1. Bay Area Environmental Research Institute Petaluma California USA
2. Atmospheric Chemistry Observations and Modeling LaboratoryNational Center for Atmospheric Research Boulder Colorado USA
3. Earth Science DivisionNASA Ames Research Center Moffett Field California USA
4. Global Monitoring DivisionNOAA Earth System Research Laboratory Boulder Colorado USA
5. Chemical Sciences DivisionNOAA Earth System Research Laboratory Boulder Colorado USA