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Turbulence in space plasmas: Who needs it?

Matthaeus, W. H.

The complex nonlinear dynamical phenomenon described as turbulence, is known to have a great impact on fluids, magnetohydrodynamic systems, and on plasmas. This paper reviews selected topics on turbulence in these systems, emphasizing the multiscale space-time properties of the turbulence cascade as it transfers energy from large scale reservoirs,…

Anisotropy of Solar Wind Turbulence in the Inner Heliosphere at Kinetic Scales: PSP Observations

Chen, Christopher H. K.; He, Jiansen; Bale, Stuart D. +5 more

The anisotropy of solar wind turbulence is a critical issue in understanding the physics of energy transfer between scales and energy conversion between fields and particles in the heliosphere. Using the measurement of Parker Solar Probe (PSP), we present an observation of the anisotropy at kinetic scales in the slow, Alfvénic, solar wind in the i…

The Location of Magnetic Reconnection at Earth's Magnetopause

Fuselier, S. A.; Trattner, K. J.; Petrinec, S. M.

One of the major questions about magnetic reconnection is how specific solar wind and interplanetary magnetic field conditions influence where reconnection occurs at the Earth's magnetopause. There are two reconnection scenarios discussed in the literature: a) anti-parallel reconnection and b) component reconnection. Early spacecraft observations …

The impact of cold electrons and cold ions in magnetospheric physics

Delzanno, Gian Luca; Borovsky, Joseph E.; Henderson, Michael G. +3 more

A review of the impact of the cold-ion and cold-electron populations in the Earth's magnetosphere is presented. The cold populations are defined by total energy less than approximately 100 eV, i.e. in the energy range which is strongly affected by spacecraft charging and that often dominates the total plasma density. We also include the warm plasm…

Impacts of Ionospheric Ions on Magnetic Reconnection and Earth's Magnetosphere Dynamics

Lavraud, B.; André, M.; Kistler, L. M. +13 more

Ionospheric ions (mainly H⁺, He⁺, and O⁺) escape from the ionosphere and populate the Earth's magnetosphere. Their thermal energies are usually low when they first escape the ionosphere, typically a few electron volt to tens of electron volt, but they are energized in their journey through the magnetosphere. The io…

Evidence of Small Scale Plasma Irregularity Effects on Whistler Mode Chorus Propagation

Agapitov, Oleksiy; Hosseini, Poorya; Harid, Vijay +1 more

The impact of randomly distributed field aligned density irregularities on whistler mode wave propagation is investigated using full wave simulations and multipoint spacecraft observations. The irregularities are modeled as randomized density perturbations between 1% and 10% of the nominal background density value with scales of ∼10-60 km transver…

Shock Induced Strong Substorms and Super Substorms: Preconditions and Associated Oxygen Ion Dynamics

Zong, Q. -G.; Fu, S. -Y.; Yue, C.

It is well known that the interaction between interplanetary (IP) shocks and the Earth's magnetosphere would generate/excite various types of geomagnetic phenomena. Progresses have been made on the Earth's magnetospheric response to solar wind forcing in recent years in the aspects associated with magnetospheric substorms. Strong substorms and sup…

Wave-Particle Interactions in the Earths Magnetosphere

Ma, Qianli; Thorne, Richard M.; Li, Wen +1 more

Solar wind turbulence: Connections with energetic particles

Oughton, Sean; Engelbrecht, N. Eugene

For the solar wind, a wealth of observational evidence indicates that turbulence is an important dynamical process for velocity (v), magnetic (b), and other related fluctuations at MHD (fluid) scales. Here we review such observations and turbulence features, including discussion of when wave or turbulence descriptions can (or cannot) explain the o…

Automated Multi-Dataset Analysis (AMDA): An on-line database and analysis tool for heliospheric and planetary plasma data

André, N.; Fedorov, A.; Budnik, E. +27 more

Accessing, visualizing and analyzing heterogeneous plasma datasets has always been a tedious task that hindered students and senior researchers as well. Offering user friendly and versatile tools to perform basic research tasks is therefore pivotal for data centres including the Centre de Données de la Physique des Plasmas (CDPP http://www.cdpp.eu…