Date of Award

2021

Document Type

Dissertation

Degree Name

Ph.D.

Department

Mechanical Engineering

First Advisor

James C. Wilson

Second Advisor

Brian Majestic

Third Advisor

Corinne Lengsfeld

Fourth Advisor

Yun-Bo Yi

Keywords

Aerosols, Counting statistics (Poisson statistics), Detection efficiency, New particle formation, Size distributions, Trace species

Abstract

New particle formation (NPF) is investigated using measurements of aerosol size distributions and meteorological variables made in two continents, including USA and Europe. Despite the considerably different aerosol particle abundances among the sites, a common relationship was found between the characteristics of NPF events and the air mass convective and/or advective transport. CO and O3 act as tracers of tropospheric and stratospheric air, respectively, their statistical relationship can be used to quantify air mass characteristics and origins. The mixing ratio values of CO increased within the upper troposphere layer before/during NPF events, which may serve as an indicator of occurring the nucleation bursts if the other required conditions of NPF occurrence were existing. As examples, within the tropics, SO2 can be transported from the boundary layer to UT heights by deep convection and interestingly, tropical air masses were transported to the Arctic area by rapid meridional transport.

Publication Statement

Copyright is held by the author. User is responsible for all copyright compliance.

Provenance

Received from ProQuest

Rights holder

Mohamed Saad

File size

127 pgs

File format

application/pdf

Language

en

Discipline

Materials science, Climate change, Condensed matter physics

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