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Water, Salt, Organics, and Minerals:...

Li, Xiaohan.

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Water, Salt, Organics, and Minerals: Improved Understanding of Aerosol Microphysics From a Nanoscale Basis.

Record Type:	Electronic resources : Monograph/item
Title/Author:	Water, Salt, Organics, and Minerals: Improved Understanding of Aerosol Microphysics From a Nanoscale Basis./
Author:	Li, Xiaohan.
Published:	Ann Arbor : ProQuest Dissertations & Theses, : 2023,
Description:	183 p.
Notes:	Source: Dissertations Abstracts International, Volume: 85-04, Section: B.
Contained By:	Dissertations Abstracts International85-04B.
Subject:	Atmospheric sciences. -
Online resource:	https://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=30524310
ISBN:	9798380413763

Water, Salt, Organics, and Minerals: Improved Understanding of Aerosol Microphysics From a Nanoscale Basis.
Li, Xiaohan.

Water, Salt, Organics, and Minerals: Improved Understanding of Aerosol Microphysics From a Nanoscale Basis. - Ann Arbor : ProQuest Dissertations & Theses, 2023 - 183 p.

Source: Dissertations Abstracts International, Volume: 85-04, Section: B.

Thesis (Ph.D.)--Princeton University, 2023.

Aerosols are liquid and solid particles suspended in the atmosphere that significantly impact human health, the environment, and the climate. However, current models used to characterize aerosols in air quality and climate studies are considerably uncertain, mainly due to a lack of understanding of aerosol microphysical processes, especially at the nanometer scale, including new particle formation, condensational growth, and activation. This thesis aims to reduce these uncertainties by investigating the impact of water, a crucial yet poorly understood constituent, on nano-aerosol microphysical properties using molecular dynamics (MD) simulations. Specifically, this thesis systematically examines the kinetic and energetic properties of sea salt, organic, and dust aerosols at the nanometer scale. This thesis also establishes a methodological framework for using MD simulations to examine the kinetic and energetic properties of nano-aerosol droplets with highly fluctuating interfaces and various morphologies. New results obtained in this study are used to identify limitations of classical theories (e.g., the Kelvin equation and Kohler theory) at sub-4 nm scales and develop parametric models of water properties in organic aerosols at different sizes and relative humidity (RH) conditions. One particularly notable conclusion is that the distinct properties of water in sub-4 nm scale clusters can enhance new particle formation of organic aerosols by 3 orders of magnitude at RH > 80 %. In the case of mineral dust aerosols, results obtained in the work provide key information required to differentiate mineral-water interactions by mineral type and parameterize the hygroscopic growth accordingly. Overall, the new fundamental insight on aerosol-water microphysics generated in this thesis can help reduce significant uncertainties in the abundance of aerosol cloud condensation nuclei and in the evolution and transport of mineral dust aerosols, thus enabling more accurate predictions of the impact of aerosols on Earth's climate and on human health.

ISBN: 9798380413763Subjects--Topical Terms:

3168354
Atmospheric sciences.
Subjects--Index Terms:

Aerosol microphysics

Water, Salt, Organics, and Minerals: Improved Understanding of Aerosol Microphysics From a Nanoscale Basis.
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245 1 0 $a Water, Salt, Organics, and Minerals: Improved Understanding of Aerosol Microphysics From a Nanoscale Basis.
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300 $a 183 p.
500 $a Source: Dissertations Abstracts International, Volume: 85-04, Section: B.
500 $a Advisor: Bourg, Ian C.
502 $a Thesis (Ph.D.)--Princeton University, 2023.
520 $a Aerosols are liquid and solid particles suspended in the atmosphere that significantly impact human health, the environment, and the climate. However, current models used to characterize aerosols in air quality and climate studies are considerably uncertain, mainly due to a lack of understanding of aerosol microphysical processes, especially at the nanometer scale, including new particle formation, condensational growth, and activation. This thesis aims to reduce these uncertainties by investigating the impact of water, a crucial yet poorly understood constituent, on nano-aerosol microphysical properties using molecular dynamics (MD) simulations. Specifically, this thesis systematically examines the kinetic and energetic properties of sea salt, organic, and dust aerosols at the nanometer scale. This thesis also establishes a methodological framework for using MD simulations to examine the kinetic and energetic properties of nano-aerosol droplets with highly fluctuating interfaces and various morphologies. New results obtained in this study are used to identify limitations of classical theories (e.g., the Kelvin equation and Kohler theory) at sub-4 nm scales and develop parametric models of water properties in organic aerosols at different sizes and relative humidity (RH) conditions. One particularly notable conclusion is that the distinct properties of water in sub-4 nm scale clusters can enhance new particle formation of organic aerosols by 3 orders of magnitude at RH > 80 %. In the case of mineral dust aerosols, results obtained in the work provide key information required to differentiate mineral-water interactions by mineral type and parameterize the hygroscopic growth accordingly. Overall, the new fundamental insight on aerosol-water microphysics generated in this thesis can help reduce significant uncertainties in the abundance of aerosol cloud condensation nuclei and in the evolution and transport of mineral dust aerosols, thus enabling more accurate predictions of the impact of aerosols on Earth's climate and on human health.
590 $a School code: 0181.
650 4 $a Atmospheric sciences. $3 3168354
650 4 $a Atmospheric chemistry. $3 544140
650 4 $a Environmental science. $3 677245
650 4 $a Environmental engineering. $3 548583
653 $a Aerosol microphysics
653 $a Aerosol water interaction
653 $a Mineral dust
653 $a Molecular dynamics simulation
653 $a Nanodroplet
653 $a New particle formation
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690 $a 0768
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773 0 $t Dissertations Abstracts International $g 85-04B.
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791 $a Ph.D.
792 $a 2023
793 $a English
856 4 0 $u https://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=30524310