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Turbulence is a prevalent phenomenon in space and astrophysical plasmas, often characterized by stochastic fluctuations. While laboratory experiments and numerical simulations have revealed chaotic behavior, in-situ observations of…

The earliest stage of the evolution of a fully assembled planet is profoundly affected by a number of basin-forming impacts large enough to change the dynamics of its deeper interior. These impacts are in some cases quite closely spaced and…

地球与行星天体物理 · 物理学 2019-01-29 Thomas Ruedas , Doris Breuer

Geomagnetic field reversals remain as one of the most intriguing problems in geophysics and are regarded as chaotic processes resulting from a dynamo mechanism. In this article, we use the polarity scale data set for the last 170 Myr from…

Using models of the Earth's core evolution and the length of the day observations the change of the dimensionless geodynamo parameters is considered. The evolutionary model includes cooling of the liquid adiabatic core, growing solid core,…

地球物理 · 物理学 2019-05-31 M. Yu. Reshetnyak

Data obtained over the last three solar cycles have been analysed to reveal the relationships between the intensity of the photospheric field measured along the line of sight by the WSO group at heliolatitudes from -75 to 75 degrees and the…

地球物理 · 物理学 2018-02-14 E. A. Gavryuseva

Paleoclimate data help us assess climate sensitivity and potential human-made climate effects. We conclude that Earth in the warmest interglacial periods of the past million years was less than 1{\deg}C warmer than in the Holocene. Polar…

大气与海洋物理 · 物理学 2012-09-12 James E. Hansen , Makiko Sato

Evolving magnetic fields are frequently embedded in plasmas that are turbulent. When the primary interest is in effects that are on a large scale compared to that of the turbulence, it is desirable to average over the turbulence to obtain…

等离子体物理 · 物理学 2025-04-08 Allen H Boozer

The explanation of the observed galactic magnetic fields may require the existence of a primordial magnetic field. Such a field may arise during the early cosmological phase transitions, or because of other particle physics related…

天体物理学 · 物理学 2009-10-30 Kari Enqvist

Solar flares occur due to the sudden release of energy stored in active-region magnetic fields. To date, the pre-cursors to flaring are still not fully understood, although there is evidence that flaring is related to changes in the…

太阳与恒星天体物理 · 物理学 2012-02-01 Sophie A. Murray , D. Shaun Bloomfield , Peter T. Gallagher

A correlative study between the geomagnetic indices and the peak values of various plasma and field parameters during rising, maximum and decay phases as well as during complete solar cycle 23 have been presented. We have also presented the…

太阳与恒星天体物理 · 物理学 2010-03-16 Navin Chandra Joshi , Neeraj Singh Bankoti , Seema Pande , Bimal Pande , Kavita Pandey

Magnetic fields emerging from the Sun's interior carry information about physical processes of magnetic field generation and transport in the convection zone. Soon after appearance on the solar surface the magnetic flux gets concentrated in…

太阳与恒星天体物理 · 物理学 2009-11-13 A. G. Kosovichev

We investigate spatio-temporal evolution of high-degree acoustic mode frequencies of the Sun and the surface magnetic activity, over the course of multiple solar cycles, to improve our understanding of the connection between the solar…

太阳与恒星天体物理 · 物理学 2023-12-20 Mackenzie A. Baird , Sushanta C. Tripathy , Kiran Jain

The magnetospheres of the outer planets exhibit turbulent phenomena in an environment which is qualitatively different compared to the solar wind or the interstellar medium. The key differences are the finite sizes of the magnetospheres…

地球与行星天体物理 · 物理学 2021-04-27 Joachim Saur

We study how the presence of a background magnetic field, of intensity compatible with current observation constraints, affects the linear evolution of cosmological density perturbations at scales below the Hubble radius. The magnetic field…

宇宙学与河外天体物理 · 物理学 2012-11-22 Massimiliano Lattanzi , Nakia Carlevaro , Giovanni Montani

The correlation between geomagnetic activity and the sunspot number in the 11-year solar cycle exhibits long-term variations due to the varying time lag between the sunspot-related and non-sunspot related geomagnetic activity, and the…

太阳与恒星天体物理 · 物理学 2015-05-18 Katya Georgieva , Boian Kirov

We present an analysis of the global-integrated mid-infrared emission flux of the Earth based on data derived from satellite measurements. We have studied the photometric annual, seasonal, and rotational variability of the thermal emission…

地球与行星天体物理 · 物理学 2015-06-05 I. Gómez-Leal , E. Pallé , F. Selsis

The review presents analysis and physical interpretation of available statistical data about solar wind plasma and interplanetary magnetic field (IMF) properties as measured in-situ at 1 A.U. by numerous space experiments during time period…

空间物理 · 物理学 2013-01-15 A. V. Dmitriev , A. V. Suvorova , I. S. Veselovsky

Violent gravitational interactions can change the morphologies of galaxies and, by means of merging, transform them into elliptical galaxies. We aim to investigate how they affect the evolution of galactic magnetic fields. We selected 16…

宇宙学与河外天体物理 · 物理学 2011-09-23 Robert T. Drzazga , Krzysztof T. Chyzy , Wojciech Jurusik , Krzysztof Wiorkiewicz

Light volatile elements in lunar regolith are thought to be a mixture of the solar wind and Earth's atmosphere, the latter sourced in the absence of geomagnetic field. However, the extent to which both the current and primitive geodynamo…

地球与行星天体物理 · 物理学 2024-12-03 Shubhonkar Paramanick , Eric G. Blackman , John A. Tarduno , Jonathan Carroll-Nellenback

The sun as an oscillator produces frequencies which propagate in the heliosphere, via solar wind, to the terrestrial magnetosphere. We searched for those frequencies in the parameters of the near Earth solar plasma and the geomagnetic…

太阳与恒星天体物理 · 物理学 2016-11-11 Ch. Katsavrias , P. Preka-Papadema , X. Moussas