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AGU: Geophysical Research Letters

 

Index Terms

  • Atmospheric Composition and Structure: Middle atmosphere—composition and chemistry
  • Atmospheric Composition and Structure: Aerosols and particles
  • Meteorology and Atmospheric Dynamics: Polar meteorology

Abstract

GEOPHYSICAL RESEARCH LETTERS, VOL. 29, 1184, 4 PP., 2002
doi:10.1029/2001GL014147

Satellite observation of dehydration in the Arctic Polar stratosphere

L. L. Pan

National Center for Atmospheric Research, Boulder, CO, USA

W. J. Randel

National Center for Atmospheric Research, Boulder, CO, USA

H. Nakajima

National Institute for Environmental Studies, Tsukuba, Japan

S. T. Massie

National Center for Atmospheric Research, Boulder, CO, USA

H. Kanzawa

National Institute for Environmental Studies, Tsukuba, Japan

Y. Sasano

National Institute for Environmental Studies, Tsukuba, Japan

T. Yokota

National Institute for Environmental Studies, Tsukuba, Japan

T. Sugita

National Institute for Environmental Studies, Tsukuba, Japan

S. Hayashida

Nara Women's University, Nara, Japan

S. Oshchepkov

National Institute for Environmental Studies, Tsukuba, Japan

We report the first space-borne observation of dehydration in the Arctic polar stratosphere. In January 1997, the Improved Limb Atmospheric Spectrometer (ILAS) observed up to ∼3 ppmv water vapor reduction during ice cloud formation and ∼2 ppmv permanent removal of water vapor, mostly at altitudes between 23 and 26 km. In some cases, the dehydrated air was downwind from mountain wave induced Polar Stratospheric Cloud (PSC) events. Furthermore, simultaneous observations of HNO3 and H2O show that the gas phase reduction of HNO3 in the Arctic (January 1997) was much smaller than that observed in the Antarctic (June 1997) when a similar level of water vapor reduction occurred.

Published 18 April 2002.

Citation: Pan, L. L., W. J. Randel, H. Nakajima, S. T. Massie, H. Kanzawa, Y. Sasano, T. Yokota, T. Sugita, S. Hayashida, and S. Oshchepkov (2002), Satellite observation of dehydration in the Arctic Polar stratosphere, Geophys. Res. Lett., 29(8), 1184, doi:10.1029/2001GL014147.

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