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The meridional temperature profile of the upper layers of planetary atmospheres is set through a balance between differential radiative heating by a nearby star, or by intrinsic heat fluxes emanating from the deep interior, and the…

Atmospheric and Oceanic Physics · Physics 2021-09-10 Basile Gallet , Raffaele Ferrari

The Ocean Heat Uptake Efficiency (OHUE) quantifies the ocean's ability to mitigate surface warming through deep heat sequestration. Despite its importance, the main controls on OHUE, as well as its nearly two-fold spread across contemporary…

Atmospheric and Oceanic Physics · Physics 2023-07-25 Emily Newsom , Laure Zanna , Jonathan Gregory

Interaction between energy-abundant (sub-)mesoscale eddies and internal waves can lead to turbulence generation and may prove important for replenishment of nutrients for deep-sea life and circulation. However, observational evidence of…

Atmospheric and Oceanic Physics · Physics 2026-01-12 Hans van Haren

The interaction between shear and double-diffusive convection (DDC) in the diffusive regime (cold fresh water on top of hot salty water) plays an important role in the heat and mass transport of polar region oceans. This study computes…

Fluid Dynamics · Physics 2025-12-24 Van Duc Nguyen , Chang Liu

Sinking marine snow particles, composed primarily of organic matter, control the global export of photosynthetically fixed carbon from the ocean surface to depth. The fate of sedimenting marine snow particles is in part regulated by their…

Fluid Dynamics · Physics 2026-03-25 Jan Turczynowicz , Radost Waszkiewicz , Jonasz Słomka , Maciej Lisicki

The stratification near the base of the Sun's convective envelope is governed by processes of convective overshooting and element diffusion, and the region is widely believed to play a key role in the solar dynamo. The stratification in…

Solar and Stellar Astrophysics · Physics 2015-05-27 Joergen Christensen-Dalsgaard , Mario J. P. F. G. Monteiro , Matthias Rempel , Michael J. Thompson

Minimally stable site (MSS) clusters play a dominant role in shaping avalanches in the self-organized critical (SOC) systems. The manipulation of MSS clusters through local smoothings (diffusion) alter the MSS landscape, suppressing rare…

Statistical Mechanics · Physics 2025-02-26 Armin Makani , Morteza Nattagh Najafi

Like elsewhere in the deep-sea, life in the deep Mediterranean depends on turbulent exchange across the stable vertical density stratification for supply of nutrients and oxygen. Commonly modelled, turbulent exchange is inversely…

Atmospheric and Oceanic Physics · Physics 2023-11-23 Hans van Haren

Stellar structure calculations are able to predict precisely the properties of stars during their evolution. However, convection is still modelled by the mixing length theory; therefore, the upper boundary conditions near the optical…

Solar and Stellar Astrophysics · Physics 2016-02-03 Zazralt Magic

The physical conditions of the solar photosphere change on very small spatial scales both horizontally and vertically. Such a complexity may pose a serious obstacle to the accurate determination of solar magnetic fields. We examine the…

Solar and Stellar Astrophysics · Physics 2015-05-19 D. Orozco Suárez , L. R. Bellot Rubio , A. Vögler , J. C. Del Toro Iniesta

Weakly nonlinear internal wave-wave interaction is a key mechanism that cascades energy from large to small scales, leading to ocean turbulence and mixing. Oceans typically have a non-uniform density stratification profile; moreover,…

Fluid Dynamics · Physics 2022-07-13 Saranraj Gururaj , Anirban Guha

We analyze in-situ observations of imbalanced solar wind turbulence to evaluate MHD turbulence models grounded in "Critical Balance" (CB) and "Scale-Dependent Dynamic Alignment" (SDDA). At energy injection scales, both outgoing and ingoing…

The spectral model of Perry, Henbest & Chong (1986) predicts that the integral length-scale varies very slowly with distance to the wall in the intermediate layer. The only way for the integral length scale's variation to be more realistic…

Fluid Dynamics · Physics 2017-07-10 J. C. Vassilicos , J. -P. Laval , J. -M. Foucaut , M. Stanislas

Eastern Boundary Upwelling Systems (EBUS) are characterized by wind-triggered upwelling of deep waters along the coast. They are hotspots of biological productivity and diversity and therefore have a high economic, ecological and social…

Atmospheric and Oceanic Physics · Physics 2025-04-28 Raquel Flügel , Steven Herbette , Anne-Marie Treguier , Robin Waldman , Malcolm Roberts

The variability of the strength of the Atlantic Meridional Overturning Circulation is influenced substantially by the formation of deep water in the North Atlantic. In many ocean models, so-called deep-decoupling oscillations have been…

Dynamical Systems · Mathematics 2024-06-04 John Bailie , Henk A. Dijkstra , Bernd Krauskopf

Hydrodynamical instabilities in disks around young stars depend on the thermodynamic stratification of the disk and on the local rate of thermal relaxation. Here, we map the spatial extent of unstable regions for the Vertical Shear…

Earth and Planetary Astrophysics · Physics 2019-02-05 Thomas Pfeil , Hubert Klahr

The global ocean overturning circulation, critically dependent on the global density stratification, plays a central role in regulating climate evolution. While it is well-known that the global stratification profile exhibits a strong…

Atmospheric and Oceanic Physics · Physics 2022-04-07 Julian Mak , David P. Marshall , Gurvan Madec , James R. Maddison

A one-year time series of moored high-resolution temperature T-sensor data from 1455 m depth on a 3900 m long line in about 5300 m of water in the NE-Atlantic Canary Basin are dominated by salinity (over-)compensated intrusions arising from…

Atmospheric and Oceanic Physics · Physics 2019-03-27 Hans van Haren

Turbulent and internal wave motions are important for the exchange of momentum, heat and suspended matter in the deep-sea which is generally stably stratified in density. Turbulence-generation models involve shear of vertical current…

Fluid Dynamics · Physics 2023-03-21 Hans van Haren

Recent theoretical progress using multiscale asymptotic analysis has revealed various possible regimes of stratified turbulence. Notably, buoyancy transport can either be dominated by advection or diffusion, depending on the effective…

Fluid Dynamics · Physics 2024-11-20 Pascale Garaud , Greg P. Chini , Laura Cope , Kasturi Shah , Colm-cille P. Caulfield