Conveners
Atmospheric Processes: AP one
- Ulrich Platt (Institute of Environmental Physics, Heidelberg University, Germany)
- Johann Jacobsohn
The Network for Observation of Volcanic and Atmospheric Change (NOVAC) monitors the SO$_2$ and BrO emissions of more than 40 volcanoes using scanning UV spectrometers. The volcanic gas emissions are retrieved from the recorded spectra by applying Differential Optical Absorption Spectroscopy (DOAS). We present semi-continuous (only during daytime) time series of the slant column densities...
Bromine monoxide (BrO) is a halogen radical altering – inter alia – the atmospheric ozone and radical chemistry. High BrO/SO$_2$ ratio was seen at the outer part of the plume, while in the center region of the plume BrO/SO$_2$ ratios were found to be lower. These measurements obtained from ground-based as well as airborne instruments suggest that the formation of BrO – a secondary product of...
Volcanic eruptions emit bromine-containing species in varying quantities, with their emission ratio to tracer species such SO$_2$ varying between volcanoes, eruptions, and even phases of an eruptive event.
Although primarily emitted as HBr, bromine within volcanic plumes cycles between species in a series of low temperature chemical reactions which include heterogenous and photolysis steps....
Volcanoes are increasingly better monitored around the world. Nonetheless, the detection and monitoring of volcanic ash plumes remains difficult, especially in remote areas. Intense electrical activity and lightning in volcanic plumes suggests that electrical monitoring of active volcanoes can aid the detection of ash emissions in near real-time. Current very low frequency and wide-band...
The question about the origin of life and the emergence of the first organic molecules is still unraveled. Lightning has been considered as a potential energy source for the emergence of life or alternatively as a potential energy source for the synthesis for first organic molecules. One of the most prominent abiotic synthesis experiments are the discharge experiments performed 1953 by Miller...
