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UP: Fachverband Umweltphysik

UP 12: Methods - Remote Sensing

UP 12.4: Talk

Thursday, March 10, 2016, 12:00–12:15, H41

Quantitative Imaging of Volcanic Plumes, Recent Developments and Future Trends — •Ulrich Platt, Peter Lübcke, Jonas Kuhn, and Nicole Bobrowski — Universität Heidelberg, Deutschland

There are a number of indicators for volcanic activity including seismic events, deformation, and gaseous emissions. While the former two indicators have been routinely monitored at many active volcanoes, long term monitoring of gas fluxes and gas emission is only now becoming a standard approach and thus help to better forecast volcanic events. Recently developed remote sensing techniques allow two-dimensional "imaging" of trace gas distributions in volcanic plumes in real time. In contrast to older, one-dimensional remote sensing techniques, which are only capable of measuring total column densities, the new imaging methods give insight into details of transport- and mixing processes as well as chemical transformation within plumes. We give an overview of gas imaging techniques already being applied at volcanoes (SO2 cameras, imaging DOAS, Fabry-Pérot imaging), present techniques where first field experiments were conducted (LED-LIDAR, tomographic mapping), and describe some techniques where only theoretical studies with application to volcanology exist (e.g. Gas Correlation Spectroscopy, bi-static LIDAR). Finally, we discuss current needs and future trends in gas imaging technology.