Summertime influence of Asian pollution in the free troposphere over North America

Q. Liang, L. Jaeglé, R. C. Hudman, S. Turquety, D. J. Jacob, Melody A. Avery, Edward V. Browell, G. W. Sachse, D. R. Blake, W. Brune, X. Ren, Ronald C. Cohen, Jack E. Dibb, Alan Fried, Henry E. Fuelberg, Michael J. Porter, B. G. Heikes, Greg Huey, Hanwant B. Singh, P. O. Wennberg