Statistical methods in the atmospheric sciences Statistical Methods in the Atmospheric Sciences Fourth Edition has always strived and succeeded to meet the needs of students and instructors in addition to supporting researchers and operational practitioners as a comprehensive but still usable reference. This newly revised fourth edition continues in that tradition. Updates new topics and expanded sections build upon the strengths of the prior edition while providing new content where there have been advances in the field including Bayesian analysis forecast verification and a new chapter dedicated to ensemble forecasting