Simmons, A.J., Willett, K.M., Jones, P.D., Thorne, P.W. and Dee, D., 2010
“Low-frequency variations in surface atmospheric humidity, temperature and precipitation: Inferences from reanalyses and monthly gridded observational datasets.”
Journal of Geophysical Research, 115, D01110, doi:10.1029/2009JD012442