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Look up: probing the vertical profile of new particle formation and growth in the planetary boundary layer with models and observations

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dc.contributor.authorO'Donnell, Samuel, author
dc.contributor.authorPierce, Jeffrey, advisor
dc.contributor.authorJathar, Shantanu, committee member
dc.contributor.authorKreidenweis, Sonia, committee member
dc.date.accessioned2022-08-29T10:16:20Z
dc.date.available2022-08-29T10:16:20Z
dc.date.issued2022
dc.description.abstractThe processes of new particle formation (NPF) and growth are important contributors to cloud condensation nuclei (CCN) concentrations, and CCN are important for climate from their impact on planetary radiative forcing. While the general ubiquity and importance of NPF is understood, the vertical extent and governing mechanisms of NPF and growth in the lower troposphere are uncertain. We present a two-part analysis of the vertical profile of NPF during the HI-SCALE field campaign at the Southern Great Plains observatory in Oklahoma, USA. Firstly, we analyzed airborne and ground-based observations of four NPF events. Secondly, we used a column aerosol chemistry and microphysics model, along with the observations, to probe factors that influence the vertical profile of NPF. During HI-SCALE, we found several instances of enhanced NPF occurring several hundred meters above the surface; however, the spatio-temporal characteristics of the observed NPF made comparisons between airborne- and ground-based observations difficult. For six unique events, the model represented the observed NPF (or lack of NPF) and particle growth at the surface to within 10 nm. The model predicted enhanced NPF rates in the upper mixed layer, and this enhancement is primarily due to the temperature dependence in the NPF schemes. The simulations were sensitive to the initial vertical profile of gas-phase species from HI-SCALE, such that vertical mixing in the model either enhanced or suppressed NPF rates, aerosol number concentrations, and particle growth rates at the surface. Finally, our analysis provides insights for future field campaigns and modeling efforts investigating the vertical profile of NPF.
dc.format.mediumborn digital
dc.format.mediummasters theses
dc.identifierODonnell_colostate_0053N_17395.pdf
dc.identifier.urihttps://hdl.handle.net/10217/235644
dc.languageEnglish
dc.language.isoeng
dc.publisherColorado State University. Libraries
dc.relation.ispartof2020-
dc.rightsCopyright and other restrictions may apply. User is responsible for compliance with all applicable laws. For information about copyright law, please see https://libguides.colostate.edu/copyright.
dc.subjectclimate
dc.subjectnucleation
dc.subjectSOA
dc.subjectNPF
dc.subjectaerosol
dc.subjectPBL
dc.titleLook up: probing the vertical profile of new particle formation and growth in the planetary boundary layer with models and observations
dc.typeText
dcterms.rights.dplaThis Item is protected by copyright and/or related rights (https://rightsstatements.org/vocab/InC/1.0/). You are free to use this Item in any way that is permitted by the copyright and related rights legislation that applies to your use. For other uses you need to obtain permission from the rights-holder(s).
thesis.degree.disciplineAtmospheric Science
thesis.degree.grantorColorado State University
thesis.degree.levelMasters
thesis.degree.nameMaster of Science (M.S.)

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