Formation and growth of fresh atmospheric aerosols

eight years of aerosol size distribution data from SMEAR II, Hyytiälä, Finland

    Research output: Contribution to journalArticleScientificpeer-review

    Abstract

    We analyzed size distributions measured continuously at a boreal forest measurement site at Hyytiala, Finland between 1996 and 2003. From the eight-year data we identified days when new aerosol particle formation was taking place as well as days when no formation was detected, removing days with ambiguous status. The event days were then classified based on whether it was possible to determine formation and growth rates of new particles. These characteristics were then calculated. We found that new particle formation happens frequently in the boreal forest boundary layer, with at least 24% of days containing an event. Events are more probable during spring and autumn than during other times of the year. The average formation rate of particles larger than 3 nm was 0.8 cm(-3) s(-1), with enhanced rates during spring and autumn. The mean growth rate was 3.0 nm h(-1) peaking in summer. The created event database is valuable for future Studies of reasons leading to new particle formation in the atmosphere.
    Original languageEnglish
    JournalBoreal Environment Research
    Volume10
    Issue number5
    Pages (from-to)323-336
    Number of pages14
    ISSN1239-6095
    Publication statusPublished - 2005
    MoE publication typeA1 Journal article-refereed

    Fields of Science

    • ilmalaatu
    • metsät
    • ilmakehä
    • hiukkaset

    Cite this

    @article{305545cc503142959a4699e01f1e03bc,
    title = "Formation and growth of fresh atmospheric aerosols: eight years of aerosol size distribution data from SMEAR II, Hyyti{\"a}l{\"a}, Finland",
    abstract = "We analyzed size distributions measured continuously at a boreal forest measurement site at Hyytiala, Finland between 1996 and 2003. From the eight-year data we identified days when new aerosol particle formation was taking place as well as days when no formation was detected, removing days with ambiguous status. The event days were then classified based on whether it was possible to determine formation and growth rates of new particles. These characteristics were then calculated. We found that new particle formation happens frequently in the boreal forest boundary layer, with at least 24{\%} of days containing an event. Events are more probable during spring and autumn than during other times of the year. The average formation rate of particles larger than 3 nm was 0.8 cm(-3) s(-1), with enhanced rates during spring and autumn. The mean growth rate was 3.0 nm h(-1) peaking in summer. The created event database is valuable for future Studies of reasons leading to new particle formation in the atmosphere.",
    keywords = "ilmalaatu, mets{\"a}t, ilmakeh{\"a}, hiukkaset, ilmalaatu, mets{\"a}t, ilmakeh{\"a}, hiukkaset, ilmalaatu, mets{\"a}t, ilmakeh{\"a}, hiukkaset",
    author = "{Dal Maso}, Miikka and Markku Kulmala and Ilona Riipinen and Robert Wagner and Tareq Hussein and Aalto, {Pasi P} and Lehtinen, {Kari E. J}",
    year = "2005",
    language = "English",
    volume = "10",
    pages = "323--336",
    journal = "Boreal Environment Research",
    issn = "1239-6095",
    publisher = "Finnish Environment Institute",
    number = "5",

    }

    Formation and growth of fresh atmospheric aerosols : eight years of aerosol size distribution data from SMEAR II, Hyytiälä, Finland. / Dal Maso, Miikka; Kulmala, Markku; Riipinen, Ilona; Wagner, Robert; Hussein, Tareq; Aalto, Pasi P; Lehtinen, Kari E. J.

    In: Boreal Environment Research, Vol. 10, No. 5, 2005, p. 323-336.

    Research output: Contribution to journalArticleScientificpeer-review

    TY - JOUR

    T1 - Formation and growth of fresh atmospheric aerosols

    T2 - eight years of aerosol size distribution data from SMEAR II, Hyytiälä, Finland

    AU - Dal Maso, Miikka

    AU - Kulmala, Markku

    AU - Riipinen, Ilona

    AU - Wagner, Robert

    AU - Hussein, Tareq

    AU - Aalto, Pasi P

    AU - Lehtinen, Kari E. J

    PY - 2005

    Y1 - 2005

    N2 - We analyzed size distributions measured continuously at a boreal forest measurement site at Hyytiala, Finland between 1996 and 2003. From the eight-year data we identified days when new aerosol particle formation was taking place as well as days when no formation was detected, removing days with ambiguous status. The event days were then classified based on whether it was possible to determine formation and growth rates of new particles. These characteristics were then calculated. We found that new particle formation happens frequently in the boreal forest boundary layer, with at least 24% of days containing an event. Events are more probable during spring and autumn than during other times of the year. The average formation rate of particles larger than 3 nm was 0.8 cm(-3) s(-1), with enhanced rates during spring and autumn. The mean growth rate was 3.0 nm h(-1) peaking in summer. The created event database is valuable for future Studies of reasons leading to new particle formation in the atmosphere.

    AB - We analyzed size distributions measured continuously at a boreal forest measurement site at Hyytiala, Finland between 1996 and 2003. From the eight-year data we identified days when new aerosol particle formation was taking place as well as days when no formation was detected, removing days with ambiguous status. The event days were then classified based on whether it was possible to determine formation and growth rates of new particles. These characteristics were then calculated. We found that new particle formation happens frequently in the boreal forest boundary layer, with at least 24% of days containing an event. Events are more probable during spring and autumn than during other times of the year. The average formation rate of particles larger than 3 nm was 0.8 cm(-3) s(-1), with enhanced rates during spring and autumn. The mean growth rate was 3.0 nm h(-1) peaking in summer. The created event database is valuable for future Studies of reasons leading to new particle formation in the atmosphere.

    KW - ilmalaatu

    KW - metsät

    KW - ilmakehä

    KW - hiukkaset

    KW - ilmalaatu

    KW - metsät

    KW - ilmakehä

    KW - hiukkaset

    KW - ilmalaatu

    KW - metsät

    KW - ilmakehä

    KW - hiukkaset

    M3 - Article

    VL - 10

    SP - 323

    EP - 336

    JO - Boreal Environment Research

    JF - Boreal Environment Research

    SN - 1239-6095

    IS - 5

    ER -