HR: 08:00h
AN: V41A-01    [Abstracts]
TI: Recent Developments in Monitoring of Gas and Ash in Volcanic Plumes by Remote Sensing Techniques
AU: * Arellano, S R
EM: sarellano@igepn.edu.ec
AF: Instituto Geofisico, Escuela Politecnica Nacional, Ladron de Guevara E11-253 y Andalucia, Quito, 17-01-2759, Ecuador
AB: Since the 1970s, a growing list of methods for the remote detection and measurement of the composition and dynamics of volcanic plumes has been available for volcanologists and atmospheric scientists. During the last decade of intensive volcanic activity in Ecuador, the use of spectroscopic techniques like COSPEC, DOAS or FTIR has become an important tool in routine volcano monitoring which has resulted in a better understanding of source and path processes related to volcanogenic gas and ash emissions with increasing spatial-temporal resolution capabilities. The most important developments achieved with these techniques include the incorporation of radiative transfer and diffusion modelling in automatic data processing routines. In addition, work is being done to identify and quantitatively estimate the presence of ash by means of UV spectroscopy. The use of these methods allowed us to follow the degassing process of Tungurahua volcano with unprecedented detail. A brief description of these improvements and their results are presented.
DE: 0305 Aerosols and particles (0345, 4801, 4906)
DE: 0360 Radiation: transmission and scattering
DE: 0520 Data analysis: algorithms and implementation
DE: 7280 Volcano seismology (8419)
DE: 8419 Volcano monitoring (7280)
SC: Volcanology, Geochemistry, and Petrology [V]
MN: 2007 Joint Assembly