GREENHOUSE

2. – Massive ice body whose global retreat serves as direct evidence of warming.
4. – Earth's major thermal reservoir absorbing excess atmospheric heat and carbon dioxide.
5. – Longwave thermal radiation absorbed and re-radiated by greenhouse gas molecules.
8. – Type of ocean expansion where warming water increases in volume, raising sea levels.
10. – Type of forcing resulting from an imbalance between incoming solar and outgoing heat energy.
12. – Global level rise caused by thermal expansion and melting continental ice.
14. – Prolonged period of abnormally dry weather exacerbated by changing climate patterns.
16. – The natural atmospheric mechanism that retains heat to make Earth habitable.
17. – Short-term state of the atmosphere, contrasting with long-term climate trends.
19. – Atmospheric gas playing dual roles in solar filtration and radiative balance.
20. – Fundamental climate variable exhibiting a global upward trend over the past century.

1. – Phenomenon where corals expel symbiotic algae due to elevated ocean surface temperatures.
3. – Gaseous water in the atmosphere acting as an amplifying positive feedback agent.
6. – Large-scale clearing of trees that reduces Earth's natural carbon sinks.
7. – Permanently frozen soil in polar regions that releases greenhouse gases as it thaws.
9. – Element forming dioxide ($CO_2$), the dominant anthropogenic greenhouse gas.
11. – Discharge of gases and pollutants from fossil fuel combustion into the atmosphere.
13. – The gaseous envelope surrounding Earth that traps heat through radiative forcing.
15. – Potent greenhouse gas emitted by ruminant livestock and flooded rice paddies.
18. – Oxide gas compound from agricultural fertilizers acting as a greenhouse gas.