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dc.contributor.authorPereira Freitas, Gabriel
dc.contributor.authorKopec, Ben
dc.contributor.authorAdachi, Kouji
dc.contributor.authorKrejci, Radovan
dc.contributor.authorHeslin-Rees, Dominic
dc.contributor.authorYttri, Karl Espen
dc.contributor.authorHubbard, Alun Lloyd
dc.contributor.authorWelker, Jeffrey M.
dc.contributor.authorZieger, Paul
dc.date.accessioned2024-05-23T08:25:08Z
dc.date.available2024-05-23T08:25:08Z
dc.date.issued2024-05-13
dc.description.abstractMixed-phase clouds (MPCs) are key players in the Arctic climate system due to their role in modulating solar and terrestrial radiation. Such radiative interactions rely, among other factors, on the ice content of MPCs, which is regulated by the availability of ice-nucleating particles (INPs). While it appears that INPs are associated with the presence of primary biological aerosol particles (PBAPs) in the Arctic, the nuances of the processes and patterns of INPs and their association with clouds and moisture sources have not been resolved. Here, we investigated for a full year the abundance of and variability in fluorescent PBAPs (fPBAPs) within cloud residuals, directly sampled by a multiparameter bioaerosol spectrometer coupled to a ground-based counterflow virtual impactor inlet at the Zeppelin Observatory (475 m a.s.l.) in Ny-Ålesund, Svalbard. fPBAP concentrations (10−3–10−2 L−1) and contributions to coarse-mode cloud residuals (0.1 to 1 in every 103 particles) were found to be close to those expected for high-temperature INPs. Transmission electron microscopy confirmed the presence of PBAPs, most likely bacteria, within one cloud residual sample. Seasonally, our results reveal an elevated presence of fPBAPs within cloud residuals in summer. Parallel water vapor isotope measurements point towards a link between summer clouds and regionally sourced air masses. Low-level MPCs were predominantly observed at the beginning and end of summer, and one explanation for their presence is the existence of high-temperature INPs. In this study, we present direct observational evidence that fPBAPs may play an important role in determining the phase of low-level Arctic clouds. These findings have potential implications for the future description of sources of ice nuclei given ongoing changes in the hydrological and biogeochemical cycles that will influence the PBAP flux in and towards the Arctic.en_US
dc.identifier.citationPereira Freitas, Kopec BG, Adachi K, Krejci R, Heslin-Rees D, Yttri KE, Hubbard AL, Welker JM, Zieger P. Contribution of fluorescent primary biological aerosol particles to low-level Arctic cloud residuals. Atmospheric Chemistry and Physics (ACP). 2024;24:5479-5494en_US
dc.identifier.cristinIDFRIDAID 2269558
dc.identifier.doi10.5194/acp-24-5479-2024
dc.identifier.issn1680-7316
dc.identifier.issn1680-7324
dc.identifier.urihttps://hdl.handle.net/10037/33599
dc.language.isoengen_US
dc.publisherCopernicus Publicationsen_US
dc.relation.journalAtmospheric Chemistry and Physics (ACP)
dc.relation.projectIDinfo:eu-repo/grantAgreement/EC/H2020/821205/EU/Constrained aerosol forcing for improved climate projections/FORCeS/en_US
dc.relation.projectIDinfo:eu-repo/grantAgreement/EC/H2020/101003826/EU/Antarctica’s meteorites are disappearing into the ice, say scientists/CRiceS/en_US
dc.rights.accessRightsopenAccessen_US
dc.rights.holderCopyright 2024 The Author(s)en_US
dc.rights.urihttps://creativecommons.org/licenses/by/4.0en_US
dc.rightsAttribution 4.0 International (CC BY 4.0)en_US
dc.titleContribution of fluorescent primary biological aerosol particles to low-level Arctic cloud residualsen_US
dc.type.versionpublishedVersionen_US
dc.typeJournal articleen_US
dc.typeTidsskriftartikkelen_US
dc.typePeer revieweden_US


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Attribution 4.0 International (CC BY 4.0)
Med mindre det står noe annet, er denne innførselens lisens beskrevet som Attribution 4.0 International (CC BY 4.0)