Which layer of the atmosphere is directly adjacent to the Earth's surface?

The troposphere is the layer of the atmosphere that is directly adjacent to the Earth's surface. It extends from the ground level up to an altitude of about 8 to 15 kilometers, depending on geographical location. This layer is where all weather phenomena occur, and it contains the majority of the atmosphere's mass, including water vapor and aerosols. The troposphere is characterized by a decrease in temperature with increasing altitude, which is significant for weather patterns and climatic conditions.

Understanding the troposphere's position is crucial for weather forecasting and environmental studies, as it is the layer that we experience directly.