Previous: Ext. Abst. Next: Problem in the data? Up: Ext. Abst.

Introduction

Trends and interannual variability from radiosondes are hampered by problems of coverage and changing instrumentation. Here, both of these problems are addressed. First, a method is introduced for identifying and correcting instrumentation changes in the temperature record using day-night temperature differences. Second, a new statistical technique (iterative universal kriging) is used to overcome inconsistencies in radiosonde launch schedules and to boostinformation from stations with moderate amounts of data. Together these approaches allow temperature trends and other variations and their uncertainties to be obtained from many stations, giving spatial information. Preliminary analysis of tropical data since 1985 shows substantial cooling in the lower stratosphere but no significant change in the upper troposphere or tropopause. The stratospheric cooling shows an interesting latitude-height pattern. This work is still "in progress."

Previous: Ext. Abst. Next: Problem in the data? Up: Ext. Abst.