| | | 21.9 Acknowledgements |
Funding for this research was provided by Estonian Ministry of Environment (project 0362480s03), by Estonian Science Foundation grants No. 5425 and 5738, by the European Union projects MANTRA-East (contract EVK1-CT-2000-00076) and CLIME (contract EVK1-CT-2002-00121). We used data obtained in frames of the State Monitoring Program of the Estonian Ministry of Environment.
| | | 21.9 Acknowledgements |