Zobrazeno 1 - 10
of 76
pro vyhledávání: '"Toivo Pohja"'
Autor:
Liisa Pirjola, Toivo Pohja, Pertti Hari, Tiia Grönholm, Timo H. Virtanen, Maija Kajos, P. P. Aalto, Janne Rinne, Johanna Patokoski, John Backman, Mari Pihlatie, Jukka Pumpanen, David M. Schultz, A. J. Kieloaho, Jaakko Kukkonen, Jaana Bäck, G. de Leeuw, Hermanni Aaltonen, V. Aaltonen, Markku Kulmala, Heikki Junninen, V.-M. Kerminen, Taina Ruuskanen, Taru Olsson, Craig B. Clements, Hanna E. Manninen, Janne Levula, Petri Keronen, M. Dal Maso, Tuukka Petäjä, Tuomo Nieminen, Aki Virkkula, Liisa Kulmala, Juho Aalto, Siegfried Schobesberger, Mikhail Sofiev
Publikováno v:
Atmospheric Chemistry and Physics, Vol 14, Iss 9, Pp 4473-4502 (2014)
Virkkula, A, Levula, J, Pohja, T, Aalto, P P, Keronen, P, Schobesberger, S, Clements, C B, Pirjola, L, Kieloaho, A J, Kulmala, L, Aaltonen, H, Patokoski, J, Pumpanen, J, Rinne, J, Ruuskanen, T, Pihlatie, M, Manninen, H E, Aaltonen, V, Junninen, H, Petäjä, T, Backman, J, Dal Maso, M, Nieminen, T, Olsson, T, Grönholm, T, Aalto, J, Virtanen, T H, Kajos, M, Kerminen, V M, Schultz, D M, Kukkonen, J, Sofiev, M, De Leeuw, G, Bäck, J, Hari, P & Kulmala, M 2014, ' Prescribed burning of logging slash in the boreal forest of Finland: Emissions and effects on meteorological quantities and soil properties ', Atmospheric Chemistry and Physics, vol. 14, no. 9, pp. 4473-4502 . https://doi.org/10.5194/acp-14-4473-2014
Virkkula, A, Levula, J, Pohja, T, Aalto, P P, Keronen, P, Schobesberger, S, Clements, C B, Pirjola, L, Kieloaho, A J, Kulmala, L, Aaltonen, H, Patokoski, J, Pumpanen, J, Rinne, J, Ruuskanen, T, Pihlatie, M, Manninen, H E, Aaltonen, V, Junninen, H, Petäjä, T, Backman, J, Dal Maso, M, Nieminen, T, Olsson, T, Grönholm, T, Aalto, J, Virtanen, T H, Kajos, M, Kerminen, V M, Schultz, D M, Kukkonen, J, Sofiev, M, De Leeuw, G, Bäck, J, Hari, P & Kulmala, M 2014, ' Prescribed burning of logging slash in the boreal forest of Finland: Emissions and effects on meteorological quantities and soil properties ', Atmospheric Chemistry and Physics, vol. 14, no. 9, pp. 4473-4502 . https://doi.org/10.5194/acp-14-4473-2014
A prescribed fire experiment was conducted on 26 June 2009 in Hyytiälä, Finland, to study aerosol and trace gas emissions from prescribed fires of slash fuels and the effects of fire on soil properties in a controlled environment. A 0.8 ha forest n
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::9e13f327dc4063217e0030b643621b56
http://www.atmos-chem-phys.net/14/4473/2014/acp-14-4473-2014.pdf
http://www.atmos-chem-phys.net/14/4473/2014/acp-14-4473-2014.pdf
Autor:
Petri Keronen, Heikki Laakso, Erkki Siivola, Tuomo Nieminen, P. P. Aalto, V. M. Kerminen, Markku Kulmala, Ville Vakkari, Tuukka Petäjä, Lauri Laakso, Toivo Pohja
Publikováno v:
Aerosol and Air Quality Research
The characterization of atmospheric aerosol properties and trace gas concentrations in various environments provides a basis for scientific research on the assessment of their roles in the climate system, as well as regional air quality issues. Howev
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::7119f52989ff208adfd5191edd2fb900
https://doi.org/10.4209/aaqr.2012.08.0207
https://doi.org/10.4209/aaqr.2012.08.0207
Autor:
Riikka Väänänen, Radovan Krejci, Hanna E. Manninen, Antti Manninen, Janne Lampilahti, Stephany Buenrostro Mazon, Tuomo Nieminen, Taina Yli-Juuti, Jenni Kontkanen, Ari Asmi, Pasi P. Aalto, Petri Keronen, Toivo Pohja, Ewan O'Connor, Veli-Matti Kerminen, Tuukka Petäjä, Markku Kulmala
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::1a1e83c7703975b76f52842c191cbd9c
https://doi.org/10.5194/acp-2016-556-supplement
https://doi.org/10.5194/acp-2016-556-supplement
Autor:
D. Phalatse, Heikki Laakso, Tuomo Nieminen, D. Mabaso, Erkki Siivola, K. Pienaar, Markku Kulmala, M. Molefe, V.-M. Kerminen, Nnenesi A. Kgabi, Petri Keronen, Tuukka Petäjä, Lauri Laakso, Toivo Pohja, Pasi Aalto
Publikováno v:
Atmospheric Chemistry and Physics. 8:4823-4839
We have analyzed one year (July 2006–July 2007) of measurement data from a relatively clean background site located in dry savannah in South Africa. The annual-median trace gas concentrations were equal to 0.7 ppb for SO2, 1.4 ppb for NOx, 36 ppb f
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::9c11c938061a4d495c1b77db48546b88
https://doi.org/10.5194/acp-8-4823-2008
https://doi.org/10.5194/acp-8-4823-2008
Autor:
Albert Porcar-Castell, Jaana Bäck, Toivo Pohja, Pertti Hari, Jon Atherton, Eero Nikinmaa, Juho Aalto, Pasi Kolari, Tuukka Petäjä
Publikováno v:
Plant, Cell & Environment
Emissions of biogenic volatile organic compounds (BVOC) by boreal evergreen trees have strong seasonality, with low emission rates during photosynthetically inactive winter and increasing rates towards summer. Yet, the regulation of this seasonality
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::cf4574f70e1e040a3bec1ffe367c2e7e
http://hdl.handle.net/10138/208064
http://hdl.handle.net/10138/208064
Autor:
Petri Keronen, M. Dal Maso, Pasi Aalto, Boris Bonn, Saara Hyvönen, Tiia Grönholm, Veijo Hiltunen, Samuli Launiainen, Markku Kulmala, Heikki Junninen, Heikki Mannila, Lauri Laakso, Pertti Hari, Toivo Pohja
Publikováno v:
Atmospheric Chemistry and Physics
Atmospheric Chemistry and Physics, European Geosciences Union, 2005, 5 (12), pp.3345-3356
Scopus-Elsevier
ResearcherID
Atmospheric Chemistry and Physics, Vol 5, Iss 12, Pp 3345-3356 (2005)
Atmospheric Chemistry and Physics, European Geosciences Union, 2005, 5 (12), pp.3345-3356
Scopus-Elsevier
ResearcherID
Atmospheric Chemistry and Physics, Vol 5, Iss 12, Pp 3345-3356 (2005)
Atmospheric aerosol particle formation is frequently observed throughout the atmosphere, but despite various attempts of explanation, the processes behind it remain unclear. In this study data mining techniques were used to find the key parameters ne
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::8843cc89b404a9f538a5ab67b01f3411
https://doi.org/10.5194/acp-5-3345-2005
https://doi.org/10.5194/acp-5-3345-2005
Autor:
Üllar Rannik, Anca Gaman, Timo Vesala, Erkki Siivola, Markku Kulmala, Pasi Aalto, Toivo Pohja
Publikováno v:
Journal of Atmospheric and Oceanic Technology. 21:933-943
A novel relaxed eddy accumulation (REA) system for aerosol particle flux measurement has been developed and tested. The system consisted of a fast-response sonic anemometer, a flow system, and software for operating the valves and the concentration a
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::49a0153bc4965b61bc55e918a6a2214f
https://doi.org/10.1175/1520-0426(2004)021<0933:reasfs>2.0.co
https://doi.org/10.1175/1520-0426(2004)021<0933:reasfs>2.0.co
Autor:
Jaana Bäck, Petri Keronen, Timo Vesala, Toivo Pohja, Markku Kulmala, Pertti Hari, Tapio Linkosalo, Nuria Altimir
Publikováno v:
Plant, Cell & Environment. 22:1297-1301
Measurements of rapid changes in concentrations and fluxes of gaseous compounds relating to photosynthetic gas exchange are commonly performed using flow-through cuvettes in connection with infrared gas analysers. The accuracy and repeatability of th
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::998d1fc4392b231bf644946a9b2b1d8c
https://doi.org/10.1046/j.1365-3040.1999.00478.x
https://doi.org/10.1046/j.1365-3040.1999.00478.x
Autor:
Pasi Aalto, Tiina Markkanen, Markku Kulmala, H. Lihavainen, Ari Nissinen, Jyrki M. Mäkelä, Sari Palmroth, Vilho Jokinen, Toivo Pohja, K. Seitsonen
Publikováno v:
Geophysical Research Letters. 24:1219-1222
Number size distribution of ambient submicron and ultrafine aerosol particles have been measured on a continuous basis (every 10 minutes) for three quarters of the year 1996, at a forest site in Southern Finland. Continuous monitoring offers addition
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::ea6b16c90ee78bfab65f9575f3687a68
https://doi.org/10.1029/97gl00920
https://doi.org/10.1029/97gl00920
Autor:
Jaakko Kukkonen, Hermanni Aaltonen, A. J. Kieloaho, Liisa Kulmala, Johanna Patokoski, Liisa Pirjola, A. Virkkula, Pasi Aalto, Tiia Grönholm, Jaana Bäck, Tuomo Nieminen, Heikki Junninen, T. M. Ruuskanen, G. de Leeuw, Taru Olsson, Mari Pihlatie, John Backman, David M. Schultz, Janne Rinne, V. Aaltonen, Siegfried Schobesberger, Tuukka Petäjä, V.-M. Kerminen, Janne Levula, Mikhail Sofiev, Jukka Pumpanen, Petri Keronen, M. Dal Maso, M. Kulmala, Toivo Pohja, Hanna E. Manninen, Pertti Hari, Craig B. Clements
A prescribed burning of a boreal forest was conducted on 26 June 2009 in Hyytiälä, Finland, to study aerosol and trace gas emissions from wildfires and the effects of fire on soil properties in a controlled environment. A 0.8 ha forest near the SME
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::50abde662a96c72650099eb0229897d2
https://doi.org/10.5194/acpd-13-21703-2013
https://doi.org/10.5194/acpd-13-21703-2013