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AGU: Geophysical Research Letters

 

Index Terms

  • Information Related to Geographic Region: Antarctica
  • Meteorology and Atmospheric Dynamics: Mesospheric dynamics
  • Meteorology and Atmospheric Dynamics: Middle atmosphere dynamics
  • Meteorology and Atmospheric Dynamics: Polar meteorology

Abstract

GEOPHYSICAL RESEARCH LETTERS, VOL. 29, 1709, 4 PP., 2002
doi:10.1029/2002GL015244

Wintertime mesopause temperatures observed by lidar measurements over Syowa station (69°S, 39°E), Antarctica

T. D. Kawahara

Faculty of Engineering, Shinshu University, Nagano, Japan

T. Kitahara

Faculty of Engineering, Shinshu University, Nagano, Japan

F. Kobayashi

Faculty of Engineering, Shinshu University, Nagano, Japan

Y. Saito

Faculty of Engineering, Shinshu University, Nagano, Japan

A. Nomura

Faculty of Engineering, Shinshu University, Nagano, Japan

C.-Y. She

Department of Physics, Colorado State University, Fort Collins, CO, USA

David A. Krueger

Department of Physics, Colorado State University, Fort Collins, CO, USA

M. Tsutsumi

National Institute of Polar Research, Tokyo, Japan

A sodium lidar at Syowa station (69°S, 39°E), Antarctica, measured temperature profiles from 80 to 110 km between March and September during 2000 and 2001. Monthly averaged temperature profiles in the mesopause region in wintertime (June, July and August) are nearly 20 K lower than those in the northern hemisphere sites. The measured winter mesopause altitudes (∼99 km) are in good agreement with those measured at Fort Collins (41°N) and Andøya (69°N) in winter. The mesopause temperatures (∼175 K) in winter months however are about 20 K lower than those observed from a northern hemisphere conjugate site, Andøya. The lower winter mesopause temperatures measured at Syowa station, which are consistent with southern hemisphere mesopause temperatures measured by a shipborne lidar, suggest the existence of a hemispheric difference. Possible causes for this difference are discussed.

Published 1 August 2002.

Citation: Kawahara, T. D., T. Kitahara, F. Kobayashi, Y. Saito, A. Nomura, C.-Y. She, D. A. Krueger, and M. Tsutsumi (2002), Wintertime mesopause temperatures observed by lidar measurements over Syowa station (69°S, 39°E), Antarctica, Geophys. Res. Lett., 29(15), 1709, doi:10.1029/2002GL015244.

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