: Why India’s northeastern states are witnessing frequent floods #IndiaNEWS India’s northeastern states are suffering from floods and landslides once again in mid-June. Devastating floods had also

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Why India’s northeastern states are witnessing frequent floods #IndiaNEWS
India’s northeastern states are suffering from floods and landslides once again in mid-June. Devastating floods had also wreaked havoc in mid-May. More than 10 lakh people have been affected and well over 1 lakh houses are damaged.Reports of devastating floods in the North East have been making headlines for nearly a decade. Much attention has been paid to the processes that cause large-scale extreme rainfall events over the rest of India. Seasonal total rainfall has been decreasing over the core monsoon zone as well the North East over many decades. Decreasing rainfall has been attributed to the pollution-driven solar dimming which has prevented the subcontinent from warming and thus weakened the monsoon circulation.In the meantime, the low-pressure systems that originate in the Bay of Bengal and propagate onto land have reduced in number at the active/break periods but have increased at weather timescales of a few days. Low-pressure systems contribute over 50% of the seasonal total rainfall. A warmer Arabian Sea is pumping more moisture onto land and combining with the low-pressure systems to produce large-scale rainfall events which have increased from two per year to six per year in recent decades.Southwest Monsoon has further advanced into most parts of Arabian Sea & most parts...Read more

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