Topic : Important Geophysical phenomena such as earthquakes, Tsunami, Volcanic activity, cyclone etc., geographical features and their location-changes in critical geographical features (including water-bodies and ice-caps) and in flora and fauna and the effects of such changes.
1. What do you understand by ice-albedo feedback? And how can it be related to climate change? Discuss.(250 words)
Why the question:
The question is premised on the concept of ice-albedo feedback and its relation with climate change.
Key Demand of the question:
Student must discuss the concept of ice-albedo feedback and explain its relation with climate change, its impact on climate change and other effects.
Discuss – This is an all-encompassing directive – you have to debate on paper by going through the details of the issues concerned by examining each one of them. You have to give reasons for both for and against arguments.
Structure of the answer:
Define briefly the concept – Ice–albedo feedback is a positive (exacerbating) feedback climate process where a change in the area of ice caps, glaciers, and sea ice alters the albedo and surface temperature of Earth.
Discuss its spatial aspects, location etc. – It is prominent in areas where a patch of sea ice completely melts, and results in uncovering darker seawater surface that absorbs more sunlight than ice. Ice reflects some of the solar energy back to space because it is highly reflective. If an equivalent area of ice is replaced by water or land, (having a lower albedo value) reflects less and absorbs more energy, resulting in a warmer Earth.
Discuss then in detail the Ice albedo feedback’s relationship with climate change.
Conclude with need to have a global effort to prevent further melting of sea ice by constantly monitoring sea ice loss and taking adequate measures to prevent human induced climate change.