@article{knight_davis_sheridan_hondula_sitka_deaton_lee_gawtry_stenger_mazzei_et al._2008, title={Increasing frequencies of warm and humid air masses over the conterminous United States from 1948 to 2005}, volume={35}, number={10}, journal={Geophysical Research Letters}, author={Knight, D. B. and Davis, R. E. and Sheridan, S. C. and Hondula, D. M. and Sitka, L. J. and Deaton, M. and Lee, T. R. and Gawtry, S. D. and Stenger, P. J. and Mazzei, F. and et al.}, year={2008} }