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Could it be that AI weather models are solving physical equations, although they may not be the equations used by conventional NWP models? We compute correlations of forecast skill and Centered Kernel Alignment, providing evidence that…

Atmospheric and Oceanic Physics · Physics 2026-05-25 George Craig , Tobias Selz , Matthias Beylich , Kirsten I. Tempest

For high-energy cosmic-ray physics, it is imperative to determine the mass and energy of the cosmic ray that initiated the air shower in the atmosphere. This information can be extracted from the longitudinal profile of the air shower. In…

Instrumentation and Methods for Astrophysics · Physics 2025-09-23 O. Scholten , T. N. G. Trinh , S. Buitink , A. Corstanje , B. M. Hare , T. Huege , B. V. Jhansi , K. Mulrey , A. Nelles , H. Schoorlemmer , S. Thoudam , P. Turekova , K. de Vries

In this paper we study the depth at which a cosmic ray shower reaches its maximum (\Xmax) as predicted by Monte Carlo simulation. The use of \Xmax in the determination of the primary particle mass can only be done by comparing the measured…

High Energy Astrophysical Phenomena · Physics 2015-06-12 Carlos Jose Todero Peixoto , Vitor de Souza , Jose Bellido

A simple analytical/numerical model has been developed for computing the evolution, over periods of up to a few hours, of the current and temperature profile in the upper layer of the ocean. The model is based upon conservation laws for…

Atmospheric and Oceanic Physics · Physics 2007-05-23 Alastair D. Jenkins , Brian Ward

We describe the general aspects of Monte Carlo Collision Generators suitable for cosmic ray nucleon-Air and nuclei-Air interactions, including accelerator and collider data. The problem of the extrapolation at 3 energy decades above the LHC…

High Energy Physics - Phenomenology · Physics 2017-08-23 Jean-Noël Capdevielle , Fabrice Cohen , Corentin Le Gall

Using hydrodynamical simulations of entire galactic discs similar to the Milky Way, reaching 4.6pc resolution, we study the origins of observed physical properties of giant molecular clouds (GMCs). We find that efficient stellar feedback is…

Astrophysics of Galaxies · Physics 2018-07-04 Kearn Grisdale , Oscar Agertz , Florent Renaud , Alessandro B. Romeo

Surface diffusion of small adsorbates is analyzed in terms of the so-called intermediate scattering function and dynamic structure factor, observables in experiments using the well-known quasielastic Helium atom scattering and Helium spin…

Statistical Mechanics · Physics 2018-09-26 S. Miret-Artés

We investigate a coupled atmosphere-ocean model including the mechanical and thermodynamical interaction between the two fluids for the mid-latitudes. The formulation combines a multilayer quasi-geostrophic dynamical framework with…

Analysis of PDEs · Mathematics 2025-12-23 Federico Fornasaro , Tobias Kuna , Giulia Carigi

Surface runoff shapes planetary landscapes, but global hydrological models often lack the resolution and flexibility to simulate dynamic surface water bodies beyond Earth. Recent studies of Mars have revealed abundant geological and…

Earth and Planetary Astrophysics · Physics 2026-03-05 Alexandre Gauvain , François Forget , Martin Turbet , Jean-Baptiste Clément , Lucas Lange , Romain Vandemeulebrouck

Intrinsic alignments are believed to be a major source of systematics for future generation of weak gravitational lensing surveys like Euclid or LSST. Direct measurements of the alignment of the projected light distribution of galaxies in…

Cosmology and Nongalactic Astrophysics · Physics 2017-02-15 Sandrine Codis , Yohan Dubois , Christophe Pichon , Julien Devriendt , Adrianne Slyz

The shape of a galaxy's spatially unresolved, globally integrated 21-cm emission line depends on its internal gas kinematics: galaxies with rotation-supported gas disks produce double-horned profiles with steep wings, while galaxies with…

It is shown that surface waves propagating against the external current, slowly varying in the horizontal direction in deep water, are governed by the equation which is tantamount to the Gross - Pitaevskii equation modelling the mean-field…

Fluid Dynamics · Physics 2018-05-25 G. Rousseaux , Y. Stepanyants

Geometric phases in particle diffusion systems, an intriguing aspect enlightened from thermal systems, offer a different understanding beyond traditional Brownian motion and Fick's laws. This concept introduces a phase factor with…

Statistical Mechanics · Physics 2023-11-07 Jinrong Liu , Liujun Xu , Gaole Dai , Gang Wang

One of the largest sources of uncertainty in the computation of globular cluster isochrones and hence in the age determination of globular clusters is the lack of a rigorous description of convection. Therefore, we calibrated the…

Astrophysics · Physics 2009-10-31 Bernd Freytag , Maurizio Salaris

The KASKADE and CORSIKA air shower generators are compared to the data collected by MASS2 balloon experiment in 1991. The test of longitudinal profile for proton, helium and muon flux production provide good constraints on these air shower…

Astrophysics · Physics 2009-11-07 J. Guy , P. Vincent , J. P. Tavernet , M. Rivoal

The impacts of Compton scattering of hot cosmic gas with the cosmic microwave background radiation (Sunyaev-Zel'dovich effect, SZ) are consistently quantified in Gaussian and non-Gaussian scenarios, by means of 3D numerical, N-body,…

Cosmology and Nongalactic Astrophysics · Physics 2015-06-17 Francesco Pace , Umberto Maio

A major goal in paleoclimate science is to reconstruct historical climates using proxies for climate variables such as those observed in sediment cores, and in the process learn about climate dynamics. This is hampered by uncertainties in…

Applications · Statistics 2019-04-18 Jake Carson , Michel Crucifix , Simon P. Preston , Richard D. Wilkinson

A simulation study of the energy released by extensive air showers in the form of MHz radiation is performed using the CoREAS simulation code. We develop an efficient method to extract this radiation energy from air-shower simulations. We…

High Energy Astrophysical Phenomena · Physics 2017-03-20 Christian Glaser , Martin Erdmann , Jörg R. Hörandel , Tim Huege , Johannes Schulz

We present a series of adaptive mesh refinement (AMR) hydrodynamic simulations of flat rotation curve galactic gas disks with a detailed treatment of the interstellar medium (ISM) physics of the atomic to molecular phase transition under…

Astrophysics of Galaxies · Physics 2018-01-24 Qi Li , Jonathan C. Tan , Duncan Christie , Thomas G. Bisbas , Benjamin Wu

We show that long-time, long-distance fluctuations of plane-symmetric horizons exhibit universal hydrodynamic behavior. By considering classical fluctuations around black-brane backgrounds, we find both diffusive and shear modes. The…

High Energy Physics - Theory · Physics 2011-05-05 Pavel Kovtun , Dam T. Son , Andrei O. Starinets