Zobrazeno 1 - 5
of 5
pro vyhledávání: '"Esko Valkonen"'
Autor:
Jaakko Kukkonen, Jari Walden, Päivi Aarnio, Tarja Koskentalo, Ari Karppinen, Ruwim Berkowicz, Raimo Kartastenpää, Esko Valkonen
Publikováno v:
Atmospheric Environment. 35:231-243
In 1997, a measuring campaign was conducted in a street canyon (Runeberg St.) in Helsinki. Hourly mean concentrations of CO, NOx, NO2 and O3 were measured at street and roof levels, the latter in order to determine the urban background concentrations
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::2933d51277d58839a7269fdf6b581606
https://doi.org/10.1016/s1352-2310(00)00200-4
https://doi.org/10.1016/s1352-2310(00)00200-4
Autor:
Esko Valkonen, Jaakko Kukkonen, Jari Härkönen, Mervi Konttinen, Tarja Koskentalo, Ari Karppinen, T. Elolähde
Publikováno v:
Air Pollution Modeling and Its Application XII ISBN: 9781475791303
This paper describes the development of a modelling system for predicting the emissions, dispersion and chemical transformation of nitrogen oxides in an urban area. The system takes into account of all source categories, including stationary point an
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::eefa616f5e828355a40e34fdd527c222
https://doi.org/10.1007/978-1-4757-9128-0_58
https://doi.org/10.1007/978-1-4757-9128-0_58
Autor:
J. Laurikko, A. Karppinen, Jari Walden, Jari Härkönen, T. Elolähde, E. Rantakrans, T. Koskentalo, Liisa Jalkanen, P. Aarnio, S. Haarala, Jaakko Kukkonen, Esko Valkonen
Publikováno v:
Air Pollution Modeling and Its Application XI ISBN: 9781461376781
We discuss studies on urban air quality in the Helsinki metropolitan area. This area includes four cities, which have a total population of 850 000. We have conducted comprehensive emission surveys comprising mobile and stationary sources, in 1990 an
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::ad92a877c2992c078e4437844505b59d
https://doi.org/10.1007/978-1-4615-5841-5_71
https://doi.org/10.1007/978-1-4615-5841-5_71
Publikováno v:
International Journal of Vehicle Design. 20:125
A major fraction of nitrogen oxides released from traffic is commonly nitrogen monoxide (NO); however, the proportion of NO2 in exhaust emissions can range from less than 1% to more than 50%. The released NO is chemically transformed into the more ha
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::4f86ee916228aa826a8a50b9bd32a65d
https://doi.org/10.1504/ijvd.1998.001823
https://doi.org/10.1504/ijvd.1998.001823
Autor:
An Karppinen, Jaakko Kukkonen, Mervi Konttinen, Jan Harkonen, N.A. Erkki, N.A. Rantakrans, Esko Valkonen, Tarja Koskentalo, Timo Elolahde
Publikováno v:
International Journal of Vehicle Design. 20:131
We have developed a modelling system for evaluating the emissions, dispersion and chemical transformation of nitrogen oxides from traffic. This paper presents an application of the system for estimating the NO2 and NOx concentrations in the Helsinki
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::17e60e314990872c492018de73405854
https://doi.org/10.1504/ijvd.1998.001825
https://doi.org/10.1504/ijvd.1998.001825