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Sökning: WFRF:(Marbouti Marjan) > An evaluation of ne...

LIBRIS Formathandbok  (Information om MARC21)
FältnamnIndikatorerMetadata
00004479naa a2200505 4500
001oai:DiVA.org:su-205253
003SwePub
008220531s2022 | |||||||||||000 ||eng|
0247 a https://urn.kb.se/resolve?urn=urn:nbn:se:su:diva-2052532 URI
0247 a https://doi.org/10.5194/acp-22-6365-20222 DOI
040 a (SwePub)su
041 a engb eng
042 9 SwePub
072 7a ref2 swepub-contenttype
072 7a art2 swepub-publicationtype
1001 a Thakur, Roseline C.4 aut
2451 0a An evaluation of new particle formation events in Helsinki during a Baltic Sea cyanobacterial summer bloom
264 c 2022-05-17
264 1b Copernicus GmbH,c 2022
338 a print2 rdacarrier
520 a Several studies have investigated new particle formation (NPF) events from various sites ranging from pristine locations, including forest sites, to urban areas. However, there is still a dearth of studies investigating NPF processes and subsequent aerosol growth in coastal yet semi-urban sites, where the tropospheric layer is a concoction of biogenic and anthropogenic gases and particles. The investigation of factors leading to NPF becomes extremely complex due to the highly dynamic meteorological conditions at the coastline especially when combined with both continental and oceanic weather conditions. Herein, we engage in a comprehensive study of particle number size distributions and aerosol-forming precursor vapors at the coastal semi-urban site in Helsinki, Finland. The measurement period, 25 June-18 August 2019, was timed with the recurring cyanobacterial summer bloom in the Baltic Sea region and coastal regions of Finland. Our study recorded several regional/local NPF and aerosol burst events during this period. Although the overall anthropogenic influence on sulfuric acid (SA) concentrations was low during the measurement period, we observed that the regional or local NPF events, characterized by SA concentrations on the order of 10(7) molec. cm(-3), occurred mostly when the air mass traveled over the land areas. Interestingly, when the air mass traveled over the Baltic Sea, an area enriched with algae and cyanobacterial blooms, high iodic acid (IA) concentration coincided with an aerosol burst or a spike event at the measurement site. Further, SA-rich bursts were seen when the air mass traveled over the Gulf of Bothnia, enriched with cyanobacterial blooms. The two most important factors affecting aerosol precursor vapor concentrations, and thus the aerosol formation, were speculated to be (1) the type of phytoplankton species and intensity of bloom present in the coastal regions of Finland and the Baltic Sea and (2) the wind direction. During the events, most of the growth of sub-3 nm particles was probably due to SA, rather than IA or methane sulfonic acid (MSA); however much of the particle growth remained unexplained indicative of the strong role of organics in the growth of particles, especially in the 3-7 nm particle size range. Further studies are needed to explore the role of organics in NPF events and the potential influence of cyanobacterial blooms in coastal locations.
650 7a NATURVETENSKAPx Geovetenskap och miljövetenskap0 (SwePub)1052 hsv//swe
650 7a NATURAL SCIENCESx Earth and Related Environmental Sciences0 (SwePub)1052 hsv//eng
7001 a Dada, Lubna4 aut
7001 a Beck, Lisa J.4 aut
7001 a Quelever, Lauriane L. J.4 aut
7001 a Chan, Tommy4 aut
7001 a Marbouti, Marjan4 aut
7001 a He, Xu-Cheng4 aut
7001 a Xavier, Carlton4 aut
7001 a Sulo, Juha4 aut
7001 a Lampilahti, Janne4 aut
7001 a Lampimäki, Markus4 aut
7001 a Tham, Yee Jun4 aut
7001 a Sarnela, Nina4 aut
7001 a Lehtipalo, Katrianne4 aut
7001 a Norkko, Alfu Stockholms universitet,Stockholms universitets Östersjöcentrum,University of Helsinki, Finland4 aut0 (Swepub:su)alno3757
7001 a Kulmala, Markku4 aut
7001 a Sipilä, Mikko4 aut
7001 a Jokinen, Tuija4 aut
7102 a Stockholms universitetb Stockholms universitets Östersjöcentrum4 org
7730 t Atmospheric Chemistry And Physicsd : Copernicus GmbHg 22:9, s. 6365-6391q 22:9<6365-6391x 1680-7316x 1680-7324
8564 u https://doi.org/10.5194/acp-22-6365-2022y Fulltext
8564 8u https://urn.kb.se/resolve?urn=urn:nbn:se:su:diva-205253
8564 8u https://doi.org/10.5194/acp-22-6365-2022

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