C. Donald Ahrens is Emeritus Professor at Modesto Junior College and the author of two best-selling textbooks for Cengage Learning. The Textbook and Academic Authors Association awarded Professor Ahrens its 2009 McGuffey Longevity Award in the physical science category for his market-leading text METEOROLOGY TODAY, 9e. Dr. Ahrens has influenced not only professionals in the field of atmospheric science, but has brought better understanding of the science to hundreds of thousands of non-atmospheric science majors who used his books to expand their knowledge of weather and climate. In 2007, the National Weather Association awarded Professor Ahrens a lifetime achievement award for these accomplishments.

METEOROLOGY TODAY, Ninth Edition, is one of the most widely used and authoritative texts for the introductory meteorology course. This ninth edition helps you understand and appreciate the dynamic nature of the inevitable weather phenomena that continually influence our lives. The text?s clear and inviting narrative is supplemented by numerous pedagogical features that encourage observing, calculating, and synthesizing information.