Which of the following scenarios are examples of positive-feedback mechanism? Check all that are correct

Deforestation near the Sahara Desert causes the soil to be exposed. Exposed soil evaporates moisture more readily. Insufficient moisture leads to the death of trees.

A warmer atmosphere causes more evaporation. Water vapor is a greenhouse gas, so this increases the temperature.

Warmer temperatures cause snow to melt. This makes the ground darker, allowing more solar radiation to be absorbed. The warmer ground warms the atmosphere.

Explanation:

Positive feedback mechanism refers to, the changes in a system, which induces further changes. It exists in an environment that leads to the rise in the causative effect of the environment which can change the precipitation, temperature, precipitation and other climatic conditions of the area

Therefore, the examples of positive-feedback mechanism include:

• Deforestation near the Sahara Desert causes the soil to be exposed. Exposed soil evaporates moisture more readily. Insufficient moisture leads to the death of trees.

• A warmer atmosphere causes more evaporation. Water vapor is a greenhouse gas, so this increases the temperature.

• Warmer temperatures cause snow to melt. This makes the ground darker, allowing more solar radiation to be absorbed. The warmer ground warms the atmosphere.