"Fluid Dynamics for Global Environmental Studies" is a specialized book that addresses the fundamental concepts of environmental fluid dynamics. It is aimed at students, researchers, engineers, and professionals working in the fields of general fluid research as well as atmospheric and oceanic studies. Given that the Earth is surrounded by atmosphere and oceans and is exposed to solar wind, a solid understanding of fluid dynamics is essential for tackling environmental challenges. This book provides a comprehensive presentation of the key ideas, starting from the basics of fluid dynamics to advanced environmental sciences, with a particular emphasis on the careful explanation of the underlying mathematics. It has proven effective over 15 years in the graduate school lectures at Kyushu University and aims to address existing educational issues in this field.