Solar Radiation, Heat Balance and Temperature
Manipur Board · Class 11 · Geography
Summary of Solar Radiation, Heat Balance and Temperature for Manipur Board Class 11 Geography. Key concepts, important points, and chapter overview.
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Overview
The atmosphere is a vital envelope of gases surrounding Earth that supports life. Earth receives energy from the Sun and radiates it back to space, maintaining a delicate balance. This chapter explores how solar radiation heats our planet, how heat is distributed through the atmosphere, and how temp
Key Concepts
Incoming solar radiation received by Earth
Incoming solar radiation received by Earth. Earth receives 1.94 calories per sq. cm per minute at the top of its atmosphere. The amount varies due to
Key factors include
Key factors include: (1) Earth's rotation on its axis, (2) angle of inclination of sun's rays, (3) length of day, (4) atmospheric transparency, and (5
Earth maintains constant temperature by balancing
Earth maintains constant temperature by balancing incoming solar radiation (100%) with outgoing radiation. 35% is reflected back (albedo), 65% is abso
Four main processes
Four main processes: (1) Conduction - heat transfer between bodies in contact, (2) Convection - vertical movement of heated air, (3) Advection - horiz
Temperature distribution is controlled by
Temperature distribution is controlled by: (1) Latitude - determines insolation received, (2) Altitude - temperature decreases at 6.5°C per 1000m (nor
Learning Objectives
- Understand the concept of insolation and factors affecting it
- Explain the passage of solar radiation through the atmosphere
- Analyze the heat budget and heat balance of Earth
- Describe the processes of heating and cooling of the atmosphere
- Examine factors controlling temperature distribution
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