1. Department of Civil and Environmental Engineering; Stanford University; Stanford California USA
2. Laboratory for Aviation and the Environment, Department of Aeronautics and Astronautics; Massachusetts Institute of Technology; Cambridge Massachusetts USA
3. Laboratory for Atmospheric Chemistry and Dynamics; NASA Goddard Space Flight Center; Greenbelt Maryland USA
4. National Center for Atmospheric Research; Boulder Colorado USA
5. Department of Atmospheric Sciences; University of Illinois at Urbana-Champaign; Urbana Illinois USA
6. School of Forestry and Environmental Studies; Yale University; New Haven Connecticut USA