Aircraft observations of thin cirrus clouds near the Tropical Tropopause

Pfister, L., H. Selkirk, E. Jensen, M. R. Schoeberl, O. B. Toon, E. Browell, W. B. Grant, B. Gary, M. J. Mahoney, T. P. Bui, and E. Hintsa (2001), Aircraft observations of thin cirrus clouds near the Tropical Tropopause, J. Geophys. Res., 106, 9765-9786.