What is the Pacific Decadal Oscillation (PDO) that is being linked to Gujarat's heavy rains? Here's what students should know

Days after Gujarat witnessed unusually intense rainfall, scientists have pointed to a large-scale climate phenomenon known as the Pacific Decadal Oscillation ( PDO ) as one of the factors that may have amplified the weather system. While no single event can be blamed solely on the PDO, experts say its interaction with the ongoing monsoon and other ocean-atmosphere patterns can influence rainfall distribution across several parts of the world, including India.