Question

1. which of the following is an example of a climate feedback loop?

a. melting ice leads to more sunlight absorption
b. trees absorbing co2 and releasing oxygen
c. cloud cover reflecting solar radiation
d. rainfall replenishing groundwater sources

Explanation:

A climate feedback loop involves a process that amplifies or dampens a climate - related change.

• Option a: Melting ice reduces the albedo (reflectivity) of the Earth's surface. With less ice, more sunlight is absorbed, which causes more warming, and this warming leads to more ice melting. This is a positive feedback loop as it amplifies the initial change (warming).
• Option b: Trees absorbing CO₂ and releasing oxygen is part of the carbon and oxygen cycles, but it does not create a feedback loop related to climate change amplification or dampening in the same way as a climate feedback loop.
• Option c: Cloud cover reflecting solar radiation is a single - direction process of reflection and does not create a loop where the outcome feeds back to influence the initial process in a way that changes the climate trajectory (it's more of a radiative process without a feedback loop structure here).
• Option d: Rainfall replenishing groundwater is part of the water cycle and not a climate feedback loop as it does not affect the climate system in a way that creates a self - reinforcing or self - dampening loop related to climate change.

Answer:

a. Melting ice leads to more sunlight absorption