This textbook and software provide an introduction to the soil-land-vegetation-atmosphere system for advanced students and researchers in atmospheric science, hydrology and plant physiology.Based on more than 20 years of research and teaching, this textbook, and the associated CLASS software, is an excellent introduction to the interactions between the atmosphere and the land for advanced students, and a reference text for researchers in atmospheric physics and chemistry, hydrology, and plant physiology.Based on more than 20 years of research and teaching, this textbook, and the associated CLASS software, is an excellent introduction to the interactions between the atmosphere and the land for advanced students, and a reference text for researchers in atmospheric physics and chemistry, hydrology, and plant physiology.Based on more than 20 years of research and lecturing, Jordi Vil?-Guerau de Arellano and his team's textbook provides an excellent introduction to the interactions between the atmosphere and the land for advanced undergraduate and graduate students and a reference text for researchers in atmospheric physics and chemistry, hydrology, and plant physiology. The combination of the book, which provides the essential theoretical concepts, and the associated interactive Chemistry Land-surface Atmosphere Soil Slab (CLASS) software, which provides hands-on practical exercises and allows students to design their own numerical experiments, will prove invaluable for learning about many aspects of the soil-vegetation-atmosphere system. This book has a modular and flexible structure, allowing instructors to accommodate it to their own learning-outcome needs.Part I. The Land-Atmospheric Boundary Layer System: 1. Seeking interdisciplinary connections; Part II. The Uncoupled System: 2. Atmospheric boundary layer dynamics; 3. Atmospheric boundary layer chemistry; 4. Potential temperature budget: diurnal variation of temperature; 5. Moisture budget: diurnal variation of spl#†