Vida, K., Oláh, K., Kővári, Zs., Korhonen, H., Bartus, J., Hurta, Zs., ...
We investigate the fast-rotating (P_orb=P_rot=0.465d), active dwarf binary V405 And (M0V+M5V) using photometric BV(RI)_C and optical spectroscopic data. The light variation is caused by the combined...
Multiple and changing cycles of active stars II. Results (2009)
Oláh, K., Kolláth, Z., Granzer, T., Strassmeier, K. G., Lanza, A. F., Järvinen, S., ...
We study the time variations of the cycles of 20 active stars based on decades-long photometric or spectroscopic observations. A method of time-frequency analysis, as discussed in a companion paper,...
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...
R. Makkonen, A. Asmi, H. Korhonen, H. Kokkola, S. Järvenoja, P. Räisänen, ...
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...
Aerosol dynamics simulations on the connection of sulphuric acid and new particle formation (2009)
H. Vuollekoski, J. Leppä, I. Riipinen, H. Korhonen, ...
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...
Differential rotation plays a crucial role in the alpha-omega dynamo, and thus also in creation of magnetic fields in stars with convective outer envelopes. Still, measuring the radial differential...
Korhonen, H., Hubrig, S., Berdyugina, S. V., Granzer, Th., Hackman, T., Schoeller, M., ...
In this study we present simultaneous low-resolution longitudinal magnetic field measurements and high-resolution spectroscopic observations of the cool single giant FK Com. The variation of the...
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...
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...
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...
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...
To swim or not to swim: An interpretation of farmed mink’s motivation for a water bath (2008)
Vinke, C.M., Hansen, S.W., Mononen, J., Korhonen, H., Cooper, J.J., Mohaibes, M., ...
How an animal's behavioural needs can be met is a pivotal issue in the assessment of welfare for captive animals. The value of swimming water for farmed mink is an example of how scientific and...
SALSA ─ a Sectional Aerosol module for Large Scale Applications (2008)
H. Kokkola, H. Korhonen, R. Makkonen, A. Asmi, S. Järvenoja, ...
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...
R. Makkonen, A. Asmi, H. Korhonen, H. Kokkola, S. Järvenoja, P. Räisänen, ...
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...
Aerosol dynamics simulations on the connection of sulphuric acid and new particle formation (2008)
H. Vuollekoski, J. Leppä, I. Riipinen, H. Korhonen, ...
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...
An optical time-delay estimate for the double gravitational lens system B1600+434 1 (2007)
I. Burud, J. Hjorth, A. O. Jaunsen, M. I. Andersen, H. Korhonen, J. W. Clasen, ...
and R. stensen Department of Physics
ASTRONOMY AND ASTROPHYSICS (2007)
H. Korhonen, S. V. Berdyugina, T. Hackman, R. Duemmler, I. Tuominen
inversion methods, Tikhonov regularization and the Occamian approach, are used to check the dependence on the formal assumptions. The images are found to be very similar when the same local line...
ASTRONOMY AND ASTROPHYSICS (2007)
H. Korhonen, S. V. Berdyugina, T. Hackman, K. G. Strassmeier, I. Tuominen
Abstract. We present new surface (Doppler) images of the latetype single giant FKCom for June-July 1996, July-August 1996, April 1997 and June 1997. These images are compared with the previously...
Surface imaging of FK Comae Berenices (2007)
H. Korhonen, S. V. Berdyugina, R. Duemmler, T. Hackman, I. V. Ilyin, I. Tuominen
Abstract. We present surface maps for the single, late-type giant FK Com, for the years 1994 and 1995. The maps are derived from high-resolution spectroscopic observations obtained at NOT with the...
Spot evolution in FK Com (2007)
H. Korhonen, S. V. Berdyugina, I. Tuominen, T. Hackman
We present new surface images of the late-type single giant FK Com for the years 1996 and 1997. These images are compared with the previously obtained images from 1994 and 1995. Maps from consecutive...
Spectroscopic monitoring of FK Com (2007)
Abstract. The single, late-type giant FK Com has been observed at the NOT with the SOFIN high-resolution spectrograph. The observations have been carried out starting in the summer of 1993 and have...
An optical time-delay estimate for the double gravitational lens system B1600+434 (2007)
I. Burud, J. Hjorth, A. O. Jaunsen, M. I. Andersen, H. Korhonen, J. W. Clasen, ...
We present optical I-band light curves of the gravitationally lensed double QSO B1600+434 from observations obtained at the Nordic Optical Telescope (NOT) between April 1998 and November 1999. The...
H. Korhonen, S. V. Berdyugina, I. Tuominen, M. I. Andersen, J. Piironen, K. G. Strassmeier, ...
III. Photometry for the years 1993-2001
H. Korhonen, S. V. Berdyugina, I. Tuominen
Abstract. Surface (Doppler) imaging techniques have earlier been used to study the spot conguration and evolution over a three year period in a single, late-type star, FK Com. In the present work we...
Photospheric and chromospheric activity on EY Dra (2007)
Korhonen, H., Brogaard, K., Holhjem, K., Ramstedt, S., Rantala, J., Thoene, C. C., ...
Magnetic activity in the photosphere and chromosphere of the M dwarf EY Dra is studied and possible correlations between the two are investigated using photometric observations in the V and R bands...
Hussein, T., Kukkonen, J., Korhonen, H., Pohjola, M., Pirjola, L., Wraith, Darren, ...
This study presents an evaluation and modeling exercise of the size fractionated aerosol particle number concentrations measured nearby a major road in Helsinki during 23 August–19 September 2003...
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...
Hussein, T., Kukkonen, J., Korhonen, H., Pohjola, M., Pirjola, L., Wraith, D., ...
This study presents an evaluation and modeling of the size fractionated aerosol number concentrations that were measured near a major road of Itäväylä in Helsinki, during 23 August ? 19 September...
Bonn, B., Korhonen, H., Petäjä, T., Boy, M., Kulmala, M.
This study focusses on the description of the nucleation process observed during the ozone reaction of the biogenic monoterpene ?-pinene in smog chambers. Therefore, a detailed aerosol dynamics model...
Hussein, T., Kukkonen, J., Korhonen, H., Pohjola, M., Pirjola, L., Wraith, D., ...
This study presents an evaluation and modeling exercise of the size fractionated aerosol particle number concentrations measured nearby a major road in Helsinki during 23 August?19 September 2003 and...
Pohjola, M. A., Pirjola, L., Karppinen, A., Härkönen, J., Korhonen, H., Hussein, T., ...
A field measurement campaign was conducted near a major road "Itäväylä" in an urban area in Helsinki in 17?20 February 2003. Aerosol measurements were conducted using a mobile laboratory "Sniffer"...
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...
Hussein, T., Kukkonen, J., Korhonen, H., Pohjola, M., Pirjola, L., Wraith, D., ...
This study presents an evaluation and modeling of the size fractionated aerosol number concentrations that were measured near a major road of Itäväylä in Helsinki, during 23 August ? 19 September...
Bonn, B., Korhonen, H., Petäjä, T., Boy, M., Kulmala, M.
This study focusses on the description of the nucleation process observed during the ozone reaction of the biogenic monoterpene ?-pinene in smog chambers. Therefore, a detailed aerosol dynamics model...
Hussein, T., Kukkonen, J., Korhonen, H., Pohjola, M., Pirjola, L., Wraith, D., ...
This study presents an evaluation and modeling exercise of the size fractionated aerosol particle number concentrations measured nearby a major road in Helsinki during 23 August?19 September 2003 and...
Pohjola, M. A., Pirjola, L., Karppinen, A., Härkönen, J., Korhonen, H., Hussein, T., ...
A field measurement campaign was conducted near a major road "Itäväylä" in an urban area in Helsinki in 17?20 February 2003. Aerosol measurements were conducted using a mobile laboratory "Sniffer"...
Hussein, T., Kukkonen, J., Korhonen, H., Pohjola, M., Pirjola, L., Wraith, Darren, ...
This study presents an evaluation and modeling exercise of the size fractionated aerosol particle number concentrations measured nearby a major road in Helsinki during 23 August–19 September 2003...
Hussein, T., Kukkonen, J., Korhonen, H., Pohjola, M., Pirjola, L., Wraith, Darren, ...
This study presents an evaluation and modeling exercise of the size fractionated aerosol particle number concentrations measured nearby a major road in Helsinki during 23 August–19 September 2003...
Hussein, T., Kukkonen, J., Korhonen, H., Pohjola, M., Pirjola, L., Wraith, Darren, ...
This study presents an evaluation and modeling exercise of the size fractionated aerosol particle number concentrations measured nearby a major road in Helsinki during 23 August–19 September 2003...
Hussein, T., Kukkonen, J., Korhonen, H., Pohjola, M., Pirjola, L., Wraith, Darren, ...
This study presents an evaluation and modeling exercise of the size fractionated aerosol particle number concentrations measured nearby a major road in Helsinki during 23 August–19 September 2003...
Hussein, T., Kukkonen, J., Korhonen, H., Pohjola, M., Pirjola, L., Wraith, Darren, ...
This study presents an evaluation and modeling exercise of the size fractionated aerosol particle number concentrations measured nearby a major road in Helsinki during 23 August-19 September 2003 and...
M. A. Pohjola, L. Pirjola, A. Karppinen, J. Härkönen, H. Korhonen, T. Hussein, ...
A field measurement campaign was conducted near a major road "Itäväylä" in an urban area in Helsinki in 17–20 February 2003. Aerosol measurements were conducted using a mobile laboratory...
T. Hussein, J. Kukkonen, H. Korhonen, M. Pohjola, L. Pirjola, D. Wraith, ...
This study presents an evaluation and modeling exercise of the size fractionated aerosol particle number concentrations measured nearby a major road in Helsinki during 23 August–19 September...
B. Bonn, H. Korhonen, T. Petäjä, M. Boy, M. Kulmala
This study focusses on the description of the nucleation process observed during the ozone reaction of the biogenic monoterpene α-pinene in smog chambers. Therefore, a detailed aerosol dynamics...
T. Hussein, J. Kukkonen, H. Korhonen, M. Pohjola, L. Pirjola, D. Wraith, ...
This study presents an evaluation and modeling of the size fractionated aerosol number concentrations that were measured near a major road of Itäväylä in Helsinki, during 23 August – 19...
SALSA – a Sectional Aerosol module for Large Scale Applications (2007)
H. Kokkola, H. Korhonen, R. Makkonen, A. Asmi, S. Järvenoja, ...
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...
Hussein, T., Kukkonen, J., Korhonen, H., Pohjola, M., Pirjola, L., Wraith, Darren, ...
This study presents an evaluation and modeling exercise of the size fractionated aerosol particle number concentrations measured nearby a major road in Helsinki during 23 August–19 September 2003...
Hussein, T., Kukkonen, J., Korhonen, H., Pohjola, M., Pirjola, L., Wraith, Darren, ...
This study presents an evaluation and modeling exercise of the size fractionated aerosol particle number concentrations measured nearby a major road in Helsinki during 23 August–19 September 2003...
M. Komppula, H. Korhonen, H. Lihavainen, M. Kulmala, ...
This study covers four years of aerosol number size distribution data from Pallas and Värriö sites 250 km apart from each other in Northern Finland and compares new particle formation events...
M. Kulmala, M. Dal Maso, T. Petäjä, I. Riipinen, ...
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...
MALTE – model to predict new aerosol formation in the lower troposphere (2006)
M. Boy, O. Hellmuth, H. Korhonen, E. D. Nilsson, D. ReVelle, A. Turnipseed, ...
The manuscript presents a detailed description of the meteorological and chemical code of Malte – a model to predict new aerosol formation in the lower troposphere. The aerosol dynamics are...
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...
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...
MALTE ? Model to predict new aerosol formation in the lower troposphere (2006)
Boy, M., Hellmuth, O., Korhonen, H., Nilsson, E. D., Revelle, D., Turnipseed, A., ...
The manuscript presents a detailed description of the meteorological and chemical code of Malte ? a model to predict new aerosol formation in the lower troposphere. The aerosol dynamics are achieved...
MALTE ? model to predict new aerosol formation in the lower troposphere (2006)
Boy, M., Hellmuth, O., Korhonen, H., Nilsson, E. D., Revelle, D., Turnipseed, A., ...
The manuscript presents a detailed description of the meteorological and chemical code of Malte ? a model to predict new aerosol formation in the lower troposphere. The aerosol dynamics are achieved...
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...
Komppula, M., Korhonen, H., Lihavainen, H., Kulmala, M., ...
This study covers four years of aerosol number size distribution data from Pallas and Värriö sites 250 km apart from each other in Northern Finland and compares new particle formation events...
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...
MALTE ? Model to predict new aerosol formation in the lower troposphere (2006)
Boy, M., Hellmuth, O., Korhonen, H., Nilsson, E. D., Revelle, D., Turnipseed, A., ...
The manuscript presents a detailed description of the meteorological and chemical code of Malte ? a model to predict new aerosol formation in the lower troposphere. The aerosol dynamics are achieved...
MALTE ? model to predict new aerosol formation in the lower troposphere (2006)
Boy, M., Hellmuth, O., Korhonen, H., Nilsson, E. D., Revelle, D., Turnipseed, A., ...
The manuscript presents a detailed description of the meteorological and chemical code of Malte ? a model to predict new aerosol formation in the lower troposphere. The aerosol dynamics are achieved...
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...
Komppula, M., Korhonen, H., Lihavainen, H., Kulmala, M., ...
This study covers four years of aerosol number size distribution data from Pallas and Värriö sites 250 km apart from each other in Northern Finland and compares new particle formation events...
MALTE – Model to predict new aerosol formation in the lower troposphere (2006)
M. Boy, O. Hellmuth, H. Korhonen, E. D. Nilsson, D. ReVelle, A. Turnipseed, ...
The manuscript presents a detailed description of the meteorological and chemical code of Malte – a model to predict new aerosol formation in the lower troposphere. The aerosol dynamics are...
M. Kulmala, M. Dal Maso, T. Petäjä, I. Riipinen, ...
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...
MALTE – Model to predict new aerosol formation in the lower troposphere (2006)
M. Boy, O. Hellmuth, H. Korhonen, E. D. Nilsson, D. ReVelle, A. Turnipseed, ...
The manuscript presents a detailed description of the meteorological and chemical code of Malte – a model to predict new aerosol formation in the lower troposphere. The aerosol dynamics are...
Photometric observations from theoretical flip-flop models (2005)
Some active stars show a so-called flip-flop phenomenon in which the main spot activity periodically switches between two active longitudes that are 180 degrees apart. In this paper we study the...
Flip-flop phenomenon: observations and theory (2005)
In many active stars the spots concentrate on two permanent active longitudes which are 180 degrees apart. In some of these stars the dominant part of the spot activity changes the longitude every...
CCN activation and cloud processing in sectional aerosol models with low size resolution (2005)
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...
Komppula, M., Korhonen, H., Lihavainen, H., Kulmala, M., ...
This study covers four years of aerosol number size distribution data from Pallas and Värriö sites 250 km apart from each other in Northern Finland and compares new particle formation events...
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...
Komppula, M., Korhonen, H., Lihavainen, H., Kulmala, M., ...
This study covers four years of aerosol number size distribution data from Pallas and Värriö sites 250 km apart from each other in Northern Finland and compares new particle formation events...
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...
M. Komppula, H. Korhonen, H. Lihavainen, M. Kulmala, ...
This study covers four years of aerosol number size distribution data from Pallas and Värriö sites 250 km apart from each other in Northern Finland and compares new particle formation...
Multicomponent aerosol dynamics model UHMA: model development and validation (2004)
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...
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...
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...
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...
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...
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...
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...
Multicomponent aerosol dynamics model UHMA: model development and validation (2004)
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...
P. Tunved, H. Korhonen, J. Ström, M. Kulmala
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...
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...
Surface imaging of stellar non-radial pulsations. II. The beta Cephei star omega(1) Sco (2003)
Berdyugina, S.V., Telting, J.H., Korhonen, H., Schrijvers, C.
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...
Spectral Properties and Source Areas of Storm Microseisms at NORSAR, (2002)
Spectral estimates from eight microseismic storms recorded by long period vertical component seismometers at NORSAR exhibit distinct spectral peaks in the bands 50-85 mHz and 110-195 mHz. A high...
The first close-up of the "flip-flop" phenomenon in a single star (2001)
Korhonen, H., Berdyugina, S. V., Strassmeier, K. G., Tuominen, I.
We present temperature maps of the active late-type giant FK Com which exhibit the first imagining record of the ``flip-flop'' phenomenon in a single star. The phenomenon, in which the main part of...
The jet and circumburst stellar wind of GRB 980519 (2000)
Jaunsen, A. O., Hjorth, J., Bjornsson, G., Andersen, M. I., Pedersen, H., Kjernsmo, K., ...
We present extensive multi-colour (UBVR_CI_C) photometry of the optical afterglow of GRB 980519. Upon discovery, 8.3 hours after the burst, the source was decaying as a power law, (t-t_GRB)^alpha,...
An optical time-delay estimate for the double gravitational lens system B1600+434 (2000)
Burud, I., Hjorth, J., Jaunsen, A. O., Andersen, M. I., Korhonen, H., Clasen, J. W., ...
We present optical I-band light curves of the gravitationally lensed double QSO B1600+434 from observations obtained at the Nordic Optical Telescope (NOT) between April 1998 and November 1999. The...
Study of FK Comae Berenices. II. Spot evolution from 1994 to 1997 (2000)
Korhonen, H., Berdyugina, S. V., Hackman, T., Strassmeier, K. G., Tuominen, I.
We present new surface (Doppler) images of the late-type single giant FK Com for June-July 1996, July-August 1996, April 1997 and June 1997. These images are compared with the previously published...
The optical/IR counterpart of the 3 July 1998 gamma-ray burst and its evolution (1998)
Castro-Tirado, A. J., Zapatero-Osorio, M. R., Gorosabel, J., Greiner, J., Heidt, J., Herranz, D., ...
We imaged the X-ray error box of GRB 980703, beginning 22.5 hours after the gamma--ray event, in both the optical R and near-infrared H bands. A fading optical/IR object was detected within the X-ray...
Dobson, A, Filipiak, B, Kuulasmaa, K, Beaglehole, R, Stewart, A, Hobbs, M, ...
One of the main hypotheses of the World Health Organization (WHO) MONICA Project is that trends in the major coronary disease risk factors are related to trends in rates of fatal and non-fatal...
Dobson, A, Filipiak, B, Kuulasmaa, K, Beaglehole, R, Stewart, A, Hobbs, M, ...
One of the main hypotheses of the World Health Organization (WHO) MONICA Project is that trends in the major coronary disease risk factors are related to trends in rates of fatal and non-fatal...
Puska, P, Salonen, J T, Nissinen, A, Tuomilehto, J, Vartiainen, E, Korhonen, H, ...
A comprehensive community based programme to control cardiovascular diseases was started in North Karelia, Finland, in 1972. Reductions in smoking, serum cholesterol concentrations, and blood...
Puska, P, Salonen, J T, Nissinen, A, Tuomilehto, J, Vartiainen, E, Korhonen, H, ...
A comprehensive community based programme to control cardiovascular diseases was started in North Karelia, Finland, in 1972. Reductions in smoking, serum cholesterol concentrations, and blood...
International Quit and Win 1996: comparative evaluation study in China and Finland
Sun, S., Korhonen, T., Uutela, A., Korhonen, H., Puska, P., Jun, Y., ...
OBJECTIVES—To compare background and process variables, as well as follow up status, of the participants in the International Quit and Win '96 contests of China and Finland, and analyse factors...
Korhonen, T., Urjanheimo, E., Mannonen, P., Korhonen, H., Uutela, A., Puska, P.
OBJECTIVE—To evaluate Quit and Win campaigns repeated in North Karelia and rest of Finland. DESIGN—Repeated comparisons of participation rates, abstinence rates, and other measures between...