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).

EC Hyytiala mast 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.