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We numerically and theoretically investigate the Boussinesq Eady model, where a rapidly rotating density-stratified layer of fluid is subject to a meridional temperature gradient in thermal wind balance with a uniform vertically sheared…

The Composite InfraRed Spectrometer (CIRS) on board Cassini revealed an equatorial oscillation of stratospheric temperature, reminiscent of the Earth's Quasi-Biennial Oscillation (QBO), as well as anomalously high temperatures under…

Atmospheric and Oceanic Physics · Physics 2020-08-26 Deborah Bardet , Aymeric Spiga , Sandrine Guerlet , Simon Cabanes , Ehouarn Millour , Alexandre Boissinot

Differential buoyancy surface sources in the ocean may induce a density-driven flow that joins faster flow components to create a multi-scale, 3D flow. Potential temperature and salinity are active tracers that determine the ocean's…

Geophysics · Physics 2022-08-10 Ori Saporta-Katz , Edriss S. Titi , Hezi Gildor , Vered Rom-Kedar

To close the overturning circulation, dense bottom water must upwell via turbulent mixing. Recent studies have identified thin bottom boundary layers (BLs) as locations of intense upwelling, yet it remains unclear how they interact with and…

Atmospheric and Oceanic Physics · Physics 2023-01-18 Henry G. Peterson , Jörn Callies

We discuss 3D global simulations of the early Martian climate that we have performed assuming a faint young Sun and denser CO2 atmosphere. We include a self-consistent representation of the water cycle, with atmosphere-surface interactions,…

Earth and Planetary Astrophysics · Physics 2012-11-26 R. Wordsworth , F. Forget , E. Millour , J. Head , J. -B. Madeleine , B. Charnay

The response of the general circulation in a dry atmosphere to various atmospheric shortwave absorptivities is investigated in a three-dimensional general circulation model with grey radiation. Shortwave absorption in the atmosphere reduces…

Earth and Planetary Astrophysics · Physics 2019-11-05 Wanying Kang , Robin Wordsworth

Cloud is critical for planetary climate and habitability, but it is also one of the most challenging parts of studying planets in and beyond the solar system. Here we use a cloud-resolving model (CRM) with high resolution (2 km) in a…

Earth and Planetary Astrophysics · Physics 2022-08-17 Qiyu Song , Jun Yang , Hang Luo , Cheng Li , Shizuo Fu

The relationship between the spatiotemporal distribution of oxygen transport and blood flow dynamics, accounting for the motion and deformation of individual red blood cells (RBCs), is of fundamental importance for understanding…

Fluid Dynamics · Physics 2026-04-29 Naoki Takeishi , Junya Kobayashi , Shigeo Wada , Satoshi Ii

How strong are quantitative contributions of the key natural modes of climate variability and the anthropogenic factor characterized by the changes of the radiative forcing of greenhouse gases in the atmosphere to the trends of the surface…

Atmospheric and Oceanic Physics · Physics 2021-12-03 I. I. Mokhov , D. A. Smirnov

Traditional definitions of the habitable zone assume that habitable planets contain a carbonate-silicate cycle that regulates CO2 between the atmosphere, surface, and the interior. Such theories have been used to cast doubt on the…

Earth and Planetary Astrophysics · Physics 2018-05-23 Ramses M. Ramirez , Amit Levi

Convection in the liquid outer core of the Earth is driven by thermal and chemical perturbations. The main purpose of this study is to examine the impact of double-diffusive convection on magnetic field generation by means of 3D global…

Geophysics · Physics 2021-05-12 Théo Tassin , Thomas Gastine , Alexandre Fournier

Earth-like planets within the liquid water habitable zone of M type stars may evolve into synchronous rotators. On these planets, the sub-stellar hemisphere experiences perpetual daylight while the opposing anti-stellar hemisphere…

Earth and Planetary Astrophysics · Physics 2015-06-23 Jacob Haqq-Misra , Ravi Kumar Kopparapu

This work is motivated by a desire to understand transitions between stable equilibria observed in Stommel's 1961 thermohaline circulation model. We adapt the model, including a forcing parameter as a dynamic slow variable. The resulting…

Dynamical Systems · Mathematics 2017-07-11 Andrew Roberts , Raj Saha

During the last ice age several quasi-periodic abrupt warming events took place. Known as Dansgaard-Oeschger (DO) events their effects were felt globally, although the North Atlantic experienced the largest temperature anomalies.…

Atmospheric and Oceanic Physics · Physics 2015-02-24 Raj Saha

Accurate ocean dynamics modeling is crucial for enhancing understanding of ocean circulation, predicting climate variability, and tackling challenges posed by climate change. Despite improvements in traditional numerical models, predicting…

We analyze the PCMDI/CMIP3 simulations performed by climate models (CMs) using pre-industrial and SRESA1B scenarios. Relatively large biases are present for most CMs when global energy budgets and when the atmospheric, oceanic, and land…

Atmospheric and Oceanic Physics · Physics 2015-03-13 Valerio Lucarini , Francesco Ragone

In situ boundary arrays have been installed in the North Atlantic to measure the large-scale ocean circulation. Here, we use measurements at the western edge of the North Atlantic at $16^\circ$N and $26^\circ$N to investigate low-frequency…

Atmospheric and Oceanic Physics · Physics 2016-10-24 E. Frajka-Williams , M. Lankhorst , J. Koelling , U. Send

General atmospheric circulation is the system of atmospheric motions over the Earth on the scale of the whole globe. Two main types of circulation have been identified: zonal - characterized by low amplitude waves in the troposphere moving…

Space Physics · Physics 2009-11-13 Katya Georgieva , Boian Kirov , Peter Tonev , Veneta Guineva , Dimitar Atanasov

We construct a climatology of Lagrangian coherent structures (LCSs), the concealed skeleton that shapes transport, with a twelve-year-long data-assimilative simulation of the sea-surface circulation in the Gulf of Mexico (GoM). Computed as…

Atmospheric and Oceanic Physics · Physics 2018-03-28 Rodrigo Duran , Francisco J. Beron-Vera , Maria Josefina Olascoaga

We conduct an in-depth analysis of statistical flow properties calculated from the reference high-resolution Saturn simulation obtained by global climate modelling in Part II. In the steady state of this reference simulation, strongly…

Earth and Planetary Astrophysics · Physics 2020-01-09 Simon , Cabanes , Aymeric , Spiga , Roland , M. B. Young
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