Vertical column measurements of the gaseous composition of the tropical stratosphere were made from the NASA DC-8 aircraft early in 1992. As anticipated, the burdens of the stratospheric source gases (e.g., O3, HF, HCl, ClNO3, HNO3) were reduced from their mid-latitude values due to increased uplift and photolysis. The tracers revealed considerably more uplift near the equator than the sub-tropics. For example, the HF burdens at ¿20¿ latitude (0.50¿1015 molec. cm-2) were nearly double those at 5¿N (0.2715 molec. cm-2). This, together with results obtained from other long-lived gases (e.g., N2O, CH4, CF2CL2) indicates that volume mixing ratios found at 22 km altitude at mid-latitudes occurred at 26 km in the sub-tropics and at 30 km in the equatorial zone. This zone of uplift was symmetrical about the equator even though the sun was overhead at 20¿S. ¿ American Geophysical Union 1993