Characterizing the Organic Composition of Marine Aerosol from the North Atlantic to the Oceano Dunes
Atmospheric aerosol particles in the marine environment play an important role in the Earth’s radiative budget which are affected by the sources and compositions of the aerosol particles. Atmospheric aerosol particles were collected over four cruises in the remote regions of the North Atlantic Ocean...
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2022
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ftcdlib:oai:escholarship.org:ark:/13030/qt59x9z4zj 2024-09-15T18:23:02+00:00 Characterizing the Organic Composition of Marine Aerosol from the North Atlantic to the Oceano Dunes Lewis, Savannah Lee Russell, Lynn M. Aluwihare, Lihini I. 2022-01-01 application/pdf https://escholarship.org/uc/item/59x9z4zj https://escholarship.org/content/qt59x9z4zj/qt59x9z4zj.pdf en eng eScholarship, University of California qt59x9z4zj https://escholarship.org/uc/item/59x9z4zj https://escholarship.org/content/qt59x9z4zj/qt59x9z4zj.pdf public Atmospheric chemistry Air pollution FTIR Marine Aerosol NAAMES STXM-NEXAFS etd 2022 ftcdlib 2024-06-28T06:28:18Z Atmospheric aerosol particles in the marine environment play an important role in the Earth’s radiative budget which are affected by the sources and compositions of the aerosol particles. Atmospheric aerosol particles were collected over four cruises in the remote regions of the North Atlantic Ocean and one field experiment from a stationary platform in the Oceano Dunes and were quantified using Fourier Transform Infrared (FTIR) spectroscopy and Scanning Transmission X-Ray Microscopy with Near-Edge Absorption Fine Structure (STXM-NEXAFS) for organic functional groups. X-ray fluorescence (XRF) analyses were used to understand the elemental composition of the Oceano Dunes samples. The four cruises’ atmospheric primary marine aerosol (aPMA) organic functional group composition was compared to see whether seasonal and biological changes had an effect. The average composition was 78% hydroxyl, 10% alkane, 6% amine, and 7% carboxylic acid groups, which was consistent with previous marine studies with sources including marine saccharides and amino sugars. The standard deviation within each season was greater than the differences between seasons, showing a limited seasonal response in the organic fraction. Generated primary marine aerosol particles (gPMA), atmospheric aerosol particles, sea-surface microlayer samples, and seawater samples were collected to compare the particle and bulk organic compositional differences as organics rise through the water column and are ejected into the marine boundary layer. The bulk organic composition consisted of the same three organic functional groups (hydroxyl, alkane, and amine groups) that comprised 50-90% of the quantified organic mass, though STXM-NEXAFS did illuminate the particle-to-particle diversity in all sample sources. The sea-surface microlayer and atmospheric aerosol particles were found to have far more variability in composition than generated primary marine aerosol and seawater, which could be attributed to a closer linkage between the organic sources and greater ... Thesis North Atlantic University of California: eScholarship |
institution |
Open Polar |
collection |
University of California: eScholarship |
op_collection_id |
ftcdlib |
language |
English |
topic |
Atmospheric chemistry Air pollution FTIR Marine Aerosol NAAMES STXM-NEXAFS |
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Atmospheric chemistry Air pollution FTIR Marine Aerosol NAAMES STXM-NEXAFS Lewis, Savannah Lee Characterizing the Organic Composition of Marine Aerosol from the North Atlantic to the Oceano Dunes |
topic_facet |
Atmospheric chemistry Air pollution FTIR Marine Aerosol NAAMES STXM-NEXAFS |
description |
Atmospheric aerosol particles in the marine environment play an important role in the Earth’s radiative budget which are affected by the sources and compositions of the aerosol particles. Atmospheric aerosol particles were collected over four cruises in the remote regions of the North Atlantic Ocean and one field experiment from a stationary platform in the Oceano Dunes and were quantified using Fourier Transform Infrared (FTIR) spectroscopy and Scanning Transmission X-Ray Microscopy with Near-Edge Absorption Fine Structure (STXM-NEXAFS) for organic functional groups. X-ray fluorescence (XRF) analyses were used to understand the elemental composition of the Oceano Dunes samples. The four cruises’ atmospheric primary marine aerosol (aPMA) organic functional group composition was compared to see whether seasonal and biological changes had an effect. The average composition was 78% hydroxyl, 10% alkane, 6% amine, and 7% carboxylic acid groups, which was consistent with previous marine studies with sources including marine saccharides and amino sugars. The standard deviation within each season was greater than the differences between seasons, showing a limited seasonal response in the organic fraction. Generated primary marine aerosol particles (gPMA), atmospheric aerosol particles, sea-surface microlayer samples, and seawater samples were collected to compare the particle and bulk organic compositional differences as organics rise through the water column and are ejected into the marine boundary layer. The bulk organic composition consisted of the same three organic functional groups (hydroxyl, alkane, and amine groups) that comprised 50-90% of the quantified organic mass, though STXM-NEXAFS did illuminate the particle-to-particle diversity in all sample sources. The sea-surface microlayer and atmospheric aerosol particles were found to have far more variability in composition than generated primary marine aerosol and seawater, which could be attributed to a closer linkage between the organic sources and greater ... |
author2 |
Russell, Lynn M. Aluwihare, Lihini I. |
format |
Thesis |
author |
Lewis, Savannah Lee |
author_facet |
Lewis, Savannah Lee |
author_sort |
Lewis, Savannah Lee |
title |
Characterizing the Organic Composition of Marine Aerosol from the North Atlantic to the Oceano Dunes |
title_short |
Characterizing the Organic Composition of Marine Aerosol from the North Atlantic to the Oceano Dunes |
title_full |
Characterizing the Organic Composition of Marine Aerosol from the North Atlantic to the Oceano Dunes |
title_fullStr |
Characterizing the Organic Composition of Marine Aerosol from the North Atlantic to the Oceano Dunes |
title_full_unstemmed |
Characterizing the Organic Composition of Marine Aerosol from the North Atlantic to the Oceano Dunes |
title_sort |
characterizing the organic composition of marine aerosol from the north atlantic to the oceano dunes |
publisher |
eScholarship, University of California |
publishDate |
2022 |
url |
https://escholarship.org/uc/item/59x9z4zj https://escholarship.org/content/qt59x9z4zj/qt59x9z4zj.pdf |
genre |
North Atlantic |
genre_facet |
North Atlantic |
op_relation |
qt59x9z4zj https://escholarship.org/uc/item/59x9z4zj https://escholarship.org/content/qt59x9z4zj/qt59x9z4zj.pdf |
op_rights |
public |
_version_ |
1810463148981878784 |