P
Pasi Aalto
Researcher at University of Helsinki
Publications - 218
Citations - 15816
Pasi Aalto is an academic researcher from University of Helsinki. The author has contributed to research in topics: Aerosol & Particle. The author has an hindex of 68, co-authored 214 publications receiving 14789 citations. Previous affiliations of Pasi Aalto include Helsinki Institute of Physics & Finnish Institute of Occupational Health.
Papers
More filters
Journal Article
Formation and growth of fresh atmospheric aerosols: eight years of aerosol size distribution data from SMEAR II, Hyytiälä, Finland
Miikka Dal Maso,Markku Kulmala,Ilona Riipinen,Robert Wagner,Tareq Hussein,Pasi Aalto,Kari E. J. Lehtinen +6 more
TL;DR: In this paper, the authors analyzed size distributions measured continuously at a boreal forest measurement site at Hyytiala, Finland between 1996 and 2003 and identified days when new aerosol particle formation was taking place as well as days when no formation was detected, removing days with ambiguous status.
Journal ArticleDOI
Mobility particle size spectrometers: harmonization of technical standards and data structure to facilitate high quality long-term observations of atmospheric particle number size distributions
Alfred Wiedensohler,Wolfram Birmili,Andreas Nowak,A. Sonntag,Kay Weinhold,Maik Merkel,Birgit Wehner,Thomas Tuch,Sascha Pfeifer,Markus Fiebig,A. M. Fjäraa,Eija Asmi,Karine Sellegri,R. Depuy,H. Venzac,P. Villani,Paolo Laj,Pasi Aalto,John A. Ogren,Erik Swietlicki,Paul I. Williams,Pontus Roldin,Paul Quincey,Christoph Hüglin,R. Fierz-Schmidhauser,Martin Gysel,Ernest Weingartner,Francesco Riccobono,Sebastiao Martins Dos Santos,C. Grüning,K.H. Faloon,David C. S. Beddows,Roy M. Harrison,Ciaran Monahan,S. G. Jennings,Colin D. O'Dowd,A. Marinoni,Hans-Georg Horn,L. Keck,Jingkun Jiang,Jacob H. Scheckman,Peter H. McMurry,Zhaoze Deng,Chunsheng Zhao,M. Moerman,Bas Henzing,G. de Leeuw,G. de Leeuw,G. Löschau,Susanne Bastian +49 more
TL;DR: In this article, the authors compared commercial and custom-made inversion routines to calculate the particle number size distributions from the measured electrical mobility distribution, and concluded that the consistency of these reference instruments to the total particle number concentration was less than 5%.
Journal ArticleDOI
On the formation, growth and composition of nucleation mode particles
Markku Kulmala,M. Dal Maso,Jyrki M. Mäkelä,Liisa Pirjola,M. Väkevä,Pasi Aalto,P. Miikkulainen,Kaarle Hämeri,Colin D. O'Dowd +8 more
TL;DR: In this article, a new analytical tool was developed to derive formation and growth properties of nucleation mode aerosols, taking advantage of only the measured aerosol particles spectral evolution as a function of time.
Journal ArticleDOI
High Natural Aerosol Loading over Boreal Forests
Peter Tunved,Hans-Christen Hansson,V.-M. Kerminen,Johan Ström,M. Dal Maso,Heikki Lihavainen,Y. Viisanen,Pasi Aalto,Mika Komppula,Markku Kulmala +9 more
TL;DR: Evidence is presented that the European boreal region is a substantial source of both aerosol mass and aerosol number, which has important implications for radiation budget estimates and relevancy for the evaluation of feedback loops believed to determine the future climate.
Journal ArticleDOI
Aerosol formation: atmospheric particles from organic vapours.
TL;DR: It is shown, to the knowledge for the first time, that these newly formed particles are composed primarily of organic species, such as cis-pinonic acid and pinic acid, produced by oxidation of terpenes in organic vapours released from the canopy.