Real-time measurement of volcanic SO2 emissions: validation of a new UV correlation spectrometer (FLYSPEC) |
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| Authors: | Keith A Horton Glyn Williams-Jones Harold Garbeil Tamar Elias A Jeff Sutton Peter Mouginis-Mark John N Porter Steven Clegg |
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| Institution: | (1) Hawaii Institute of Geophysics and Planetology, University of Hawaii at Manoa, 1680 East-West Rd., 504, Honolulu, Hawaii 96822, USA;(2) Department of Earth Sciences, Simon Fraser University, 8888 University Drive, Burnaby, British Columbia, V5A 1S6, Canada;(3) U. S. Geological Survey, Hawaiian Volcano Observatory, Hawaii National Park, P.O. Box 51, 51 Crater Rim Drive, Hawaii, 96718-0051, USA;(4) Department of Geology, University of Hawai'i at Hilo, 200 W. Kawili St., Hilo, Hawaii 96720, USA |
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| Abstract: | A miniaturized, lightweight and low-cost UV correlation spectrometer, the FLYSPEC, has been developed as an alternative for
the COSPEC, which has long been the mainstay for monitoring volcanic sulfur dioxide fluxes. Field experiments have been conducted
with the FLYSPEC at diverse volcanic systems, including Masaya (Nicaragua), Poás (Costa Rica), Stromboli, Etna and Vulcano
(Italy), Villarica (Chile) and Kilauea (USA). We present here those validation measurements that were made simultaneously
with COSPEC at Kilauea between March 2002 and February 2003. These experiments, with source emission rates that ranged from
95 to 1,560 t d−1, showed statistically identical results from both instruments. SO2 path-concentrations ranged from 0 to >1,000 ppm-m with average correlation coefficients greater than r
2=0.946. The small size and low cost create the opportunity for FLYSPEC to be used in novel deployment modes that have the
potential to revolutionize the manner in which volcanic and industrial monitoring is performed. |
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| Keywords: | FLYSPEC Volcanic emissions Ultraviolet correlation spectrometer |
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