Upper stratospheric temperature climatology derived from SAGE II observations: preliminary results

Pi-Huan Wang; Derek M. Cunnold; H. J. Wang; William P. Chu; Larry W. Thomason

doi:10.1117/12.373063

8 December 1999 Upper stratospheric temperature climatology derived from SAGE II observations: preliminary results

Pi-Huan Wang, Derek M. Cunnold, H. J. Wang, William P. Chu, Larry W. Thomason

Proceedings Volume 3867, Satellite Remote Sensing of Clouds and the Atmosphere IV; (1999) https://doi.org/10.1117/12.373063
Event: Remote Sensing, 1999, Florence, Italy

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.

Citation Download Citation

Pi-Huan Wang, Derek M. Cunnold, H. J. Wang, William P. Chu, and Larry W. Thomason "Upper stratospheric temperature climatology derived from SAGE II observations: preliminary results", Proc. SPIE 3867, Satellite Remote Sensing of Clouds and the Atmosphere IV, (8 December 1999); https://doi.org/10.1117/12.373063

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