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Geophysical Monograph Series

 

Keywords

  • Stratosphere
  • Whirlwinds
  • Dynamic meteorology
  • stratosphere
  • temperature
  • trends
  • watervapor
  • climate
  • variability

Index Terms

  • 3305 Atmospheric Processes: Climate change and variability
  • 3334 Atmospheric Processes: Middle atmosphere dynamics
  • 3362 Atmospheric Processes: Stratosphere/troposphere interactions

Article

GEOPHYSICAL MONOGRAPH SERIES, VOL. 190, PP. 123-135, 2010

Variability and trends in stratospheric temperature and water vapor

W. J. Randel

Long-term variability and trends in global stratospheric temperature are described, based on radiosonde observations since the 1960s and satellite measurements since 1979. New radiosonde-based data sets are available that include adjustments for instrumental inhomogeneities, and these data show good agreement with satellite measurements in the lower stratosphere. The stratosphere exhibits well-known transient warming linked to large volcanic eruptions, plus long-term cooling with magnitudes ∼−0.5 K/decade in the lower stratosphere to ∼−1.2 K/decade in the upper stratosphere. Observations of stratospheric water vapor are also analyzed, based on satellite measurements for 1993–2010. Observed interannual variability is dominated by the quasi-biennial oscillation, plus a step-like drop after 2001. For the observed satellite record, variability in stratospheric water vapor is closely tied to temperature anomalies near the equatorial cold point tropopause.

Citation: Randel, W. J. (2010), Variability and trends in stratospheric temperature and water vapor, in The Stratosphere: Dynamics, Transport, and Chemistry, Geophys. Monogr. Ser., vol. 190, edited by L. M. Polvani, A. H. Sobel, and D. W. Waugh, pp. 123–135, AGU, Washington, D. C., doi:10.1029/2009GM000870.

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