Contents

Geomagnetism and Aeronomy


Vol. 60, No. 8, 2020


Spatial and Temporal Properties of the Solar Cycle from RATAN-600 Microwave Observations

A. V. Shendrik, V. M. Bogod, K. M. Kuzanyan, T. I. Kaltman and E. A. Kurochkin p. 999  abstract

Some Features of the Present-day Transition Period in Solar Activity

V. N. Obridko, A. A. Abunin, K. Georgieva, B. Kirov, B. D. Shelting and I. M. Livshits p. 1007  abstract

Solar Activity Predictability Horizons

D. M. Volobuev and N. G. Makarenko p. 1017  abstract

Anticorrelation of Variations of the Magnetic Field of a Sunspot and the Brightness of Its Umbra in Long-Period Sunspot Oscillations

V. I. Efremov, A. A. Solov’ev, L. D. Parfinenko and I. Zhivanovich p. 1023  abstract

Reconstruction of Heliospheric Modulation Potential Based on Data on the Content of the Cosmogenic Isotope 10Be in Greenland Ice and the Extremes of Solar Activity from the End of the 14th Century

I. V. Kudryavtsev p. 1028  abstract

Estimates of Current Helicity and Tilt of Solar Active Regions and Joy’s Law

K. Kuzanyan, N. Kleeorin, I. Rogachevskii, D. Sokoloff and H. Zhang p. 1032  abstract

Numerical Simulation of Sub-Terahertz Thermal Emission: RADYN Code

A. S. Morgachev, Yu. T. Tsap, V. V. Smirnova, G. G. Motorina and M. Bárta p. 1038  abstract

Observations and Interpretation of Rotational Properties of Polar Coronal Holes Based on SDO Data

V. V. Smirnova, A. Riehokainen, O. A. Korol’kova and I. Zhivanovich p. 1050  abstract

Two Types of Gradual Events: Solar Protons and Relativistic Electrons

A. B. Struminsky, Yu. I. Logachev, I. Yu. Grigorieva and A. M. Sadovski p. 1057  abstract

Coronal Loops and Optical Radiation from Flaring Stars

Yu. T. Tsap, A. V. Stepanov, Yu. G. Kopylova, Z. S. Akhtemov and V. M. Malashchuk p. 1067  abstract

The Influence of the Hydrodynamic Response of the Flare Plasma on the Kinetics of an Accelerated Electron Beam and Hard X-rays

Yu. E. Charikov and A. N. Shabalin p. 1071  abstract

Subsecond X-ray Spikes in Solar Flares: Kinematics of Acceleration and Transport of Accelerated Electrons

A. N. Shabalin, Yu. E. Charikov and V. I. Globina p. 1079  abstract

Observation of the Radio Radiation Flux of the Sun and Flares at a Wavelength of 5 cm

A. G. Tlatov, V. M. Bogod, O. Pons, M. Rodriges, R. Estrada and S. Pablo p. 1087  abstract

Sunspot Activity and Coronal Holes during the Declining Phase of Cycle 24

O. A. Andreeva and V. M. Malashchuk p. 1093  abstract

Magnetohydrodynamic Simulation of Preflare Situations in the Solar Corona with the Use of Parallel Computing

A. V. Borisenko, I. M. Podgorny and A. I. Podgorny p. 1101  abstract

Search for the Relationship between the Velocity of a Coronal Mass Ejection and the Decay Rate of the Magnetic Field in the Region of Mass Emission Generation

Yu. S. Zagainova, V. G. Fainshtein and G. V. Rudenko p. 1114  abstract

Influence of the Angular Distribution of Langmuir Waves on the Directivity of Radio Emission at Double Plasma Frequency

I. V. Kudryavtsev and T. I. Kaltman p. 1122  abstract

Conditions for Whistler Generation by Nonthermal Electrons in Flare Loops

V. F. Melnikov and L. V. Filatov p. 1126  abstract

Kink Oscillations of Coronal Loops with a Longitudinal Electric Current

B. B. Mikhalyaev, N. K. Shividov, S. B. Derteev and L. N. Dzhimbeeva p. 1132  abstract

Microwave Emission of a Flare Loop in the Presence of Whistler Turbulence

L. V. Filatov and V. F. Melnikov p. 1137  abstract

Manifestation of Solar-Activity Cycles in the Rhythms of the Lacustrine Banded Clay of the Late Pleistocene and the Modern Era

P. B. Dmitriev, V. A. Dergachev and M. I. Tyasto p. 1146  abstract

Winter North Atlantic Oscillations Driven by Variations in Total Solar Irradiance

V. Gorshkov and Y. Chapanov p. 1152  abstract

Indications of Changing Solar Activity and North Atlantic Sea Surface Temperature in Fennoscandian Climate

M. G. Ogurtsov and H. Jungner p. 1159  abstract

Dynamics of the Annual Variation in the Climate Variables of the Earth’s Atmosphere and Their Relation to Solar Activity

A. P. Kramynin and I. V. Kuz’menko p. 1164  abstract

Analysis of Past Temperature Changes in Ice Layers and the Ocean Based on the Ratios of Argon, Krypton, and Xenon with Nitrogen

V. A. Dergachev p. 1171  abstract

Climate Oscillations in Southern Bulgaria and Solar Activity: Analysis of Annual Rings of Needle Samples

B. Komitov and V. Kaftan p. 1180  abstract