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Our solar system's path has recently been shown to potentially intersect dense interstellar clouds 2 and 7 million years ago: the Local Lynx of Cold Cloud and the edge of the Local Bubble. These clouds compressed the heliosphere, directly…

Earth and Planetary Astrophysics · Physics 2024-09-12 Jesse A. Miller , Merav Opher , Maria Hatzaki , Kyriakoula Papachristopoulou , Brian C. Thomas

Condensational growth of cloud droplets due to supersaturation fluctuations is investigated by solving the hydrodynamic and thermodynamic equations using direct numerical simulations with droplets being modeled as Lagrangian particles. The…

Atmospheric and Oceanic Physics · Physics 2019-02-20 Xiang-Yu Li , Gunilla Svensson , Axel Brandenburg , Nils E. L. Haugen

The effects of multi-layered clouds in the atmospheres of Earth-like planets orbiting different types of stars are studied. The radiative effects of cloud particles are directly correlated with their wavelength-dependent optical properties.…

Earth and Planetary Astrophysics · Physics 2010-02-16 D. Kitzmann , A. B. C. Patzer , P. von Paris , M. Godolt , B. Stracke , S. Gebauer , J. L. Grenfell , H. Rauer

Considering turbulence is crucial to understanding clouds. However, covering all scales involved in the turbulent mixing of clouds with their environment is computationally challenging, urging the development of simpler models to represent…

Recent HST observations suggest that the NLR in Seyfert Galaxies can be the result of interaction between jet and external inhomogeneous medium; following this suggestion we perform numerical simulations considering the impact of a…

Astrophysics · Physics 2007-05-23 P. Rossi , A. Capetti , G. Bodo , S. Massaglia , A. Ferrari

Measurements of cosmic-ray abundances on balloons are affected by interactions in the residual atmosphere above the balloon. Corrections for such interactions are particularly important for observations of rare secondary particles such as…

High Energy Astrophysical Phenomena · Physics 2013-11-12 A. Obermeier , P. Boyle , J. Hörandel , D. Müller

We investigate the evolution of dusty gas clouds falling into the centre of an active Seyfert nucleus. Two-dimensional high-resolution radiation hydrodynamics simulations are performed to study the fate of single clouds and the interaction…

Cosmology and Nongalactic Astrophysics · Physics 2015-05-27 Marc Schartmann , Martin Krause , Andreas Burkert

We present a comparative study of the size-line width relation for substructures within six molecular clouds in the Large Magellanic Cloud (LMC) mapped with the Atacama Large Millimeter/submillimeter Array (ALMA). Our sample extends our…

Aerosols' impact on the performance of a clear-sky solar irradiance model is often evaluated from the perspective of the overall accuracy of estimates. This study assesses the aerosol role in clear-sky solar irradiance modelling from a…

We present a full hydrodynamical investigation of a system of self-contained, interacting gas `cloudlets'. Calculations are performed using SPH, and cloudlets are allowed to collide, dissipate kinetic energy, merge and undergo local…

Astrophysics · Physics 2009-11-07 David Gittins , Cathie Clarke , Matthew Bate

When moist air meets a cold surface, it creates a breath figure characterized by numerous small droplets. The central question is how the vapor flux is distributed between the growth of previously condensed drops and the nucleation of new…

Fluid Dynamics · Physics 2025-08-27 Ambre Bouillant , Christopher Henkel , Uwe Thiele , Bruno Andreotti , Jacco H. Snoeijer

Sea ice plays a crucial role in the climate system, particularly in the Marginal Ice Zone (MIZ), a transitional area consisting of fragmented ice between the open ocean and consolidated pack ice. As the MIZ expands, understanding its…

Geophysics · Physics 2024-10-31 Changhong Mou , Samuel N. Stechmann , Nan Chen

Cloud microphysical parameterizations in atmospheric models describe the formation and evolution of clouds and precipitation, a central weather and climate process. Cloud-associated latent heating is a primary driver of large and…

We demonstrate experimentally that a cloud of cold atoms with a size comparable to the wavelength of light can induce large group delays on a laser pulse when the laser is tightly focused on it and is close to an atomic resonance. Delays as…

Atomic Physics · Physics 2016-11-23 S. Jennewein , Y. R. P. Sortais , J. -J. Greffet , A. Browaeys

Evaporation of cloud droplets accelerates when turbulence mixes dry air into the cloud, affecting droplet-size distributions in atmospheric clouds, combustion sprays, and jets of exhaled droplets. The challenge is to model local…

Fluid Dynamics · Physics 2023-12-21 J. Fries , G. Sardina , G. Svensson , A. Pumir , B. Mehlig

Aerosol opacity has emerged as a critical factor controlling transmission and emission spectra. We provide a simple guideline for the effects of aerosol morphology on opacity and residence time in the atmosphere, as it pertains to transit…

Earth and Planetary Astrophysics · Physics 2024-08-22 Sanaz Vahidinia , Sarah E. Moran , Mark S. Marley , Jeff N. Cuzzi

Cosmic rays interact with nuclei in the Earth's atmosphere to produce extensive air showers, which give rise to the atmospheric muon flux. Temperature fluctuations in the atmosphere influence the rate of muons measured in deep underground…

High Energy Physics - Phenomenology · Physics 2025-09-23 Amanda Alves , Lilly Pyras , Dennis Soldin , Stef Verpoest

By reflecting solar radiation and reducing longwave emissions, clouds regulate the earth's radiation budget, impacting atmospheric circulation and cloud dynamics. Given the diurnal fluctuation of shortwave and longwave radiation, a shift in…

Atmospheric and Oceanic Physics · Physics 2017-03-28 Jun Yin , Amilcare Porporato

Jets can become collimated as they propagate through dense environments and understanding such interactions is crucial for linking physical models of the environments to observations. In this work, we use 3D special-relativistic simulations…

High Energy Astrophysical Phenomena · Physics 2021-10-27 Lorenzo Nativi , Gavin P. Lamb , Stephan Rosswog , Christoffer Lundman , Grzegorz Kowal

Clouds are the largest source of uncertainty in climate simulations. For exoplanets, cloud simulation is particularly challenging because of the lack of observational data to tune parameterized cloud models. Here we apply Community Aerosol…

Earth and Planetary Astrophysics · Physics 2026-03-05 Huanzhou Yang , Eric T. Wolf , Cheng-Cheng Liu , Yunqian Zhu , Owen B. Toon , Dorian S. Abbot
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