1-1-1-1-1-1-1-1-1-1-1-1-1-1 From: Silvana Hidalgo <shidalgo@xxxxxxxxxxxx> *Dear all,* *We hope this mail finds you well despite the difficult situation that the world is going through. We kindly invite you to submit your abstracts to the following EGU session. The EGU 2021 conference will be fully online, so we think it is an opportunity to show our work without the concern of financial support for travelling.* *Kind regards,* *Silvana* *GMPV9.2 [image: EDI] <https://www.egu.eu/news/689/egu-announces-new-edi-logo-for-the-2021-general-assembly/>* *Long-term observation of volcanic degassing: methods, findings and challenges* Convener: Silvana Hidalgo <https://meetingorganizer.copernicus.org/EGU21/session/39470#> | Co-conveners: Santiago ArellanoECS <https://meetingorganizer.copernicus.org/EGU21/session/39470#>, Christoph Kern <https://meetingorganizer.copernicus.org/EGU21/session/39470#>, Agnes Mazot <https://meetingorganizer.copernicus.org/EGU21/session/39470#>, Sebastien Valade Volcanic degassing plays a central role in the dynamics of volcanic activity, both during and between eruptions. In order to understand longer term trends and to detect transitions in the style of volcanic activity it is necessary to sustain permanent monitoring of the composition and flux of different volcanic gases over several years. Only during the last few decades has this task been attainable due to the implementation of a growing suite of instrument networks or global observing systems around volcanoes, for example through in-situ or remote sensing techniques around volcanoes or by space-based sensors. The aim of this session is to gather contributions from long term (>1year) instrumental records of volcanic degassing that show unique information that can only be obtained by long-term observation of volcanic emissions. This includes presentations of technological advancements with proven capabilities for long-term operation, as well as findings obtained from these records, which are relevant for understanding volcanic activity or to assess the impact of emissions on the environment, or to quantify global geochemical cycles of volcanogenic species. We also welcome discussions regarding challenges posed by long-term monitoring of volcanic emissions. 1-1-1-1-1-1-1-1-1-1-1-1-1-1 ------------------------------
