1. Biogeochemistry Department; Max Planck Institute for Chemistry; Mainz; Germany
2. Instituto sull' Inquinamento Atmosferico del CNR; Monterotondo Scalo; Italy
3. Department of Forest Science and Resources; University of Tuscia and Istituto Nationale Fisica della Materia (INFM); Viterbo; Italy
4. Instituto Nacional de Pesquisas da Amazônia (INPA); Manaus; Brazil
5. ALTERRA; Wageningen; Netherlands