Strong sesquiterpene emissions from Amazonian soils von Bourtsoukidis, E., Behrendt, T., Yañez-Serrano, A. M., Hellén, H., Diamantopoulos, E., Catão, E., Ashworth, K., Pozzer, A., Quesada, C. A., Martins, D. L., Sá, M., Araujo, A., Brito, J., Artaxo, P., Kesselmeier, J., Lelieveld, J., Williams, J.

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Secondary organic aerosol formation from idling gasoline passenger vehicle emissions investigated in a smog chamber von Nordin, E. Z, Eriksson, A. C, Roldin, P, Nilsson, P. T, Carlsson, J. E, Kajos, M. K, Hellén, H, Wittbom, C, Rissler, J, Löndahl, J, Swietlicki, E, Svenningsson, B, Bohgard, M, Kulmala, M, Hallquist, M, Pagels, J. H

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Ambient aromatic hydrocarbon measurements at Welgegund, South Africa von Jaars, K, Beukes, J. P, van Zyl, P. G, Venter, A. D, Josipovic, M, Pienaar, J. J, Vakkari, V, Aaltonen, H, Laakso, H, Kulmala, M, Tiitta, P, Guenther, A, Hellén, H, Laakso, L, Hakola, H

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Seasonal variation of VOC concentrations above a boreal coniferous forest von Hakola, H, Tarvainen, V, Laurila, T, Hiltunen, V, Hellén, H, Keronen, P

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Acidic reaction products of monoterpenes and sesquiterpenes in atmospheric fine particles in a boreal forest von Vestenius, M, Hellén, H, Levula, J, Kuronen, P, Helminen, K.J, Nieminen, T, Kulmala, M, Hakola, H

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Temperature and light dependence of the VOC emissions of Scots pine von Tarvainen, V., Hakola, H., Hellén, H., Bäck, J., Hari, P., Kulmala, M.

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In situ measurements of volatile organic compounds in a boreal forest von Hakola, H, Hellén, H, Hemmilä, M, Rinne, J, Kulmala, M

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Ambient measurements of aromatic and oxidized VOCs by PTR-MS and GC-MS: intercomparison between four instruments in a boreal forest in Finland von Kajos, M. K, Rantala, P, Hill, M, Hellén, H, Aalto, J, Patokoski, J, Taipale, R, Hoerger, C. C, Reimann, S, Ruuskanen, T. M, Rinne, J, Petäjä, T

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Importance of monoterpenes and isoprene in urban air in northern Europe von Hellén, H., Tykkä, T., Hakola, H.

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Boreal pine forest floor biogenic volatile organic compound emissions peak in early summer and autumn von Aaltonen, H., Pumpanen, J., Pihlatie, M., Hakola, H., Hellén, H., Kulmala, L., Vesala, T., Bäck, J.

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Heated stainless steel tube for ozone removal in the ambient air measurements of mono- and sesquiterpenes von Hellén, H., Kuronen, P., Hakola, H.

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Influence of residential wood combustion on local air quality von Hellén, H., Hakola, H., Haaparanta, S., Pietarila, H., Kauhaniemi, M.

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C2-C10 hydrocarbon emissions from a boreal wetland and forest floor von Hellén, H., Hakola, H., Pystynen, K.-H., Rinne, J., Haapanala, S.

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Ozone stress as a driving force of sesquiterpene emissions: a suggested parameterisation von Bourtsoukidis, E, Bonn, B, Dittmann, A, Hakola, H, Hellén, H, Jacobi, S

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Carbonyl compounds in boreal coniferous forest air in Hyytiälä, Southern Finland von Hellén, H., Hakola, H., Reissell, A., Ruuskanen, T. M.

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Stand type affects fluxes of volatile organic compounds from the forest floor in hemiboreal and boreal climates von Mäki, Mari, Krasnov, D., Hellén, H., Noe, S. M., Bäck, J.

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Assessing volatile organic compound sources in a boreal forest using positive matrix factorization (PMF) von Vestenius, M., Hopke, P.K., Lehtipalo, K., Petäjä, T., Hakola, H., Hellén, H.

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New insights into nocturnal nucleation von Ortega, I. K, Suni, T, Boy, M, Grönholm, T, Manninen, H. E, Nieminen, T, Ehn, M, Junninen, H, Hakola, H, Hellén, H, Valmari, T, Arvela, H, Zegelin, S, Hughes, D, Kitchen, M, Cleugh, H, Worsnop, D. R, Kulmala, M, Kerminen, V.-M

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In-situ observations of Eyjafjallajökull ash particles by hot-air balloon von Petäjä, T., Laakso, L., Grönholm, T., Launiainen, S., Evele-Peltoniemi, I., Virkkula, A., Leskinen, A., Backman, J., Manninen, H.E., Sipilä, M., Haapanala, S., Hämeri, K., Vanhala, E., Tuomi, T., Paatero, J., Aurela, M., Hakola, H., Makkonen, U., Hellén, H., Hillamo, R., Vira, J., Prank, M., Sofiev, M., Siitari-Kauppi, M., Laaksonen, A., lehtinen, K.E.J., Kulmala, M., Viisanen, Y., Kerminen, V.-M.

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Is forest management a significant source of monoterpenes into the boreal atmosphere? von Haapanala, S, Hakola, H, Hellén, H, Vestenius, M, Levula, J, Rinne, J

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