Earth’s Climate System: The Big Picture

In this opening lesson, Professor Victor Zane introduces Earth’s climate system as an interconnected set of physical components: atmosphere, ocean, land, ice, living systems, and incoming and outgoing energy. The lesson distinguishes weather from climate, explains why climate is not controlled by one factor alone, and frames climate science as the study of energy flows, feedbacks, and evidence across time.

By the end, learners will be able to describe the major parts of the climate system, explain the role of the Sun and Earth’s energy balance, identify why oceans and ice matter so much, and recognize the difference between natural variability and long-term climate change. More detailed treatment of greenhouse gases, paleoclimate records, models, impacts, and solutions is saved for later lessons.