Density Structure of the Lithosphere of the Sikhote-Alin Orogenic Belt     

Didenko  A. N.  Nosyrev  M. Yu. 《Doklady Earth Sciences》2020,492(2):446-450

Doklady Earth Sciences - For the first time, a detailed density 3D model of the lithosphere of the Sikhote-Alin orogenic belt to a depth of 130 km has been created. Two extended submeridional...  相似文献   

Restructuring of the Solar Magnetic Fields and Flare Activity Centers in Cycle 24     

A. V. Borovik  A. V. Mordvinov  E. M. Golubeva  A. A. Zhdanov 《Astronomy Reports》2020,64(6):540-546

The development of the solar magnetic activity in cycle 24 has been analyzed. It has been shown that the significant north–south asymmetry of magnetic activity was accompanied by the asynchronous reorganization of solar magnetic fields in the northern and southern hemispheres. The formation of unipolar magnetic regions after the decay of activity centers has been studied. The meridional transport of unipolar magnetic regions leading to changes in the zonal structure of the solar magnetic field has been shown. Long-lived centers of flare activity have been found to exist during the periods of magnetic field restructuring. The spatiotemporal analysis of the flare ensemble making it possible to diagnose non-stationary processes in the solar atmosphere has been shown.  相似文献   

Silurian Granitoid Magmatism of the Rassokha Terrane (North-East Russia)     

Sychev  S. N.  Khudoley  A. K.  Lebedeva  O. Yu.  Rogov  A. V.  Sokolov  S. D.  Chamberlain  K. R.  Maklashin  V. S.  Lvov  P. A. 《Doklady Earth Sciences》2020,494(2):762-766

Doklady Earth Sciences - U–Pb dating of zircons from granitoids located within the Rassokha terrane show a Silurian age of their formation. Younger dates from one of the samples are related...  相似文献   

Impact of COVID-19 Lockdown on Air Quality in Moscow     

Ginzburg  A. S.  Semenov  V. A.  Semutnikova  E. G.  Aleshina  M. A.  Zakharova  P. V.  Lezina  E. A. 《Doklady Earth Sciences》2020,495(1):862-866

Doklady Earth Sciences - The results of an analysis of changes in the atmospheric air quality in Moscow during the lockdown period and the decline in business activity caused by the COVID-19...  相似文献   

Implementation of the Concept for Creating a Spacecraft Double-Launch System as a Part of the Upper Stages of the Fregat Family     

Ishin  S. V.  Vikulenkov  V. P.  Fedoskin  D. I.  Poreshnev  A. Yu.  Jumahanov  N. B.  Yakovlev  B. D. 《Solar System Research》2020,54(7):690-698

Solar System Research - Abstract—Results of the implementation of a single concept for the development of the double launch system (SDZ) are presented, in particular the SDZ-La5 for the...  相似文献   

Detection of Asteroid Impact Orbits Using Conditional Minimization of the Distance to the Earth     

Baturin  A. P. 《Solar System Research》2020,54(6):550-556

Solar System Research - A method has been developed for detecting impact orbits of asteroids in the confidence ellipsoid of the initial parameters of motion. The method consists in conditionally...  相似文献   

The Numerical Simulation of Aerodynamics of the Frontal Aerodynamic Screen of ExoMars Project Descent Vehicle and the Analysis of Flow Pattern in the Base Area and Near Wake     

Babakov  A. V.  Finchenko  V. S. 《Solar System Research》2020,54(7):712-718

Solar System Research - Results of the numerical study of the flow past the frontal aerodynamic screen of the descent vehicle of the ExoMars project, the determination of aerodynamic...  相似文献   

Optical Spectroscopy of SRG/eROSITA Objects with 2.5-m Telescope at the Caucasus Mountain Observatory of the SAI MSU     

Dodin  A. V.  Potanin  S. A.  Shatsky  N. I.  Belinski  A. A.  Atapin  K. E.  Burlak  M. A.  Egorov  O. V.  Tatarnikov  A. M.  Postnov  K. A.  Belvedersky  M. I.  Burenin  R. A.  Gilfanov  M. R.  Medvedev  P. S.  Meshcheryakov  A. V.  Sazonov  S. Yu.  Khorunzhev  G. A.  Sunyaev  R. A. 《Astronomy Letters》2020,46(7):429-438

Astronomy Letters - Based on observations with the new transient double-beam spectrograph (TDS) at the 2.5-m telescope of the Caucasus Mountain Observatory of SAI MSU, we have determined the types...  相似文献   

LA‐ICP‐MS Pb isotope test of meteorite provenance: A terrestrial origin for Lovina     

Christopher R. J. Charles  Phil J. A. McCausland  Donald W. Davis 《Meteoritics & planetary science》2020,55(5):1093-1102

Lovina, classified as an ungrouped ataxite, is controversial and its identity as a meteorite has been questioned. In this work, we use Pb isotopes on targeted troilite nodules in Lovina as a test of its antiquity and provenance. Although precise ages cannot be obtained, LA‐ICP‐MS offers a rapid, straightforward procedure to establish the source of lead, whether ancient (meteoritic) or modern (terrestrial). For nine pristine, unweathered nodules in Lovina, we find a lead isotopic composition of: ²⁰⁶Pb/²⁰⁸Pb = 0.492 ± 0.003 (2σ, MSWD 0.79; 95%) and ²⁰⁷Pb/²⁰⁶Pb = 0.852 ± 0.003 (2σ, MSWD 1.09; 95%) with no detectable uranium. All lead compositions of the troilite fall in the range expected for modern environmental and mantle lead and are distinctly different from the primordial Canyon Diablo Troilite (CDT) composition of ancient meteoritic troilite. Although the origin of Lovina remains unknown, we conclude that lead in the Lovina troilite is unsupported by U decay and originated from a terrestrial source.  相似文献   

Cognitive and Affective Predictors of Illinois Residents’ Perceived Risks from Gray Wolves     

Adam C. Landon  Maarten H. Jacobs  Craig A. Miller  Jerry J. Vaske  Brent D. Williams 《社会与自然资源》2020,33(5):574-593

Abstract

Increasing wolf populations are a concern for wildlife managers in the Midwestern U.S. Understanding the psychological mechanisms that contribute to public perceptions of risk will enable development of strategies that seek to mitigate these risks, and suggest where outreach efforts may facilitate acceptance of wolves. We examined the psychological factors that influence Illinois residents’ perceived risks from wolves. We hypothesized that individuals’ perceived risks from wolves were a function of their attitudes toward wolves, negative affect toward wolves, and basic beliefs about wildlife. Data were obtained from a survey of the Illinois public (n?=?784). Negative affect and attitudes toward wolves were direct predictors of perceived risks. Basic beliefs predicted attitudes and negative affect toward wolves. Negative affect predicted attitudes. Basic beliefs had direct and indirect effects on perceived risks.  相似文献