balloons     

Yu. P. Tsvetkov  O. M. Brekhov  T. N. Bondar  S. V. Filippov  V. G. Petrov  N. M. Tsvetkova  A. Kh. Frunze 《Geomagnetism and Aeronomy》2014,54(2):263-268

Two global analytical models of the main magnetic field of the Earth (MFE) have been used to determine their potential in deriving an anomalous MFE from balloon magnetic surveys conducted at altitudes of ～30 km. The daily mean spherical harmonic model (DMSHM) constructed from satellite data on the day of balloon magnetic surveys was analyzed. This model for the day of magnetic surveys was shown to be almost free of errors associated with secular variations and can be recommended for deriving an anomalous MFE. The error of the enhanced magnetic model (EMM) was estimated depending on the number of harmonics used in the model. The model limited by the first 13 harmonics was shown to be able to lead to errors in the main MFE of around 15 nT. The EMM developed to n = m = 720 and constructed on the basis of satellite and ground-based magnetic data fails to adequately simulate the anomalous MFE at altitudes of 30 km. To construct a representative model developed to m = n = 720, ground-based magnetic data should be replaced by data of balloon magnetic surveys for altitudes of ～30 km. The results of investigations were confirmed by a balloon experiment conducted by Pushkov Institute of Terrestrial Magnetism, Ionosphere, and Radio Wave Propagation of the Russian Academy of Sciences and the Moscow Aviation Institute.  相似文献   

Condensation of water vapor and carbon dioxide in the jet exhausts of rocket engines: 1. Heterogeneous condensation of combustion products     

Yu. V. Platov  A. I. Semenov  B. V. Filippov 《Geomagnetism and Aeronomy》2014,54(1):104-108

Condensation of water vapor and carbon dioxide in the jet exhausts of rocket engines during last stages of Proton, Molniya, and Start launchers operating in the upper atmospheric with different types of fuels is considered. Particle heating is taken into account with emission of latent heat of condensation and energy loss due to radiation and heat exchange with combustion products. Using the solution of the heat balance and condensed particle mass equations, the temporal change in the temperature and thickness of the condensate layer is obtained. Practically, no condensation of water vapor and carbon dioxide in the jet exhaust of a Start launcher occurs. In plumes of Proton and Molniya launchers, the condensation of water vapor and carbon dioxide can start at distances of 120–170 m and 450–650 m from the engine nozzle, respectively. In the course of condensation, the thickness of the “water” layer on particles can exceed 100 Å, and the thickness of carbon dioxide can exceed 60 Å.  相似文献   

Peculiarities of the rare-earth element distribution in the modern bottom sediments of the White Sea and the lower reaches of the Severnaya Dvina River     

A. V. Maslov  V. P. Shevchenko  Yu. L. Ronkin  O. P. Lepikhina  A. N. Novigatsky  A. S. Filippov  N. V. Shevchenko 《Oceanology》2013,53(6):702-714

The study of the rare-earth element (REE) systematics in the modern bottom sediments of the White Sea and the lower reaches of the Severnaya Dvina River showed that they were derived by the simple mixing of the detrital material from two geochemically contrasting provenances: the Kola-Karelian geoblock almost completely consisting of Archean rocks and the northwestern Mezen syneclise made up of the Upper Vendian, Paleozoic, and Mesozoic rocks. This is best manifested by the changes in ?_Nd(0). In terms of the Gd_N/Yb_N and Eu/Eu*, most of the studied samples are comparable with the Post-Archean craton complexes, some of which resemble the average composition of the Archean mudstone. Based on the ΣREE and La_N/Yb_N, the modern bottom sediments are subdivided into two groups: (1) those close to basalts and granites and (2) those approximating common sedimentary rocks. From the lower reaches of the Pinega River to the Tersky coast, the maximal average (La/Yb)_RPSC, (Gd/Yb)_RPSC, La_N/Yb_N, and Gd_N/Yb_N ratios were determined in the samples taken at the boundary of Dvina Bay with the Basin, i.e., in the sediments with the highest content of the pelitic component. In general, the geochemical composition of the modern bottom sediments of almost the entire White Sea area was defined by input of the eroded products of the mature continental crust with the Severnaya Dvina River, the main river of the region. Such a setting, when the formation of the sediments in a peri- or intracontinental marine basin is controlled by one large river system, presumably may be propagated to the sedimentation in the Laptev Sea, the eastern Kara Sea, the Bay of Bengal, and other basins.  相似文献