Results 101 to 110 of about 258,357 (262)

Seasonal Ice Cover Could Allow Liquid Lakes to Persist in a Cold Mars Paleoclimate

AGU Advances, Volume 7, Issue 1, February 2026.
Abstract Geomorphic and stratigraphic studies of Mars prove that extensive liquid water flowed and pooled on the surface early in Mars' history. Martian paleoclimate models, however, have difficulty simulating climate conditions warm enough to maintain liquid water on early Mars.
Eleanor L. Moreland, Sylvia G. Dee, Yueyang Jiang, Grace Bischof, Michael A. Mischna, Nyla Hartigan, James M. Russell, John E. Moores, Kirsten L. Siebach   +8 more
wiley   +1 more source

3D Simulations Demonstrate Propagating Thermohaline Convection for Polluted White Dwarfs

The Astrophysical Journal Letters
Polluted white dwarfs (WDs) with small surface convection zones deposit significant concentrations of heavy elements to the underlying radiative interior, presumably driving thermohaline convection.
Imogen G. Cresswell, Adrian E. Fraser, Evan B. Bauer, Evan H. Anders, Benjamin P. Brown   +4 more
doaj   +1 more source

Astrophysical turbulence modeling

, 2011
The role of turbulence in various astrophysical settings is reviewed. Among the differences to laboratory and atmospheric turbulence we highlight the ubiquitous presence of magnetic fields that are generally produced and maintained by dynamo action.
Alexandrova O, Allende Prieto C, Antia H M, Asplund M, Axel Brandenburg, Bahcall J N, Bahcall J N, Bahcall J N, Ballot J, Barge P, Bate M R, Benevolenskaya E E, Beresnyak A, Berezinskii V S, Binney J, Boldyrev S, Boldyrev S, Boldyrev S, Boldyrev S, Bonnor W B, Brandenburg A, Brandenburg A, Brandenburg A, Brandenburg A, Brandenburg A, Brandenburg A, Brandenburg A, Brandenburg A, Brandenburg A, Brandenburg A Kuroda T, Brown B P, Brummell N H, Brun A S, Brun A S, Brunt C M, Brunt C M, Busse F H, Cai K, Choudhuri A R, Crutcher R M, Crutcher R M, Davidson P A, de Avillez M A, De Villiers J-P, Del Sordo F Brandenburg A, Dolag K, Durisen R H, Frank J, Frisch U, Fryxell B, Galtier S, Gammie C F, Goldreich P, Green C A, Green C A, Haugen N E L, Hawley J F, Haxton W C, Hodgson L S, Hubbard A, Hubbard A Brandenburg A, Inaba S, Inutsuka S, Iroshnikov P S, Jappsen A-K, Johansen A Oishi J S Mac Low M-M Klahr H Henning T Youdin A, Kadomtsev B B, Kitchatinov L L, Kleeorin N, Korpi M J, Krause F, Kritsuk A G, Kritsuk A G, Kritsuk A G, Kritsuk A G, Kritsuk A G, Krolik J H, Krumholz M R, Krumholz M R, Käpylä P J Korpi M J, Küker M, Larson R B, Larson R B, Lighthill M J, Lithwick Y, Lithwick Y, Mac Low M-M, Machida M, Machida M, Miesch M S, Miesch M S, Mihalas D, Mitra D, Mitra D, Moffatt H K, Nordlund Å, O'Shea B W, Padoan P, Padoan P, Padoan P, Padoan P, Padoan P, Padoan P Nordlund Å, Pan L, Parker E N, Perez J C, Ponty Y, Pouquet A Baerenzung J Pietarila Graham J Mininni P Politano H Ponty Y, Pulkkinen P, Rempel M, Rempel M, Richard O, Richtmyer R D, Rieutord M, Roettiger K, Roettiger K, Rogers T M, Ruediger G, Ruzmaikin A, Schekochihin A A, Schekochihin A A, Schekochihin A A, Shakura N I, Shore S N, Smith C W, Solanki S K, Spiegel E A, Stefani F, Stein R F, Stein R F, Steinmetz M, Stone J M, Subramanian K, Troland T H, Truelove J K, Tuominen I, Turner N J, Vishniac E T, Vishniac E T, Vázquez-Semadeni E, Wik D R, Wyngaard J C, Yusef-Zadeh F, Åke Nordlund   +143 more
core   +1 more source

Orbital Variability in Grazing Proportion: New Insights From Sedimentary Amino Acid δ15N Records of the Western Equatorial Pacific

AGU Advances, Volume 7, Issue 1, February 2026.
Abstract The carbon sequestration capacity of the biological carbon pump (BCP) is determined by surface ocean carbon fixation and the transportation of fixed carbon to the ocean interior, which is closely linked to the trophic structure of planktonic ecosystem.
Chen Li, Haowen Dang, Jinlong Du, Hongliang Li, Jingjing Zhang, Zhimin Jian   +5 more
wiley   +1 more source

“Halfway to Rayleigh” and Other Insights into the Rossby Wave Instability

The Astrophysical Journal
The Rossby wave instability (RWI) is the fundamental nonaxisymmetric radial shear instability in disks. The RWI can facilitate disk accretion, set the shape of planetary gaps, and produce large vortices. It arises from density and/or temperature features,
Eonho Chang, Andrew N. Youdin
doaj   +1 more source

Low Mach Number Modeling of Type Ia Supernovae. IV. White Dwarf Convection

, 2009
We present the first three-dimensional, full-star simulations of convection in a white dwarf preceding a Type Ia supernova, specifically the last few hours before ignition.
A. Nonaka, A. S. Almgren, Almgren, Almgren, Almgren, Bychkov, Fryxell, Gamezo, Höflich, J. B. Bell, Jordan, Kuhlen, Livne, M. Zingale, Niemeyer, Piro, Piro, Röpke, S. E. Woosley, Stein, Timmes, Timmes, Woosley, Woosley, Woosley, Wunsch, Zingale, Zingale   +27 more
core   +1 more source

How Sediment Supply, Sea‐Level, and Glacial Isostatic Oscillations Drive Alluvial River Long‐Profile Evolution and Terrace Formation

AGU Advances, Volume 7, Issue 1, February 2026.
Abstract For over a century, alluvial river terraces have been used as archives of tectonic deformation or changes in water discharge, sediment supply, and sea level. Despite this long history, such efforts remain challenging: using terraces as deformation markers requires knowledge of their initial geometry, and most attempts to attribute terrace ...
A. Ruby, F. McNab, T. F. Schildgen, A. D. Wickert, V. M. Fernandes   +4 more
wiley   +1 more source

Hydrodynamical Simulations of Proton Ingestion Flashes in Type I X-Ray Bursts

The Astrophysical Journal
We perform the first multidimensional fluid simulations of thermonuclear helium ignition underneath a hydrogen-rich shell. This situation is relevant to Type I X-ray bursts on neutron stars that accrete from a hydrogen-rich companion.
Simon Guichandut, Michael Zingale, Andrew Cumming   +2 more
doaj   +1 more source

Runoff Reconstructions and Future Projections Indicate Highly Variable Water Supply From Pacific Rim Water Towers

AGU Advances, Volume 7, Issue 1, February 2026.
Abstract Anthropogenic climate change affects regional hydrological cycles and poses significant challenges to the sustainable supply of freshwater. The Central China water tower (CCWT) is the key source region feeding the Yangtze and Yellow Rivers, and its runoff is indispensable for the surrounding mega‐city clusters. Here we present a reconstruction
Weipeng Yue, Max C. A. Torbenson, Feng Chen, Frederick Reinig, Jan Esper, Edurne Martinez del Castillo, Shijie Wang, Xiaoen Zhao, Mao Hu, Yang Xu, Martín A. Hadad, Álvaro González‐Reyes, Fidel A. Roig, Tiyuan Hou, Honghua Cao, Hechuan Wang, Heli Zhang, Junqiang Niu, Youping Chen   +18 more
wiley   +1 more source

Machine Learning Characterization of Intermittency in Relativistic Pair Plasma Turbulence: Single and Double Sheet Structures

The Astrophysical Journal Letters
The physics of turbulence in magnetized plasmas remains an unresolved problem. The most poorly understood aspect is intermittency—spatiotemporal fluctuations superimposed on the self-similar turbulent motions.
Trung Ha, Joonas Nättilä, Jordy Davelaar, Lorenzo Sironi   +3 more
doaj   +1 more source