Cyclones

Rationale: Tropical cyclones derive their immense energy from the release of latent heat when moist ocean air ascends, cools, and condenses in cumulonimbus cloud bands.

Rationale: A sea surface temperature of at least 26.5°C to 27°C is necessary to maintain sufficient evaporation and convective instability for tropical cyclone formation.

Rationale: The Coriolis force is essential to deflect winds inward toward the low-pressure center rather than flowing straight across it. At the equator, the Coriolis force is zero, preventing rotational vortex development.

Rationale: The occlusion stage occurs when the cold front catches up with the warm front, lifting the warm air sector completely off the surface, leading to the gradual decay of the cyclone.

Rationale: In the Northern Hemisphere, low pressure lies to the left when standing with one's back to the wind, as dictated by pressure gradient and Coriolis forces.

Rationale: The eye is characterized by descending air, clear skies, and calm winds, surrounded by the towering eyewall where severe weather occurs.

Rationale: Extra-tropical cyclones are powered by horizontal temperature gradients (fronts), whereas tropical cyclones are warm-core systems powered by moisture condensation.

Rationale: Tornadoes are localized funnel clouds and are not regional tropical cyclones. Furthermore, tropical cyclones do not form in the South Atlantic due to cold waters and strong wind shear.

Rationale: The warm sector of a temperate cyclone lies wedged between the advancing warm front ahead and the following cold front behind.

Rationale: Tropical cyclones typically move relatively slowly across the ocean, averaging around 15 to 25 km/h, though wind speeds inside the vortex are much higher.

Rationale: Upper-level divergence acts as a pump, removing rising air from the storm's center and allowing continuous inflow and low-level convergence.

Rationale: Storm surge—the abnormal wall of water pushed ashore by persistent hurricane-force winds—causes the vast majority of casualties and coastal destruction during tropical cyclone landfall.

Rationale: The Fujita scale measures tornado intensity based on the damage inflicted on structures and vegetation.

Rationale: Once over land, tropical cyclones lose their primary energy source (warm ocean water and latent heat) and face increased frictional drag, causing rapid dissipation.

Rationale: An occluded front forms when a fast-moving cold front catches up to a slower warm front, forcing the warm air mass entirely aloft.

Rationale: In low latitudes of both hemispheres, tropical cyclones are steered westward by the prevailing easterly trade winds before recurving poleward.

Rationale: The eye of a tropical cyclone typically ranges from 30 to 60 km in diameter, though it can vary widely in intense storms.

Rationale: Virtually all weather phenomena, including tropical and temperate cyclones, take place within the troposphere where convection and water vapor are concentrated.

Rationale: In the Southern Hemisphere, the Coriolis force deflects winds to the left, resulting in a clockwise inward circulation around low-pressure centers.