TY - JOUR
T1 - Mediterranean nascent sea spray organic aerosol and relationships with seawater biogeochemistry
AU - Freney, Evelyn
AU - Sellegri, Karine
AU - Nicosia, Alessia
AU - Williams, Leah R.
AU - Rinaldi, Matteo
AU - Trueblood, Jonathan T.
AU - Prévôt, André S.H.
AU - Thyssen, Melilotus
AU - Grégori, Gérald
AU - Haëntjens, Nils
AU - DInasquet, Julie
AU - Obernosterer, Ingrid
AU - Van Wambeke, France
AU - Engel, Anja
AU - Zäncker, Birthe
AU - Desboeufs, Karine
AU - Asmi, Eija
AU - Timonen, Hilkka
AU - Guieu, Cécile
N1 - Funding Information:
Acknowledgements. The underway optical instrumentation was provided by Emmanuel Boss’s group funded by NASA Ocean Biology and Biogeochemistry. We thank Oliver Grosso, Dominique Lefèvre, and Thibault Wagener for their contribution to the continuous surface pumping system and the follow-up of CytoSense during the cruise. More information on the PEACETIME cruise can be found at https://doi.org/10.17600/17000300. Sea2Cloud was endorsed by SOLAS. We thank the captain and the crew of R/V Pourquoi Pas? for their professionalism and their work at sea.
Funding Information:
Financial support. This study is a contribution to the PEACETIME project (http://peacetime-project.org, last access: 5 May 2021), a joint initiative of the MERMEX and ChArMEx components supported by CNRS-INSU, IFREMER, CEA, and Météo-France as part of the MISTRALS program coordinated by CNRS-INSU. PEACETIME was endorsed as a process study by GEOTRACES and is also a contribution to the IMBER and SOLAS international programs. This work has also received funding from the European Research Council (ERC) under the European Union’s Horizon 2020 research and innovation program (Sea2Cloud grant agreement no. 771369).
Publisher Copyright:
© Copyright:
PY - 2021/7/14
Y1 - 2021/7/14
N2 - The organic mass fraction from sea spray aerosol (SSA) is currently a subject of intense research. The majority of this research is dedicated to measurements in ambient air. However a number of studies have recently started to focus on nascent sea spray aerosol. This work presents measurements collected during a 5-week cruise in May and June 2017 in the central and western Mediterranean Sea, an oligotrophic marine region with low phytoplankton biomass. Surface seawater was continuously pumped into a bubble-bursting apparatus to generate nascent sea spray aerosol. Size distributions were measured with a differential mobility particle sizer (DMPS). Chemical characterization of the submicron aerosol was performed with a time-of-flight aerosol chemical speciation monitor (ToF-ACSM) operating with 10min time resolution and with filter-based chemical analysis on a daily basis. Using positive matrix factorization analysis, the ToF-ACSM non-refractory organic matter (OMNR) was separated into four different organic aerosol types, identified as primary OA (POANR), oxidized OA (OOANR), methanesulfonic acid type OA (MSA-OANR), and mixed OA (MOANR). In parallel, surface seawater biogeochemical properties were monitored providing information on phytoplankton cell abundance and seawater particulate organic carbon (1h time resolution) and seawater surface microlayer (SML) dissolved organic carbon (DOC) (on a daily basis). Statistically robust correlations (for n>500) were found between MOANR and nanophytoplankton cell abundance, as well as between POANR, OOANR, and particulate organic carbon (POC). Parameterizations of the contributions of different types of organics to the submicron nascent sea spray aerosol are proposed as a function of the seawater biogeochemical properties for use in models.
AB - The organic mass fraction from sea spray aerosol (SSA) is currently a subject of intense research. The majority of this research is dedicated to measurements in ambient air. However a number of studies have recently started to focus on nascent sea spray aerosol. This work presents measurements collected during a 5-week cruise in May and June 2017 in the central and western Mediterranean Sea, an oligotrophic marine region with low phytoplankton biomass. Surface seawater was continuously pumped into a bubble-bursting apparatus to generate nascent sea spray aerosol. Size distributions were measured with a differential mobility particle sizer (DMPS). Chemical characterization of the submicron aerosol was performed with a time-of-flight aerosol chemical speciation monitor (ToF-ACSM) operating with 10min time resolution and with filter-based chemical analysis on a daily basis. Using positive matrix factorization analysis, the ToF-ACSM non-refractory organic matter (OMNR) was separated into four different organic aerosol types, identified as primary OA (POANR), oxidized OA (OOANR), methanesulfonic acid type OA (MSA-OANR), and mixed OA (MOANR). In parallel, surface seawater biogeochemical properties were monitored providing information on phytoplankton cell abundance and seawater particulate organic carbon (1h time resolution) and seawater surface microlayer (SML) dissolved organic carbon (DOC) (on a daily basis). Statistically robust correlations (for n>500) were found between MOANR and nanophytoplankton cell abundance, as well as between POANR, OOANR, and particulate organic carbon (POC). Parameterizations of the contributions of different types of organics to the submicron nascent sea spray aerosol are proposed as a function of the seawater biogeochemical properties for use in models.
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UR - http://www.scopus.com/inward/citedby.url?scp=85110511239&partnerID=8YFLogxK
U2 - 10.5194/acp-21-10625-2021
DO - 10.5194/acp-21-10625-2021
M3 - Article
AN - SCOPUS:85110511239
VL - 21
SP - 10625
EP - 10641
JO - Atmospheric Chemistry and Physics
JF - Atmospheric Chemistry and Physics
SN - 1680-7316
IS - 13
ER -