scholarly journals Geophysical interpretation of observed geocenter variations

1999 ◽  
Vol 104 (B2) ◽  
pp. 2683-2690 ◽  
Author(s):  
J. L. Chen ◽  
C. R. Wilson ◽  
R. J. Eanes ◽  
R. S. Nerem
Keyword(s):  
Geophysical Interpretation ◽  
Geocenter Variations

scholarly journals Ionospheric electron content: the European perspective

1998 ◽  
Vol 41 (5-6) ◽  
Author(s):  
R. Leitinger
Keyword(s):  
Working Party ◽  
Artificial Satellites ◽  
Electron Content ◽  
European Perspective ◽  
Radio Science ◽  
Geophysical Interpretation ◽  
Propagation Effects ◽  
Ionospheric Electron Content ◽  
Radio Signals ◽  
The University

The electron content of the ionosphere is an important quantity which indicates overall ionization. It is measured by means of propagation effects on radio signals which penetrate the ionosphere. In Europe relevant investigations started after the launch of the first artificial satellites. Soon the necessity arose to organize international cooperation: the regional as well as the global geographical distribution of ionization parameters is important knowledge for any meaningful geophysical interpretation of ionization parameters. Despite the fact that international scientific Unions and Committees existed and had proven their usefulness and potential, private initiatives were taken to organize cooperation in the field of research based on transionospheric propagation effects. Only in 1971 three international groups joined together to form the "Beacon Satellite Group"as a "Working Party" of COSPAR. The "Beacon Satellite Group" still exists but is now a Working Group of URSI, the International Union for Radio Science. This contribution tries to summarize the European perspective with special emphasis on the long standing cooperation between the Istituto di Ricerca sulle Onde Elettromagnetiche (IROE) at Firenze and the Institut für Meteorologie und Geophysik of the University of Graz. Examples are given of important results.

scholarly journals Seasonal and Decadal Variability of Atmosphere Pressure in Arctic, its Statistical and Temporal Analysis

2021 ◽  
Vol 24 (1) ◽  
pp. 57-73
Author(s):  
Константин Павлович Беляев ◽  
Гурий Михайлович Михайлов ◽  
Алексей Николаевич Сальников ◽  
Наталия Павловна Тучкова
Keyword(s):  
Decadal Variability ◽  
Diffusion Processes ◽  
Arctic Region ◽  
Temporal Analysis ◽  
The Arctic ◽  
State University ◽  
Main Research ◽  
Geophysical Interpretation ◽  
The Given

The paper analyzes the statistical and temporal seasonal and decadal variability of the atmospheric pressure field in the Arctic region of Russia. Schemes for the frequency analysis of probability transitions for characteristics of stochastic-diffusion processes were used as the main research method. On the basis of the given series of 60 years long from 1948 to 2008, such parameters of diffusion processes as the mean (drift process) and variance (diffusion process) were calculated and their maps and time curves were constructed. The seasonal and long-term variability of calculated fields was studied as well as their dependencies on a discretization of the frequency intervals. These characteristics were analyzed and their geophysical interpretation was carried out. In particular, the known cycles of solar activity in 11 and 22 years were revealed. Numerical calculations were performed on the Lomonosov-2 supercomputer of the Lomonosov Moscow State University.

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