title: Estimating fossil fuel carbon dioxide (ffCO2) emissions  in the Rhine Valley metropolitan region  from local atmospheric observations in Heidelberg
creator: Maier, Fabian Manuel
subject: ddc-530
subject: 530 Physics
description: This cumulative dissertation investigates the potential of radiocarbon (14C)-based and carbon  monoxide (∆CO)-based fossil fuel CO2 (∆ffCO2) estimates from the urban observation site  Heidelberg to deduce the seasonal cycle of the ffCO2 emissions in the Rhine Valley. For  this, the CarboScope inversion system is used to investigate the benefit of few but accurate  14C-based ∆ffCO2 estimates from about 100 hourly flask samples collected in 2019 and 2020,  compared to a continuous ∆CO-based ∆ffCO2 record with about 4 times larger uncertainty.  The urban observation site with large ffCO2 point sources in the vicinity places special  demands on the transport model. Therefore, a method is developed for the high-resolution  Weather Research and Forecasting - Stochastic Time-Inverted Lagrangian Transport model  (WRF-STILT) to represent the effective emission heights of point sources. This work shows  that the 14C-based ∆ffCO2 observations contain the seasonal cycle of the ffCO2 emissions,  but do not lead to robust inversion results. In contrast, the continuous ∆CO-based ∆ffCO2  estimates provide robust and data-driven seasonal cycles that show the distinct COVID-19  signal in 2020 and are suitable for validating the amplitude and phasing of the seasonal cycle  of the emission inventories in the main footprint of Heidelberg.
date: 2023
type: Dissertation
type: info:eu-repo/semantics/doctoralThesis
type: NonPeerReviewed
format: application/pdf
identifier: https://archiv.ub.uni-heidelberg.de/volltextserver/33558/1/Dissertation_Fabian_Maier_final.pdf
identifier: DOI:10.11588/heidok.00033558
identifier: urn:nbn:de:bsz:16-heidok-335585
identifier:   Maier, Fabian Manuel  (2023) Estimating fossil fuel carbon dioxide (ffCO2) emissions in the Rhine Valley metropolitan region from local atmospheric observations in Heidelberg.  [Dissertation]     
relation: https://archiv.ub.uni-heidelberg.de/volltextserver/33558/
rights: info:eu-repo/semantics/openAccess
rights: http://archiv.ub.uni-heidelberg.de/volltextserver/help/license_urhg.html
language: eng