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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ftmaineuniv:oai:digitalcommons.library.umaine.edu:sms_facpub-1222 2023-05-15T17:31:37+02:00 Factors driving the seasonal and hourly variability of sea-spray aerosol number in the North Atlantic Saliba, Georges Chen, Chia Li Lewis, Savannah Russell, Lynn M. Rivellini, Laura Helena Lee, Alex K.Y. Quinn, Patricia K. Bates, Timothy S. Haëntjens, Nils Boss, Emmanuel S. Karp-Boss, Lee Baetge, Nicholas Carlson, Craig A. Behrenfeld, Michael J. 2019-10-08T07:00:00Z application/pdf https://digitalcommons.library.umaine.edu/sms_facpub/223 https://digitalcommons.library.umaine.edu/cgi/viewcontent.cgi?article=1222&context=sms_facpub unknown DigitalCommons@UMaine https://digitalcommons.library.umaine.edu/sms_facpub/223 https://digitalcommons.library.umaine.edu/cgi/viewcontent.cgi?article=1222&context=sms_facpub This Item is protected by copyright and/or related rights. You are free to use this item in any way that is permitted by copyright and related rights legislation that applies to your use. Rights assessment remains the responsibility of the researcher. In addition, no permission is required from the rights-holder(s) for non-commercial uses. Marine Sciences Faculty Scholarship NAAMES Phytoplankton bloom Radiative impacts Sea spray aerosol Oceanography and Atmospheric Sciences and Meteorology text 2019 ftmaineuniv 2023-03-12T18:50:51Z 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. Text North Atlantic The University of Maine: DigitalCommons@UMaine |
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Open Polar |
collection |
The University of Maine: DigitalCommons@UMaine |
op_collection_id |
ftmaineuniv |
language |
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topic |
NAAMES Phytoplankton bloom Radiative impacts Sea spray aerosol Oceanography and Atmospheric Sciences and Meteorology |
spellingShingle |
NAAMES Phytoplankton bloom Radiative impacts Sea spray aerosol Oceanography and Atmospheric Sciences and Meteorology Saliba, Georges Chen, Chia Li Lewis, Savannah Russell, Lynn M. Rivellini, Laura Helena Lee, Alex K.Y. Quinn, Patricia K. Bates, Timothy S. Haëntjens, Nils Boss, Emmanuel S. Karp-Boss, Lee Baetge, Nicholas Carlson, Craig A. Behrenfeld, Michael J. 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 Oceanography and Atmospheric Sciences and Meteorology |
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 |
Text |
author |
Saliba, Georges Chen, Chia Li Lewis, Savannah Russell, Lynn M. Rivellini, Laura Helena Lee, Alex K.Y. Quinn, Patricia K. Bates, Timothy S. Haëntjens, Nils Boss, Emmanuel S. Karp-Boss, Lee Baetge, Nicholas Carlson, Craig A. Behrenfeld, Michael J. |
author_facet |
Saliba, Georges Chen, Chia Li Lewis, Savannah Russell, Lynn M. Rivellini, Laura Helena Lee, Alex K.Y. Quinn, Patricia K. Bates, Timothy S. Haëntjens, Nils Boss, Emmanuel S. Karp-Boss, Lee Baetge, Nicholas Carlson, Craig A. Behrenfeld, Michael J. |
author_sort |
Saliba, Georges |
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 |
DigitalCommons@UMaine |
publishDate |
2019 |
url |
https://digitalcommons.library.umaine.edu/sms_facpub/223 https://digitalcommons.library.umaine.edu/cgi/viewcontent.cgi?article=1222&context=sms_facpub |
genre |
North Atlantic |
genre_facet |
North Atlantic |
op_source |
Marine Sciences Faculty Scholarship |
op_relation |
https://digitalcommons.library.umaine.edu/sms_facpub/223 https://digitalcommons.library.umaine.edu/cgi/viewcontent.cgi?article=1222&context=sms_facpub |
op_rights |
This Item is protected by copyright and/or related rights. You are free to use this item in any way that is permitted by copyright and related rights legislation that applies to your use. Rights assessment remains the responsibility of the researcher. In addition, no permission is required from the rights-holder(s) for non-commercial uses. |
_version_ |
1766129276385492992 |