Ejection of Dust From the Ocean as a Potential Source of Marine Ice Nucleating Particles
Oceans are, generally, relatively weak sources of ice nucleating particles (INPs). Thus, dust transported from terrestrial regions can dominate atmospheric INP concentrations even in remote marine regions. Studies of ocean-emitted INPs have focused upon sea spray aerosols containing biogenic species...
Published in: | Journal of Geophysical Research: Atmospheres |
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Online Access: | http://www.osti.gov/servlets/purl/1755647 https://www.osti.gov/biblio/1755647 https://doi.org/10.1029/2020jd033073 |
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ftosti:oai:osti.gov:1755647 2023-07-30T04:07:03+02:00 Ejection of Dust From the Ocean as a Potential Source of Marine Ice Nucleating Particles Cornwell, Gavin C. Sultana, Camille M. Prank, Marje Cochran, Richard E. Hill, Thomas J. Schill, Gregory P. DeMott, Paul J. Mahowald, Natalie Prather, Kimberly A. 2022-12-22 application/pdf http://www.osti.gov/servlets/purl/1755647 https://www.osti.gov/biblio/1755647 https://doi.org/10.1029/2020jd033073 unknown http://www.osti.gov/servlets/purl/1755647 https://www.osti.gov/biblio/1755647 https://doi.org/10.1029/2020jd033073 doi:10.1029/2020jd033073 54 ENVIRONMENTAL SCIENCES 2022 ftosti https://doi.org/10.1029/2020jd033073 2023-07-11T10:00:03Z Oceans are, generally, relatively weak sources of ice nucleating particles (INPs). Thus, dust transported from terrestrial regions can dominate atmospheric INP concentrations even in remote marine regions. Studies of ocean-emitted INPs have focused upon sea spray aerosols containing biogenic species. Even though large concentrations of dust are transported over marine regions, resuspended dust has never been explicitly considered as another possible source of ocean-emitted INPs. Current models assume that deposited dust is not re-emitted from surface waters. Our laboratory studies of aerosol particles produced from coastal seawater and synthetic seawater doped with dust show that dust can indeed be ejected from water during bubble bursting. INP concentration measurements show these ejected dust particles retain ice nucleating activity. Doping synthetic seawater to simulate a strong dust deposition event produced INPs active at temperatures colder than -13 °C and INP concentrations one to two orders of magnitude greater than either lab sea spray or marine boundary layer measurements. The relevance of these laboratory findings is highlighted by single particle composition measurements along the Californian coast where at least 9% of dust particles were mixed with sea salt. Additionally, global modeling studies show that resuspension of dust from the ocean could exert the most impact over the Southern Ocean, where ocean-emitted INPs are thought to dominate atmospheric INP populations. More work characterizing the factors governing the resuspension of dust particles is required to understand the potential impact upon clouds. Other/Unknown Material Southern Ocean SciTec Connect (Office of Scientific and Technical Information - OSTI, U.S. Department of Energy) Southern Ocean Journal of Geophysical Research: Atmospheres 125 24 |
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SciTec Connect (Office of Scientific and Technical Information - OSTI, U.S. Department of Energy) |
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ftosti |
language |
unknown |
topic |
54 ENVIRONMENTAL SCIENCES |
spellingShingle |
54 ENVIRONMENTAL SCIENCES Cornwell, Gavin C. Sultana, Camille M. Prank, Marje Cochran, Richard E. Hill, Thomas J. Schill, Gregory P. DeMott, Paul J. Mahowald, Natalie Prather, Kimberly A. Ejection of Dust From the Ocean as a Potential Source of Marine Ice Nucleating Particles |
topic_facet |
54 ENVIRONMENTAL SCIENCES |
description |
Oceans are, generally, relatively weak sources of ice nucleating particles (INPs). Thus, dust transported from terrestrial regions can dominate atmospheric INP concentrations even in remote marine regions. Studies of ocean-emitted INPs have focused upon sea spray aerosols containing biogenic species. Even though large concentrations of dust are transported over marine regions, resuspended dust has never been explicitly considered as another possible source of ocean-emitted INPs. Current models assume that deposited dust is not re-emitted from surface waters. Our laboratory studies of aerosol particles produced from coastal seawater and synthetic seawater doped with dust show that dust can indeed be ejected from water during bubble bursting. INP concentration measurements show these ejected dust particles retain ice nucleating activity. Doping synthetic seawater to simulate a strong dust deposition event produced INPs active at temperatures colder than -13 °C and INP concentrations one to two orders of magnitude greater than either lab sea spray or marine boundary layer measurements. The relevance of these laboratory findings is highlighted by single particle composition measurements along the Californian coast where at least 9% of dust particles were mixed with sea salt. Additionally, global modeling studies show that resuspension of dust from the ocean could exert the most impact over the Southern Ocean, where ocean-emitted INPs are thought to dominate atmospheric INP populations. More work characterizing the factors governing the resuspension of dust particles is required to understand the potential impact upon clouds. |
author |
Cornwell, Gavin C. Sultana, Camille M. Prank, Marje Cochran, Richard E. Hill, Thomas J. Schill, Gregory P. DeMott, Paul J. Mahowald, Natalie Prather, Kimberly A. |
author_facet |
Cornwell, Gavin C. Sultana, Camille M. Prank, Marje Cochran, Richard E. Hill, Thomas J. Schill, Gregory P. DeMott, Paul J. Mahowald, Natalie Prather, Kimberly A. |
author_sort |
Cornwell, Gavin C. |
title |
Ejection of Dust From the Ocean as a Potential Source of Marine Ice Nucleating Particles |
title_short |
Ejection of Dust From the Ocean as a Potential Source of Marine Ice Nucleating Particles |
title_full |
Ejection of Dust From the Ocean as a Potential Source of Marine Ice Nucleating Particles |
title_fullStr |
Ejection of Dust From the Ocean as a Potential Source of Marine Ice Nucleating Particles |
title_full_unstemmed |
Ejection of Dust From the Ocean as a Potential Source of Marine Ice Nucleating Particles |
title_sort |
ejection of dust from the ocean as a potential source of marine ice nucleating particles |
publishDate |
2022 |
url |
http://www.osti.gov/servlets/purl/1755647 https://www.osti.gov/biblio/1755647 https://doi.org/10.1029/2020jd033073 |
geographic |
Southern Ocean |
geographic_facet |
Southern Ocean |
genre |
Southern Ocean |
genre_facet |
Southern Ocean |
op_relation |
http://www.osti.gov/servlets/purl/1755647 https://www.osti.gov/biblio/1755647 https://doi.org/10.1029/2020jd033073 doi:10.1029/2020jd033073 |
op_doi |
https://doi.org/10.1029/2020jd033073 |
container_title |
Journal of Geophysical Research: Atmospheres |
container_volume |
125 |
container_issue |
24 |
_version_ |
1772820135941242880 |