P
Pgj Irwin
Researcher at University of Oxford
Publications - 110
Citations - 3359
Pgj Irwin is an academic researcher from University of Oxford. The author has contributed to research in topics: Titan (rocket family) & Stratosphere. The author has an hindex of 32, co-authored 109 publications receiving 3139 citations.
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Journal ArticleDOI
Titan's atmospheric temperatures, winds, and composition
F. M. Flasar,R. K. Achterberg,Barney J. Conrath,Peter J. Gierasch,V. G. Kunde,Conor A. Nixon,Gordon L. Bjoraker,D. E. Jennings,Paul N. Romani,Amy A. Simon-Miller,Bruno Bézard,Athena Coustenis,Pgj Irwin,Nicholas A Teanby,John C. Brasunas,John C. Pearl,M. E. Segura,Ronald Carlson,A. A. Mamoutkine,Paul J. Schinder,Antonella Barucci,Regis Courtin,Thierry Fouchet,Daniel Gautier,Emmanuel Lellouch,A. Marten,R. Prangé,Sandrine Vinatier,Darrell F. Strobel,S. B. Calcutt,Peter L. Read,Fredric W. Taylor,Neil Bowles,Robert E. Samuelson,Glenn S. Orton,Linda Spilker,Tobias Owen,John R. Spencer,Mark R. Showalter,C. Ferrari,Mian M. Abbas,François Raulin,Scott G. Edgington,Peter A. R. Ade,E. H. Wishnow +44 more
TL;DR: Early Cassini infrared observations of Titan show a stratopause at an altitude of 310 kilometers (and 186 kelvin at 15°S), and the concentrations of several stratospheric organic compounds are enhanced at mid- and high northern latitudes, and the strong zonal winds may inhibit mixing between these latitudes and the rest of Titan.
Journal ArticleDOI
Structure and dynamics of the Martian lower and middle atmosphere as observed by the Mars Climate Sounder: Seasonal variations in zonal mean temperature, dust and water ice aerosols
Daniel J. McCleese,Nicholas G. Heavens,John T. Schofield,W. A. Abdou,Joshua L. Bandfield,S. B. Calcutt,Pgj Irwin,David M. Kass,Armin Kleinböhl,Stephen R. Lewis,David A. Paige,Peter L. Read,Mark I. Richardson,James H. Shirley,Fredric W. Taylor,Nicholas A Teanby,Richard W. Zurek +16 more
TL;DR: The first Martian year and a half of observations by the Mars Climate Sounder aboard the Mars Reconnaissance Orbiter has revealed new details of the thermal structure and distributions of dust and water ice in the atmosphere as mentioned in this paper.
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Methane and its isotopologues on Saturn from Cassini/CIRS observations
TL;DR: In this paper, a line-by-line approach was used to evaluate the reliability of the retrieved quantities, which showed no hemispherical asymmetries or latitudinal variability.
Journal ArticleDOI
Vertical profiles of HCN, HC3N, and C2H2 in Titan's atmosphere derived from Cassini/CIRS data
Nicholas A Teanby,Pgj Irwin,R. de Kok,S. Vinatier,Bruno Bézard,Conor A. Nixon,F. M. Flasar,S. B. Calcutt,Neil Bowles,Leigh N. Fletcher,Carly Howett,Fredric W. Taylor +11 more
TL;DR: In this article, the authors used the Composite InfraRed Spectrometer (CIRS) on board the Cassini spacecraft to determine vertical profiles of HCN, HC3N, C2H2, and temperature in Titan's atmosphere.
Journal ArticleDOI
Latitudinal variations of HCN, HC3N, and C2N2 in Titan's stratosphere derived from Cassini CIRS data
Nicholas A Teanby,Pgj Irwin,R. de Kok,Conor A. Nixon,A. Coustenis,Bruno Bézard,S. B. Calcutt,Neil Bowles,F. M. Flasar,Leigh N. Fletcher,Carly Howett,Fredric W. Taylor +11 more
TL;DR: In this paper, the authors used the Composite InfraRed Spectrometer (CIRS) to determine volume mixing ratios of nitriles in Titan's atmosphere, showing a marked increase in abundance towards the north, whereas C2H2 remains relatively constant.