Pengukuran Emisi SO2 dengan DOAS (Differential Optical Absorption Spectroscopy) dan COSPEC (Correlation Spectroscopy) di Gunung Merapi (Indonesia)
ABSTRACT: The SO2 is one of
the volcanic gases that can use as indicator of volcano activity. Commonly, SO2
emission is measured by COSPEC (Correlation Spectroscopy). This equipment has
several disadvantages; such as heavy, big in size, difficulty in finding spare
part, and expensive. DOAS (Differential Optical Absorption Spectroscopy) is a
new method for SO2 emission measurement that has advantages compares to the
COSPEC. Recently, this method has been developed. The SO2 gas emission
measurement of Gunung Merapi by DOAS has been carried out at Kaliadem, and also
by COSPEC method as comparation. The differences of the measurement result of
both methods are not significant. However, the differences of minimum and
maximum result of DOAS method are smaller than that of the COSPEC. It has range
between 51 ton/day and 87 ton/day for DOAS and 87 ton/day and 201 ton/day for
COSPEC. The measurement of SO2 gas emission evaluated with the seismicity data
especially the rockfall showed the presence of the positive correlation. It may
cause the gas pressure in the subsurface influencing instability of 2006
eruption lava.
Penulis: Hanik Humaida
Kode Jurnal: jpkimiadd080109
