Other
Scientific paper
Nov 1993
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993georl..20.2503t&link_type=abstract
Geophysical Research Letters (ISSN 0094-8276), vol. 20, no. 22, p. 2503-2506
Other
8
Absorption Spectra, Atmospheric Composition, Solar Spectra, Stratosphere, Trace Elements, Airborne Equipment, Fourier Transformation, Photolysis, Remote Sensing, Solar Spectrometers, Tropical Regions
Scientific paper
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 deg latitude were nearly double those at 5 deg N. 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 deg S.
Blavier Jean-François
Solario J. N.
Szeto J. T.
Toon Geoffrey C.
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