Monitoring gas emissions of active volcanoes: Identification of natural degassing variations and combination of volcano monitoring techniques.

Bredemeyer, Stefan (2016) Monitoring gas emissions of active volcanoes: Identification of natural degassing variations and combination of volcano monitoring techniques. Open Access (PhD/ Doctoral thesis), Christian-Albrechts-Universität, Kiel, 164 pp.

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Abstract

This thesis is a contribution to the interdisciplinary field of applied volcanology and focuses on the study of volcanic gas emissions by means of ground-based spectroscopic remote sensing techniques. Furthermore it aims at fostering the routine use and integration of such measurements into existing multi-parameter volcano surveillance networks of the involved local volcano observatories. For this purpose continuous long-term monitoring of sulphur dioxide (SO2) emission rates was performed using permanent networks of fully-automated scanning ultraviolet (UV) spectrometers at some of the most active and persistently degassing stratovolcanoes in the volcanic arcs of Chile, Costa Rica and Nicaragua. These measurements yielded detailed time series of SO2 emission rates, which were calculated using differential optical absorption spectroscopy (DOAS) in conjunction with wind transport directions and velocities derived from weather hindcasts of the Global Forecast System (GFS), and delivered insights into the degassing behaviour of the monitored volcanoes.

Document Type: Thesis (PhD/ Doctoral thesis)
Thesis Advisor: Hansteen, Thor H. and Devey, Colin
Additional Information: Jahr der Promotion: 2017
Keywords: Volcano monitoring; Volcanic gases; Sulphur dioxide emission rates; Volcano seismicity; RSAM; Volcano deformation; Earth tides; Wind field analysis; Precipitable water vapour estimates; Radar path delay; scan-DOAS; multi-GAS; InSAR; Global Forecast System; Villarrica; Llaima; Láscar; Lastarria; Putana; San Pedro; Ollagüe; Turrialba; San Cristóbal
Research affiliation: OceanRep > SFB 574
OceanRep > GEOMAR > FB4 Dynamics of the Ocean Floor > FB4-MUHS Magmatic and Hydrothermal Systems
Projects: SFB574, HGF Remote Sensing and Earth System Dynamics Alliance
Date Deposited: 15 Mar 2017 13:35
Last Modified: 01 Sep 2019 23:38
URI: http://oceanrep.geomar.de/id/eprint/37005

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