Factors controlling marine aerosol size distributions and their climate effects over the northwest Atlantic Ocean region
Aerosols over Earth's remote and spatially extensive ocean surfaces have important influences on planetary climate. However, these aerosols and their effects remain poorly understood, in part due to the remoteness and limited observations over these regions. In this study, we seek to understand...
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Online Access: | http://www.osti.gov/servlets/purl/1769283 https://www.osti.gov/biblio/1769283 https://doi.org/10.5194/acp-21-1889-2021 |
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ftosti:oai:osti.gov:1769283 2023-07-30T04:05:40+02:00 Factors controlling marine aerosol size distributions and their climate effects over the northwest Atlantic Ocean region Croft, Betty Martin, Randall V. Moore, Richard H. Ziemba, Luke D. Crosbie, Ewan C. Liu, Hongyu Russell, Lynn M. Saliba, Georges Wisthaler, Armin Müller, Markus Schiller, Arne Galí, Martí Chang, Rachel Y.-W. McDuffie, Erin E. Bilsback, Kelsey R. Pierce, Jeffrey R. 2023-02-23 application/pdf http://www.osti.gov/servlets/purl/1769283 https://www.osti.gov/biblio/1769283 https://doi.org/10.5194/acp-21-1889-2021 unknown http://www.osti.gov/servlets/purl/1769283 https://www.osti.gov/biblio/1769283 https://doi.org/10.5194/acp-21-1889-2021 doi:10.5194/acp-21-1889-2021 54 ENVIRONMENTAL SCIENCES 2023 ftosti https://doi.org/10.5194/acp-21-1889-2021 2023-07-11T10:01:42Z Aerosols over Earth's remote and spatially extensive ocean surfaces have important influences on planetary climate. However, these aerosols and their effects remain poorly understood, in part due to the remoteness and limited observations over these regions. In this study, we seek to understand factors that shape marine aerosol size distributions and composition in the northwest Atlantic Ocean region. We use the GEOS-Chem model with the TwO-Moment Aerosol Sectional (TOMAS) microphysics algorithm model to interpret measurements collected from ship and aircraft during the four seasonal campaigns of the North Atlantic Aerosols and Marine Ecosystems Study (NAAMES) conducted between 2015 and 2018. Observations from the NAAMES campaigns show enhancements in the campaign-median number of aerosols with diameters larger than 3 nm in the lower troposphere (below 6 km), most pronounced during the phytoplankton bloom maxima (May/June) below 2 km in the free troposphere. Our simulations, combined with NAAMES ship and aircraft measurements, suggest several key factors that contribute to aerosol number and size in the northwest Atlantic lower troposphere, with significant regional-mean (40–60°N and 20–50°W) cloud-albedo aerosol indirect effect (AIE) and direct radiative effect (DRE) processes during the phytoplankton bloom. These key factors and their associated simulated radiative effects in the region include the following: (1) particle formation near and above the marine boundary layer (MBL) top (AIE: -3.37 W m-2, DRE: -0.62 W m-2); (2) particle growth due to marine secondary organic aerosol (MSOA) as the nascent particles subside into the MBL, enabling them to become cloud-condensation-nuclei-sized particles (AIE: -2.27 W m-2, DRE: -0.10 W m-2); (3) particle formation and growth due to the products of dimethyl sulfide, above and within the MBL (-1.29 W m-2, DRE: -0.06 W m-2); (4) ship emissions (AIE: -0.62 W m-2, DRE: -0.05 W m-2); and (5) primary sea spray emissions (AIE: +0.04 W m-2, DRE: -0.79 W m-2). Our results ... Other/Unknown Material North Atlantic Northwest Atlantic SciTec Connect (Office of Scientific and Technical Information - OSTI, U.S. Department of Energy) Atmospheric Chemistry and Physics 21 3 1889 1916 |
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SciTec Connect (Office of Scientific and Technical Information - OSTI, U.S. Department of Energy) |
op_collection_id |
ftosti |
language |
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54 ENVIRONMENTAL SCIENCES |
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54 ENVIRONMENTAL SCIENCES Croft, Betty Martin, Randall V. Moore, Richard H. Ziemba, Luke D. Crosbie, Ewan C. Liu, Hongyu Russell, Lynn M. Saliba, Georges Wisthaler, Armin Müller, Markus Schiller, Arne Galí, Martí Chang, Rachel Y.-W. McDuffie, Erin E. Bilsback, Kelsey R. Pierce, Jeffrey R. Factors controlling marine aerosol size distributions and their climate effects over the northwest Atlantic Ocean region |
topic_facet |
54 ENVIRONMENTAL SCIENCES |
description |
Aerosols over Earth's remote and spatially extensive ocean surfaces have important influences on planetary climate. However, these aerosols and their effects remain poorly understood, in part due to the remoteness and limited observations over these regions. In this study, we seek to understand factors that shape marine aerosol size distributions and composition in the northwest Atlantic Ocean region. We use the GEOS-Chem model with the TwO-Moment Aerosol Sectional (TOMAS) microphysics algorithm model to interpret measurements collected from ship and aircraft during the four seasonal campaigns of the North Atlantic Aerosols and Marine Ecosystems Study (NAAMES) conducted between 2015 and 2018. Observations from the NAAMES campaigns show enhancements in the campaign-median number of aerosols with diameters larger than 3 nm in the lower troposphere (below 6 km), most pronounced during the phytoplankton bloom maxima (May/June) below 2 km in the free troposphere. Our simulations, combined with NAAMES ship and aircraft measurements, suggest several key factors that contribute to aerosol number and size in the northwest Atlantic lower troposphere, with significant regional-mean (40–60°N and 20–50°W) cloud-albedo aerosol indirect effect (AIE) and direct radiative effect (DRE) processes during the phytoplankton bloom. These key factors and their associated simulated radiative effects in the region include the following: (1) particle formation near and above the marine boundary layer (MBL) top (AIE: -3.37 W m-2, DRE: -0.62 W m-2); (2) particle growth due to marine secondary organic aerosol (MSOA) as the nascent particles subside into the MBL, enabling them to become cloud-condensation-nuclei-sized particles (AIE: -2.27 W m-2, DRE: -0.10 W m-2); (3) particle formation and growth due to the products of dimethyl sulfide, above and within the MBL (-1.29 W m-2, DRE: -0.06 W m-2); (4) ship emissions (AIE: -0.62 W m-2, DRE: -0.05 W m-2); and (5) primary sea spray emissions (AIE: +0.04 W m-2, DRE: -0.79 W m-2). Our results ... |
author |
Croft, Betty Martin, Randall V. Moore, Richard H. Ziemba, Luke D. Crosbie, Ewan C. Liu, Hongyu Russell, Lynn M. Saliba, Georges Wisthaler, Armin Müller, Markus Schiller, Arne Galí, Martí Chang, Rachel Y.-W. McDuffie, Erin E. Bilsback, Kelsey R. Pierce, Jeffrey R. |
author_facet |
Croft, Betty Martin, Randall V. Moore, Richard H. Ziemba, Luke D. Crosbie, Ewan C. Liu, Hongyu Russell, Lynn M. Saliba, Georges Wisthaler, Armin Müller, Markus Schiller, Arne Galí, Martí Chang, Rachel Y.-W. McDuffie, Erin E. Bilsback, Kelsey R. Pierce, Jeffrey R. |
author_sort |
Croft, Betty |
title |
Factors controlling marine aerosol size distributions and their climate effects over the northwest Atlantic Ocean region |
title_short |
Factors controlling marine aerosol size distributions and their climate effects over the northwest Atlantic Ocean region |
title_full |
Factors controlling marine aerosol size distributions and their climate effects over the northwest Atlantic Ocean region |
title_fullStr |
Factors controlling marine aerosol size distributions and their climate effects over the northwest Atlantic Ocean region |
title_full_unstemmed |
Factors controlling marine aerosol size distributions and their climate effects over the northwest Atlantic Ocean region |
title_sort |
factors controlling marine aerosol size distributions and their climate effects over the northwest atlantic ocean region |
publishDate |
2023 |
url |
http://www.osti.gov/servlets/purl/1769283 https://www.osti.gov/biblio/1769283 https://doi.org/10.5194/acp-21-1889-2021 |
genre |
North Atlantic Northwest Atlantic |
genre_facet |
North Atlantic Northwest Atlantic |
op_relation |
http://www.osti.gov/servlets/purl/1769283 https://www.osti.gov/biblio/1769283 https://doi.org/10.5194/acp-21-1889-2021 doi:10.5194/acp-21-1889-2021 |
op_doi |
https://doi.org/10.5194/acp-21-1889-2021 |
container_title |
Atmospheric Chemistry and Physics |
container_volume |
21 |
container_issue |
3 |
container_start_page |
1889 |
op_container_end_page |
1916 |
_version_ |
1772817748471054336 |