Departments of Environmental Science and Engineering and Chemical Engineering, California Institute of Technology, Pasadena, CA, USA

now at: Cooperative Inst. for Research in the Atmosphere (CIRA), Colorado State University, Fort Collins, CO, USA

Departments of Environmental Science and Engineering and Chemical Engineering, California Institute of Technology, Pasadena, CA, USA

Departments of Environmental Science and Engineering and Chemical Engineering, California Institute of Technology, Pasadena, CA, USA

Departments of Environmental Science and Engineering and Chemical Engineering, California Institute of Technology, Pasadena, CA, USA

School of Chemical and Biomolecular Engineering, Georgia Institute of Technology, Atlanta, GA, USA

School of Chemical and Biomolecular Engineering, Georgia Institute of Technology, Atlanta, GA, USA

School of Earth and Atmospheric Sciences, Georgia Institute of Technology, Atlanta, GA, USA

Departments of Environmental Science and Engineering and Chemical Engineering, California Institute of Technology, Pasadena, CA, USA

Brechtel Manufacturing Inc., Hayward, CA, USA

Center for Interdisciplinary Remotely-Piloted Aircraft Studies, Naval Postgraduate School, Monterey, CA, USA

Departments of Environmental Science and Engineering and Chemical Engineering, California Institute of Technology, Pasadena, CA, USA

Departments of Environmental Science and Engineering and Chemical Engineering, California Institute of Technology, Pasadena, CA, USA