Search Results - "Sipila, M."

Particle Size Magnifier for Nano-CN Detection by Vanhanen, J., Mikkilä, J., Lehtipalo, K., Sipilä, M., Manninen, H. E., Siivola, E., Petäjä, T., Kulmala, M.

“…A new particle size magnifier (PSM) for detection of nano-CN as small as ∼1 nm in mobility diameter was developed, calibrated and tested in atmospheric…”
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Atmospheric sulphuric acid and neutral cluster measurements using CI-APi-TOF by Jokinen, T, Sipilä, M, Junninen, H, Ehn, M, Lönn, G, Hakala, J, Petäjä, T, Mauldin III, R. L, Kulmala, M, Worsnop, D. R

“…The first ambient measurements using nitrate ion based Chemical Ionization with the Atmospheric Pressure interface Time-Of-Flight mass spectrometer…”
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Effect of ions on sulfuric acid‐water binary particle formation: 2. Experimental data and comparison with QC‐normalized classical nucleation theory by Duplissy, J., Merikanto, J., Franchin, A., Tsagkogeorgas, G., Kangasluoma, J., Wimmer, D., Vuollekoski, H., Schobesberger, S., Lehtipalo, K., Flagan, R. C., Brus, D., Donahue, N. M., Vehkamäki, H., Almeida, J., Amorim, A., Barmet, P., Bianchi, F., Breitenlechner, M., Dunne, E. M., Guida, R., Henschel, H., Junninen, H., Kirkby, J., Kürten, A., Kupc, A., Määttänen, A., Makhmutov, V., Mathot, S., Nieminen, T., Onnela, A., Praplan, A. P., Riccobono, F., Rondo, L., Steiner, G., Tome, A., Walther, H., Baltensperger, U., Carslaw, K. S., Dommen, J., Hansel, A., Petäjä, T., Sipilä, M., Stratmann, F., Vrtala, A., Wagner, P. E., Worsnop, D. R., Curtius, J., Kulmala, M.

“…We report comprehensive, demonstrably contaminant‐free measurements of binary particle formation rates by sulfuric acid and water for neutral and ion‐induced…”
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Reactivity of stabilized Criegee intermediates (sCIs) from isoprene and monoterpene ozonolysis toward SO2 and organic acids by Sipilae, M, Jokinen, T, Berndt, T, Richters, S, Makkonen, R, Donahue, N M, Mauldin, R L, Kurten, T, Paasonen, P, Sarnela, N

“…Oxidation processes in Earth's atmosphere are tightly connected to many environmental and human health issues and are essential drivers for biogeochemistry…”
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Influence of biogenic emissions from boreal forests on aerosol–cloud interactions by Petäjä, T., Tabakova, K., Manninen, A., Ezhova, E., O’Connor, E., Moisseev, D., Sinclair, V. A., Backman, J., Levula, J., Luoma, K., Virkkula, A., Paramonov, M., Räty, M., Äijälä, M., Heikkinen, L., Ehn, M., Sipilä, M., Yli-Juuti, T., Virtanen, A., Ritsche, M., Hickmon, N., Pulik, G., Rosenfeld, D., Worsnop, D. R., Bäck, J., Kulmala, M., Kerminen, V.-M.

“…Boreal forest acts as a carbon sink and contributes to the formation of secondary organic aerosols via emission of aerosol precursor compounds. However, these…”
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Ion-induced sulfuric acid-ammonia nucleation drives particle formation in coastal Antarctica by Jokinen, T, Sipilä, M, Kontkanen, J, Vakkari, V, Tisler, P, Duplissy, E-M, Junninen, H, Kangasluoma, J, Manninen, H E, Petäjä, T, Kulmala, M, Worsnop, D R, Kirkby, J, Virkkula, A, Kerminen, V-M

“…Formation of new aerosol particles from trace gases is a major source of cloud condensation nuclei (CCN) in the global atmosphere, with potentially large…”
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Enhancing the provision of health and social care in Europe through eHealth by De Raeve, P., Gomez, S., Hughes, P., Lyngholm, T., Sipilä, M., Kilanska, D., Hussey, P., Xyrichis, A.

“…Aim To report on the outcomes of the European project ENS4Care, which delivered evidence‐based guidelines enabling implementation of eHealth services in…”
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Observation and modelling of HOx radicals in a boreal forest by K. Hens, A. Novelli, M. Martinez, J. Auld, R. Axinte, B. Bohn, H. Fischer, P. Keronen, D. Kubistin, A. C. Nölscher, R. Oswald, P. Paasonen, T. Petäjä, E. Regelin, R. Sander, V. Sinha, M. Sipilä, D. Taraborrelli, C. Tatum Ernest, J. Williams, J. Lelieveld, H. Harder

“…Measurements of OH and HO2 radicals were conducted in a pine-dominated forest in southern Finland during the HUMPPA-COPEC-2010 (Hyytiälä United Measurements of…”
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A comparison of HONO budgets for two measurement heights at a field station within the boreal forest in Finland by Oswald, R, Ermel, M, Hens, K, Novelli, A, Ouwersloot, H. G, Paasonen, P, Petäjä, T, Sipilä, M, Keronen, P, Bäck, J, Königstedt, R, Hosaynali Beygi, Z, Fischer, H, Bohn, B, Kubistin, D, Harder, H, Martinez, M, Williams, J, Hoffmann, T, Trebs, I, Sörgel, M

“…Atmospheric concentrations of nitrous acid (HONO), one of the major precursors of the hydroxyl radical (OH) in the troposphere, significantly exceed the values…”
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Contribution of sulfuric acid and oxidized organic compounds to particle formation and growth by Riccobono, F, Rondo, L, Sipilä, M, Barmet, P, Curtius, J, Dommen, J, Ehn, M, Ehrhart, S, Kulmala, M, Kürten, A, Mikkilä, J, Paasonen, P, Petäjä, T, Weingartner, E, Baltensperger, U

“…Lack of knowledge about the mechanisms underlying new particle formation and their subsequent growth is one of the main causes for the large uncertainty in…”
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Enhancement of atmospheric H2SO4 / H2O nucleation: organic oxidation products versus amines by Berndt, T, Sipilä, M, Stratmann, F, Petäjä, T, Vanhanen, J, Mikkilä, J, Patokoski, J, Taipale, R, III, R L. Mauldin, Kulmala, M

“…Atmospheric H2 SO4 / H2 O nucleation influencing effects have been studied in the flow tube IfT-LFT (Institute for Tropospheric Research - Laminar Flow Tube)…”
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Major contribution of neutral clusters to new particle formation at the interface between the boundary layer and the free troposphere by Rose, C, Sellegri, K, Asmi, E, Hervo, M, Freney, E, Colomb, A, Junninen, H, Duplissy, J, Sipilä, M, Kontkanen, J, Lehtipalo, K, Kulmala, M

“…The formation of new aerosol particles in the atmosphere is a key process influencing the aerosol number concentration as well as the climate, in particular at…”
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On the composition of ammonia–sulfuric-acid ion clusters during aerosol particle formation by Schobesberger, S, Franchin, A, Bianchi, F, Rondo, L, Duplissy, J, Kuerten, A, Ortega, I K, Metzger, A, Schnitzhofer, R, Almeida, J

“…The formation of particles from precursor vapors is an important source of atmospheric aerosol. Research at the Cosmics Leaving OUtdoor Droplets (CLOUD)…”
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Estimates of global dew collection potential on artificial surfaces by Vuollekoski, H, Vogt, M, Sinclair, V. A, Duplissy, J, Järvinen, H, Kyrö, E.-M, Makkonen, R, Petäjä, T, Prisle, N. L, Räisänen, P, Sipilä, M, Ylhäisi, J, Kulmala, M

“…The global potential for collecting usable water from dew on an artificial collector sheet was investigated by utilizing 34 years of meteorological reanalysis…”
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Oxidation of SO2 by stabilized Criegee intermediate (sCI) radicals as a crucial source for atmospheric sulfuric acid concentrations by M. Boy, D. Mogensen, S. Smolander, L. Zhou, T. Nieminen, P. Paasonen, C. Plass-Dülmer, M. Sipilä, T. Petäjä, L. Mauldin, H. Berresheim, M. Kulmala

“…The effect of increased reaction rates of stabilized Criegee intermediates (sCIs) with SO2 to produce sulfuric acid is investigated using data from two…”
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Total sulfate vs. sulfuric acid monomer concenterations in nucleation studies by Neitola, K, Brus, D, Makkonen, U, Sipilä, M, Mauldin III, R. L, Sarnela, N, Jokinen, T, Lihavainen, H, Kulmala, M

“…Sulfuric acid is known to be a key component for atmospheric nucleation. Precise determination of sulfuric-acid concentration is a crucial factor for…”
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The effect of H2SO4 - amine clustering on chemical ionization mass spectrometry (CIMS) measurements of gas-phase sulfuric acid by Kurtén, T, Petäjä, T, Smith, J, Ortega, I K, Sipilä, M, Junninen, H, Ehn, M, Vehkamäki, H, Mauldin, L, Worsnop, D R, Kulmala, M

“…The state-of-the art method for measuring atmospheric gas-phase sulfuric acid is chemical ionization mass spectrometry (CIMS) based on nitrate reagent ions. We…”
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Effect of dimethylamine on the gas phase sulfuric acid concentration measured by Chemical Ionization Mass Spectrometry by Rondo, L., Ehrhart, S., Kürten, A., Adamov, A., Bianchi, F., Breitenlechner, M., Duplissy, J., Franchin, A., Dommen, J., Donahue, N. M., Dunne, E. M., Flagan, R. C., Hakala, J., Hansel, A., Keskinen, H., Kim, J., Jokinen, T., Lehtipalo, K., Leiminger, M., Praplan, A., Riccobono, F., Rissanen, M. P., Sarnela, N., Schobesberger, S., Simon, M., Sipilä, M., Smith, J. N., Tomé, A., Tröstl, J., Tsagkogeorgas, G., Vaattovaara, P., Winkler, P. M., Williamson, C., Wimmer, D., Baltensperger, U., Kirkby, J., Kulmala, M., Petäjä, T., Worsnop, D. R., Curtius, J.

“…Sulfuric acid is widely recognized as a very important substance driving atmospheric aerosol nucleation. Based on quantum chemical calculations it has been…”
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Bisulfate – cluster based atmospheric pressure chemical ionization mass spectrometer for high-sensitivity (< 100 ppqV) detection of atmospheric dimethyl amine: proof-of-concept and first ambient data from boreal forest by Sipilä, M, Sarnela, N, Jokinen, T, Junninen, H, Hakala, J, Rissanen, M. P, Praplan, A, Simon, M, Kürten, A, Bianchi, F, Dommen, J, Curtius, J, Petäjä, T, Worsnop, D. R

“…Atmospheric amines may play a crucial role in formation of new aerosol particles via nucleation with sulfuric acid. Recent studies have revealed that…”
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Nanoparticles in boreal forest and coastal environment: a comparison of observations and implications of the nucleation mechanism by Lehtipalo, K., Kulmala, M., Sipilä, M., Petäjä, T., Vana, M., Ceburnis, D., Dupuy, R., O'Dowd, C.

“…The detailed mechanism of secondary new particle formation in the atmosphere is still under debate. It is proposed that particle formation happens via…”
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