User profiles for Kari Lehtinen

Kari Lehtinen

Professor of Applied Physics
Verified email at uef.fi
Cited by 18799

Direct observations of atmospheric aerosol nucleation

…, JN Smith, M Ehn, TF Mentel, KEJ Lehtinen… - Science, 2013 - science.org
Atmospheric nucleation is the dominant source of aerosol particles in the global atmosphere
and an important player in aerosol climatic effects. The key steps of this process occur in the …

[PDF][PDF] Formation and growth of fresh atmospheric aerosols: eight years of aerosol size distribution data from SMEAR II, Hyytiälä, Finland

…, R Wagner, T Hussein, PP Aalto, KEJ Lehtinen - Boreal environment …, 2005 - Citeseer
We analyzed size distributions measured continuously at a boreal forest measurement site
at Hyytiälä, Finland between 1996 and 2003. From the eight-year data we identified days …

An improved parameterization for sulfuric acid–water nucleation rates for tropospheric and stratospheric conditions

…, M Kulmala, I Napari, KEJ Lehtinen… - Journal of …, 2002 - Wiley Online Library
In this paper we present parameterized equations for calculation of sulfuric acid–water
critical nucleus compositions, critical cluster radii and homogeneous nucleation rates for …

Toward direct measurement of atmospheric nucleation

…, RM Harrison, I Hanson, C Leung, KEJ Lehtinen… - Science, 2007 - science.org
Atmospheric aerosol formation is known to occur almost all over the world, and the importance
of these particles to climate and air quality has been recognized. Although almost all of …

Measurement of the nucleation of atmospheric aerosol particles

…, H Junninen, P Paasonen, I Riipinen, KEJ Lehtinen… - Nature protocols, 2012 - nature.com
The formation of new atmospheric aerosol particles and their subsequent growth have been
observed frequently at various locations all over the world. The atmospheric nucleation rate (…

Mortality and causes of death in 398 patients admitted to hospital with ankylosing spondylitis.

K Lehtinen - Annals of the rheumatic diseases, 1993 - ard.bmj.com
The mortality and causes of death in 398 patients (47 women, 351 men) with definite
ankylosing spondylitis, admitted to hospital for the first time between 1961 and 1969, were …

Heterogeneous nucleation experiments bridging the scale from molecular ion clusters to nanoparticles

…, A Vrtala, H Vehkamaki, M Noppel, KEJ Lehtinen… - Science, 2008 - science.org
Generation, investigation, and manipulation of nanostructured materials are of fundamental
and practical importance for several disciplines, including materials science and medicine. …

Condensation and coagulation sinks and formation of nucleation mode particles in coastal and boreal forest boundary layers

M Dal Maso, M Kulmala, KEJ Lehtinen… - Journal of …, 2002 - Wiley Online Library
The formation and growth of new particles has been evaluated using a revised version of a
simple, but novel, theoretical tool. The concentration of condensable vapors and their source …

Estimating nucleation rates from apparent particle formation rates and vice versa: Revised formulation of the Kerminen–Kulmala equation

KEJ Lehtinen, M Dal Maso, M Kulmala… - Journal of Aerosol …, 2007 - Elsevier
Connections between observed particle formation rates (typically at diameter 3nm or larger)
and the actual nucleation rates have important applications in atmospheric science. First, …

Measurements in a highly polluted Asian mega city: observations of aerosol number size distribution, modal parameters and nucleation events

P Mönkkönen, IK Koponen, KEJ Lehtinen… - Atmospheric …, 2005 - acp.copernicus.org
Diurnal variation of number size distribution (particle size 3-800nm) and modal parameters (geometric
standard deviation, geometric mean diameter and modal aerosol particle …