Factors driving the seasonal and hourly variability of sea-spray aerosol number in the North Atlantic.
Four North Atlantic Aerosol and Marine Ecosystems Study (NAAMES) field campaigns from winter 2015 through spring 2018 sampled an extensive set of oceanographic and atmospheric parameters during the annual phytoplankton bloom cycle. This unique dataset provides four seasons of open-ocean observations...
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ftcdlib:oai:escholarship.org:ark:/13030/qt4r13s9b0 2023-11-12T04:22:07+01:00 Factors driving the seasonal and hourly variability of sea-spray aerosol number in the North Atlantic. Rivellini, Laura-Helena Lee, Alex Quinn, Patricia Bates, Timothy Haëntjens, Nils Boss, Emmanuel Karp-Boss, Lee Baetge, Nicholas Carlson, Craig Behrenfeld, Michael Saliba, Georges Chen, Chia-Li Lewis, Savannah Russell, Lynn 2019-10-08 application/pdf https://escholarship.org/uc/item/4r13s9b0 unknown eScholarship, University of California qt4r13s9b0 https://escholarship.org/uc/item/4r13s9b0 public Proceedings of the National Academy of Sciences of USA, vol 116, iss 41 NAAMES phytoplankton bloom radiative impacts sea spray aerosol article 2019 ftcdlib 2023-10-16T18:04:26Z Four North Atlantic Aerosol and Marine Ecosystems Study (NAAMES) field campaigns from winter 2015 through spring 2018 sampled an extensive set of oceanographic and atmospheric parameters during the annual phytoplankton bloom cycle. This unique dataset provides four seasons of open-ocean observations of wind speed, sea surface temperature (SST), seawater particle attenuation at 660 nm (cp,660, a measure of ocean particulate organic carbon), bacterial production rates, and sea-spray aerosol size distributions and number concentrations (NSSA). The NAAMES measurements show moderate to strong correlations (0.56 < R < 0.70) between NSSA and local wind speeds in the marine boundary layer on hourly timescales, but this relationship weakens in the campaign averages that represent each season, in part because of the reduction in range of wind speed by multiday averaging. NSSA correlates weakly with seawater cp,660 (R = 0.36, P << 0.01), but the correlation with cp,660, is improved (R = 0.51, P < 0.05) for periods of low wind speeds. In addition, NAAMES measurements provide observational dependence of SSA mode diameter (dm) on SST, with dm increasing to larger sizes at higher SST (R = 0.60, P << 0.01) on hourly timescales. These results imply that climate models using bimodal SSA parameterizations to wind speed rather than a single SSA mode that varies with SST may overestimate SSA number concentrations (hence cloud condensation nuclei) by a factor of 4 to 7 and may underestimate SSA scattering (hence direct radiative effects) by a factor of 2 to 5, in addition to overpredicting variability in SSA scattering from wind speed by a factor of 5. Article in Journal/Newspaper North Atlantic University of California: eScholarship |
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Open Polar |
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University of California: eScholarship |
op_collection_id |
ftcdlib |
language |
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topic |
NAAMES phytoplankton bloom radiative impacts sea spray aerosol |
spellingShingle |
NAAMES phytoplankton bloom radiative impacts sea spray aerosol Rivellini, Laura-Helena Lee, Alex Quinn, Patricia Bates, Timothy Haëntjens, Nils Boss, Emmanuel Karp-Boss, Lee Baetge, Nicholas Carlson, Craig Behrenfeld, Michael Saliba, Georges Chen, Chia-Li Lewis, Savannah Russell, Lynn Factors driving the seasonal and hourly variability of sea-spray aerosol number in the North Atlantic. |
topic_facet |
NAAMES phytoplankton bloom radiative impacts sea spray aerosol |
description |
Four North Atlantic Aerosol and Marine Ecosystems Study (NAAMES) field campaigns from winter 2015 through spring 2018 sampled an extensive set of oceanographic and atmospheric parameters during the annual phytoplankton bloom cycle. This unique dataset provides four seasons of open-ocean observations of wind speed, sea surface temperature (SST), seawater particle attenuation at 660 nm (cp,660, a measure of ocean particulate organic carbon), bacterial production rates, and sea-spray aerosol size distributions and number concentrations (NSSA). The NAAMES measurements show moderate to strong correlations (0.56 < R < 0.70) between NSSA and local wind speeds in the marine boundary layer on hourly timescales, but this relationship weakens in the campaign averages that represent each season, in part because of the reduction in range of wind speed by multiday averaging. NSSA correlates weakly with seawater cp,660 (R = 0.36, P << 0.01), but the correlation with cp,660, is improved (R = 0.51, P < 0.05) for periods of low wind speeds. In addition, NAAMES measurements provide observational dependence of SSA mode diameter (dm) on SST, with dm increasing to larger sizes at higher SST (R = 0.60, P << 0.01) on hourly timescales. These results imply that climate models using bimodal SSA parameterizations to wind speed rather than a single SSA mode that varies with SST may overestimate SSA number concentrations (hence cloud condensation nuclei) by a factor of 4 to 7 and may underestimate SSA scattering (hence direct radiative effects) by a factor of 2 to 5, in addition to overpredicting variability in SSA scattering from wind speed by a factor of 5. |
format |
Article in Journal/Newspaper |
author |
Rivellini, Laura-Helena Lee, Alex Quinn, Patricia Bates, Timothy Haëntjens, Nils Boss, Emmanuel Karp-Boss, Lee Baetge, Nicholas Carlson, Craig Behrenfeld, Michael Saliba, Georges Chen, Chia-Li Lewis, Savannah Russell, Lynn |
author_facet |
Rivellini, Laura-Helena Lee, Alex Quinn, Patricia Bates, Timothy Haëntjens, Nils Boss, Emmanuel Karp-Boss, Lee Baetge, Nicholas Carlson, Craig Behrenfeld, Michael Saliba, Georges Chen, Chia-Li Lewis, Savannah Russell, Lynn |
author_sort |
Rivellini, Laura-Helena |
title |
Factors driving the seasonal and hourly variability of sea-spray aerosol number in the North Atlantic. |
title_short |
Factors driving the seasonal and hourly variability of sea-spray aerosol number in the North Atlantic. |
title_full |
Factors driving the seasonal and hourly variability of sea-spray aerosol number in the North Atlantic. |
title_fullStr |
Factors driving the seasonal and hourly variability of sea-spray aerosol number in the North Atlantic. |
title_full_unstemmed |
Factors driving the seasonal and hourly variability of sea-spray aerosol number in the North Atlantic. |
title_sort |
factors driving the seasonal and hourly variability of sea-spray aerosol number in the north atlantic. |
publisher |
eScholarship, University of California |
publishDate |
2019 |
url |
https://escholarship.org/uc/item/4r13s9b0 |
genre |
North Atlantic |
genre_facet |
North Atlantic |
op_source |
Proceedings of the National Academy of Sciences of USA, vol 116, iss 41 |
op_relation |
qt4r13s9b0 https://escholarship.org/uc/item/4r13s9b0 |
op_rights |
public |
_version_ |
1782337257784475648 |