Lidar observations of the mesopause region temperature structure at Urbana

R. E. Bills, C. S. Gardner

Research output: Contribution to journalArticlepeer-review


The temperature structure in the 80- to 105-km region exhibited strong variability due to the influence of gravity waves, tides, and sporadic Na layers (Nas). Extreme temperatures of 140 K and 255 K at 90 km were observed. A cooling rate of 8K/month was exhibited from winter to summer at 85-90 km, and in late May and early June a well-defined cold mesopause formed near 85 km with temperatures typically between 150 and 165 K. This mesopause structure produced an associated enhancement in the Brunt-Vaisala frequency near 90 km. -from Authors

Original languageEnglish (US)
Pages (from-to)1011-1021
Number of pages11
JournalJournal of Geophysical Research
Issue numberD1
StatePublished - 1993
Externally publishedYes

ASJC Scopus subject areas

  • Geophysics
  • Forestry
  • Oceanography
  • Aquatic Science
  • Ecology
  • Water Science and Technology
  • Soil Science
  • Geochemistry and Petrology
  • Earth-Surface Processes
  • Atmospheric Science
  • Earth and Planetary Sciences (miscellaneous)
  • Space and Planetary Science
  • Palaeontology


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