Titan's atmospheric temperatures, winds, and composition

被引：281

作者：

Flasar, FM

Achterberg, RK

Conrath, BJ

Gierasch, PJ

Kunde, VG

Nixon, CA

Bjoraker, GL

Jennings, DE

Romani, PN

Simon-Miller, AA

Bézard, B

Coustenis, A

Irwin, PGJ

Teanby, NA

Brasunas, J

Pearl, JC

Segura, ME

Carlson, RC

Mamoutkine, A

Schinder, PJ

Barucci, A

Courtin, R

Fouchet, T

Gautier, D

Lellouch, E

Marten, A

Prangé, R

Vinatier, S

Strobel, DF

Calcutt, SB

Read, PL

Taylor, FW

Bowles, N

Samuelson, RE

Orton, GS

Spilker, LJ

Owen, TC

Spencer, JR

Showalter, MR

Ferrari, C

Abbas, MM

Raulin, F

Edgington, S

Ade, P

Wishnow, EH

机构：

[1] NASA, Goddard Space Flight Ctr, Greenbelt, MD 20771 USA

[2] Sci Syst & Applicat, Lanham, MD 20706 USA

[3] Cornell Univ, Dept Astron, Ithaca, NY 14853 USA

[4] Univ Maryland, Dept Astron, College Pk, MD 20742 USA

[5] Observ Paris, LESIA, CNRS, UMR 8109, F-91925 Meudon, France

[6] Univ Oxford, Clarendon Lab, Oxford OX1 3PU, England

[7] QSS Grp, Lanham, MD 20706 USA

[8] Johns Hopkins Univ, Dept Earth & Planetary Sci, Baltimore, MD 21218 USA

[9] CALTECH, Jet Prop Lab, Pasadena, CA 91109 USA

[10] Univ Hawaii, Inst Astron, Honolulu, HI 96822 USA

[11] SW Res Inst, Dept Space Studies, Boulder, CO 80302 USA

[12] Search Extraterr Intelligence Inst, Mountain View, CA 94043 USA

[13] CEA, Serv Astrophys, F-91191 Gif Sur Yvette, France

[14] NASA, George C Marshall Space Flight Ctr, Huntsville, AL 35812 USA

[15] Univ Paris 07, Lab Interuniv Syst Atmospher, CNRS, UMR 7583, F-94010 Creteil, France

[16] Univ Paris 12, Lab Interuniv Syst Atmospher, CNRS, UMR 7583, F-94010 Creteil, France

[17] Univ Cardiff, Dept Phys & Astron, Cardiff CF24 3YB, S Glam, Wales

[18] Lawrence Livermore Natl Lab, Livermore, CA 94551 USA

[19] Univ Calif Berkeley, Space Sci Lab, Livermore, CA 94551 USA

来源：

SCIENCE | 2005年 / 308卷 / 5724期

关键词：

D O I：

10.1126/science.1111150

中图分类号：

O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];

学科分类号：

07 ; 0710 ; 09 ;

摘要：

Temperatures obtained from early Cassini infrared observations of Titan show a stratopause at an altitude of 310 kilometers (and 186 kelvin at 15 degrees S). Stratospheric temperatures are coldest in the winter northern hemisphere, with zonal winds reaching 160 meters per second. 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. Above the south pole, temperatures in the stratosphere are 4 to 5 kelvin cooler than at the equator. The stratospheric mole fractions of methane and carbon monoxide are (1.6 +/- 0.5) x 10(-2) and (4.5 +/- 1.5) x 10(-5), respectively.

引用

页码：975 / 978

页数：4

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