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Proceedings Paper

Upper stratospheric temperature climatology derived from SAGE II observations: preliminary results
Author(s): Pi-Huan Wang; Derek M. Cunnold; H. J. Wang; William P. Chu; Larry W. Thomason
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Paper Abstract

This study shows that the temperature information in the upper stratosphere can be derived from the SAGE II 385-nm observations. The preliminary results indicate that the zonal mean temperature increases with altitude below 50 km and decreases above 50 km. At 50 km, a regional maximum of 263 K is located in the tropics, and a minimum of 261 K occurs in the subtropics in both hemispheres. The derived long-term temperature changes from 1985 to 1997 reveal a statistically significant negative trend of -2 to -2.5 K/decade in the tropical upper stratosphere and about -2 K/decade in the subtropics near the stratopause. At latitudes poleward of 50 degrees, the results show a statistically significant positive trend of about 1 K/decade in the upper stratosphere. The preliminary results also show large annual temperature oscillations in the extratropics with a maximum amplitude of approximately 8 K located at about 44 km near 50 degrees in both hemispheres during local summer. In addition, the semiannual oscillation is found to be a maximum in the tropics with a peak amplitude of approximately 3.3 K located at about 42 km during the equinox.

Paper Details

Date Published: 8 December 1999
PDF: 10 pages
Proc. SPIE 3867, Satellite Remote Sensing of Clouds and the Atmosphere IV, (8 December 1999); doi: 10.1117/12.373063
Show Author Affiliations
Pi-Huan Wang, Science and Technology Corp. (United States)
Derek M. Cunnold, Georgia Institute of Technology (United States)
H. J. Wang, Georgia Institute of Technology (United States)
William P. Chu, NASA Langley Research Ctr. (United States)
Larry W. Thomason, NASA Langley Research Ctr. (United States)

Published in SPIE Proceedings Vol. 3867:
Satellite Remote Sensing of Clouds and the Atmosphere IV
Jaqueline E. Russell, Editor(s)

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