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Knowledge about deep-ocean turbulent mixing and flow circulation above abyssal hilly plains is important to quantify processes for the modelling of resuspension and dispersal of sediments in areas where turbulence sources are expected to be…

Atmospheric and Oceanic Physics · Physics 2020-02-26 Hans van Haren

The impact of large atmospheric disturbances on deep benthic communities is not well known quantitatively. Observations are scarce but may reveal specific processes leading to turbulent disturbances. Here, we present high-resolution…

Atmospheric and Oceanic Physics · Physics 2020-04-06 Hans van Haren , Wu-Cheng Chi , Chu-Fang Yang , Yiing-Jang Yang , Sen Jan

We have designed a simple multi-scale method that identifies turbulent motions in hydrodynamical grid simulations. The method does not assmume ant a-priori coherence scale to distinguish laminar and turbulent flows. Instead, the local mean…

Cosmology and Nongalactic Astrophysics · Physics 2015-06-04 F. Vazza , E. Roediger , M. Brueggen

The solar wind (SW) and local interstellar medium (LISM) are turbulent media. Their interaction is governed by complex physical processes and creates heliospheric regions with significantly different properties in terms of particle…

The mechanism behind angular momentum transport in protoplanetary disks, and whether this transport is turbulent in nature, is a fundamental issue in planet formation studies. Recent ALMA observations have suggested that turbulent…

Solar and Stellar Astrophysics · Physics 2018-09-26 Jacob B. Simon , Xue-Ning Bai , Kevin M. Flaherty , A. Meredith Hughes

Planetary transits are commonly observed at visible wavelengths. Here we investigate the shape of a planetary transit observed at radio wavelengths. Solar maps of the Sun at 17 GHz are used as a proxy for the stellar eclipse by several…

Solar and Stellar Astrophysics · Physics 2013-10-28 Caius L. Selhorst , Cassio L. Barbosa , Adriana Válio

Turbulent plasma motion is common in the universe, and invoked in solar flares to drive effective acceleration leading to high energy electrons. Unresolved mass motions are frequently detected in flares from extreme ultraviolet (EUV)…

Solar and Stellar Astrophysics · Physics 2023-05-03 Wenzhi Ruan , Limei Yan , Rony Keppens

The vertical component (Z) of the geomagnetic field observed by ground-based observatories of the INTERMAGNET network has been used to analyze the effects of the movement of electrically conducting sea water through the geomagnetic field…

Space Physics · Physics 2011-08-25 Virginia Klausner , Margarete O. Domingues , Odim Mendes , Andres R. R. Papa

Turbulence is a vital part of the interstellar medium (ISM) of galaxies, contributing significantly to galaxy energy budgets and acting as a regulator of star formation. Despite this, little is understood about ISM turbulence empirically.…

Astrophysics of Galaxies · Physics 2021-07-26 Dana Simard , Vikram Ravi

Vertically 0.042-m-spaced moored high-resolution temperature sensors are used for detailed internal wave-turbulence monitoring near Texel North Sea and Wadden Sea beaches on calm summer days. In the maximum 2 m deep waters irregular…

Atmospheric and Oceanic Physics · Physics 2019-06-07 Hans van Haren

We perform direct numerical simulations of magnetohydrodynamic turbulence in the early universe and numerically compute the resulting stochastic background of gravitational waves and relic magnetic fields. These simulations do not make the…

Cosmology and Nongalactic Astrophysics · Physics 2021-07-15 Alberto Roper Pol , Sayan Mandal , Axel Brandenburg , Tina Kahniashvili , Arthur Kosowsky

Traditionally devoted to electron density profile measurement we show that fast frequency sweeping reflectometry technique can bring valuable and innovative measurements onto plasma turbulence. While fast frequency sweeping technique is…

Plasma Physics · Physics 2007-05-23 F. Clairet , L. Vermare , S. Heuraux , G. Leclert

During Type III solar radio bursts, beam-driven upper-hybrid wave turbulence is converted into electromagnetic emissions at the fundamental plasma frequency and its harmonic, through a chain of various linear and nonlinear wave processes.…

Plasma Physics · Physics 2026-01-15 Francisco Javier Polanco-Rodríguez , Catherine Krafft , Philippe Savoini

Microturbulence, i.e. enhanced fluctuations of plasma density, electric and magnetic fields, is of great interest in astrophysical plasmas, but occurs on spatial scales far too small to resolve by remote sensing, e.g., at ~ 1-100 cm in the…

Astrophysics · Physics 2009-11-13 Gelu M. Nita , Dale E. Gary , Gregory D. Fleishman

We study supernova-driven galactic outflows as a mechanism for injecting turbulence in the intergalactic medium (IGM) far from galaxies. To this aim we follow the evolution of a 10^13 Msun galaxy along its merger tree, with carefully…

Cosmology and Nongalactic Astrophysics · Physics 2011-11-30 Carmelo Evoli , Andrea Ferrara

Feedback from protostellar outflows can influence the nature of turbulence in star forming regions even if they are not the primary source of velocity dispersion for all scales of molecular clouds. For the rate and power expected in star…

Solar and Stellar Astrophysics · Physics 2015-05-18 Jonathan J. Carroll , Adam Frank , Eric G Blackman

The Very Local Interstellar Medium (VLISM) contains clouds which consist of partially-ionized plasma. These clouds can be effectively diagnosed via high resolution optical and ultraviolet spectroscopy of the absorption lines they form in…

Astrophysics of Galaxies · Physics 2015-05-19 Steven R. Spangler , Allison H. Savage , Seth Redfield

Spatially resolved observations of molecular line emission have the potential to yield unique constraints on the nature of turbulence within protoplanetary disks. Using a combination of local non-ideal magnetohydrodynamic simulations and…

Solar and Stellar Astrophysics · Physics 2015-08-19 Jacob B. Simon , A. Meredith Hughes , Kevin M. Flaherty , Xue-Ning Bai , Philip J. Armitage

Turbulence in the Local Bubble could play an important role in the thermodynamics of the gas that is there. The best astronomical technique for measuring turbulence in astrophysical plasmas is radio scintillation. Measurements of the level…

Astrophysics · Physics 2009-06-23 Steven R. Spangler

In the stably stratified ocean, small-scale turbulence is important for vertical exchange and hence for the mixing of water masses and suspended matter. To observationally study turbulent motions and the buoyancy- and shear-generators…

Atmospheric and Oceanic Physics · Physics 2022-09-23 Hans van Haren
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