Climate Change Decouples Extreme Rainfall from Traditional Monsoon Drivers
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Climate experts warn that rising sea surface temperatures are driving intense, localized rainfall events across India, overriding the suppressive effects of El Niño and necessitating a paradigm shift in urban disaster management.
Recent climate analysis highlights a concerning trend in India’s monsoon patterns: the increasing frequency of extreme rainfall events is no longer strictly tethered to traditional large-scale climate drivers like El Niño. While El Niño typically suppresses overall monsoon rainfall, rising temperatures over the Arabian Sea and the Bay of Bengal are providing excess moisture, fueling intense, short-duration downpours that cause flash floods and urban inundation.
This phenomenon represents a significant shift in the Indian monsoon's behavior. The warming of the Indian Ocean acts as a catalyst, increasing the moisture-holding capacity of the atmosphere, which leads to 'cloudburst-like' situations even in years where the broader monsoon circulation might be weak. This decoupling of extreme events from seasonal averages poses a severe challenge to existing disaster management frameworks, which are often designed around historical rainfall averages rather than the current reality of high-intensity, localized precipitation.
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