The Siberian Solar Radio Telescope: the current state of the instrument,observations, and data   总被引：2，自引：0，他引：2  

Grechnev  V.V.  Lesovoi  S.V.  Smolkov  G. Ya.  Krissinel  B.B.  Zandanov  V.G.  Altyntsev  A.T.  Kardapolova  N.N.  Sergeev  R.Y.  Uralov  A.M.  Maksimov  V.P.  Lubyshev  B.I. 《Solar physics》2003,216(1-2):239-272

The Siberian Solar Radio Telescope (SSRT) is one of the world's largest solar radio heliographs. It commenced operation in 1983, and since then has undergone several upgrades. The operating frequency of the SSRT is 5.7 GHz. Since 1992 the instrument has had the capability to make one-dimensional scans with a high time resolution of 56 ms and an angular resolution of 15 arc sec. Making one of these scans now takes 14 ms. In 1996 the capability was added to make full, two-dimensional images of the solar disk. The SSRT is now capable of obtaining images with an angular resolution of 21 arc sec every 2 min. In this paper we describe the main features and operation of the instrument, particularly emphasizing issues pertaining to the imaging process and factors limiting data quality. Some of the data processing and analysis techniques are discussed. We present examples of full-disk solar images of the quiet Sun, recorded near solar activity minimum, and images of specific structures: plages, coronal bright points, filaments and prominences, and coronal holes. We also present some observations of dynamic phenomena, such as eruptive prominences and solar flares, which illustrate the high-time-resolution observations that can be done with this instrument. We compare SSRT observations at 5.7 GHz, including computed `light curves', both morphologically and quantatively, with observations made in other spectral domains, such as 17 GHz radio images, Hα filtergrams and magnetograms, extreme-ultraviolet and X-ray observations, and dynamic radio spectra.  相似文献   

New outcrop of buried Kazantsevo peat at lower reaches of the Irtysh River     

S. A. Laukhin  Kh. A. Arslanov  F. E. Maksimov  V. Yu. Kuznetsov  G. N. Shilova  F. Yu. Velichkevich  S. B. Chernov  Ya. A. Nikonorov 《Doklady Earth Sciences》2008,419(2):200-204

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Geochronology and landscape-climatic environments of the Early Zyryanian Interstadial in West Siberia     

S. A. Laukhin  F. E. Maksimov  Kh. A. Arslanov  V. Yu. Kuznetsov  S. B. Chernov  G. N. Shilova  F. Yu. Velichkevich 《Doklady Earth Sciences》2008,421(1):796-799

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Late Quaternary marine terraces in the Mediterranean coastal area of Syria: Geochronology and neotectonics     

A.E. Dodonov  V.G. Trifonov  T.P. Ivanova  V.Yu. Kuznetsov  F.E. Maksimov  D.M. Bachmanov  T.A. Sadchikova  A.N. Simakova  H. Minini  A.-M. Al-Kafri  O. Ali 《Quaternary International》2008,190(1):158

In order to provide new data on the neotectonics and geodynamic properties of western Syria, studies of marine terraces have been carried out. The most attention was paid to the lower terraces in the range of 3–5 to 30–35 m above sea level, because they have more complete distributions along the shore. The lower terraces were examined along the coastal area from Tartus to Latakia, and along the carbonate cliff on Arwad Island. Seven ²³⁰Th/U dates for these terraces are in the range of 85–130 ka, suggesting the age interval of the last interglacial (MIS 5). New dates on the lower terraces provide a basis for stratigraphical and geomorphological interpretation as well as neotectonic reconstruction. According to the geomorphological data and lithological composition of those terraces, two main uplifted blocks can be established. One coincides with the Latakia block, and another corresponds to the western margin of the Banias volcanic plateau. These blocks are divided by a subsided structure corresponding to the Nahr el Kebir graben. The amplitude of neotectonic uplifting in the Latakia and Banias blocks reaches 15–20 m for the Late Pleistocene.  相似文献   

Diamonds in the products of the 2012–2013 Tolbachik eruption (Kamchatka) and mechanism of their formation     

E. M. Galimov  G. A. Karpov  V. S. Sevast’yanov  S. N. Shilobreeva  A. P. Maksimov 《Geochemistry International》2016,54(10):829-833

The origin of diamonds in the lava and ash of the recent Tolbachik eruption of 2012–2013 (Kamchatka) is enigmatic. The mineralogy of the host rocks provides no evidence for the existence of the high pressure that is necessary for diamond formation. The analysis of carbon isotope systematics showed a similarity between the diamonds and dispersed carbon from the Tolbachik lava, which could serve as a primary material for diamond synthesis. There are grounds to believe that the formation of Tolbachik diamonds was related to fluid dynamics. Based on the obtained results, it was suggested that Tolbachik microdiamonds were formed as a result of cavitation during the rapid movement of volcanic fluid. The possibility of cavitation-induced diamond formation was previously theoretically substantiated by us and confirmed experimentally. During cavitation, ultrahigh pressure is generated locally (in collapsing bubbles), while the external pressure is not critical for diamond synthesis. The conditions of the occurrence of cavitation are rather common in geologic processes. Therefore, microdiamonds of such an origin may be much more abundant in nature than was supposed previously.  相似文献   

Geological and Isotope–Geochemical Criteria for the Existence of the Ancient Continental Crust in Basement Complexes of Primorye     

S. O. Maksimov  V. G. Sakhno 《Doklady Earth Sciences》2018,478(1):36-42

The problem of the development of the ancient continental crust in the Primorye Region is discussed. It is substantiated by geological and isotope-geochemical criteria: a granite–metamorphic mineral composition of different-aged terrigenous deposits and pelagic cherts, occurrence of arkoses, as well as Proterozoic model age datings of sedimentary complexes and the occurrence of early Proterozoic zircons and monazites. The manifestation of potassium, high-Ba, LREE- and Nb-rich basite–ultrabasite magmatism, typical of Sino-Korean and Okhotsk Ba-bearing nuclears, of lengthy age intervals (Jurassic–Paleogene) in Primorye and the Amur Region is an important criterion.  相似文献   

<Superscript>230</Superscript>Th/U Chronology and Geochemistry of Irinovskoe Hydrothermal Field (Mid-Atlantic Ridge)     

V. Yu. Kuznetsov  E. V. Tabuns  G. A. Cherkashev  V. E. Bel’tenev  F. E. Maksimov  K. A. Kuksa  L. I. Lazareva  S. B. Levchenkoa  I. E. Zherebtsov 《Doklady Earth Sciences》2018,478(1):26-30

The results of ²³⁰Th/U dating and mineralogical–geochemical studies of sulfide ores from the Irinovskoe hydrothermal field and the Severo-Zapadnoe ore occurrence (Mid-Atlantic Ridge) are presented. Sulfides are represented primarily by copper–sulfide ores with 12–30% Cu content; sulfur- and zinc-sulfide ores are distributed less frequently. The analysis of a change in the composition of sulfides over time has made it possible to identify three stages of formation. Each stage assumes that mineral associations are changed from high-temperature (sulfur and copper sulfide) to medium temperature (Zn–Cu and Zn-sulfide) sulfide ores. The whole age range of formation of the hydrothermal deposits falls within the time interval of about 58000–8000 for the Irinovskoe field and 69000–11000 years ago for the Severo-Zapadnoe ore occurrence.  相似文献   

Obtaining of information about the IMF evolution from an analysis of the geomagnetic field data     

N. Ya. Maksimov 《Geomagnetism and Aeronomy》2006,46(5):635-637

A comparison of the time variations in the geomagnetic field characteristics (the u and aa indices of geomagnetic activity) with the variation in the solar magnetic dipole inclination shows close agreement between these variations. The linear correlation coefficients between the u and aa indices, the u index and solar magnetic dipole inclination, and the aa index and solar magnetic dipole inclination are 0.93, 0.45, and 0.49, respectively. This makes it possible to extend studying the IMF evolution in the 11-year cycle of solar activity to the 170-year period beginning from 1835. It has been indicated that the time variation in the heliospheric current sheet (HCS) surface deviation from the solar magnetic equator plane, calculated based on the actual HCS configuration, is in good agreement with the time variation in the amplitude of the Fourier series second harmonics in a harmonic analysis of the series of daily data on the IMF sign in the vicinity of the Earth. The linear correlation coefficient is 0.9 in this case.  相似文献   

Middle Pleistocene warming phase based on the deposits of a buried oyster reef,Southern Lesser Kuril Islands     

N. G. Razjigaeva  L. A. Ganzey  T. A. Grebennikova  N. I. Belyanina  A. M. Lebedev  F. E. Maksimov  V. Yu. Kuznetsov 《Doklady Earth Sciences》2014,455(2):376-382

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A Record of Humidity Changes in Sections of a Valley Peatbog in the Southern Part of the Far East     

Razzhigaeva  N. G.  Kopoteva  T. A.  Makarova  T. R.  Grebennikova  T. A.  Lyashchevskaya  M. S.  Mokhova  L. M.  Ganzey  L. A.  Kudryavtseva  E. P.  Panichev  A. M.  Klimin  M. A.  Arslanov  Kh. A.  Maksimov  F. E.  Petrov  A. Yu. 《Doklady Earth Sciences》2023,507(1):S69-S80

Doklady Earth Sciences - Comprehensive study of sections of mares in the Bolshaya Ussurka River basin has allowed highlighting climate changes over the past 2900 years. Reconstructions are based on...  相似文献