Thermal Structure and Dynamics of Saturn's Northern Springtime Disturbance

被引：70

作者：

Fletcher, Leigh N. ^{[1
]}

Hesman, Brigette E. ^{[2
]}

Irwin, Patrick G. J. ^{[1
]}

Baines, Kevin H. ^{[3
]}

Momary, Thomas W. ^{[4
]}

Sanchez-Lavega, Agustin ^{[5
]}

Flasar, F. Michael ^{[6
]}

Read, Peter L. ^{[1
]}

Orton, Glenn S. ^{[4
]}

Simon-Miller, Amy ^{[6
]}

Hueso, Ricardo ^{[5
]}

Bjoraker, Gordon L. ^{[6
]}

Mamoutkine, Andrei ^{[6
]}

del Rio-Gaztelurrutia, Teresa ^{[5
]}

Gomez, Jose M. ^{[7
]}

Buratti, Bonnie ^{[4
]}

Clark, Roger N. ^{[8
]}

Nicholson, Philip D. ^{[9
]}

Sotin, Christophe ^{[4
]}

机构：

[1] Univ Oxford, Dept Phys, Clarendon Lab, Oxford OX1 3PU, England

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

[3] Univ Wisconsin, Ctr Space Sci & Engn, Madison, WI 53706 USA

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

[5] Univ Basque Country, Escuela Tecn Super Ingenieros, Dept Fis Aplicada 1, Bilbao 48013, Spain

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

[7] Fdn Esteve Duran, Barcelona, Spain

[8] US Geol Survey, Fed Ctr, Denver, CO 80225 USA

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

来源：

SCIENCE | 2011年 / 332卷 / 6036期

基金：

英国科学技术设施理事会;

关键词：

1990 EQUATORIAL DISTURBANCE; SPACE-TELESCOPE OBSERVATIONS; ZONAL WINDS; ATMOSPHERE;

D O I：

10.1126/science.1204774

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：

Saturn's slow seasonal evolution was disrupted in 2010-2011 by the eruption of a bright storm in its northern spring hemisphere. Thermal infrared spectroscopy showed that within a month, the resulting planetary-scale disturbance had generated intense perturbations of atmospheric temperatures, winds, and composition between 20 degrees and 50 degrees N over an entire hemisphere (140,000 kilometers). The tropospheric storm cell produced effects that penetrated hundreds of kilometers into Saturn's stratosphere (to the 1-millibar region). Stratospheric subsidence at the edges of the disturbance produced "beacons" of infrared emission and longitudinal temperature contrasts of 16 kelvin. The disturbance substantially altered atmospheric circulation, transporting material vertically over great distances, modifying stratospheric zonal jets, exciting wave activity and turbulence, and generating a new cold anticyclonic oval in the center of the disturbance at 41 degrees N.

引用

页码：1413 / 1417

页数：5

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