What are the fluxes of greenhouse gases from the greater Los Angeles area as inferred from top-down remote sensing studies?

Jacob Hedelius1, Paul O Wennberg1, Debra Wunch2, Coleen Marie Roehl1, James Robert Podolske3, Patrick Hillyard and Laura T Iraci3, (1)California Institute of Technology, Pasadena, CA, United States, (2)University of Toronto, Physics, Toronto, ON, Canada, (3)NASA Ames Research Center, Moffett Field, CA, United States