Changes in stratospheric aerosol parameters over 105-135°E longitude due to eruption of Mount Pinatubo

Lin N-H, V. K. Saxena

研究成果: 雜誌貢獻期刊論文同行評審


The eruption of Mt Pinatubo (15.14°N, 120.35°E) in the Philippines on 15 June 1991 produced the largest volcanic effluents into the stratosphere as observed by satellite measurements. In this paper we demonstrate the application of an inversion technique to satellite observations to infer the stratospheric aerosol size distributions before and after the eruption. The U.S.A. NASA SAGE (Stratospheric Aerosol and Gas Experiment) II satellite data were used. As a result, the stratospheric aerosol size distributions were found to be bimodal due to the addition of larger particles from Mt Pinatubo ejection. In addition, aerosol parameters such as extinction coefficient, effective radius, total surface area, and mass loading were used to track the northward and southward dispersion of Pinatubo volcanic plume unmistakably. For example, by 18 July 1991, the Pinatubo plume had reached as high as 22 km in the stratosphere above Taiwan area. The extinction profiles for September and October 1991 cases were enhanced about two orders in magnitude at the altitude of 20-24 km owing to Pinatubo aerosols. Regarding the transport in the southern hemisphere, for five months after eruption, the plume had reached the Antarctic stratosphere, and dispersed vertically as high as 40 km. In middle Antarctic stratosphere, the aerosol extinctions were increased in general by an order of 103-105 due to the intrusion of Pinatubo plume. The second mode at 0.5 μm was found compared with the one at less than 0.1 μm, generally found in background stratosphere.

頁(從 - 到)697-712
期刊Journal of Aerosol Science
出版狀態已出版 - 6月 1997


深入研究「Changes in stratospheric aerosol parameters over 105-135°E longitude due to eruption of Mount Pinatubo」主題。共同形成了獨特的指紋。