Geography • Physical GeographyMedium
Which atmospheric phenomenon is primarily responsible for the reflection and scattering of shortwave solar radiation back into space, contributing to the planetary albedo?
A. Greenhouse gas absorption by carbon dioxide and water vapor
B. Cloud cover and atmospheric particulate matter (aerosols)✓ Correct Answer
C. Stratospheric ozone depletion over the poles
D. Longwave thermal radiation emitted by the terrestrial surface
💡 Solution & Explanation
Cloud cover and atmospheric aerosols directly scatter and reflect incoming shortwave solar radiation back into space, which significantly increases Earth's planetary albedo. Greenhouse gases primarily absorb and emit longwave terrestrial radiation rather than reflecting shortwave sunlight. This cloud-radiation feedback remains a critical component in modeling global climate systems and atmospheric energy budgets.
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