Regensburg 2007 – wissenschaftliches Programm

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UP: Fachverband Umweltphysik

UP 16: Atmosphärische Spurengase und Aerosole: Instrumentelles

UP 16.6: Vortrag

Dienstag, 27. März 2007, 17:30–17:45, H48

Network for Observation of Volcanic and Atmospheric Change (NOVAC) * Remote sensing of volcanic emissions — •Christoph Kern¹, Bo Galle², and Ulrich Platt¹ — ¹Institut für Umweltphysik, Universität Heidelberg, Heidelberg, Germany — ²Chalmers University of Technology, Gothenburg, Sweden

NOVAC is an EU funded project with the aim to establish a global network of stations for the quantitative measurement of volcanic gas emissions. In this project, miniature spectrometers are used to measure scattered light penetrating volcanic plumes. The measured spectra are evaluated using the principle of Differential Optical Absorption Spectroscopy (DOAS). Primarily, the instruments will be used to provide new parameters in the toolbox of the observatories for risk assessment, gas emission estimates and geophysical research on the local scale. In addition, data will be exploited for other scientific purposes e.g. stratospheric ozone depletion studies. Global estimates of volcanic gas emissions and large scale volcanic correlations will be much improved, as the instruments will also allow the large scale validation of satellite instruments, thus bringing the observation of volcanic gas emissions from space a significant step forward. Currently, scanning Mini-DOAS instruments are being permanently installed at 18 volcanoes worldwide. This presentation will focus on the advantages of the novel instrument, the measurement techniques developed specifically for volcanic emission studies using DOAS remote sensing, and include first results of emission measurements obtained at various volcanoes in the scope of the NOVAC project.