Publications


An experimental investigation of blocking by partial barriers in a rotating baroclinic annulus

Geophysical and Astrophysical Fluid Dynamics (2017) 1-33

SD Marshall, PL Read

© 2017 Informa UK Limited, trading as Taylor & Francis Group We present a series of experimental investigations in which a differentially-heated annulus was used to investigate the effects of topography on rotating, stratified flows with similarities to the Earth’s atmospheric or oceanic circulation. In particular, we compare and investigate blocking effects via partial mechanical barriers to previous experiments by the authors utilising azimuthally-periodic topography. The mechanical obstacle used was an isolated ridge, forming a partial barrier, employed to study the difference between partially blocked and fully unblocked flow. The topography was found to lead to the formation of bottom-trapped waves, as well as impacting the circulation at a level much higher than the top of the ridge. This produced a unique flow structure when the drifting flow and the topography interacted in the form of an “interference” regime at low Taylor number, but forming an erratic “irregular” regime at higher Taylor number. The results also showed evidence of resonant wave-triads, similar to those noted with periodic wavenumber-3 topography by Marshall and Read (Geophys. Astrophys. Fluid Dyn., 2015, 109), though the component wavenumbers of the wave-triads and their impact on the flow were found to depend on the topography in question. With periodic topography, wave-triads were found to occur between both the baroclinic and barotropic components of the zonal wavenumber-3 mode and the wavenumber-6 baroclinic component, whereas with the partial barrier two nonlinear resonant wave-triads were noted, each sharing a common wavenumber-1 mode.


Ice-shelf damming in the glacial Arctic Ocean: dynamical regimes of a basin-covering kilometre-thick ice shelf

CRYOSPHERE 11 (2017) 1745-1765

J Nilsson, M Jakobsson, C Borstad, N Kirchner, G Bjork, RT Pierrehumbert, C Stranne


The global circulation

in The Atmosphere and Climate of Mars, (2017) 229-294

JR Barnes, RM Haberle, RJ Wilson, SR Lewis, JR Murphy, PL Read


Linking the Climate and Thermal Phase Curve of 55 Cancri e

ASTROPHYSICAL JOURNAL 849 (2017) ARTN 152

M Hammond, RT Pierrehumbert


Synchronisation of the equatorial QBO by the annual cycle in tropical upwelling in a warming climate

QUARTERLY JOURNAL OF THE ROYAL METEOROLOGICAL SOCIETY 142 (2016) 1111-1120

K Rajendran, IM Moroz, PL Read, SM Osprey


Global energy budgets and "Trenberth diagrams' for the climates of terrestrial and gas giant planets

QUARTERLY JOURNAL OF THE ROYAL METEOROLOGICAL SOCIETY 142 (2016) 703-720

PL Read, J Barstow, B Charnay, S Chelvaniththilan, PGJ Irwin, S Knight, S Lebonnois, SR Lewis, J Mendonca, L Montabone


Spectral analysis of Uranus' 2014 bright storm with VLT/SINFONI

ICARUS 264 (2016) 72-89

PGJ Irwin, LN Fletcher, PL Read, D Tice, I de Pater, GS Orton, NA Teanby, GR Davis


5 Things We Know to Be True.

Scientific American 315 (2016) 46-53

M Shermer, H Hall, R Pierrehumbert, P Offit, S Shostak


Consequences of twenty-first-century policy for multi-millennial climate and sea-level change

NATURE CLIMATE CHANGE 6 (2016) 360-369

PU Clark, JD Shakun, SA Marcott, AC Mix, M Eby, S Kulp, A Levermann, GA Milne, PL Pfister, BD Santer, DP Schrag, S Solomon, TF Stocker, BH Strauss, AJ Weaver, R Winkelmann, D Archer, E Bard, A Goldner, K Lambeck, RT Pierrehumbert, G-K Plattner


A regime diagram for ocean geostrophic turbulence

QUARTERLY JOURNAL OF THE ROYAL METEOROLOGICAL SOCIETY 142 (2016) 2411-2417

A Klocker, DP Marshall, SR Keating, PL Read


How to decarbonize? Look to Sweden

BULLETIN OF THE ATOMIC SCIENTISTS 72 (2016) 105-111

R Pierrehumbert


CONVECTION IN CONDENSIBLE-RICH ATMOSPHERES

ASTROPHYSICAL JOURNAL 822 (2016) ARTN 24

F Ding, RT Pierrehumbert


The effects of short-lived radionuclides and porosity on the early thermo-mechanical evolution of planetesimals

Icarus Elsevier BV 274 (2016) 350-365

T Lichtenberg, GJ Golabek, TV Gerya, MR Meyer


Isotopic enrichment of forming planetary systems from supernova pollution

Monthly Notices of the Royal Astronomical Society Oxford University Press (OUP) 462 (2016) 3979-3992

T Lichtenberg, RJ Parker, MR Meyer


Dynamics of atmospheres with a non-dilute condensible component.

Proceedings. Mathematical, physical, and engineering sciences 472 (2016) 20160107-

RT Pierrehumbert, F Ding

The diversity of characteristics for the host of recently discovered exoplanets opens up a great deal of fertile new territory for geophysical fluid dynamics, particularly when the fluid flow is coupled to novel thermodynamics, radiative transfer or chemistry. In this paper, we survey one of these new areas-the climate dynamics of atmospheres with a non-dilute condensible component, defined as the situation in which a condensible component of the atmosphere makes up a substantial fraction of the atmospheric mass within some layer. Non-dilute dynamics can occur for a wide range of condensibles, generically applying near both the inner and the outer edges of the conventional habitable zone and in connection with runaway greenhouse phenomena. It also applies in a wide variety of other planetary circumstances. We first present a number of analytical results developing some key features of non-dilute atmospheres, and then show how some of these features are manifest in simulations with a general circulation model adapted to handle non-dilute atmospheres. We find that non-dilute atmospheres have weak horizontal temperature gradients even for rapidly rotating planets, and that their circulations are largely barotropic. The relative humidity of the condensible component tends towards 100% as the atmosphere becomes more non-dilute, which has important implications for runaway greenhouse thresholds. Non-dilute atmospheres exhibit a number of interesting organized convection features, for which there is not yet any adequate theoretical understanding.


New use of global warming potentials to compare cumulative and short-lived climate pollutants

NATURE CLIMATE CHANGE 6 (2016) 773-+

MR Allen, JS Fuglestvedt, KP Shine, A Reisinger, RT Pierrehumbert, PM Forster


Exploring the Venus global super-rotation using a comprehensive general circulation model

PLANETARY AND SPACE SCIENCE 134 (2016) 1-18

JM Mendonca, PL Read


The solsticial pause on Mars: 1. A planetary wave reanalysis

ICARUS 264 (2016) 456-464

SR Lewis, DP Mulholland, PL Read, L Montabone, RJ Wilson, MD Smith


The solsticial pause on Mars: 2 modelling and investigation of causes

ICARUS 264 (2016) 465-477

DP Mulholland, SR Lewis, PL Read, J-B Madeleine, F Forget


Predictability of the thermally driven laboratory rotating annulus

QUARTERLY JOURNAL OF THE ROYAL METEOROLOGICAL SOCIETY 142 (2016) 911-927

RMB Young, PL Read

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