Nominations are being accepted for the upcoming April officer elections. This software is particularly applicable to analysis of data from the NASA EOS series of satellites to be launched beginning in 1998. Global stratospheric ozone amounts have been declining since approximately 1980 with appreciable variation in the altitude, latitude, and seasonal dependence of those downward trends. Dramatic polar ozone decreases in the austral springtime continue to occur. The projected changes in CFCs and their substitutes will ameliorate the recent ozone decreases, but return to normal will take in excess of 25 years.
Tropospheric ozone amounts, however, are seen to be increasing in many parts of the world.
The processes controlling tropospheric ozone are different from the stratospheric processes. The effect of present and proposed aircraft fleets is a crucial issue to both tropospheric and stratospheric ozone. This seminar will explain the fundamental controlling processes, the observed and predicted ozone amounts and trends, and highlight some of the current issues in atmospheric ozone trends. An updated copy of the entire seminar schedule can now be seen on the GHCC Homepage.