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Perturbation in atmospheric charged species after the eruption of Mount Pinatubo

Beig, G (2000) Perturbation in atmospheric charged species after the eruption of Mount Pinatubo. Geophysical Research Letters, 27 (16). pp. 2497-2500.

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This paper presents the results of coupled neutral-ion photochemical model to demonstrate that gas-phase sulfur chemistry played a vital role in perturbations of the stratospheric ion composition following the Pinatubo eruption. Model calculations indicate that immediately after the eruption, the large amount of SO2 injected directly into the tropical stratosphere produced additional sulfuric acid vapor which increased the abundance of heavy negative ion family (called HSO4 - - core) by several orders of magnitude over the ambient. After 2 to 3 months, most of the sulfuric acid vapor gets condensed and converted to HSO4 / H2O droplets (aerosols) and the density of ultrafine charged aerosol (which are driven by aerosol) also increases several folds (~1500) in the tropics for 20-30 km. The perturbation in ionic species was evident even after one year of eruption (which attains a global coverage) but it finally settled down to its background level after about 2 years.

Item Type: Article
Additional Information: Copyright of this article belongs to American Geophysical Union
Uncontrolled Keywords: aerosol; atmospheric chemistry; ionic composition; volcanic eruption, Atmospheric aerosols; Atmospheric composition; Sulfur dioxide; Sulfuric acid; Tropics; Upper atmosphere, Atmospheric charged species; Mount Pinatubo, Atmospheric chemistry
Subjects: Meteorology and Climatology
Depositing User: IITM Library
Date Deposited: 14 Mar 2015 18:38
Last Modified: 14 Mar 2015 18:38

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