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Lightning plays a crucial role in the Earth's climate system, yet existing parameterizations for use in forecasting and earth system models show room for improvement in capturing spatial and temporal variations in its frequency. This study…

Atmospheric and Oceanic Physics · Physics 2025-09-15 Randall Jones , Joel A. Thornton , Chris J. Wright , Robert Holzworth

High-velocity clouds (HVCs) may fuel future star formation in the Milky Way, but they must first survive their passage through the hot halo. While recent work has improved our understanding of the survival criterion for cloud-wind…

Astrophysics of Galaxies · Physics 2025-08-28 Lori E. Porter , Matthew Abruzzo , Greg L. Bryan , Mary Putman , Yong Zheng , Drummond Fielding

The structural and dynamic properties of the dark matter halos, though an important ingredient in understanding large-scale structure formation, require more conservative particle resolution than those required by halo mass alone in a…

Cosmology and Nongalactic Astrophysics · Physics 2022-11-23 Sujatha Ramakrishnan , Premvijay Velmani

The location of El Ejido town over a deep sedimentary basin in a zone of high seismicity in the Spanish context has motivated research on its seismic response characterization. To this aim, S-wave velocity models have been obtained from…

Observations of the solar surface reveal the presence of flows with length scales of around $35$ Mm, commonly referred to as supergranules. Inferring the sub-surface flow profile of supergranules from measurements of the surface and…

Solar and Stellar Astrophysics · Physics 2016-08-03 Jishnu Bhattacharya , Shravan M. Hanasoge

Near-surface extreme winds profoundly affect human society, yet process-based understanding of their changes under climate forcings remains limited. This study systematically investigates the responses of high (HWE) and low (LWE) wind…

Atmospheric and Oceanic Physics · Physics 2026-03-05 G. Zhang , M. Rao , I. Simpson , K. A. Reed , B. Medeiros , H. -H. Chou , T. Shaw

An investigation on correlations between photospheric current helicity and subsur- face kinetic helicity is carried out by analyzing vector magnetograms and subsurface velocities for two rapidly developing active regions. The vector…

Solar and Stellar Astrophysics · Physics 2015-06-12 Yu Gao , Junwei Zhao , Hongqi Zhang

Emergent constraints use relationships between future and current climate states to constrain projections of climate response. Here, we introduce a statistical, hierarchical emergent constraint (HEC) framework in order to link future and…

Atmospheric and Oceanic Physics · Physics 2019-01-23 Kevin Bowman , Noel Cressie , Xin Qu , Alex Hall

Understanding what makes high-dimensional data learnable is a fundamental question in machine learning. On the one hand, it is believed that the success of deep learning lies in its ability to build a hierarchy of representations that…

Machine Learning · Statistics 2024-05-03 Umberto Tomasini , Matthieu Wyart

The quantification of storm updrafts remains unavailable for operational forecasting despite their inherent importance to convection and its associated severe weather hazards. Updraft proxies, like overshooting top area from satellite…

Machine Learning · Computer Science 2024-02-19 Randy J. Chase , Amy McGovern , Cameron Homeyer , Peter Marinescu , Corey Potvin

Local helioseismology provides unique information about the subsurface structure and dynamics of sunspots and active regions. However, because of complexity of sunspot regions local helioseismology diagnostics require careful analysis of…

Near-surface atmospheric conditions can differ sharply over tens to hundreds of meters due to land cover and topography, yet this variability is absent from current weather analyses and forecasts. It is unclear whether such meter-scale…

We investigate the hydrodynamics of the interaction of two supersonic winds in binary systems. The collision of the winds creates two shocks separated by a contact discontinuity. The overall structure depends on the momentum flux ratio eta…

Solar and Stellar Astrophysics · Physics 2015-05-30 Astrid Lamberts , Sebastien Fromang , Guillaume Dubus

We study the occurrence of events, subject to threshold, in a representative SOC sandpile model and in high-resolution rainfall data. The predictability in both systems is analyzed by means of a decision variable sensitive to event…

Atmospheric and Oceanic Physics · Physics 2015-06-11 Anna Deluca , Nicholas R. Moloney , Alvaro Corral

Long Short-Term Memory (LSTM) models are trained to predict forecast errors for the High-Resolution Rapid Refresh (HRRR) model using the New York State Mesonet and Oklahoma State Mesonet near-surface weather observations as ground truth.…

Atmospheric and Oceanic Physics · Physics 2026-05-15 David Aaron Evans , Kara J. Sulia , Nick P. Bassill , Chris D. Thorncroft , Jay C. Rothenberger , Lauriana C. Gaudet

High-resolution mapping of canopy height is essential for forest management and biodiversity monitoring. Although recent studies have led to the advent of deep learning methods using satellite imagery to predict height maps, these…

Computer Vision and Pattern Recognition · Computer Science 2026-03-26 Thomas Boudras , Martin Schwartz , Rasmus Fensholt , Martin Brandt , Ibrahim Fayad , Jean-Pierre Wigneron , Gabriel Belouze , Fajwel Fogel , Philippe Ciais

We inspect the evolution of SIRs from Earth to Mars (distance range 1-1.5 AU) over the declining phase of solar cycle 24 (2014-2018). So far, studies only analyzed SIRs measured at Earth and Mars at different times. We compare existing…

Earth and Planetary Astrophysics · Physics 2021-05-19 Paul Geyer , Manuela Temmer , Jingnan Guo , Stephan G. Heinemann

We propose a super-resolution (SR) simulation system that consists of a physics-based meteorological simulation and an SR method based on a deep convolutional neural network (CNN). The CNN is trained using pairs of high-resolution (HR) and…

Atmospheric and Oceanic Physics · Physics 2019-12-10 Ryo Onishi , Daisuke Sugiyama , Keigo Matsuda

Machine learning (ML) is often viewed as a black-box regression technique that is unable to provide considerable scientific insight. ML models are universal function approximators and - if used correctly - can provide scientific information…

We analyze a merged Parker Solar Probe ($PSP$) and Solar Orbiter ($SO$) dataset covering heliocentric distances $13 \ R_{\odot} \lesssim R \lesssim 220$ $R_{\odot}$ to investigate the radial evolution of power and spectral-index anisotropy…

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