Makkonen, R., Asmi, A., Korhonen, H., Kokkola, H., Järvenoja, S., Räisänen, P., ...
The global aerosol-climate model ECHAM5-HAM was modified to improve the representation of new particle formation in the boundary layer. Activation-type nucleation mechanism was introduced to produce...
Gröhn, A., Suonmaa, V., Auvinen, Ari, Lehtinen, K.E.J., Jokiniemi, Jorma
Environmental Science and Technology Vol.43 Nr.16, 6269 - 6274
Aerosol dynamics simulations on the connection of sulphuric acid and new particle formation (2008)
Vuollekoski, H., Leppä, J., Riipinen, I., Korhonen, H., ...
We have performed a series of simulations with an aerosol dynamics box model to study the connection between new particle formation and sulphuric acid concentration. For nucleation either activation...
Makkonen, R., Asmi, A., Korhonen, H., Kokkola, H., Järvenoja, S., Räisänen, P., ...
The global aerosol-climate model ECHAM5-HAM was modified to improve the representation of new particle formation in the boundary layer. Activation-type nucleation mechanism was introduced to produce...
Laaksonen, A., Kulmala, M., Berndt, T., Stratmann, F., Mikkonen, S., Ruuskanen, A., ...
Atmospheric new particle formation is generally thought to occur due to homogeneous or ion-induced nucleation of sulphuric acid. We compare ambient nucleation rates with laboratory data from...
The role of VOC oxidation products in continental new particle formation (2008)
Laaksonen, A., Kulmala, M., O'Dowd, C. D., Joutsensaari, J., Vaattovaara, P., Mikkonen, S., ...
Aerosol physical and chemical properties and trace gas concentrations were measured during the QUEST field campaign in March?April 2003, in Hyytiälä, Finland. Our aim was to understand the role of...
SALSA ? a Sectional Aerosol module for Large Scale Applications (2008)
Kokkola, H., Korhonen, H., Lehtinen, K. E. J., Makkonen, R., Asmi, A., Järvenoja, S., ...
The sectional aerosol module SALSA is introduced. The model has been designed to be implemented in large scale climate models, which require both accuracy and computational efficiency. We have used...
Kokkola, H., Vesterinen, M., Anttila, T., Laaksonen, A., Lehtinen, K. E. J.
In this paper, we consider the cloud drop activation of aerosol particles consisting of water soluble material and an insoluble core. Based on the Köhler theory, we derive analytical equations for...
Aerosol dynamics simulations on the connection of sulphuric acid and new particle formation (2008)
Vuollekoski, H., Leppä, J., Riipinen, I., Korhonen, H., ...
We have performed a series of simulations with an aerosol dynamics box model to study the connection between new particle formation and sulphuric acid concentration. For nucleation either activation...
Makkonen, R., Asmi, A., Korhonen, H., Kokkola, H., Järvenoja, S., Räisänen, P., ...
The global aerosol-climate model ECHAM5-HAM was modified to improve the representation of new particle formation in the boundary layer. Activation-type nucleation mechanism was introduced to produce...
Laaksonen, A., Kulmala, M., Berndt, T., Stratmann, F., Mikkonen, S., Ruuskanen, A., ...
Atmospheric new particle formation is generally thought to occur due to homogeneous or ion-induced nucleation of sulphuric acid. We compare ambient nucleation rates with laboratory data from...
The role of VOC oxidation products in continental new particle formation (2008)
Laaksonen, A., Kulmala, M., O'Dowd, C. D., Joutsensaari, J., Vaattovaara, P., Mikkonen, S., ...
Aerosol physical and chemical properties and trace gas concentrations were measured during the QUEST field campaign in March?April 2003, in Hyytiälä, Finland. Our aim was to understand the role of...
SALSA ? a Sectional Aerosol module for Large Scale Applications (2008)
Kokkola, H., Korhonen, H., Lehtinen, K. E. J., Makkonen, R., Asmi, A., Järvenoja, S., ...
The sectional aerosol module SALSA is introduced. The model has been designed to be implemented in large scale climate models, which require both accuracy and computational efficiency. We have used...
Kokkola, H., Vesterinen, M., Anttila, T., Laaksonen, A., Lehtinen, K. E. J.
In this paper, we consider the cloud drop activation of aerosol particles consisting of water soluble material and an insoluble core. Based on the Köhler theory, we derive analytical equations for...
The role of VOC oxidation products in continental new particle formation (2008)
Laaksonen, A., Kulmala, M., O'Dowd, C. D., Joutsensaari, J., Vaattovaara, P., Mikkonen, S., ...
Riipinen, I., Kulmala, M., Arnold, Frank, Dal Maso, M., Birmili, W., ...
This study investigates the connections between atmospheric sulphuric acid and new particle formation during QUEST III and BACCI/QUEST IV campaigns. The campaigns have been conducted in Heidelberg...
Kokkola, H., Vesterinen, M., Anttila, T., Laaksonen, A., Lehtinen, K. E. J.
In this paper, we consider the cloud drop activation of aerosol particles consisting of water soluble material and an insoluble core. Based on the Köhler theory, we derive analytical equations for...
SALSA ? a Sectional Aerosol module for Large Scale Applications (2007)
Kokkola, H., Korhonen, H., Lehtinen, K. E. J., Makkonen, R., Asmi, A., Järvenoja, S., ...
The sectional aerosol module SALSA is introduced. The model has been designed to be implemented in large scale climate models, which require both accuracy and computational efficiency. We have used...
The role of VOC oxidation products in continental new particle formation (2007)
Laaksonen, A., Kulmala, M., O'Dowd, C. D., Joutsensaari, J., Vaattovaara, P., Mikkonen, S., ...
Aerosol physical and chemical properties and trace gas concentrations were measured during the QUEST field campaign in March?April, 2003, in Hyytiälä, Finland. Our aim was to understand the role of...
Arola, A., Lindfors, A., Natunen, A., Lehtinen, K. E. J.
In spring 2006, biomass burning aerosols from eastern Europe were transported extensively to Finland, and to other parts of northern Europe. They were observed as far as in the European Arctic. In...
Arola, A., Lindfors, A., Natunen, A., Lehtinen, K. E. J.
In spring 2006, biomass burning aerosols from eastern Europe were transported extensively to Finland, and to other parts of northern Europe. They were observed as far as in the European Arctic. In...
Riipinen, I., Kulmala, M., Arnold, F., Dal Maso, M., Birmili, W., ...
This study investigates the connections between atmospheric sulphuric acid and new particle formation during QUEST III and BACCI/QUEST IV campaigns. The campaigns have been conducted in Heidelberg...
Nucleation and growth of new particles in Po Valley, Italy (2007)
Hamed, A., Joutsensaari, J., Mikkonen, S., Sogacheva, L., Dal Maso, M., Kulmala, M., ...
Aerosol number distribution measurements are reported at San Pietro Capofiume (SPC) station (44°39' N, 11°37' E) for the time period 2002?2005. The station is located in Po Valley, the largest...
Kokkola, H., Vesterinen, M., Anttila, T., Laaksonen, A., Lehtinen, K. E. J.
In this paper, we consider the cloud drop activation of aerosol particles consisting of water soluble material and an insoluble core. Based on the Köhler theory, we derive analytical equations for...
SALSA ? a Sectional Aerosol module for Large Scale Applications (2007)
Kokkola, H., Korhonen, H., Lehtinen, K. E. J., Makkonen, R., Asmi, A., Järvenoja, S., ...
The sectional aerosol module SALSA is introduced. The model has been designed to be implemented in large scale climate models, which require both accuracy and computational efficiency. We have used...
The role of VOC oxidation products in continental new particle formation (2007)
Laaksonen, A., Kulmala, M., O'Dowd, C. D., Joutsensaari, J., Vaattovaara, P., Mikkonen, S., ...
Aerosol physical and chemical properties and trace gas concentrations were measured during the QUEST field campaign in March?April, 2003, in Hyytiälä, Finland. Our aim was to understand the role of...
Arola, A., Lindfors, A., Natunen, A., Lehtinen, K. E. J.
In spring 2006, biomass burning aerosols from eastern Europe were transported extensively to Finland, and to other parts of northern Europe. They were observed as far as in the European Arctic. In...
Arola, A., Lindfors, A., Natunen, A., Lehtinen, K. E. J.
In spring 2006, biomass burning aerosols from eastern Europe were transported extensively to Finland, and to other parts of northern Europe. They were observed as far as in the European Arctic. In...
Riipinen, I., Kulmala, M., Arnold, F., Dal Maso, M., Birmili, W., ...
This study investigates the connections between atmospheric sulphuric acid and new particle formation during QUEST III and BACCI/QUEST IV campaigns. The campaigns have been conducted in Heidelberg...
Nucleation and growth of new particles in Po Valley, Italy (2007)
Hamed, A., Joutsensaari, J., Mikkonen, S., Sogacheva, L., Dal Maso, M., Kulmala, M., ...
Aerosol number distribution measurements are reported at San Pietro Capofiume (SPC) station (44°39' N, 11°37' E) for the time period 2002?2005. The station is located in Po Valley, the largest...
Sihto, L.H., Kulmala, M., Kerminen, V.M., Dal Maso, M., Petäjä, T., Riipinen, I., ...
We have investigated the formation and early growth of atmospheric secondary aerosol particles building on atmospheric measurements. The measurements were part of the QUEST 2 campaign which took...
Riipinen, I., Kulmala, M., Arnold, F., Dal Maso, M., Birmili, W., ...
This study investigates the connections between atmospheric sulphuric acid and new particle formation during QUEST III and BACCI/QUEST IV campaigns. The campaigns have been conducted in Heidelberg...
Nucleation and growth of new particles in Po Valley, Italy (2006)
Hamed, A., Joutsensaari, J., Mikkonen, S., Sogacheva, L., Dal Maso, M., Kulmala, M., ...
Aerosol number distribution measurements are reported at San Pietro Capofiume (SPC) station (44°39' N, 11°37' E) for the time period 2002?2005. The station is located in Po Valley, the largest...
Using discriminant analysis as a nucleation event classification method (2006)
Mikkonen, S., Lehtinen, K. E. J., Hamed, A., Joutsensaari, J., Facchini, M. C., Laaksonen, A.
More than three years of measurements of aerosol size-distribution and different gas and meteorological parameters made in Po Valley, Italy were analysed for this study to examine which of the...
Kulmala, M., Dal Maso, M., Petäjä, T., Riipinen, I., ...
We have investigated the formation and early growth of atmospheric secondary aerosol particles building on atmospheric measurements. The measurements were part of the QUEST 2 campaign which took...
Vaattovaara, P., Huttunen, P. E., Yoon, Y. J., Joutsensaari, J., Lehtinen, K. E. J., O'Dowd, C. D., ...
Newly-formed nanometer-sized particles have been observed at coastal and marine environments worldwide. Interestingly, organic species have so far not been detected in those newly-formed nucleation...
On the hygroscopic growth of ammoniated sulfate particles of non-stoichiometric composition (2006)
Kokkola, H., Joutsensaari, J., Hyppönen, N., Lehtinen, K. E. J., Laaksonen, A.
The hygroscopic growth of ammoniated sulfate particles was studied by measurements and model calculations for particles with varying ammonium-to-sulfate ratio. In the measurements, the...
Using discriminant analysis as a nucleation event classification method (2006)
Mikkonen, S., Lehtinen, K. E. J., Hamed, A., Joutsensaari, J., Facchini, M. C., Laaksonen, A.
More than three years of measurements of aerosol size-distribution and different gas and meteorological parameters made in Po Valley, Italy were analysed for this study to examine which of the...
Vaattovaara, P., Huttunen, P. E., Yoon, Y. J., Joutsensaari, J., Lehtinen, K. E. J., O'Dowd, C. D., ...
Newly-formed nanometer-sized particles have been observed at coastal and marine environments world wide. Organic species have so far not been detected in those newly-formed nucleation mode particles....
Kulmala, M., Dal Maso, M., Petäjä, T., Riipinen, I., ...
We have investigated the formation and early growth of atmospheric secondary aerosol particles building on atmospheric measurements. The measurements were part of the QUEST 2 campaign which took...
The influence of nitric acid on the cloud processing of aerosol particles (2006)
Romakkaniemi, S., Kokkola, H., Lehtinen, K. E. J., Laaksonen, A.
In this paper we present simulations of the effect of nitric acid (HNO3) on cloud processing of aerosol particles. Sulfuric acid (H2SO4) production and incloud coagulation are both affected by...
Kulmala, M., Lehtinen, K. E. J., Laaksonen, A.
According to atmospheric observations new particle formation seems to be a function of sulphuric acid concentration to the power from one to two. The nucleation theorem then predicts that the...
Riipinen, I., Kulmala, M., Arnold, F., Dal Maso, M., Birmili, W., ...
This study investigates the connections between atmospheric sulphuric acid and new particle formation during QUEST III and BACCI/QUEST IV campaigns. The campaigns have been conducted in Heidelberg...
Nucleation and growth of new particles in Po Valley, Italy (2006)
Hamed, A., Joutsensaari, J., Mikkonen, S., Sogacheva, L., Dal Maso, M., Kulmala, M., ...
Aerosol number distribution measurements are reported at San Pietro Capofiume (SPC) station (44°39' N, 11°37' E) for the time period 2002?2005. The station is located in Po Valley, the largest...
Using discriminant analysis as a nucleation event classification method (2006)
Mikkonen, S., Lehtinen, K. E. J., Hamed, A., Joutsensaari, J., Facchini, M. C., Laaksonen, A.
More than three years of measurements of aerosol size-distribution and different gas and meteorological parameters made in Po Valley, Italy were analysed for this study to examine which of the...
Kulmala, M., Dal Maso, M., Petäjä, T., Riipinen, I., ...
We have investigated the formation and early growth of atmospheric secondary aerosol particles building on atmospheric measurements. The measurements were part of the QUEST 2 campaign which took...
Vaattovaara, P., Huttunen, P. E., Yoon, Y. J., Joutsensaari, J., Lehtinen, K. E. J., O'Dowd, C. D., ...
Newly-formed nanometer-sized particles have been observed at coastal and marine environments worldwide. Interestingly, organic species have so far not been detected in those newly-formed nucleation...
On the hygroscopic growth of ammoniated sulfate particles of non-stoichiometric composition (2006)
Kokkola, H., Joutsensaari, J., Hyppönen, N., Lehtinen, K. E. J., Laaksonen, A.
The hygroscopic growth of ammoniated sulfate particles was studied by measurements and model calculations for particles with varying ammonium-to-sulfate ratio. In the measurements, the...
Using discriminant analysis as a nucleation event classification method (2006)
Mikkonen, S., Lehtinen, K. E. J., Hamed, A., Joutsensaari, J., Facchini, M. C., Laaksonen, A.
More than three years of measurements of aerosol size-distribution and different gas and meteorological parameters made in Po Valley, Italy were analysed for this study to examine which of the...
Vaattovaara, P., Huttunen, P. E., Yoon, Y. J., Joutsensaari, J., Lehtinen, K. E. J., O'Dowd, C. D., ...
Newly-formed nanometer-sized particles have been observed at coastal and marine environments world wide. Organic species have so far not been detected in those newly-formed nucleation mode particles....
Kulmala, M., Dal Maso, M., Petäjä, T., Riipinen, I., ...
We have investigated the formation and early growth of atmospheric secondary aerosol particles building on atmospheric measurements. The measurements were part of the QUEST 2 campaign which took...
The influence of nitric acid on the cloud processing of aerosol particles (2006)
Romakkaniemi, S., Kokkola, H., Lehtinen, K. E. J., Laaksonen, A.
In this paper we present simulations of the effect of nitric acid (HNO3) on cloud processing of aerosol particles. Sulfuric acid (H2SO4) production and incloud coagulation are both affected by...
Kulmala, M., Lehtinen, K. E. J., Laaksonen, A.
According to atmospheric observations new particle formation seems to be a function of sulphuric acid concentration to the power from one to two. The nucleation theorem then predicts that the...
Why formation rate of 3 nm particles depends linearly on sulphuric acid concentration? (2005)
Kulmala, M., Lehtinen, K. E. J., Laaksonen, A.
According to atmospheric observations new particle formation seems to be a function of sulphuric acid concentration to the power from one to two. The nucleation theorem then predicts that the...
The influence of nitric acid on the cloud processing of aerosol particles (2005)
Romakkaniemi, S., Kokkola, H., Lehtinen, K. E. J., Laaksonen, A.
In this paper we present simulations of the effect of nitric acid (HNO3) on cloud processing of aerosol particles. Sulfuric acid (H2SO4) production and incloud coagulation are both affected by...
Korhonen, H., Lehtinen, K. E. J., Kulmala, M.
We investigate the influence of low size resolution, typical to sectional aerosol models in large scale applications, on cloud droplet activation and cloud processing of aerosol particles. A...
CCN activation and cloud processing in sectional aerosol models with low size resolution (2005)
Korhonen, H., Lehtinen, K. E. J., Kulmala, M.
We investigate the influence of low size resolution, typical to sectional aerosol models in large scale applications, on cloud droplet activation and cloud processing of aerosol particles. A...
Kulmala, M., Petäjä, T., Mönkkönen, P., Koponen, I. K., Dal Maso, M., Aalto, P. P., ...
The growth properties of nucleation mode particles were investigated. The variation of source rates of condensable vapors in different locations and environmental conditions was analyzed. The...
Mönkkönen, P., Koponen, I. K., Lehtinen, K. E. J., Hämeri, K., Uma, R., Kulmala, M.
Diurnal variation of number size distribution (particle size 3-800nm) and modal parameters (geometric standard deviation, geometric mean diameter and modal aerosol particle concentration) in a highly...
Why formation rate of 3 nm particles depends linearly on sulphuric acid concentration? (2005)
Kulmala, M., Lehtinen, K. E. J., Laaksonen, A.
According to atmospheric observations new particle formation seems to be a function of sulphuric acid concentration to the power from one to two. The nucleation theorem then predicts that the...
The influence of nitric acid on the cloud processing of aerosol particles (2005)
Romakkaniemi, S., Kokkola, H., Lehtinen, K. E. J., Laaksonen, A.
In this paper we present simulations of the effect of nitric acid (HNO3) on cloud processing of aerosol particles. Sulfuric acid (H2SO4) production and incloud coagulation are both affected by...
Korhonen, H., Lehtinen, K. E. J., Kulmala, M.
We investigate the influence of low size resolution, typical to sectional aerosol models in large scale applications, on cloud droplet activation and cloud processing of aerosol particles. A...
CCN activation and cloud processing in sectional aerosol models with low size resolution (2005)
Korhonen, H., Lehtinen, K. E. J., Kulmala, M.
We investigate the influence of low size resolution, typical to sectional aerosol models in large scale applications, on cloud droplet activation and cloud processing of aerosol particles. A...
Kulmala, M., Petäjä, T., Mönkkönen, P., Koponen, I. K., Dal Maso, M., Aalto, P. P., ...
The growth properties of nucleation mode particles were investigated. The variation of source rates of condensable vapors in different locations and environmental conditions was analyzed. The...
Mönkkönen, P., Koponen, I. K., Lehtinen, K. E. J., Hämeri, K., Uma, R., Kulmala, M.
Diurnal variation of number size distribution (particle size 3-800nm) and modal parameters (geometric standard deviation, geometric mean diameter and modal aerosol particle concentration) in a highly...
Tunved, P., Korhonen, H., Ström, J., Lehtinen, K. E. J., Kulmala, M.
The evolution of the aerosol size distribution during transport between Aspvreten (58.8° N, 17.4° E) and Värriö (67.46° N, 29.35° E) was studied using a pseudo-Lagrangian approach. Aerosol...
Kulmala, M., Petäjä, T., Mönkkönen, P., Koponen, I. K., Dal Maso, M., Aalto, P. P., ...
The growth properties of nucleation mode particles were investigated. The variation of source rates of condensable vapors in different locations and environmental conditions was analyzed. The...
Initial steps of aerosol growth (2004)
Kulmala, O., Laakso, L., Lehtinen, K. E. J., Riipinen, I., Dal Maso, M., Anttila, T., ...
The formation and growth of atmospheric aerosols depend on several steps, namely nucleation, initial steps of growth and subsequent ? mainly condensational ? growth. This work focuses on the initial...
Mönkkönen, P., Koponen, I. K., Lehtinen, K. E. J., Hämeri, K., Uma, R., Kulmala, M.
Diurnal variation of number size distribution (particle size 3?800 nm) and modal parameters (geometric standard deviation, geometric mean diameter and modal aerosol particle concentration) in a...
Ion production rate in a boreal forest based on ion, particle and radiation measurements (2004)
Laakso, L., Petäjä, T., Lehtinen, K. E. J., Kulmala, M., Paatero, J., Hõrrak, U., ...
In this study the ion production rates in a boreal forest are studied based on two different methods: 1) cluster ion and particle concentration measurements, 2) external radiation and radon...
Kinetic nucleation and ions in boreal particle formation events (2004)
Laakso, L., Anttila, T., Lehtinen, K. E. J., Aalto, P. P., Kulmala, M., Hõrrak, U., ...
In order to gain a more comprehensive picture on different mechanisms behind atmospheric particle formation, measurement results from QUEST 2-campaign are analyzed with an aid of an aerosol dynamic...
Vehkamäki, H., Dal Maso, M., Hussein, T., Flanagan, R., Hyvärinen, A., Lauros, J., ...
We have identified 147 clear 8 nm diameter particle formation events at the SMEAR I station in Värriö, northern Finland during calendar years 1998?2002. The events have been classified in detail...
Multicomponent aerosol dynamics model UHMA: model development and validation (2004)
Korhonen, H., Lehtinen, K. E. J., Kulmala, M.
A size-segregated aerosol dynamics model UHMA (University of Helsinki Multicomponent Aerosol model) was developed for studies of multicomponent tropospheric aerosol particles. The model includes...
Initial steps of aerosol growth (2004)
Kulmala, M., Laakso, L., Lehtinen, K. E. J., Riipinen, I., Dal Maso, M., Anttila, T., ...
The formation and growth of atmospheric aerosols depend on several steps, namely nucleation, initial steps of growth and subsequent ? mainly condensational ? growth. This work focuses on the initial...
Kinetic nucleation and ions in boreal forest particle formation events (2004)
Laakso, L., Anttila, T., Lehtinen, K. E. J., Aalto, P. P., Kulmala, M., Hõrrak, U., ...
In order to gain a more comprehensive picture on different mechanisms behind atmospheric particle formation, measurement results from QUEST 2-campaign are analyzed with an aid of an aerosol dynamic...
Vehkamäki, H., Dal Maso, M., Hussein, T., Flanagan, R., Hyvärinen, A., Lauros, J., ...
During the calendar years 1998-2002, 147 clear 8nm diameter particle formation events have been identified at the SMEAR I station in Värriö, northern Finland. The events have been classified in...
Ion production rate in a boreal forest based on ion, particle and radiation measurements (2004)
Laakso, L., Petäjä, T., Lehtinen, K. E. J., Kulmala, M., Paatero, J., Hõrrak, U., ...
In this study the ion production rates in a boreal forest were studied based on two different methods: 1) cluster ion and particle concentration measurements, 2) external radiation and radon...
Multicomponent aerosol dynamics model UHMA: model development and validation (2004)
Korhonen, H., Lehtinen, K. E. J., Kulmala, M.
A size-segregated aerosol dynamics model UHMA (University of Helsinki Multicomponent Aerosol model) was developed for studies of multicomponent tropospheric aerosol particles. The model includes...
A new feedback mechanism linking forests, aerosols, and climate (2004)
Kulmala, M., Suni, T., Lehtinen, K. E. J., Dal Maso, M., Boy, M., Reissell, A., ...
The possible connections between the carbon balance of ecosystems and aerosol-cloud-climate interactions play a significant role in climate change studies. Carbon dioxide is a greenhouse gas, whereas...
Tunved, P., Korhonen, H., Ström, J., Lehtinen, K. E. J., Kulmala, M.
The evolution of the aerosol size distribution during transport between Aspvreten (58.8° N, 17.4° E) and Värriö (67.46° N, 29.35° E) was studied using a pseudo-Lagrangian approach. Aerosol...
Kulmala, M., Petäjä, T., Mönkkönen, P., Koponen, I. K., Dal Maso, M., Aalto, P. P., ...
The growth properties of nucleation mode particles were investigated. The variation of source rates of condensable vapors in different locations and environmental conditions was analyzed. The...
Initial steps of aerosol growth (2004)
Kulmala, O., Laakso, L., Lehtinen, K. E. J., Riipinen, I., Dal Maso, M., Anttila, T., ...
The formation and growth of atmospheric aerosols depend on several steps, namely nucleation, initial steps of growth and subsequent ? mainly condensational ? growth. This work focuses on the initial...
Mönkkönen, P., Koponen, I. K., Lehtinen, K. E. J., Hämeri, K., Uma, R., Kulmala, M.
Diurnal variation of number size distribution (particle size 3?800 nm) and modal parameters (geometric standard deviation, geometric mean diameter and modal aerosol particle concentration) in a...
Ion production rate in a boreal forest based on ion, particle and radiation measurements (2004)
Laakso, L., Petäjä, T., Lehtinen, K. E. J., Kulmala, M., Paatero, J., Hõrrak, U., ...
In this study the ion production rates in a boreal forest are studied based on two different methods: 1) cluster ion and particle concentration measurements, 2) external radiation and radon...
Kinetic nucleation and ions in boreal particle formation events (2004)
Laakso, L., Anttila, T., Lehtinen, K. E. J., Aalto, P. P., Kulmala, M., Hõrrak, U., ...
In order to gain a more comprehensive picture on different mechanisms behind atmospheric particle formation, measurement results from QUEST 2-campaign are analyzed with an aid of an aerosol dynamic...
Vehkamäki, H., Dal Maso, M., Hussein, T., Flanagan, R., Hyvärinen, A., Lauros, J., ...
We have identified 147 clear 8 nm diameter particle formation events at the SMEAR I station in Värriö, northern Finland during calendar years 1998?2002. The events have been classified in detail...
Multicomponent aerosol dynamics model UHMA: model development and validation (2004)
Korhonen, H., Lehtinen, K. E. J., Kulmala, M.
A size-segregated aerosol dynamics model UHMA (University of Helsinki Multicomponent Aerosol model) was developed for studies of multicomponent tropospheric aerosol particles. The model includes...
Initial steps of aerosol growth (2004)
Kulmala, M., Laakso, L., Lehtinen, K. E. J., Riipinen, I., Dal Maso, M., Anttila, T., ...
The formation and growth of atmospheric aerosols depend on several steps, namely nucleation, initial steps of growth and subsequent ? mainly condensational ? growth. This work focuses on the initial...
Kinetic nucleation and ions in boreal forest particle formation events (2004)
Laakso, L., Anttila, T., Lehtinen, K. E. J., Aalto, P. P., Kulmala, M., Hõrrak, U., ...
In order to gain a more comprehensive picture on different mechanisms behind atmospheric particle formation, measurement results from QUEST 2-campaign are analyzed with an aid of an aerosol dynamic...
Vehkamäki, H., Dal Maso, M., Hussein, T., Flanagan, R., Hyvärinen, A., Lauros, J., ...
During the calendar years 1998-2002, 147 clear 8nm diameter particle formation events have been identified at the SMEAR I station in Värriö, northern Finland. The events have been classified in...
Ion production rate in a boreal forest based on ion, particle and radiation measurements (2004)
Laakso, L., Petäjä, T., Lehtinen, K. E. J., Kulmala, M., Paatero, J., Hõrrak, U., ...
In this study the ion production rates in a boreal forest were studied based on two different methods: 1) cluster ion and particle concentration measurements, 2) external radiation and radon...
Multicomponent aerosol dynamics model UHMA: model development and validation (2004)
Korhonen, H., Lehtinen, K. E. J., Kulmala, M.
A size-segregated aerosol dynamics model UHMA (University of Helsinki Multicomponent Aerosol model) was developed for studies of multicomponent tropospheric aerosol particles. The model includes...
A new feedback mechanism linking forests, aerosols, and climate (2004)
Kulmala, M., Suni, T., Lehtinen, K. E. J., Dal Maso, M., Boy, M., Reissell, A., ...
The possible connections between the carbon balance of ecosystems and aerosol-cloud-climate interactions play a significant role in climate change studies. Carbon dioxide is a greenhouse gas, whereas...
Korhonen,H., Napari,I., Timmreck,Claudia, Vehkamaki,H., Pirjola,L., Lehtinen,K. E. J., ...
The plausibility of heterogeneous conucleation of water, sulphuric acid, and ammonia as a pathway leading to soluble coating of atmospheric mineral dust is investigated. In addition, the effect of...
Korhonen, H., Napari, I., Timmreck, Claudia, Vehkamaki, H., Pirjola, L., Lehtinen, K. E. J., ...
The plausibility of heterogeneous conucleation of water, sulphuric acid, and ammonia as a pathway leading to soluble coating of atmospheric mineral dust is investigated. In addition, the effect of...
A new feedback mechanism linking forests, aerosols, and climate (2003)
Kulmala, M., Suni, T., Lehtinen, K. E. J., Dal Maso, M., Boy, M., Reissell, A., ...
Among significant issues in climate change studies are the possible connections between the carbon balance of ecosystems and aerosol-cloud-climate interactions. Carbon dioxide is a greenhouse gas,...
A model for particle formation and growth in the atmosphere with molecular resolution in size (2003)
Lehtinen, K. E. J., Kulmala, M.
The formation and growth of atmospheric aerosol particles is considered using an exact discrete method with molecular resolution in size space. The method is immune to numerical diffusion problems...
A new feedback mechanism linking forests, aerosols, and climate (2003)
Kulmala, M., Suni, T., Lehtinen, K. E. J., Dal Maso, M., Boy, M., Reissell, A., ...
Among significant issues in climate change studies are the possible connections between the carbon balance of ecosystems and aerosol-cloud-climate interactions. Carbon dioxide is a greenhouse gas,...
A model for particle formation and growth in the atmosphere with molecular resolution in size (2003)
Lehtinen, K. E. J., Kulmala, M.
The formation and growth of atmospheric aerosol particles is considered using an exact discrete method with molecular resolution in size space. The method is immune to numerical diffusion problems...
Vehkamaki,H., Kulmala,M., Napari,I., Lehtinen,K. E. J., Timmreck,C., Noppel,M., ...
In this paper we present parameterized equations for calculation of sulfuric acid-water critical nucleus compositions, critical cluster radii and homogeneous nucleation rates for tropospheric and...
Vehkamaki, H., Kulmala, M., Napari, I., Lehtinen, K. E. J., Timmreck, C., Noppel, M., ...
In this paper we present parameterized equations for calculation of sulfuric acid-water critical nucleus compositions, critical cluster radii and homogeneous nucleation rates for tropospheric and...
A model for particle formation and growth in the atmosphere with molecular resolution in size (2002)
Lehtinen, K. E. J., Kulmala, M.
The formation and growth of atmospheric aerosol particles is considered using an exact discrete method with molecular resolution in size space. The method is immune to numerical diffusion problems...
A model for particle formation and growth in the atmosphere with molecular resolution in size (2002)
Lehtinen, K. E. J., Kulmala, M.
The formation and growth of atmospheric aerosol particles is considered using an exact discrete method with molecular resolution in size space. The method is immune to numerical diffusion problems...