Výsledky vyhledávání - "S Saarikoski"

Akademický článek

Source apportionment of particle number size distribution at the street canyon and urban background sites

Autor: S. D. Harni, M. Aurela, S. Saarikoski, J. V. Niemi, H. Portin, H. Manninen, V. Leinonen, P. Aalto, P. K. Hopke, T. Petäjä, T. Rönkkö, H. Timonen

Publikováno v: Atmospheric Chemistry and Physics, Vol 24, Pp 12143-12160 (2024)

Particle size is one of the key factors influencing how aerosol particles affect their climate and health effects. Therefore, a better understanding of particle size distributions from various sources is crucial. In urban environments, aerosols are p

Externí odkaz: https://doaj.org/article/740da5d5a275453391cf92dbaebb9640

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Akademický článek

Comparison of size distribution and electrical particle sensor measurement methods for particle lung deposited surface area (LDSAal) in ambient measurements with varying conditions

Autor: T. Lepistö, H. Lintusaari, L. Salo, V. Silvonen, L. M. F. Barreira, J. Hoivala, L. Markkula, J. V. Niemi, J. Ondracek, K. Teinilä, H. E. Manninen, S. Saarikoski, H. Timonen, M. Dal Maso, T. Rönkkö

Publikováno v: Aerosol Research, Vol 2, Pp 271-289 (2024)

It has become evident that additional metrics along the particle mass concentration, together with dense air quality monitoring networks within cities, are needed to understand the most efficient ways to tackle the health burden of particulate pollut

Externí odkaz: https://doaj.org/article/a13137e421334f518082b65a7152ea2e

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Akademický článek

Characterization of volatile organic compounds and submicron organic aerosol in a traffic environment

Autor: S. Saarikoski, H. Hellén, A. P. Praplan, S. Schallhart, P. Clusius, J. V. Niemi, A. Kousa, T. Tykkä, R. Kouznetsov, M. Aurela, L. Salo, T. Rönkkö, L. M. F. Barreira, L. Pirjola, H. Timonen

Publikováno v: Atmospheric Chemistry and Physics, Vol 23, Pp 2963-2982 (2023)

Urban air consists of a complex mixture of gaseous and particulate species from anthropogenic and biogenic sources that are further processed in the atmosphere. This study investigated the characteristics and sources of volatile organic compounds (VO

Externí odkaz: https://doaj.org/article/c7d59f3d19694aea90498123dcea9821

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Akademický článek

Sources of black carbon at residential and traffic environments obtained by two source apportionment methods

Autor: S. Saarikoski, J. V. Niemi, M. Aurela, L. Pirjola, A. Kousa, T. Rönkkö, H. Timonen

Publikováno v: Atmospheric Chemistry and Physics, Vol 21, Pp 14851-14869 (2021)

This study investigated the sources of black carbon (BC) at two contrasting urban environments in Helsinki, Finland: residential area and street canyon. The measurement campaign in the residential area was conducted in winter–spring 2019, whereas i

Externí odkaz: https://doaj.org/article/18906cee9a584bb69316d02fc09a812f

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Akademický článek

In-depth characterization of submicron particulate matter inter-annual variations at a street canyon site in northern Europe

Autor: L. M. F. Barreira, A. Helin, M. Aurela, K. Teinilä, M. Friman, L. Kangas, J. V. Niemi, H. Portin, A. Kousa, L. Pirjola, T. Rönkkö, S. Saarikoski, H. Timonen

Publikováno v: Atmospheric Chemistry and Physics, Vol 21, Pp 6297-6314 (2021)

Atmospheric aerosols play an important role in air pollution. Aerosol particle chemical composition is highly variable depending on the season, hour of the day, day of the week, meteorology, and location of the measurement site. Long measurement peri

Externí odkaz: https://doaj.org/article/8919f19b750c44bb88c2039e59c7654a

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Akademický článek

Effects of marine fuel sulfur restrictions on particle number concentrations and size distributions in ship plumes in the Baltic Sea

Autor: S. D. Seppälä, J. Kuula, A.-P. Hyvärinen, S. Saarikoski, T. Rönkkö, J. Keskinen, J.-P. Jalkanen, H. Timonen

Publikováno v: Atmospheric Chemistry and Physics, Vol 21, Pp 3215-3234 (2021)

Exhaust emissions from shipping are a major contributor to particle concentrations in coastal and marine areas. Previously, the marine fuel sulfur content (FSC) was restricted globally to 4.5 m/m%, but the limit was changed to 3.5 m/m% at the beginni

Externí odkaz: https://doaj.org/article/67813c9a3d7c4b8a9c05c5550d08a3f3

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Akademický článek

Laboratory and field evaluation of the Aerosol Dynamics Inc. concentrator (ADIc) for aerosol mass spectrometry

Autor: S. Saarikoski, L. R. Williams, S. R. Spielman, G. S. Lewis, A. Eiguren-Fernandez, M. Aurela, S. V. Hering, K. Teinilä, P. Croteau, J. T. Jayne, T. Hohaus, D. R. Worsnop, H. Timonen

Publikováno v: Atmospheric Measurement Techniques, Vol 12, Pp 3907-3920 (2019)

An air-to-air ultrafine particle concentrator (Aerosol Dynamics Inc. concentrator; ADIc) has been designed to enhance online chemical characterization of ambient aerosols using aerosol mass spectrometry. The ADIc employs a three-stage, moderated wate

Externí odkaz: https://doaj.org/article/fa7298ab70e347378e120517cb4bc070

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Akademický článek

Comparison of primary and secondary particle formation from natural gas engine exhaust and of their volatility characteristics

Autor: J. Alanen, P. Simonen, S. Saarikoski, H. Timonen, O. Kangasniemi, E. Saukko, R. Hillamo, K. Lehtoranta, T. Murtonen, H. Vesala, J. Keskinen, T. Rönkkö

Publikováno v: Atmospheric Chemistry and Physics, Vol 17, Pp 8739-8755 (2017)

Natural gas usage in the traffic and energy production sectors is a growing trend worldwide; thus, an assessment of its effects on air quality, human health and climate is required. Engine exhaust is a source of primary particulate emissions and s

Externí odkaz: https://doaj.org/article/3c308bd8119541c3a1c95f0b9801166b

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Akademický článek

Influence of fuel ethanol content on primary emissions and secondary aerosol formation potential for a modern flex-fuel gasoline vehicle

Autor: H. Timonen, P. Karjalainen, E. Saukko, S. Saarikoski, P. Aakko-Saksa, P. Simonen, T. Murtonen, M. Dal Maso, H. Kuuluvainen, M. Bloss, E. Ahlberg, B. Svenningsson, J. Pagels, W. H. Brune, J. Keskinen, D. R. Worsnop, R. Hillamo, T. Rönkkö

Publikováno v: Atmospheric Chemistry and Physics, Vol 17, Iss 8, Pp 5311-5329 (2017)

The effect of fuel ethanol content (10, 85 and 100 %) on primary emissions and on subsequent secondary aerosol formation was investigated for a Euro 5 flex-fuel gasoline vehicle. Emissions were characterized during a New European Driving Cycle (NEDC)

Externí odkaz: https://doaj.org/article/6d473ad768c34bac956551c476a314d2

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