Causal or casual link between the rise of nannoplankton calcification and an abrupt tectonically-driven atmospheric CO2 decline in the Late Triassic?

GEOCHIMICA ET COSMOCHIMICA ACTA 72:12 (2008) A315-A315

Authors:

Yves Godderis, Yannick Donnadieu, Colomban De Vargas, Raymond T Pierrehumbert, Gilles Dromart, Bas Van De Schootbrugge

Direct numerical simulation of transitions towards structural vacillation in an air-filled, rotating, baroclinic annulus

PHYSICS OF FLUIDS 20:4 (2008) ARTN 044107

Authors:

Peter L Read, Pierre Maubert, Anthony Randriamampianina, Wolf-Gerrit Fruh

Dynamics of convectively driven banded jets in the laboratory (vol 64, pg 4031, 2007)

JOURNAL OF THE ATMOSPHERIC SCIENCES 65:1 (2008) 287-287

Authors:

Peter L Read, Yasuhiro H Yamazaki, Stephen R Lewis, Paul D Williams, Robin Wordsworth, Kuniko Miki-Yamazaki, Joel Sommeria, Henri Didelle, Adam M Fincham

Flow transitions resembling bifurcations of the logistic map in simulations of the baroclinic rotating annulus

Physica D Elsevier 237:18 (2008) 2251-2262

Authors:

RMB Young, PL Read

Abstract:

We present evidence for a sequence of bifurcations in simulations of the differentially heated baroclinic rotating annulus, similar to bifurcations of the logistic map. The Met. Office / Oxford Rotating Annulus Laboratory Simulation (MORALS) code is used to construct a detailed numerical regime diagram for the annulus, and the distribution of regimes in parameter space is discussed. The bifurcations are observed in a sequence of runs at high temperature forcing, identified by Poincare sections of the dominant temperature mode amplitude time series. Higher order return maps and predictions using quadratic fits to the data are used to verify this result, and Lyapunov exponents are calculated to identify and quantify the chaotic parts of the sequence. (c) 2008 Elsevier B.V. All rights reserved.

Inertia-Gravity Waves Emitted from Balanced Flow: Observations, Properties, and Consequences

JOURNAL OF THE ATMOSPHERIC SCIENCES 65:11 (2008) 3543-3556

Authors:

Paul D Williams, Thomas WN Haine, Peter L Read