Which of the following statements are correct with respect to RadiativeForcing 1 nbs...........

Environment and Ecology Pollution

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Which of the following statements are correct with respect to RadiativeForcing.

1. RF expresses the change in energy in the atmosphere due to GHG emissions.

2. Negative Radiative Forcing implies stronger greenhouse action.

3. Positive Radiative Forcing implies cooling of the atmosphere or weaker greenhouse effect.

Choose the correct alternative:

1 only

2 and 3 only

1 and 3 only

1, 2 and 3

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Explanation:

Radiative Forcing (RF) is the measurement of the capacity of a gas or other forcing agents to affect that energy balance, thereby contributing to climate change.
• Positive radiative forcing results in an increase in Earth’s energy budget and ultimately leads to warming. Because GHGs absorb infrared radiation and re-emit it back to the Earth’s surface, thus increasing the Earth’s energy balance, they have positive RF values.
• Negative radiative forcing results in a decrease in the energy budget and ultimately leads to cooling. Aerosol particles reflect solar radiation, leading to a net cooling, and therefore have negative RF values.