A satellite view of the sources and interannual variability of free tropospheric PAN over the eastern Pacific Ocean during summer and its timeline for trend detection

Liye Zhu1, Emily V Fischer2, Vivienne Payne3, Thomas W Walker4, John R Worden5, Zhe Jiang6 and Susan Sund Kulawik3, (1)University of Colorado at Boulder, Boulder, CO, United States, (2)Colorado State University, Atmospheric Science, Fort Collins, CO, United States, (3)NASA Jet Propulsion Laboratory, California Institute of Technology, Pasadena, CA, United States, (4)California Institute of Technology, Pasadena, CA, United States, (5)Jet Propulsion Laboratory, Pasadena, CA, United States, (6)University Corporation for Atmospheric Research, Boulder, CO, United States