twin cyclone Flashcards
(20 cards)
What are twin cyclones?
Twin cyclones are a pair of tropical cyclones that form simultaneously on each side of the equator, rotating in opposite directions.
What was an example of twin cyclones in May 2022?
Twin cyclones Asani (Northern Hemisphere) and Karim (Southern Hemisphere).
What atmospheric phenomenon helps in the formation of twin cyclones?
The Madden-Julian Oscillation (MJO) and Rossby waves promote convection, aiding in twin cyclone formation.
How do twin cyclones rotate in different hemispheres?
In the Northern Hemisphere, they rotate counterclockwise, while in the Southern Hemisphere, they rotate clockwise.
What is the Fujiwhara Effect?
When two cyclones come close, they can interact, orbit each other, merge, or repel due to the Fujiwhara Effect.
Why does the Madden-Julian Oscillation (MJO) favor twin cyclone formation?
MJO enhances convection, providing an environment conducive to cyclonic circulation.
How often does the Madden-Julian Oscillation (MJO) cycle occur?
It recurs every 30 to 60 days.
What is the main force that initiates the spinning of twin cyclones?
Earth’s rotation (Coriolis effect) provides the spin required for cyclone formation.
How do twin cyclones impact global weather systems?
They influence monsoons, jet streams, and even weather patterns in distant regions.
What happens if twin cyclones move too close to each other?
They can merge into a larger system or disrupt each other’s paths due to the Fujiwhara Effect.
Why do twin cyclones form near the equator?
Warm ocean waters and weak wind shear create favorable conditions for their formation.
What is the role of low-level westerly winds in twin cyclone formation?
These winds enhance rotation and help sustain the cyclonic activity.
What impact do twin cyclones have on ocean currents?
They can stir up deeper, cooler waters, influencing ocean circulation and heat distribution.
Why are twin cyclones not always symmetrical in strength?
Differences in sea surface temperatures, wind patterns, and land interactions affect their intensity.
What is the primary energy source for twin cyclones?
The latent heat released from condensation of warm, moist air over tropical oceans.
Can twin cyclones occur in any ocean basin?
Yes, but they are most common in the Indian and Pacific Oceans due to warm waters and atmospheric conditions.
How does the Intertropical Convergence Zone (ITCZ) influence twin cyclone formation?
ITCZ provides the necessary convergence of moist air, aiding in cyclone development.
How do twin cyclones affect global climate?
They redistribute heat and moisture, impacting weather patterns and precipitation.
What happens to twin cyclones when they move over land?
They weaken due to loss of warm oceanic moisture, which is their primary energy source.
What are hybrid cyclones?
Cyclones that exhibit characteristics of both tropical and extratropical cyclones.
