What is the Fujiwhara effect? Explain its impact on the movement and intensity of tropical cyclones. (Answer in 150 words)

- What is the Fujiwhara effect? Explain its impact on the movement and intensity of tropical cyclones. (Answer in 150 words)
Introduction
The Fujiwhara effect is a meteorological phenomenon in which two nearby tropical cyclones rotate around a common centre due to their mutual gravitational-like atmospheric interaction.
Body
Impact on Cyclone Movement:
1. Mutual Rotation: Two cyclones begin revolving around a common midpoint, usually counter-clockwise in the Northern Hemisphere and clockwise in the Southern Hemisphere.
2. Altered Tracks: Their normal paths may be significantly deflected, making cyclone movement unpredictable and difficult to forecast.
3. Possible Merger: If the cyclones come sufficiently close, the stronger system may absorb the weaker one or both may merge.
Impact on Intensity:
1. Intensification: Merger can produce a larger circulation and sometimes strengthen the dominant cyclone if oceanic and atmospheric conditions are favourable.
2. Weakening: Interaction may also disrupt moisture supply and wind structure, reducing cyclone intensity.
3. Extended Hazards: Changed tracks can expose wider areas to heavy rainfall, strong winds and storm surges.
Conclusion
Thus, the Fujiwhara effect complicates cyclone forecasting by altering both trajectory and intensity, thereby increasing uncertainty in disaster preparedness and response.