Vol. 60, No. 8, 2020

Geomagnetism and Aeronomy

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

Contents

Geomagnetism and Aeronomy