About the Authors

Paulo Artaxo

artaxo@if.usp.br

Affiliation Institute of Physics, University of São Paulo, Sao Paulo, Brazil

Hans Christen Hansson

Affiliation Department of Environmental Science, Stockholm University, Stockholm, Sweden

Luiz Augusto T. Machado

Affiliation Institute of Physics, University of São Paulo, Sao Paulo, Brazil

Luciana V. Rizzo

Affiliation Institute of Physics, University of São Paulo, Sao Paulo, Brazil

Competing Interests

The authors have declared that no competing interests exist.