Sources of seasonal variability in tropical upper troposphere and lower stratosphere water vapor and ozone: Inferences from the

Schoeberl, M. R., Selkirk, H. B., Vömel, H., & Douglass, A. R. (2015). Sources of seasonal variability in tropical upper troposphere and lower stratosphere water vapor and ozone: Inferences from the Ticosonde data set at Costa Rica. J. Geophys. Res. Atmos., 120(18), 9684-9701. doi:10.1002/2015jd023299