本书旨在介绍Fortran和NCAR命令语言（NCL）的实际应用。力求理论完整、实例丰富、解释详尽、实践充分。共分为9章，主要包括Fortran和NCL介绍、Fortran语言基础、选择和循环结构、数组、子程序、文件，以及NCL的一维和二维图形绘制技术和合成分析应用。为了方便学生的学习，每个章节首先明确知识重点和难点，帮助学生掌握知识结构，加深对知识的理解。而后通过由浅入深的实例分析，学生可以深入了解这些工具在专业中的应用。最后，提供练习题，以促进学生的独立思考，提高他们的动手能力。这本书适合Fortran和NCL的初学者和程度较高者，可以作为学习两种语言的参考书。 This book is aimed at the practical application of Fortran and NCAR Command Language (NCL). It is to strive for complete theory, rich examples, detailed explanation and full practice. It is divided into 9 chapters, mainly including Introduction to Fortran and NCL, Fundamentals of Fortran Language, Selective and Repetitive Execution, Arrays, Subprograms, Files, as well as one-dimensional and two-dimensional graphic drawing techniques and composite analysis applications of NCL. To facilitate students' learning, each chapter firstly clarifies the key and difficult points of the knowledge, helping students to grasp the knowledge structure and deepen their understanding of the knowledge. By analyzing examples from shallow to deep level, students can deeply understand the application of these tools in their majors. Finally, exercises are provided to promote students' independent thinking and improve their hands-on abilities. This book is suitable for beginners and advanced students of Fortran and NCL, and can serve as a reference book for learning two languages.