Search Results - "Portin, H."

Atmospheric submicron aerosol composition and particulate organic nitrate formation in a boreal forestland–urban mixed region by Hao, L. Q, Kortelainen, A, Romakkaniemi, S, Portin, H, Jaatinen, A, Leskinen, A, Komppula, M, Miettinen, P, Sueper, D, Pajunoja, A, Smith, J. N, Lehtinen, K. E. J, Worsnop, D. R, Laaksonen, A, Virtanen, A

“…The Puijo aerosol–cloud observation station is a unique measurement site for its location in the mixed region between the boreal forestland and the…”
Get full text

Biomass burning aerosols observed in Eastern Finland during the Russian wildfires in summer 2010 – Part 2: Remote sensing by Mielonen, T., Portin, H., Komppula, M., Leskinen, A., Tamminen, J., Ialongo, I., Hakkarainen, J., Lehtinen, K.E.J., Arola, A.

“…In the summer 2010 extensive wildfires in the western parts of Russia emitted massive amounts of smoke and aerosols into the atmosphere. These smoke plumes…”
Get full text

The effect of local sources on particle size and chemical composition and their role in aerosol–cloud interactions at Puijo measurement station by Portin, H, Leskinen, A, Hao, L, Kortelainen, A, Miettinen, P, Jaatinen, A, Laaksonen, A, Lehtinen, K. E. J, Romakkaniemi, S, Komppula, M

“…Interactions between aerosols and liquid water clouds were studied during autumns 2010–2011 at a semiurban measurement station on Puijo tower in Kuopio,…”
Get full text

Seasonal cycle and source analyses of aerosol optical properties in a semi-urban environment at Puijo station in Eastern Finland by Leskinen, A, Arola, A, Komppula, M, Portin, H, Tiitta, P, Miettinen, P, Romakkaniemi, S, Laaksonen, A, Lehtinen, K. E. J

“…We introduce a four-year (in 2006–2010) continuous data set of aerosol optical properties at Puijo in Kuopio, Finland. We study the annual and diurnal…”
Get full text

Biomass burning aerosols observed in Eastern Finland during the Russian wildfires in summer 2010 – Part 1: In-situ aerosol characterization by Portin, H., Mielonen, T., Leskinen, A., Arola, A., Pärjälä, E., Romakkaniemi, S., Laaksonen, A., Lehtinen, K.E.J., Komppula, M.

“…Biomass burning smoke and associated aerosol particles from wildfires near Moscow, Russia during summer 2010 had a significant impact on air quality both in…”
Get full text

Sensitivity of a continental night‐time stratocumulus‐topped boundary layer to varying environmental conditions by Leung, W.‐Y. H., Savre, J., Bender, F. A.‐M., Komppula, M., Portin, H., Romakkaniemi, S., Sedlar, J., Noone, K., Ekman, A. M. L.

“…Large‐eddy simulation of a nocturnal stratocumulus‐topped boundary layer in a continental midlatitude environment has been performed to examine the sensitivity…”
Get full text

In-depth characterization of submicron particulate matter inter-annual variations at a street canyon site in northern Europe by Barreira, Luis M. F, Helin, Aku, Aurela, Minna, Teinilä, Kimmo, Friman, Milla, Kangas, Leena, Niemi, Jarkko V, Portin, Harri, Kousa, Anu, Pirjola, Liisa, Rönkkö, Topi, Saarikoski, Sanna, Timonen, Hilkka

“…Atmospheric aerosols play an important role in air pollution. Aerosol particle chemical composition is highly variable depending on the season, hour of the…”
Get full text

Source apportionment of particle number size distribution at the street canyon and urban background sites by Harni, Sami D, Aurela, Minna, Saarikoski, Sanna, Niemi, Jarkko V, Portin, Harri, Manninen, Hanna, Leinonen, Ville, Aalto, Pasi, Hopke, Phil K, Petäjä, Tuukka, Rönkkö, Topi, Timonen, Hilkka

“…Particle size is one of the key factors influencing how aerosol particles affect their climate and health effects. Therefore, a better understanding of…”
Get full text

The effect of meteorological conditions and atmospheric composition in the occurrence and development of new particle formation (NPF) events in Europe by Bousiotis, Dimitrios, Brean, James, Pope, Francis D, Dall'Osto, Manuel, Querol, Xavier, Alastuey, Andrés, Perez, Noemi, Petäjä, Tuukka, Massling, Andreas, Nøjgaard, Jacob Klenø, Nordstrøm, Claus, Kouvarakis, Giorgos, Vratolis, Stergios, Eleftheriadis, Konstantinos, Niemi, Jarkko V, Portin, Harri, Wiedensohler, Alfred, Weinhold, Kay, Merkel, Maik, Tuch, Thomas, Harrison, Roy M

“…Although new particle formation (NPF) events have been studied extensively for some decades, the mechanisms that drive their occurrence and development are yet…”
Get full text

Measurement report: The influence of traffic and new particle formation on the size distribution of 1–800 nm particles in Helsinki – a street canyon and an urban background station comparison by Okuljar, Magdalena, Kuuluvainen, Heino, Kontkanen, Jenni, Garmash, Olga, Olin, Miska, Niemi, Jarkko V, Timonen, Hilkka, Kangasluoma, Juha, Tham, Yee Jun, Baalbaki, Rima, Sipilä, Mikko, Salo, Laura, Lintusaari, Henna, Portin, Harri, Teinilä, Kimmo, Aurela, Minna, Dal Maso, Miikka, Rönkkö, Topi, Petäjä, Tuukka, Paasonen, Pauli

“…Most of the anthropogenic air pollution sources are located in urban environments. The contribution of these sources to the population of atmospheric particles…”
Get full text

Observations on aerosol optical properties and scavenging during cloud events by Ruuskanen, Antti, Romakkaniemi, Sami, Kokkola, Harri, Arola, Antti, Mikkonen, Santtu, Portin, Harri, Virtanen, Annele, Lehtinen, Kari E. J, Komppula, Mika, Leskinen, Ari

“…Long-term statistics of atmospheric aerosol and especially cloud scavenging were studied at the Puijo measurement station in Kuopio, Finland, during October…”
Get full text

A phenomenology of new particle formation (NPF) at 13 European sites by Bousiotis, Dimitrios, Pope, Francis D, Beddows, David C. S, Dall'Osto, Manuel, Massling, Andreas, Nøjgaard, Jakob Klenø, Nordstrøm, Claus, Niemi, Jarkko V, Portin, Harri, Petäjä, Tuukka, Perez, Noemi, Alastuey, Andrés, Querol, Xavier, Kouvarakis, Giorgos, Mihalopoulos, Nikos, Vratolis, Stergios, Eleftheriadis, Konstantinos, Wiedensohler, Alfred, Weinhold, Kay, Merkel, Maik, Tuch, Thomas, Harrison, Roy M

“…New particle formation (NPF) events occur almost everywhere in the world and can play an important role as a particle source. The frequency and characteristics…”
Get full text

In-cloud measurements highlight the role of aerosol hygroscopicity in cloud droplet formation by Väisänen, Olli, Ruuskanen, Antti, Ylisirniö, Arttu, Miettinen, Pasi, Portin, Harri, Hao, Liqing, Leskinen, Ari, Komppula, Mika, Romakkaniemi, Sami, Lehtinen, Kari E. J, Virtanen, Annele

“…The relationship between aerosol hygroscopicity and cloud droplet activation was studied at the Puijo measurement station in Kuopio, Finland, during the autumn…”
Get full text