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The distribution of liquid water in ice-free clouds determines their radiative properties, a significant source of uncertainty in weather and climate models. Evaporation and turbulent mixing cause a cloud to display large variations in…

Fluid Dynamics · Physics 2021-06-02 J. Fries , G. Sardina , G. Svensson , B. Mehlig

In this paper, we will describe some of the recent experimental measurements [1, 2, 3] performed at CESRTA [4], and the supporting simulations, which probe the interaction of the electron cloud with the stored beam. These experiments have…

Robust sensing and perception in adverse weather conditions remain one of the biggest challenges for realizing reliable autonomous vehicle mobility services. Prior work has established that rainfall rate is a useful measure for the…

Signal Processing · Electrical Eng. & Systems 2022-04-26 Robin Karlsson , David Robert Wong , Kazunari Kawabata , Simon Thompson , Naoki Sakai

We present a new method aimed at improving the efficiency of component by component ionization modeling of intervening quasar absorption line systems. We carry out cloud-by-cloud, multiphase modeling making use of CLOUDY and Bayesian…

We propose a novel method of determination of the dust particle spatial distribution in dust clouds that form in three-dimensional (3D) complex plasmas under microgravity conditions. The method utilizes the data obtained during the 3D…

Our understanding of how molecular clouds form in the interstellar medium (ISM) would be greatly helped if we had a reliable observational tracer of the gas flows responsible for forming the clouds. Fine structure emission from singly…

Astrophysics of Galaxies · Physics 2019-05-14 Paul C. Clark , Simon C. O. Glover , Sarah E. Ragan , Ana Duarte-Cabral

We produce synthetic images and SEDs from radiation hydrodynamical simulations of radiatively driven implosion. The synthetically imaged bright rimmed clouds (BRCs) are morphologically similar to those observed in star forming regions.…

Solar and Stellar Astrophysics · Physics 2015-06-05 Thomas J. Haworth , Tim J. Harries , David M. Acreman

Issues relating to extensive air showers observation by a space-borne fluorescence detector and the effects of clouds on the observations are investigated using Monte Carlo simulation. The simulations assume the presence of clouds with…

Astrophysics · Physics 2009-11-10 T. Abu-Zayyad , C. C. H. Jui , E. C. Loh

We present synthetic dust polarisation maps of 3D magneto-hydrodynamical simulations of molecular clouds before the onset of stellar feedback. The clouds are modelled within the SILCC-Zoom project and are embedded in their galactic…

Astrophysics of Galaxies · Physics 2018-10-31 D. Seifried , S. Walch , S. Reissl , J. C. Ibáñez-Mejía

Accurate assessment of atmospheric nitrogen dioxide (NO$_2$) and sulfur dioxide (SO$_2$) is essential for understanding climate-air quality interactions, supporting environmental policy, and protecting public health. Traditional monitoring…

Computer Vision and Pattern Recognition · Computer Science 2026-04-07 Prasanjit Dey , Soumyabrata Dev , Bianca Schoen-Phelan

We study the reliability of mass estimates obtained for molecular cloud cores using sub-millimetre and infrared dust emission. We use magnetohydrodynamic simulations and radiative transfer to produce synthetic observations with spatial…

Astrophysics of Galaxies · Physics 2015-05-20 J. Malinen , M. Juvela , D. C. Collins , T. Lunttila , P. Padoan

The representation of clouds and associated processes of rain and snow formation remains one of the major uncertainties in climate and weather prediction models. In a companion paper (Part I), we systematically derived a two moment bulk…

Atmospheric and Oceanic Physics · Physics 2016-06-08 David Collins , Boualem Khouider

This work derives and validates a noise model that encapsulates deadtime of non-paralyzable detectors with random photon arrivals to enable advanced processing, like maximum-likelihood estimation, of high resolution atmospheric lidar…

Signal Processing · Electrical Eng. & Systems 2025-06-12 Grant J. Kirchhoff , Matthew Hayman , Willem J. Marais , Jeffrey P. Thayer , Rory A. Barton-Grimley

Recent observations of brown dwarf spectroscopic variability in the infrared infer the presence of patchy cloud cover. This paper proposes a mechanism for producing inhomogeneous cloud coverage due to the depletion of cloud particles…

Solar and Stellar Astrophysics · Physics 2015-05-19 Craig R. Stark , Christiane Helling , Declan A. Diver

Suspended in the atmosphere are millions of tonnes of mineral dust which interacts with weather and climate. Accurate representation of mineral dust in weather models is vital, yet remains challenging. Large scale weather models use high…

Geophysics · Physics 2024-06-18 Trish E. Nowak , Andy T. Augousti , Benno I. Simmons , Stefan Siegert

Non-ideal MHD effects are thought to be a crucial component of the star-formation process. Numerically, several complications render the study of non-ideal MHD effects in 3D simulations extremely challenging and hinder our efforts of…

Astrophysics of Galaxies · Physics 2025-02-12 E. Agianoglou , A. Tritsis , K. Tassis

We propose a novel clustering approach for point-cloud segmentation based on supervised contrastive metric learning (CML). Rather than predicting cluster assignments or object-centric variables, the method learns a latent representation in…

High Energy Physics - Experiment · Physics 2026-03-25 Max Marriott-Clarke , Lazar Novakovic , Elizabeth Ratzer , Robert J. Bainbridge , Loukas Gouskos , Benedikt Maier

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

Emergency response applications for nuclear or radiological events can be significantly improved via deep feature learning due to the hidden complexity of the data and models involved. In this paper we present a novel methodology for rapid…

Machine Learning · Computer Science 2018-04-02 I. A. Klampanos , A. Davvetas , S. Andronopoulos , C. Pappas , A. Ikonomopoulos , V. Karkaletsis