eprintid: 31922
rev_number: 16
eprint_status: archive
userid: 6829
dir: disk0/00/03/19/22
datestamp: 2022-08-08 13:14:21
lastmod: 2022-08-23 10:37:51
status_changed: 2022-08-08 13:14:21
type: doctoralThesis
metadata_visibility: show
creators_name: Kuhn, Jonas
title: Novel approaches to the analysis of volcanic degassing
subjects: ddc-500
subjects: ddc-530
subjects: ddc-540
subjects: ddc-550
divisions: i-130500
adv_faculty: af-13
keywords: Vulkangase, Hochtemperaturchemie, kinetische Chemiemodellierung
cterms_swd: Vulkanologie
cterms_swd: Fernerkundung
cterms_swd: Atmosphäre
abstract: Volcanic gases are part of the fundamental geochemical cycles on Earth. They provide information on the planet’s interior and influence the climate and the oxidation state of the atmosphere.
However, there remain severe inconsistencies between field observations and models within the field
of volcanic gas analysis. This cumulative thesis aims to improve the understanding of volcanic degassing processes by combining three different but related approaches: (1) A model for the chemical
kinetics within the early turbulent mixing process of hot magmatic gases with atmospheric air is
developed. It questions conventional approaches that assume thermodynamic equilibrium during
the gas emission phase and, hence, has severe implications for current interpretations of volcanic
gas measurements. (2) A high-resolution spectrograph is conceptualised and developed. The resolving power of ca. 100000 exceeds that of conventional field-deployable instruments by more than two
orders of magnitude. Its high light throughput and mobility enables a range of new volcanic measurements, such as the quantification of the hydroxyl radical, which is an important intermediate
species in hot volcanic gases. (3) A novel imaging technique for volcanic trace gases is developed.
It significantly enhances the accuracy of volcanic volatile flux quantification and shows great potential for spatially resolving the still poorly constrained halogen conversion processes within volcanic
plumes. Prototypes of both instrument developments demonstrate their anticipated performance
in field measurements. The techniques introduced in this thesis also exhibit extensive potential for
further atmospheric remote sensing applications including improved measurements of greenhouse
gases, air pollutants, atmospheric oxidants, or plant fluorescence.
date: 2022
id_scheme: DOI
id_number: 10.11588/heidok.00031922
ppn_swb: 1814997938
own_urn: urn:nbn:de:bsz:16-heidok-319220
date_accepted: 2022-05-12
advisor: HASH(0x55fc36c56a50)
language: eng
bibsort: KUHNJONASNOVELAPPRO2022
full_text_status: public
place_of_pub: Heidelberg
citation:   Kuhn, Jonas  (2022) Novel approaches to the analysis of volcanic degassing.  [Dissertation]     
document_url: https://archiv.ub.uni-heidelberg.de/volltextserver/31922/1/Doktorarbeit_Jonas_Kuhn_2022_Volcanic_Degassing.pdf