The urban measurement station SMEAR III: continuous monitoring of air pollution and surface-atmosphere interactions in Helsinki, Finland

Leena Järvi; Hanna Hannuniemi; Tareq Hussein; Heikki Junninen; Pasi P Aalto; Risto Hillamo; Timo Mäkelä; Petri Keronen; Erkki Siivola; Timo Vesala; Markku Kulmala

The urban measurement station SMEAR III: continuous monitoring of air pollution and surface-atmosphere interactions in Helsinki, Finland

Leena Järvi, Hanna Hannuniemi, Tareq Hussein, Heikki Junninen, Pasi P Aalto, Risto Hillamo, Timo Mäkelä, Petri Keronen, Erkki Siivola, Timo Vesala, Markku Kulmala

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Abstract

We present results from the air pollution and turbulent exchange measurements made at the urban measurement station SMEAR III in Helsinki, Finland. First measurements at the station started in August 2004 and since then more measurements have gradually been added. We analyze data until June 2007. Temporal variations and dependencies between the size-fractionated particle number concentrations (both fine and coarse particle concentrations), gas concentrations (O-3, NOx, CO and SO2), turbulent fluxes of momentum, sensible and latent heat and CO2, and meteorological variables were studied. Most of the air pollutants and turbulent fluxes showed distinct annual and diurnal variation closely related to the local combustion sources (especially traffic) and the amount of available solar radiation. Ultrafine particles showed the most explicit dependence on traffic and traffic-related pollutants, while larger particles were more affected by the meteorological conditions. The surface fluxes were strongly affected by the specific conditions in urban environment.

Original language	English
Journal	Boreal Environment Research
Volume	14 (2009) Suppl. A
Pages (from-to)	86-109
Number of pages	24
ISSN	1239-6095
Publication status	Published - 2009
MoE publication type	A1 Journal article-refereed

Cite this

@article{263640a932bd42c3b30c61419199d0d2,

title = "The urban measurement station SMEAR III: continuous monitoring of air pollution and surface-atmosphere interactions in Helsinki, Finland",

abstract = "We present results from the air pollution and turbulent exchange measurements made at the urban measurement station SMEAR III in Helsinki, Finland. First measurements at the station started in August 2004 and since then more measurements have gradually been added. We analyze data until June 2007. Temporal variations and dependencies between the size-fractionated particle number concentrations (both fine and coarse particle concentrations), gas concentrations (O-3, NOx, CO and SO2), turbulent fluxes of momentum, sensible and latent heat and CO2, and meteorological variables were studied. Most of the air pollutants and turbulent fluxes showed distinct annual and diurnal variation closely related to the local combustion sources (especially traffic) and the amount of available solar radiation. Ultrafine particles showed the most explicit dependence on traffic and traffic-related pollutants, while larger particles were more affected by the meteorological conditions. The surface fluxes were strongly affected by the specific conditions in urban environment.",

author = "Leena J{\"a}rvi and Hanna Hannuniemi and Tareq Hussein and Heikki Junninen and Aalto, {Pasi P} and Risto Hillamo and Timo M{\"a}kel{\"a} and Petri Keronen and Erkki Siivola and Timo Vesala and Markku Kulmala",

year = "2009",

language = "English",

volume = "14 (2009) Suppl. A",

pages = "86--109",

journal = "Boreal Environment Research",

issn = "1239-6095",

publisher = "Finnish Environment Institute",

}

TY - JOUR

T1 - The urban measurement station SMEAR III

T2 - continuous monitoring of air pollution and surface-atmosphere interactions in Helsinki, Finland

AU - Järvi, Leena

AU - Hannuniemi, Hanna

AU - Hussein, Tareq

AU - Junninen, Heikki

AU - Aalto, Pasi P

AU - Hillamo, Risto

AU - Mäkelä, Timo

AU - Keronen, Petri

AU - Siivola, Erkki

AU - Vesala, Timo

AU - Kulmala, Markku

PY - 2009

Y1 - 2009

N2 - We present results from the air pollution and turbulent exchange measurements made at the urban measurement station SMEAR III in Helsinki, Finland. First measurements at the station started in August 2004 and since then more measurements have gradually been added. We analyze data until June 2007. Temporal variations and dependencies between the size-fractionated particle number concentrations (both fine and coarse particle concentrations), gas concentrations (O-3, NOx, CO and SO2), turbulent fluxes of momentum, sensible and latent heat and CO2, and meteorological variables were studied. Most of the air pollutants and turbulent fluxes showed distinct annual and diurnal variation closely related to the local combustion sources (especially traffic) and the amount of available solar radiation. Ultrafine particles showed the most explicit dependence on traffic and traffic-related pollutants, while larger particles were more affected by the meteorological conditions. The surface fluxes were strongly affected by the specific conditions in urban environment.

AB - We present results from the air pollution and turbulent exchange measurements made at the urban measurement station SMEAR III in Helsinki, Finland. First measurements at the station started in August 2004 and since then more measurements have gradually been added. We analyze data until June 2007. Temporal variations and dependencies between the size-fractionated particle number concentrations (both fine and coarse particle concentrations), gas concentrations (O-3, NOx, CO and SO2), turbulent fluxes of momentum, sensible and latent heat and CO2, and meteorological variables were studied. Most of the air pollutants and turbulent fluxes showed distinct annual and diurnal variation closely related to the local combustion sources (especially traffic) and the amount of available solar radiation. Ultrafine particles showed the most explicit dependence on traffic and traffic-related pollutants, while larger particles were more affected by the meteorological conditions. The surface fluxes were strongly affected by the specific conditions in urban environment.

M3 - Article

VL - 14 (2009) Suppl. A

SP - 86

EP - 109

JO - Boreal Environment Research

JF - Boreal Environment Research

SN - 1239-6095

ER -