SMEAR II Hyytiälä 23 m
(Contact persons:Ivan Mammarella, Timo Vesala)
EC fluxes are measured at SMEAR II field measurement station (Hyytiälä, southern Finland). The micrometeorological measurement mast (127 m high) is located within an extended forest canopy (average tree height: 18 m).
Turbulent fluxes of momentum, sensible and latent heat, carbon dioxide and aerosol particles are measured since 1996.
EC system is mounted at 23.3 m above the ground, and it includes the
three dimensional ultrasonic anemometer Gill Solent R2 (u, v, w, Ts), the closed-path gas analyser
Licor_6262 (CO2 and H2O) and the CPC_3010 (aerosol particle number concentration).
Online flux data from SMEAR II
(photo: Juho Aalto)
Recent publications
Mammarella I., Ü. Rannik, P. Aalto,P. Keronen, T. Vesala
and M. Kulmala, 2011, Long-term aerosol particle flux
observations Part II: Particle size statistics and deposition velocities.
Atmospheric Environment, 45(23), 3794-3805
Launiainen S., 2010, Seasonal and inter-annual variability of
energy exchange above a boreal Scots pine forest.
Biogeosciences, 7, 3921-3940.
Ilvesniemi H.! , J., Pumpanen, R., Duursma, P., Hari, P.,
Keronen, P., Kolari, M., Kulmala, I. Mammarella, E., Nikinmaa,
Ü., Rannik, T., Pohja, E., Siivola, and T., Vesala, 2010,
Water balance of a boreal Scots pine forest. Boreal Environ.
Research. 15, 375-396.
Rannik Ü., I. Mammarella, P. Aalto, P. Keronen, T. Vesala
and M. Kulmala, 2009, Long-term aerosol particle flux
observations Part I: Uncertainties and time-averaged statistics.
Atmospheric Environment, 43(21), 3431-3439
Mammarella I., S. Launiainen, T. Gronholm, P. Keronen, J.
Pumpanen, Ü. Rannik, T. Vesala, 2009, Relative humidity
effect on the high frequency attenuation of water vapour flux
measured by a closed-path eddy covariance system, Journal of
Atmospheric and Oceanic Technology, 26(9), 1856-1866.