Publications by Raymond Pierrehumbert


Initiation of a Marinoan Snowball Earth in a state-of-the-art atmosphere-ocean general circulation model

CLIMATE OF THE PAST 7 (2011) 249-263

A Voigt, DS Abbot, RT Pierrehumbert, J Marotzke


Sea glacier flow and dust transport on Snowball Earth

GEOPHYSICAL RESEARCH LETTERS 38 (2011) ARTN L17501

D Li, RT Pierrehumbert


Principles of Planetary Climate

Cambridge University Press, 2010

RT Pierrehumbert

This book introduces the reader to all the basic physical building blocks of climate needed to understand the present and past climate of Earth, the climates of Solar System planets, and the climates of extrasolar planets.


PyCCSM: Prototyping a python-based community climate system model

ANZIAM Journal 48 (2010) C1112-C1130

M Tobis, M Steder, J Walter Larson, RT Pierrehumbert, RL Jacob, ET Ong

© Austral. Mathematical Soc. 2010. Coupled climate models are multiphysics models comprising multi-ple separately developed codes that are combined into a single physical system. This composition of codes is amenable to a scripting solution, and Python is a language that offers many desirable properties for this task. We have prototyped a Python coupling and control infrastruc-ture for version 3.0 of the Community Climate System Model (ccsm3). Our objective was to improve dramatically ccsm3's already exible coupling facilities to enable research uses of the model not currently supported. We report the progress in the first steps in this effort: the construction of Python bindings for the Model Coupling Toolkit, a key piece of third-party coupling middleware used in ccsm3, and a Python-based ccsm3 coupler (pypcl) application. We report prelim-inary performance results for this new system, which we call pyccsm. We find pyccsm is significantly slower than its Fortran counterpart, and explain how pypcl's performance may be improved to support production runs. We believe our results augur well for the use of Python in the top-level coupling and organisation of large parallel multiphysics and multiscale applications.


Mudball: Surface dust and Snowball Earth deglaciation

JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES 115 (2010) ARTN D03104

DS Abbot, RT Pierrehumbert


The Importance of Ice Vertical Resolution for Snowball Climate and Deglaciation

JOURNAL OF CLIMATE 23 (2010) 6100-6109

DS Abbot, I Eisenman, RT Pierrehumbert


Element cycling and the evolution of the Earth System

GEOCHIMICA ET COSMOCHIMICA ACTA 74 (2010) A339-A339

Y Godderis, Y Donnadieu, JZ Williams, C Roelandt, J Schott, D Pollard, RT Pierrehumbert, S Brantley


Sensitivity of stable water isotopic values to convective parameterization schemes

Geophysical Research Letters 36 (2009)

JE Lee, R Pierrehumbert, A Swann, BR Lintner

Convective parameterization has been argued as a principal generator of inter-model differences in climate sensitivity, but it is difficult in practice to constrain simulated convective processes. Here we show how stable water vapor isotopes, which are sensitive to the convective condensation rates, may be useful for evaluating convective parameterizations. By varying one of the least constrained convection parameters in the NCAR Community Atmosphere Model (CAM), namely the timescale for consumption of convective available potential energy (CAPE), τ, the simulated precipitation experiences substantial changes in response to changes in both the deep and shallow convection schemes - increasing τ from the standard 2 hours to 8 hours increases the contribution from shallow convection. The lowest order effect of increasing τ is a decrease (increase) in lower (upper) tropospheric condensation rates, with approximately the opposite vertical structure for the change in simulated isotopic signature. Increasing τ from the standard 2 hours to 8 hours also provides a better match to satellite-observed water vapor isotope ratios, albeit with some uncertainty related to the quality of currently-available satellite measurements. Thus, the incorporation of water vapor isotopes into GCMs provides additional constraints on convective parameterizations, especially as more and better quality water vapor isotope measurements become available. Copyright 2009 by the American Geophysical Union.


Global warming, convective threshold and false thermostats

GEOPHYSICAL RESEARCH LETTERS 36 (2009) ARTN L21805

IN Williams, RT Pierrehumbert, M Huber


The impact of methane thermodynamics on seasonal convection and circulation in a model Titan atmosphere

ICARUS 203 (2009) 250-264

JL Mitchell, RT Pierrehumbert, DMW Frierson, R Caballero


The snowball Earth aftermath: Exploring the limits of continental weathering processes

EARTH AND PLANETARY SCIENCE LETTERS 277 (2009) 453-463

G Le Hir, Y Donnadieu, Y Godderis, RT Pierrehumbert, GR Halverson, M Macouin, A Nedelec, G Ramstein


Radiative transfer in CO2-rich paleoatmospheres

JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES 114 (2009) ARTN D18112

I Halevy, RT Pierrehumbert, DP Schrag


Causal or casual link between the rise of nannoplankton calcification and a tectonically-driven massive decrease in Late Triassic atmospheric CO2?

EARTH AND PLANETARY SCIENCE LETTERS 267 (2008) 247-255

Y Godderis, Y Donnadieu, C de Vargas, RT Pierrehumbert, G Dromart, B van de Schootbrugge


Axisymmetric, nearly inviscid circulations in non-condensing radiative-convective atmospheres

QUARTERLY JOURNAL OF THE ROYAL METEOROLOGICAL SOCIETY 134 (2008) 1269-1285

R Caballero, RT Pierrehumbert, JL Mitchell


Data discrepancies in solar-climate link.

Science (New York, N.Y.) 320 (2008) 746-

RT Pierrehumbert


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 (2008) A315-A315

Y Godderis, Y Donnadieu, C De Vargas, RT Pierrehumbert, G Dromart, BV De Schootbrugge


On the relative humidity of the atmosphere

in The Global Circulation of the Atmosphere, Princeton University Press (2007) 6

RT Pierrehumbert


Intercomparison of tropical tropospheric humidity in GCMs with AMSU-B water vapor data

GEOPHYSICAL RESEARCH LETTERS 34 (2007) ARTN L17812

H Brogniez, RT Pierrehumbert


Investigating plausible mechanisms to trigger a deglaciation from a hard snowball Earth

COMPTES RENDUS GEOSCIENCE 339 (2007) 274-287

G Le Hir, G Ramstein, Y Donnadieu, RT Pierrehumbert


An ocean of air: A natural history of the atmosphere

NATURE 447 (2007) 911-911

RT Pierrehumbert

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