1. Instituto de Pesquisas Energéticas e Nucleares (IPEN) Atmospheric Chemistry Laboratory, Sau Paulo 05508-000, Brazil;
2. National Oceanic and Atmospheric Administration (NOAA), Earth System Research Laboratory, Boulder, USA
3. Cooperative Institute for Research in Environmental Sciences (CIRES), University of Colorado, Boulder, USA;
4. University of Leeds, United Kingdom;
5. Harvard University, Cambridge, MA, USA