| Автор | Caltabiano, Tommaso |
| Автор | Romano, Romolo |
| Автор | Budetta, Gennaro |
| Дата выпуска | 1994 |
| dc.description | Since 1987, over 220 measurements of the SO<sub>2</sub> flux at Mount Etna have been carried out using a correlation spectrometer (COSPEC) with different measuring techniques (mainly with COSPEC mounted on a ground‐based vehicle). This paper reports and analyzes the data obtained between October 1987 and December 1991. During this period, three distinct time intervals characterized by particular SO<sub>2</sub> emission patterns were identified. The first interval (A) showed a mean SO<sub>2</sub> flux of 5500 t/d associated with relatively quiet summit crater eruptive activity. The second interval (B) included two eruptive periods, September–October 1989 and January–February 1990, associated with high fluxes reaching 10,000–25,000 t/d. The third interval (C) started in concert with a regional earthquake (December 13, 1990) and showed first a decrease and then an increase of SO<sub>2</sub> emissions before the onset of the major 1991–1993 flank eruption. Analysis of the data reveals a cyclic pattern to the SO<sub>2</sub> emissions over prolonged periods; a nearly constant supply of SO<sub>2</sub> from the volcano's main feeder system, especially evident in the long term; a two‐ to fivefold increase above mean flux values (from 10,000 to 25,000 t/d) when occurring with paroxysmal eruptive activity; and minimal flux values (∼1000 t/d) about 1 month prior to important eruptive events. |
| Формат | application.pdf |
| Копирайт | Copyright 1994 by the American Geophysical Union. |
| Тема | ATMOSPHERIC COMPOSITION AND STRUCTURE |
| Тема | Aerosols and particles |
| Тема | Pollution: urban and regional |
| Тема | OCEANOGRAPHY: BIOLOGICAL AND CHEMICAL |
| Тема | Aerosols |
| Тема | PALEOCEANOGRAPHY |
| Тема | Aerosols |
| Название | SO<sub>2</sub> flux measurements at Mount Etna (Sicily) |
| Тип | article |
| DOI | 10.1029/94JD00224 |
| Electronic ISSN | 2156-2202 |
| Print ISSN | 0148-0227 |
| Журнал | Journal of Geophysical Research: Atmospheres |
| Том | 99 |
| Первая страница | 12809 |
| Последняя страница | 12819 |
| Выпуск | D6 |
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