Publications


There is no Plan B for dealing with the climate crisis

BULLETIN OF THE ATOMIC SCIENTISTS (2019)

R Pierrehumbert


Potential Vorticity of Saturn's Polar Regions: Seasonality and Instabilities

Journal of Geophysical Research: Planets American Geophysical Union (AGU) (2019)

A Antuñano, T del Río-Gaztelurrutia, A Sánchez-Lavega, PL Read, LN Fletcher


Direct imaging of molten protoplanets in nearby young stellar associations

ASTRONOMY & ASTROPHYSICS 621 (2019) ARTN A125

I Bonati, T Lichtenberg, DJ Bower, ML Timpe, SP Quanz


Atmospheric Circulation of Tide-Locked Exoplanets

ANNUAL REVIEW OF FLUID MECHANICS, VOL 51 51 (2019) 275-303

RT Pierrehumbert, M Hammond


Zonal-Mean Atmospheric Dynamics of Slowly Rotating Terrestrial Planets

JOURNAL OF THE ATMOSPHERIC SCIENCES 76 (2019) 1397-1418

GJ Colyer, GK Vallis


Simulating Jupiter's weather layer. Part I: Jet spin-up in a dry atmosphere

ICARUS 326 (2019) 225-252

RMB Young, PL Read, Y Wang


Simulating Jupiter's weather layer. Part II: Passive ammonia and water cycles

ICARUS 326 (2019) 253-268

RMB Young, PL Read, Y Wang


Magma ascent in planetesimals: Control by grain size

EARTH AND PLANETARY SCIENCE LETTERS 507 (2019) 154-165

T Lichtenberg, T Keller, RE Katz, GJ Golabek, TV Gerya


Overview of new MAST physics in anticipation of first results from MAST Upgrade

NUCLEAR FUSION 59 (2019) ARTN 112011

JR Harrison, RJ Akers, SY Allan, JS Allcock, JO Allen, L Appel, M Barnes, N Ben Ayedl, W Boeglin, C Bowman, J Bradley, P Browning, P Bryant, M Carr, M Cecconello, CD Challis, S Chapman, IT Chapman, GJ Colyer, S Conroy, NJ Conway, M Cox, G Cunningham, RO Dendy, W Dorland, BD Dudson, L Easy, SD Elmore, T Farley, X Feng, AR Field, A Fil, GM Fishpool, M Fitzgerald, K Flesch, MFJ Fox, H Frerichs, S Gadgil, D Gahle, L Garzotti, Y-C Ghim, S Gibson, KJ Gibson, S Hall, C Ham, N Heiberg, SS Henderson, E Highcock, B Hnat, J Howard, J Huang, SWA Irvine, AS Jacobsen, O Jones, I Katramados, D Keeling, A Kirk, I Klimek, L Kogan, J Leland, B Lipschultz, B Lloyd, J Lovell, B Madsen, O Marshall, R Martin, G McArdle, K McClements, B McMillan, A Meakins, HF Meyer, F Militello, J Milnes, S Mordijck, AW Morris, D Moulton, D Muir, K Mukhi, S Murphy-Sugrue, O Myatra, G Naylor, P Naylor, SL Newton, T O'Gorman, J Omotani, MG O'Mullane, S Orchard, SJP Pamela, L Pangione, F Parra, RV Perez, L Piron, M Price, ML Reinke, F Riva, CM Roach, D Robb, D Ryan, S Saarelma, M Salewski, S Scannell, AA Schekochihin, O Schmitz, S Sharapov, R Sharples, SA Silburn, SF Smith, A Sperduti, R Stephen, NT Thomas-Davies, AJ Thornton, M Turnyanskiy, M Valovic, F Van Wyk, RGL Vann, NR Walkden, I Waters, HR Wilson, MAST-U Team, EM Team


A water budget dichotomy of rocky protoplanets from Al-26-heating

NATURE ASTRONOMY 3 (2019) 307-313

T Lichtenberg, GJ Golabek, R Burn, MR Meyer, Y Alibert, TV Gerya, C Mordasini


Investigating the semiannual oscillation on Mars using data assimilation

ICARUS 333 (2019) 404-414

T Ruan, NT Lewis, SR Lewis, L Montabone, PL Read


Climate impacts of cultured meat and beef cattle.

Frontiers in sustainable food systems 3 (2019)

J Lynch, R Pierrehumbert

Improved greenhouse gas (GHG) emission efficiency of production has been proposed as one of the biggest potential advantages of cultured meat over conventional livestock production systems. Comparisons with beef are typically highlighted, as it is a highly emissions intensive food product. In this study we present a more rigorous comparison of the potential climate impacts of cultured meat and cattle production than has previously been made. Warming impacts are evaluated using a simple climate model that simulates the different behaviours of carbon dioxide (CO2), methane (CH4) and nitrous oxide (N2O), rather than relying on carbon dioxide equivalent (CO2e) metrics. We compare the temperature impact of beef cattle and cultured meat production at all times to 1000 years in the future, using four synthetic meat GHG footprints currently available in the literature and three different beef production systems studied in an earlier climate modelling paper. Cattle systems are associated with the production of all three GHGs above, including significant emissions of CH4, while cultured meat emissions are almost entirely CO2 from energy generation. Under continuous high global consumption, cultured meat results in less warming than cattle initially, but this gap narrows in the long term and in some cases cattle production causes far less warming, as CH4 emissions do not accumulate, unlike CO2. We then model a decline in meat consumption to more sustainable levels following high consumption, and show that although cattle systems generally result in greater peak warming than cultured meat, the warming effect declines and stabilises under the new emission rates of cattle systems, while the CO2 based warming from cultured meat persists and accumulates even under reduced consumption, again overtaking cattle production in some scenarios. We conclude that cultured meat is not prima facie climatically superior to cattle production; its relative impact instead depends on the availability of decarbonised energy generation and the specific production systems that are realised.


Wave number selection in the presence of noise: Experimental results

Chaos 28 (2018)

D Zhilenko, O Krivonosova, M Gritsevich, P Read

© 2018 Author(s). In this study, we consider how the wave number selection in spherical Couette flow, in the transition to azimuthal waves after the first instability, occurs in the presence of noise. The outer sphere was held stationary, while the inner sphere rotational speed was increased linearly from a subcritical flow to a supercritical one. In a supercritical flow, one of two possible flow states, each with different azimuthal wave numbers, can appear depending upon the initial and final Reynolds numbers and the acceleration value. Noise perturbations were added by introducing small disturbances into the rotational speed signal. With an increasing noise amplitude, a change in the dominant wave number from m to m ± 1 was found to occur at the same initial and final Reynolds numbers and acceleration values. The flow velocity measurements were conducted by using laser Doppler anemometry. Using these results, the role of noise as well as the behaviour of the amplitudes of the competing modes in their stages of damping and growth were determined.


Impact splash chondrule formation during planetesimal recycling

Icarus Elsevier BV 302 (2018) 27-43

T Lichtenberg, GJ Golabek, CP Dullemond, M Schönbächler, TV Gerya, MR Meyer


Late metal–silicate separation on the IAB parent asteroid: Constraints from combined W and Pt isotopes and thermal modelling

Earth and Planetary Science Letters Elsevier BV 482 (2018) 490-500

AC Hunt, DL Cook, T Lichtenberg, PM Reger, M Ek, GJ Golabek, M Schönbächler


Atmospheric Dynamics of Terrestrial Planets

in Handbook of Exoplanets, Springer International Publishing (2018) 1-31

PL Read, SR Lewis, GK Vallis


The Influence of a Substellar Continent on the Climate of a Tidally Locked Exoplanet

The Astrophysical Journal 854 (2018) 171-171

NT Lewis, FH Lambert, IA Boutle, NJ Mayne, J Manners, DM Acreman


Descent Rate Models of the Synchronization of the Quasi-Biennial Oscillation by the Annual Cycle in Tropical Upwelling

JOURNAL OF THE ATMOSPHERIC SCIENCES 75 (2018) 2281-2297

K Rajendran, IM Moroz, SM Osprey, PL Read


Superrotation on Venus, on Titan, and Elsewhere

ANNUAL REVIEW OF EARTH AND PLANETARY SCIENCES, VOL 46 46 (2018) 175-202

PL Read, S Lebonnois


Comparative terrestrial atmospheric circulation regimes in simplified global circulation models. Part I: From cyclostrophic super-rotation to geostrophic turbulence

QUARTERLY JOURNAL OF THE ROYAL METEOROLOGICAL SOCIETY 144 (2018) 2537-2557

Y Wang, PL Read, F Tabataba-Vakili, RMB Young

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