A stratospheric ozone trends data set for global modeling studies

Abstract

A global stratospheric ozone trends data set is described, providing monthly profile trend estimates derived for the period 1979-1997. SAGE I/II profile trends are used above 20 km outside of polar regions, and results between the tropopause and 20 km are derived by differencing SAGE and TOMS column ozone trends. In polar regions trends are derived from ozone sonde data up to 27 km, using the near-complete profile records at Syowa (69°S) and Resolute (75°N). While these polar ozonesonde trends agree well with TOMS outside of polar night, the Arctic data furthermore indicate significant ozone losses beginning in midwinter (January) that are not observable in TOMS data.