North Atlantic marine organic aerosol characterized by novel offline thermal desorption mass spectrometry approach: polysaccharides, recalcitrant material, secondary organics
The composition of organic compounds in marine aerosols and the relative contributions of primary and secondary organic compounds remain uncertain. We report results from a novel approach to characterize and quantify organic components of the marine aerosol. Size-segregated discrete aerosol filter s...
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ftcdlib:oai:escholarship.org:ark:/13030/qt4hs1r7hb 2023-06-18T03:41:58+02:00 North Atlantic marine organic aerosol characterized by novel offline thermal desorption mass spectrometry approach: polysaccharides, recalcitrant material, secondary organics Lawler, Michael J Lewis, Savannah L Russell, Lynn M Quinn, Patricia K Bates, Timothy S Coffman, Derek J Upchurch, Lucia M Saltzman, Eric S 1 - 28 2020-12-22 https://escholarship.org/uc/item/4hs1r7hb unknown eScholarship, University of California qt4hs1r7hb https://escholarship.org/uc/item/4hs1r7hb CC-BY Atmospheric Chemistry and Physics, vol 2020, iss 24 Climate Action Astronomical and Space Sciences Atmospheric Sciences Meteorology & Atmospheric Sciences article 2020 ftcdlib 2023-06-05T17:58:31Z The composition of organic compounds in marine aerosols and the relative contributions of primary and secondary organic compounds remain uncertain. We report results from a novel approach to characterize and quantify organic components of the marine aerosol. Size-segregated discrete aerosol filter samples were collected at sea in the North Atlantic from both ambient aerosol and artificially generated primary sea spray over four cruises timed to capture the seasonal phytoplankton bloom dynamics. Samples were analyzed by Fourier transform infrared spectroscopy (FTIR), extracted into water, and analyzed by offline thermal desorption chemical ionization mass spectrometry (TDCIMS) and ion chromatography (IC). A positive matrix factorization (PMF) analysis identified several characteristic aerosol components in the TDCIMS mass spectra. Among these is a polysaccharide factor representing about 10 %-30% of the submicron organic aerosol mass. Aerosol polysaccharide V sodium mass ratios were consistently higher in ambient air than in the artificially generated sea spray, and we hypothesize that this results from more rapid wet deposition of sodium-rich aerosol. An unquantified recalcitrant factor of highly thermally stable organics showed significant correlation with FTIR-measured alcohol groups, consistently the main organic functional group associated with sea spray aerosol.We hypothesize that this factor represents recalcitrant dissolved organic matter (DOM) in seawater and that by extension alcohol functional groups identified in marine aerosol may more typically represent recalcitrant DOM rather than biogenic saccharide-like material, contrary to inferences made in previous studies. The recalcitrant factor showed little seasonal variability in its contribution to primary marine aerosol. The relative contribution of polysaccharides was highest in late spring and summer in the smallest particle size fraction characterized (< 180 nm). Article in Journal/Newspaper North Atlantic University of California: eScholarship |
institution |
Open Polar |
collection |
University of California: eScholarship |
op_collection_id |
ftcdlib |
language |
unknown |
topic |
Climate Action Astronomical and Space Sciences Atmospheric Sciences Meteorology & Atmospheric Sciences |
spellingShingle |
Climate Action Astronomical and Space Sciences Atmospheric Sciences Meteorology & Atmospheric Sciences Lawler, Michael J Lewis, Savannah L Russell, Lynn M Quinn, Patricia K Bates, Timothy S Coffman, Derek J Upchurch, Lucia M Saltzman, Eric S North Atlantic marine organic aerosol characterized by novel offline thermal desorption mass spectrometry approach: polysaccharides, recalcitrant material, secondary organics |
topic_facet |
Climate Action Astronomical and Space Sciences Atmospheric Sciences Meteorology & Atmospheric Sciences |
description |
The composition of organic compounds in marine aerosols and the relative contributions of primary and secondary organic compounds remain uncertain. We report results from a novel approach to characterize and quantify organic components of the marine aerosol. Size-segregated discrete aerosol filter samples were collected at sea in the North Atlantic from both ambient aerosol and artificially generated primary sea spray over four cruises timed to capture the seasonal phytoplankton bloom dynamics. Samples were analyzed by Fourier transform infrared spectroscopy (FTIR), extracted into water, and analyzed by offline thermal desorption chemical ionization mass spectrometry (TDCIMS) and ion chromatography (IC). A positive matrix factorization (PMF) analysis identified several characteristic aerosol components in the TDCIMS mass spectra. Among these is a polysaccharide factor representing about 10 %-30% of the submicron organic aerosol mass. Aerosol polysaccharide V sodium mass ratios were consistently higher in ambient air than in the artificially generated sea spray, and we hypothesize that this results from more rapid wet deposition of sodium-rich aerosol. An unquantified recalcitrant factor of highly thermally stable organics showed significant correlation with FTIR-measured alcohol groups, consistently the main organic functional group associated with sea spray aerosol.We hypothesize that this factor represents recalcitrant dissolved organic matter (DOM) in seawater and that by extension alcohol functional groups identified in marine aerosol may more typically represent recalcitrant DOM rather than biogenic saccharide-like material, contrary to inferences made in previous studies. The recalcitrant factor showed little seasonal variability in its contribution to primary marine aerosol. The relative contribution of polysaccharides was highest in late spring and summer in the smallest particle size fraction characterized (< 180 nm). |
format |
Article in Journal/Newspaper |
author |
Lawler, Michael J Lewis, Savannah L Russell, Lynn M Quinn, Patricia K Bates, Timothy S Coffman, Derek J Upchurch, Lucia M Saltzman, Eric S |
author_facet |
Lawler, Michael J Lewis, Savannah L Russell, Lynn M Quinn, Patricia K Bates, Timothy S Coffman, Derek J Upchurch, Lucia M Saltzman, Eric S |
author_sort |
Lawler, Michael J |
title |
North Atlantic marine organic aerosol characterized by novel offline thermal desorption mass spectrometry approach: polysaccharides, recalcitrant material, secondary organics |
title_short |
North Atlantic marine organic aerosol characterized by novel offline thermal desorption mass spectrometry approach: polysaccharides, recalcitrant material, secondary organics |
title_full |
North Atlantic marine organic aerosol characterized by novel offline thermal desorption mass spectrometry approach: polysaccharides, recalcitrant material, secondary organics |
title_fullStr |
North Atlantic marine organic aerosol characterized by novel offline thermal desorption mass spectrometry approach: polysaccharides, recalcitrant material, secondary organics |
title_full_unstemmed |
North Atlantic marine organic aerosol characterized by novel offline thermal desorption mass spectrometry approach: polysaccharides, recalcitrant material, secondary organics |
title_sort |
north atlantic marine organic aerosol characterized by novel offline thermal desorption mass spectrometry approach: polysaccharides, recalcitrant material, secondary organics |
publisher |
eScholarship, University of California |
publishDate |
2020 |
url |
https://escholarship.org/uc/item/4hs1r7hb |
op_coverage |
1 - 28 |
genre |
North Atlantic |
genre_facet |
North Atlantic |
op_source |
Atmospheric Chemistry and Physics, vol 2020, iss 24 |
op_relation |
qt4hs1r7hb https://escholarship.org/uc/item/4hs1r7hb |
op_rights |
CC-BY |
_version_ |
1769007716142940160 |