The Effect of El Chichon on Wind Variability in the Troposphere, Stratosphere and Mesosphere Over Alaska Article - Septembre 1985

Ben B. Balsley, René Garello

Ben B. Balsley, René Garello, « The Effect of El Chichon on Wind Variability in the Troposphere, Stratosphere and Mesosphere Over Alaska  », Geophysical Research Letters, septembre 1985, pp. 581 - 584. ISSN 0094-8276

Abstract

Data from the Poker Flat, Alaska MST radar combined with standard NWS balloon observations at Fairbanks, Alaska show that low‐frequency (3‐11 day) wind fluctuations within the troposphere and lower stratosphere for the period January‐March 1983 were noticeably weaker than those for other similar periods between 1979‐1984. Similar effects can be detected in the higher‐frequency (1‐6 hr and 8‐48 hr) wind fluctuations obtained from the radar data alone. In contrast to these decreases in the troposphere and lower stratosphere wind variations, the magnitude of the tidal period (8‐48 hr) atmospheric wind fluctuations observed by radar in the mesosphere during June‐July were significantly increased in 1983 relative to surrounding years. All of these variations appear to be reasonably well associated with the presence of enhanced aerosol concentrations in the lower stratosphere following the explosion of El Chichón volcano in April 1982.

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