**1. Introduction**

[28] Witte J.C., Duncan B.N., Douglassb A.R., Kurosuc T.P., Chancec K., Retscherd C.,The unique OMI HCHO/NO2 feature during the 2008 Beijing Olympics: Implications for

[29] Draxler, R. R., and Rolph G. D., HYSPLIT (Hybrid Single-Particle Lagrangian Inte‐ grated Trajectory) Model access via NOAA ARL READY, (2003) web site (http:// www.arl.noaa.gov/ready/hysplit4.html), NOAA Air Resources Laboratory, Silver

[30] Hu X.M., Klein P.M., Xue M., Zhang F.Q., Doughty D.C., Forkel R., Joseph E, Fuentes J.D., Impact of the vertical mixing induced by low-level jets on boundary layer ozone

ozone production sensitivity, *Atmos. Environ.,*2011, 45(18), 3103–3111

Spring, MD.

274 Current Air Quality Issues

[31] http://hjj.mep.gov.cn/stjc/

concentration, *Atmos. Environ.*, 2013,70,

The multielement biomonitoring surveys, using suitable plant biomonitors [1] can provide information about long-term and large-scale atmospheric deposition rates of elements. The large-scale biomonitoring programs using selected bioindicators were introduced in Slovakia in the end of 1980s. The bioindicators are commonly available elsewhere in the landscape, and the bioindicated air quality parameters can be related to the particular sampling sites within the ecosystems. mosses and foliage of forest tree species [2,3] as biomonitors of atmospheric deposition of heavy metals began in Slovakia more than 30 years ago, in connection with the problems of dying forests.

Moss species suchas*Pleuroziumschreberi*,*Hylocomiumsplendens*, and*Dicranum*sp. caneffective‐ ly adsorb deposited air pollutants on pectine and cell structures. Bryomonitoring method was validated and tested to large-scale estimate current atmospheric deposition rates of elements between 1970 and2000 [4-6]. Since 2000, in the frame ofUN ECEICP-Vegetationprogram, more than30Europeancountrieshavemonitoredthe current element contentinmosses at about 7000 sampling sites in 5-year intervals. The Slovak national moss surveys since 1990–2010 have mapped elemental content distribution within the whole country (16x16 km net).
