Pollen grains of anemophilic plants entering the atmosphere. Cluster composition
V.V. Golovko1, G.A. Zueva2, T.I. Kiseleva2
1V.V. Voevodsky Institute of Chemical Kinetics and Combustion of the Siberian Branch of the RAS, Novosibirsk, Russia
2Central Siberian Botanical Garden of the Siberian Branch of the RAS, Novosibirsk, Russia
Keywords: pollen, anemophilous plants, atmospheric aerosol, clusters
Abstract
The friction velocity (dynamic velocity) u * enters into nearly all computational schemes used for forecasting the state of the atmosphere. To find this velocity, it is necessary to know the mixed moments of turbulent components of the wind vector. However, the information about turbulence is lacking at the initial stage of forecast. That is why model equations are usually used for u *. These equations are based on the relation of the friction velocity to the horizontal wind velocity Vh . In this work, we considers the empirical relations u *( Vh ) for various conditions (different time of the day, seasons, types of stratification, observation sites, and measurement altitudes). Initial experimental data used to derive these relations were obtained by ultrasonic meteorological stations operating in the surface air layer at different observation sites.
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