R
Ralph D. Lorenz
Researcher at Johns Hopkins University Applied Physics Laboratory
Publications - 665
Citations - 20410
Ralph D. Lorenz is an academic researcher from Johns Hopkins University Applied Physics Laboratory. The author has contributed to research in topics: Titan (rocket family) & Mars Exploration Program. The author has an hindex of 67, co-authored 628 publications receiving 17384 citations. Previous affiliations of Ralph D. Lorenz include University of Southampton & University of Texas at Austin.
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Journal ArticleDOI
The second law of thermodynamics and the global climate system: A review of the maximum entropy production principle
TL;DR: In this article, the long-term mean properties of the global climate system and those of turbulent fluid systems are reviewed from a thermodynamic viewpoint, and two general expressions are derived for a rate of entropy production due to thermal and viscous dissipation (turbulent dissipation) in a fluid system.
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The sand seas of Titan: Cassini RADAR observations of longitudinal dunes.
Ralph D. Lorenz,S. D. Wall,Jani Radebaugh,G. Boubin,E. Reffet,M. A. Janssen,Ellen R. Stofan,Rosaly M. C. Lopes,Randolph L. Kirk,Charles Elachi,Jonathan I. Lunine,Jonathan I. Lunine,K. L. Mitchell,Flora Paganelli,Laurence A. Soderblom,Charles A. Wood,Lauren Wye,Howard A. Zebker,Y. Anderson,Steven J. Ostro,Matthew A. Allison,R. Boehmer,Philip S. Callahan,Pierre Encrenaz,Gian Gabriele Ori,G. Francescetti,Yonggyu Gim,G. Hamilton,Scott Hensley,William L. Johnson,K. Kelleher,Duane O. Muhleman,Giovanni Picardi,Francesco Posa,L. Roth,Roberto Seu,S. Shaffer,Bryan Stiles,S. Vetrella,Enrico Flamini,Robert West +40 more
TL;DR: The most recent Cassini RADAR images of Titan show widespread regions that appear to be seas of longitudinal dunes similar to those seen in the Namib desert on Earth, and the distribution and orientation of the dunes support a model of fluctuating surface winds.
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Initial results from the InSight mission on Mars
W. Bruce Banerdt,Suzanne E. Smrekar,Don Banfield,Domenico Giardini,Matthew P. Golombek,Catherine L. Johnson,Catherine L. Johnson,Philippe Lognonné,Philippe Lognonné,Aymeric Spiga,Aymeric Spiga,Tilman Spohn,Clément Perrin,Simon Stähler,Daniele Antonangeli,Sami W. Asmar,Caroline Beghein,Caroline Beghein,Neil Bowles,Ebru Bozdag,Peter Chi,Ulrich R. Christensen,John Clinton,Gareth S. Collins,Ingrid Daubar,Véronique Dehant,Véronique Dehant,Mélanie Drilleau,Matthew Fillingim,William M. Folkner,Raphaël F. Garcia,James B. Garvin,John A. Grant,Matthias Grott,Jerzy Grygorczuk,Troy L. Hudson,Jessica C. E. Irving,Günter Kargl,Taichi Kawamura,Sharon Kedar,Scott D. King,Brigitte Knapmeyer-Endrun,Martin Knapmeyer,Mark T. Lemmon,Ralph D. Lorenz,Justin N. Maki,Ludovic Margerin,Scott M. McLennan,Chloé Michaut,Chloé Michaut,David Mimoun,Anna Mittelholz,Antoine Mocquet,Paul Morgan,Nils Mueller,Naomi Murdoch,Seiichi Nagihara,Claire E. Newman,Francis Nimmo,Mark P. Panning,W. Thomas Pike,Ana-Catalina Plesa,Sebastien Rodriguez,Sebastien Rodriguez,José Antonio Rodríguez-Manfredi,Christopher T. Russell,Nicholas Schmerr,Matthew A. Siegler,Matthew A. Siegler,Sabine Stanley,Eléanore Stutzmann,Nicholas A Teanby,Jeroen Tromp,Martin van Driel,Nicholas H. Warner,Renee Weber,Mark A. Wieczorek +76 more
TL;DR: For example, the first ten months of the InSight lander on Mars revealed a planet that is seismically active and provided information about the interior, surface and atmospheric workings of Mars as mentioned in this paper.
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Hydrocarbon lakes on Titan: Distribution and interaction with a porous regolith
Alexander G. Hayes,Oded Aharonson,Philip S. Callahan,Charles Elachi,Yonggyu Gim,Randolph L. Kirk,Kevin W. Lewis,Rosaly M. C. Lopes,Ralph D. Lorenz,Jonathan I. Lunine,K. L. Mitchell,Giuseppe Mitri,Ellen R. Stofan,S. D. Wall +13 more
TL;DR: Hayes et al. as discussed by the authors used Huygens probe observations to derive the timescales for flow into and out of observed lakes, similar to seasonal cycles, and compared the time between collocated SAR observations in order to considertheroleofsubsurfacetransportinTitan’shydrologic cycle.
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Cassini radar views the surface of Titan
Charles Elachi,S. D. Wall,Matthew A. Allison,Y. Anderson,R. Boehmer,Philip S. Callahan,Pierre Encrenaz,Enrico Flamini,Giorgio Franceschetti,Yonggyu Gim,G. Hamilton,Scott Hensley,M. A. Janssen,William L. Johnson,K. Kelleher,Randolph L. Kirk,Rosaly M. C. Lopes,Ralph D. Lorenz,Jonathan I. Lunine,Duane O. Muhleman,Steven J. Ostro,Flora Paganelli,Giovanni Picardi,Francesco Posa,L. Roth,Roberto Seu,S. Shaffer,Laurence A. Soderblom,Bryan Stiles,Ellen R. Stofan,S. Vetrella,Robert West,Charles A. Wood,Lauren Wye,Howard A. Zebker +34 more
TL;DR: The Cassini Titan Radar Mapper imaged about 1% of Titan's surface at a resolution of ∼0.5 kilometer, and larger areas of the globe in lower resolution modes, revealing a complex surface, with areas of low relief and a variety of geologic features suggestive of dome-like volcanic constructs, flows, and sinuous channels.